Vanguard Machinery will Meet You at the Peru International Mining Exhibition

 The Peru International Mining Exhibition (EXPOMINA PERU) is one of South America's largest and most influential mining exhibitions. It will be held in Lima, the capital of Peru, from September 11 to 13, 2024.

Vanguard Machinery has fully prepared to participate in the Peru International Mining Exhibition. At that time, Vanguard Machinery will make a stunning appearance with high-efficiency and energy-saving crushing equipment. In addition, Vanguard Machinery will also carefully create efficient and reliable mining solutions for customers. From mine planning and design to equipment selection, installation and commissioning, Vanguard Machinery will provide customers with a full range of one-stop services to ensure the smooth progress of customers' mining projects.

Zhengzhou Vanguard Machinery Technology Co., Ltd.
Address: Room 2102, Building 13, East District of National University Science Park, West Third Ring Road, High-tech Industrial Development Zone, Zhengzhou City, Henan Province
Booth No.: F82
Exhibition time: September 11-13, 2024
Contact number: +86 371 5557 8880   
Whatshapp: +86-13333811995
Email: info@vanguardtec.com
Website: https://es.vanguardtec.com

Vanguard Machinery Debuts at the 2024 Tanzania Mining Exhibition

 With the growing demand for engineering machinery and mining equipment in the African market, especially in Tanzania, Zhengzhou Vanguard Machinery Technology Co., Ltd. (hereinafter referred to as "Vanguard Machinery") will bring its full range of high-end products and innovative solutions to the 8th Tanzania Mining Exhibition 2024 - Mining Equipment & Machinery Trade Exhibition ( 8th MINEXPO TANZANIA 2024 - Mining Equipment & Machinery Trade Exhibition). The exhibition will be held at the Diamond Jubilee Expo Center, Dar-es-Salaam, Tanzania from September 12 to 14, 2024. Vanguard Machinery will show the world its latest achievements in the field of engineering machinery and mining with a strong lineup of exhibitors and cutting-edge technology displays.

As a leading domestic machinery manufacturing company, Vanguard Machinery has been committed to providing efficient and reliable engineering machinery and mining equipment to global customers. The tire-type, crawler-type and modular series mobile crushing plant developed by the company, as well as the industrial grinding series covering coarse powder grinding, fine powder grinding and ultra-fine powder grinding, have won wide acclaim from domestic and foreign customers for their excellent performance.
At this exhibition, Vanguard Machinery will focus on displaying its core products such as the mobile crushing plant series, crushing and sand making series and industrial grinding series as well as a series of supporting equipment to fully meet the production needs of customers and jointly promote the prosperity and development of the global engineering machinery and mining industry.
The exhibition number of Vanguard Machinery is B141. We sincerely invite friends from all walks of life to visit and guide us.

What Is the Reduction Ratio of the Crusher?

 When purchasing crushers, especially jaw crushers for coarse crushing, we often see a word: large reduction ratio. So, what is the reduction ratio of the crusher? What are the commonly used calculation methods?

What is the reduction ratio of the crusher?

    After the ore is blasted, there are mostly large stones of different sizes. They must be crushed by the crusher before they can meet the needs of the project. So do these stones need single-stage crushing or multi-stage crushing? The reduction ratio is a very important factor.

The reduction ratio refers to the ratio of the feed particle size to the product particle size in the crusher, which indicates the degree of material crushing, which directly affects the energy consumption and processing capacity of the crusher.

Commonly used calculation method of reduction ratio

    The reduction ratio has a professional calculation method, which is divided into three types according to different situations:

1. Particle size reduction ratio:the ratio of large block size before and after crushing

Calculation formula:I = larger diameter of feeding material / larger diameter of finished product

    Due to the different habits of each, the large-granularity value method is different. British and American take the sieve width at which 80% of the material can pass through the sieve hole as the large particle size diameter. China and the Soviet Union, 95% of the material can pass through the sieve hole width as the diameter of the large particle size.

Application object:This calculation method is often used in quarries because the width of the feed port of the crusher should be determined according to the large particle size of the ore in the design.

2. Surface reduction ratio:the ratio of the width of the crusher inlet to the width of the outlet

Calculation formula:I=0.85B/S (inlet width/discharge width referred to here)

0.85 is the width coefficient of the crusher to accommodate the material. The value S of the width of the discharge port: the coarse crusher is different from the medium and fine crusher, and the former takes the larger width; The latter takes the smaller width.

Application object:Because this method does not need to do screening analysis of a large number of materials, the approximate calculation can be carried out until the width of the feed port and the discharge port of the crusher, which is simple and fast, so it is widely used in production.

3. Average reduction ratio:the ratio of the average particle size of the material before and after crushing.

Calculation formula:I=average particle size of material before crushing/average particle size of material after crushing

Application object:Because the size and shape of the ores before and after crushing are different, they can only be represented by the average particle size. Therefore, the crushing ratio calculated by the average particle size can reflect the degree of crushing more truly, so it is mostly used in theoretical research.

    In actual production, the appropriate calculation method of the reduction ratio should be selected according to the specific work content of the crusher.

What to do if there is too much Stone Powder in Machine-made Sand? 6 Ways to Control Stone Powder

 Four forms of stone powder in machine-made sand:

(1) Free powder: Stone powder particles do not adhere to each other or adsorb on the surface of sand and can move freely under the action of wind and gravity.

(2) Agglomerated powder: Stone powder particles are tightly aggregated together to form larger stone powder agglomerates, and the particles adhere to each other and aggregate. This type of stone powder aggregate is difficult to remove by traditional powder classification equipment due to the large particle size and mass of the agglomerates.

(3) Adherent powder: Stone powder particles are attached to the surface of larger sand particles. When the surface of the sand particles is relatively smooth, the stone powder particles are easy to remove under mechanical force, but when the surface of the sand particles is uneven, the stone powder particles and the sand particles tightly adhere to each other, and it is difficult to separate them by general mechanical methods.

(4) Cracked powder: There are often some natural cracks on the surface of sand particles, which are tens to hundreds of microns wide or generated by mechanical crushing. These cracks are often filled with a large number of stone powder particles. This is the most compact way of stone powder adhesion.

Stone dust control technology

The 6 types of stone dust control technologies and equipment are as follows:

1. Feeding vibrating grate screen

The increased mud content in machine-made sand will increase water demand and affect the strength of concrete, thus affecting its compression capacity. Therefore, before the raw materials enter the sand making process, they need to be sifted and discarded, which can significantly reduce the moisture content of the raw materials.

According to different material conditions, select the appropriate screen bar spacing to achieve different mud removal effects; For working conditions where the mountain bark is thick, the vegetation is difficult to remove, the mountain is severely weathered, and the interlayer contains large amounts of mud, which is easy to mix with soil, increasing the spacing between screen bars can effectively reduce the mud content.

2. Aggregate chute powder removal device

A certain specification of aggregate from the screening machine enters the aggregate unloading chute after the screening. An integrally detachable diffusion air distribution chamber is arranged in a suitable place, and the blower is connected to it. In this way, the free dust on the aggregate surface is blown up by the blower when passing through the chute and is collected in the dust collector under the suction effect of the dust collector.

In addition, the suction volume of the dust collector can be controlled by adjusting the pipeline regulating valve. When the blower adopts the variable frequency form, the ratio of blowing and suction is adjusted by the variable frequency control of the blower and the adjustment of the regulating valve, to realize the continuous control of the powder content of the finished sand and gravel aggregate within a certain range.

3. High frequency vibration screening pretreatment

Basic principle: The machine-made sand is preprocessed by high-frequency vibration to disperse the powder, separate the powder, coarsely and finely classify the sand, and then remove the stone powder contained by the wind.

Specific method: After the material is crushed by the sand making machine when it enters the screening module, it can be bulked through the bulker or the spiral material lever. This has a preliminary dispersion effect on the agglomerated and adhered stone powder and improves the quality of the material. The uniformity of distribution, at this time, the stone powder can be selected through the air separation device. After primary classification, the materials enter a high-frequency vibrating screen with a vibration frequency of 60-80HZ and an amplitude of 0.15-2.4mm for screening. The vibration intensity of this equipment is 3.5-5 times that of ordinary equipment, which can generate greater mechanical force and has a good dispersion and separation effect on agglomerated stone powder and surface-adhesive stone powder. At the same time, the coarse and fine classification of machine-made sand is efficiently achieved.

Compared with ordinary vibrating screens, the powder removal efficiency of machine-made sand after being screened by high-frequency vibrating screens is significantly increased by about 40%, and the required air volume is reduced by 45%.

4. Centrifugal powder classifier

The powder classifier is used in the sand making process. Its main function is to separate excess stone powder and useful particles and recycle them separately.

Its working principle is: to mix gas and powder to form a gas-solid two-phase flow. The rotating scattering disc and high-speed airflow make the powder-containing airflow obtain centrifugal force during rotation. The centrifugal force obtained by particles of different particle sizes is different, thereby realizing the separation of coarse and fine powder particles. At the same time, the coarse and fine powder particles are recycled separately by corresponding methods. The useful particles are the finished sand, and the useless fine powder is the waste material.

From the position of the powder separator installed in the building station, it is divided into raw material powder classifier and finished material powder selection process layout. The powder classifier has strict requirements on the moisture content. When the moisture content of the feed is higher than 5%, the powder removal efficiency of the powder separator will be seriously reduced. When the moisture content of the feed is 2%, the powder separator can better exert its efficiency, and the sand formation rate is between 60%-70%.

5. V-type static classifier + dynamic high-efficiency classifier

The raw materials enter the sand making machine, and after vibration screening, the coarse powder returns to the sand making machine, and the fine powder is sent to the combined classifier of the V-type static classifier + dynamic high-efficiency powder classifier. After being homogenized by the material distributor, it enters the classification system, the coarse particles enter the finished product warehouse, and the fine particles and fine powder enter the dynamic classifier with airflow. By adjusting the speed of the dynamic powder selector, the sand and gravel classification is adjusted, and the qualified products are discharged from the coarse powder pipe into the finished product warehouse. Adjust the particle grading of the finished product, and the fine powder is collected by the cyclone dust collector with the airflow and enters the stone powder warehouse. The airflow enters the V-type air inlet through the circulating blower.

6. Air Screen

The air screen combines wind separation technology based on vibration screening to realize the three functions of particle size adjustment, grading and screening.

Its working principle: The material is evenly spread under the action of the air screen dispersion device and blown to different positions of the air selection chamber by the blower. The lighter the material (the smaller the particle size), the farther it is blown away and the longer the screening distance; The lightest stone powder will be blown to the powder outlet position, adsorbed by the dust collector-induced draft blower, and finally concentrated in the powder tank. At the same time, the particle size adjustment plate automatically adjusts the proportion of the returned material to fine-tune the fineness modulus of the finished sand, thereby ensuring the stability of the fineness modulus of the finished sand.

For the dry sand making system using an air screen, the raw materials need to control their moisture content below 1.6% (surface moisture content 0.6%), without mud, and the feed particle size is 0-25mm and the gradation is continuous. If the raw materials change, the system capacity will change accordingly. If the raw materials contain too much mud or stone powder, separation processes such as powder classifier or powder removal equipment need to be used in the front stage.

How to Improve the Crushing Effect of Multi-cylinder Hydraulic Cone Crusher by Controlling Power and Material Level?-Vanguard Machinery Tech

 The multi-cylinder cone crusher has the characteristics of large production capacity, high efficiency, laminated crushing, excellent final product particle shape, simple operation, and a high degree of automation. It is widely used in medium and fine crushing in the sand and gravel aggregate industry and mining industry, especially in medium-hard material processing systems. In the production of multi-cylinder hydraulic cone crushers, some on-site application methods can be used to effectively improve the crushing effect of the cone crusher.

Power Control

In the process of applying a multi-cylinder hydraulic cone crusher for on-site work, its main work control method is the change of feeding amount. Therefore, in the specific working process, if the feed volume is large, the driving power requirements of the mechanical equipment will also be large. To ensure its working quality, its working power should be controlled between 75% and 90%, and its maximum power should not exceed the rated power. At the same time, during on-site work, operators should strictly avoid running the crusher in a low-power state. If it is running, its running time should not exceed 5 seconds. In specific on-site crushing operations, the power of the crusher must reach more than 40% of the rated value.

Material level control

In field applications, if the multi-cylinder hydraulic cone crusher has been running for more than 30 minutes but still cannot feed, the crusher needs to be temporarily shut down and then turned on again when feeding is possible. When the cavity of the multi-cylinder hydraulic cone crusher is crowded with materials, its optimal working condition is when the operating power reaches 75% to 90% of the rated value. In specific operations, the work of the multi-cylinder hydraulic cone crusher needs to be controlled by changes in the feed volume, and the discharge port is used as an auxiliary control facility. The adjustment of the discharge port can effectively compensate for the wear of the liner. Ensure the stability of product particle size. At the same time, the tight edge discharge port adjustment and cavity type selection can also be used to ensure that the crusher cavity is filled with materials. Under normal circumstances, the height of the materials in the cavity should exceed the material distribution plate by more than 300mm. The driving power should be kept stable and controlled at 75% to 90% of the rated value.

During on-site operations, the radar level meter can be used to detect the material level in the crusher cavity, or it can be used as a device to control the signal input of the material quantity control loop in the crusher. When the material in the crusher cavity is crowded Finally, the driving power can be further optimized through reasonable adjustment of the discharge port. For example, after the crusher discharge opening is increased, the given material level driving power of the crusher will be reduced, meanwhile, the feeding amount in the crusher cavity will be increased; After the reducing crusher discharge opening, the given material level driving power of the crusher will be increased, meanwhile, the feeding amount in the crusher cavity will be reduced.

Multi-cylinder hydraulic cone crushers have exerted good application value in many fields today. Compared with traditional crushers, the installation of multi-cylinder hydraulic cone crushers is simpler and more convenient, and their work efficiency and work quality are also higher. In production, it is necessary to control the on-site application of multi-cylinder hydraulic cone crushers and perform targeted operations to improve the production efficiency and quality of the equipment.

As one of the flagship products of Vanguard Machinery, the CP series multi-cylinder hydraulic cone crusher has been widely used in production lines everywhere and has achieved good market response. This series of crushers has a good grain shape with laminated crushing, accurate and reliable full hydraulic control, and easy equipment maintenance. They are your right assistant on the road to producing high-quality aggregates.

Led by High-end Intelligent Manufacturing Technology, Vanguard Machinery will Meet You in Vietnam in the Spring

"Flowers bloom brilliantly just because of you." Vietnam and China are connected by mountains and rivers, and we share a deep friendship of "comrades and brothers". As the top event in Vietnam's mining and related industries, the Vietnam International Mining, Engineering Machinery, Construction and Technology Exhibition will be held at the National Convention and Exhibition Construction Center in Hanoi, Vietnam from April 24 to 26, 2024. Vanguard Machinery will be attending with the theme of "high-end, Intelligence and Win-win", and we will bring a full range of products and solutions to booth A16 and look forward to your visit!

Vietnam is located on the Southeast Asian peninsula with rich mineral resources and a superior geographical location, which provides strong support for the development of the construction machinery and mining market. At the same time, the Vietnamese government also attaches great importance to the development of construction machinery and mining fields and has formulated a series of supporting policies to create a good environment for the growth and development of enterprises. According to customs data in the mining machinery industry in 2023, China's exports to Vietnam will be approximately US$900 million, showing a year-by-year growth trend with strong market demand.

Aiming at specific markets, Vanguard Machinery customizes personalized development models, enriches product systems, and innovates service models. The "7×24-hour service commitment" comprehensively integrates customer needs before purchasing machines from service speed, maintenance costs, quality standards, etc. From equipment installation to post-operation services, we integrate them into a value chain oriented by customer needs. No matter where you are, we will take innovative quality and excellent service as the benchmark, and deeply engrave the "MADE IN CHINA" quality brand in the world and every corner.

Winter Guardian: Tips on the Care and Maintenance of Mining Equipment in Low-temperature Environments

 As the core equipment in the production process, the crusher's stable operation is crucial to the entire mining operation. Especially in the cold winter, problems such as the solidification of lubricating oil, hardening and wear of lubricating parts, and difficulty in starting equipment frequently occur, which brings considerable trouble to mining production. This article aims to reveal to you the core maintenance strategies of mining crushers in low-temperature environments, ensuring that the equipment operates stably and efficiently in severe cold, and safeguarding mine production.

1. Selection of lubricating oil and solution to solidification problems

(1). Lubricating oil selection:

In low-temperature environments, low-temperature lubricating oil should be selected. Their viscosity changes less with temperature and has better fluidity at low temperatures. They can effectively prevent solidification and ensure that equipment is effectively lubricated and protected in low-temperature environments. Extend the service life of the equipment and improve the reliability and stability of the equipment. Common low-temperature lubricating oils include winter-type engine oil, grease, etc. In actual applications, appropriate low-temperature lubricating oil products are selected based on the specific working conditions, ambient temperature and requirements of the equipment.

(2). Solve the problem of lubricating oil solidification

1) Choose low-temperature lubricating oil to ensure that it still has good fluidity and lubrication performance in low-temperature environments;

2) During the operation of the equipment, the oil temperature adjustment device or preheating system is used to keep the lubricating oil temperature within an appropriate range to avoid solidification caused by too low oil temperature;

3) Regularly clean the oil and dust on the surface of the equipment and check the lubrication system regularly to prevent impurities and pollutants from entering the lubrication system, ensure smooth pipelines, and prevent lubricating oil from solidifying in the pipelines and causing blockage;

4) According to the usage of the equipment, replace the lubricating oil regularly. This can prevent the lubricating oil from aging, being contaminated or mixed with impurities, and maintain its good lubrication performance and fluidity.

2. Solve the hardening and wear problems of lubricating components

In low-temperature environments, the brittleness of materials increases, which can easily lead to hardening and wear of lubricating components, such as bearings, gears, bearing bushes, etc. This not only affects the normal operation of the equipment but may also cause malfunctions and even interrupt production. Therefore, we must attach great importance to the maintenance of lubricated components in low-temperature environments.

For the hardening and wear challenges of lubricated components, the following solutions may be considered:

(1). Lubrication and cooling: Ensure that the lubricating components of the equipment are fully lubricated during operation to reduce friction and wear. In addition, in low-temperature environments, the selection and supply of lubricating oil should be appropriately adjusted to ensure the lubrication effect.

(2). Regular maintenance and replacement: Regular inspection, cleaning and maintenance of lubricating components. According to the usage and wear degree, damaged or severely worn lubricating components should be replaced in time to ensure the normal operation of the equipment. At the same time, sufficient spare parts should be stored in advance to ensure timely supply when lubricating components need to be replaced. In addition, according to the operating conditions of the equipment, promptly adjust the position of the lubricating parts and the tightness of the fasteners to ensure that they are in good working condition.

(3). Choose high-quality products and services: Choosing strictly verified lubricating component products can provide stable support for mining equipment under harsh conditions and ensure production continuity and stability. At the same time, choosing a professional mining equipment maintenance and maintenance service team can provide comprehensive technical support and guarantee.

3. Solving difficulties in starting equipment

In low-temperature environments, mining equipment often faces huge challenges during the start-up phase, mainly due to several key factors: the significant increase in lubricating oil viscosity and the too-low temperature of the motor, resulting in a significant increase in resistance when the equipment is started, thus causing It is difficult for the equipment to start and operate normally, which not only affects production efficiency and equipment performance but may also increase maintenance costs and safety risks.

The following are several solutions to the problem of difficulty in starting mining equipment in low-temperature environments:

(1). Select lubricating oil suitable for low-temperature environments to ensure that key parts of the equipment are well lubricated and effectively reduce the friction resistance of key parts of the equipment, thereby ensuring smooth start-up and operation of the equipment;

(2). In a low-temperature environment, too low a temperature of the motor may cause startup failure. The motor can be preheated in advance to reach a suitable operating temperature to ensure that the equipment can start smoothly.

(3). Install heating equipment or use insulation measures to increase the overall temperature of the equipment and reduce starting resistance. These measures will help reduce the viscosity of the lubricating oil and ensure that the motor operates at a suitable temperature.

Facing the challenge of low-temperature environments, mining equipment will always encounter many problems, but as long as we adopt professional solutions, we can easily solve these problems. Through professional and reasonable operation and maintenance, we ensure that mining equipment can successfully cope with various extreme conditions and maintain stable and efficient operation, providing solid technical support and guaranteeing the continuous and safe production of mines.

What is the Sand Production Rate of Granite Sand Making? How is the Granite Sand Making Production Line Configured?

 Granite is a hard igneous rock, mainly composed of quartz, feldspar, mica and other minerals. Its Moh's hardness is 5-7 with high strength, corrosion resistance, wear resistance and other properties. After sand making treatment, granite can be made into sand with excellent grain shape and uniform particle size. This kind of sand is an important construction material that can meet the demand for high-quality aggregates in engineering construction and also provides a reliable material basis for various engineering projects. In this article, we will discuss sand production rates, influencing factors, and typical production line configurations for granite sand production.

1. Sand production rate and influencing factors of granite sand making

The sand production rate of granite sand making is mainly affected by factors such as rock properties, rock size, crushing methods, and sand making equipment. According to relevant literature reports, the sand production rate of granite sand making is generally between 30% and 50%, that is, each ton of granite can produce 0.3-0.5 tons of sand. However, actual sand production rates may vary due to various factors.

Among them, the properties of rocks such as hardness and toughness have a great influence on the sand production rate, while the crushing method and sand making equipment can increase the sand production rate by selecting appropriate models and parameters.

(1) . Hardness and toughness

Generally speaking, the higher the hardness of granite, the more difficult it is to crush with the relatively low sand production rate. The harder and less tough granite is easier to crush with the relatively high sand production rate.

(2) . Rock size

The size of the rock is an important factor affecting the sand production rate. Generally, the larger the particle size of granite, the more difficult it is to crush. It requires greater crushing force and grinding force to crush it into sand and with a relatively low sand production rate. If with too large granite particles, it will increase equipment wear and energy consumption and reduce production efficiency. Therefore, in the process of making granite sand, granite of appropriate size needs to be selected as raw material according to the actual situation.

(3) . Other mineral content

The content of other minerals in granite will also affect the sand making effect. For example, if it contains higher amounts of mica, feldspar, quartz and other minerals, it may reduce the sand production rate.

2. Granite sand making production line configuration

The granite sand making production line configuration usually includes a feeder, vibrating screen, jaw crusher, cone crusher, sand making machine, sand washing machine and other equipment. When configuring the granite sand making production line, it needs to be based on the capacity requirements, raw material characteristics, product requirements and other circumstances to select the appropriate equipment model. For example: for projects with small capacity and small material particle size, you can choose a fine jaw crusher to replace the cone crusher for secondary and tertiary crushing for medium and fine crushing; For projects with large capacity, then a cone crusher is needed to meet the capacity of thousands of tons/hour. Of course, budget is also an important factor to consider when configuring a granite sand making production line. If the budget is insufficient, other configurations can be selected to meet production needs.

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In the granite sand making production line, it also needs to be reasonably laid out. More crushing and less grinding links can be set up according to the actual situation. Production efficiency can be improved by adding equipment such as crushing equipment and fine sand recycling devices to achieve efficient and stable production. The specific configuration needs to be adjusted according to the actual situation. For example, if you need to produce finer sand, you may need to add sand making and sand washing links; If you need to increase the sand production rate, you may need to add crushing and sand making links. In addition, depending on the production scale and operation mode, fixed or mobile sand making machines can be selected to meet different production needs.

To sum up, when designing a granite sand making production line, you need to pay attention to several key points, including understanding the characteristics of granite, determining capacity, optimizing the process, selecting appropriate equipment, considering environmental protection factors, ensuring production safety, and considering investment costs and returns, etc. Reasonable equipment selection and parameter settings can increase the sand production rate, reduce production costs, improve production efficiency, and achieve the goal of sustainable development. Therefore, when designing and constructing a granite sand making production line, various factors should be fully considered and appropriate equipment models and parameters should be selected to achieve good production results.