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.

Impact Crusher Operation and Maintenance Guide: From Precautions to Particle Size Adjustment

 The impact crusher is a machine that uses impact energy to crush materials. Its working principle is mainly to drive the movement of the flat hammer through the rotation of the rotor, so that the materials are subject to impact, collision, friction and other forces in the crushing cavity, thereby achieving crushing. This article will introduce the operating precautions and particle size adjustment of the impact crusher for your reference.

Precautions for operating the impact crusher:

1. When in the operation of the impact crusher, the material feeding must be uniform and cannot segregate. Otherwise, problems such as reduced capacity, excessive mechanical granularity, frequent spring movements, and increased power consumption will occur.

2. Lubricating grease should be injected regularly and should not be too dirty. Too dirty will accelerate the wear of bearings and even cause the bearings to lock up.

3. During the no-load running test, the machine is required to run smoothly without abnormal vibration or noise.

4. The feeding material should not be too sticky, and the fine particles should not be too many or too large, otherwise it will cause a blocking run. The reduction ratio distribution in the production line must be correct so that the impact crusher can maximize its effectiveness.

5. Feeding can only be done after the impact crusher is running normally, and the feeding should be uniform; Feeding must be stopped before shutting down; Stop the motor after the material is crushed during shutdown.

6. According to the specific conditions of the site, protective equipment should be installed on the V-belt before operation. Repairs and cleaning are not allowed while the impact crusher is in operation, and it is strictly prohibited to open various small doors. The machine should rotate in a fixed direction and should not rotate in the opposite direction.

7. When the impact crusher is running, if any abnormality is found, it should be stopped immediately for inspection and troubleshooting. The work site must not be stacked with debris and must have adequate light and lighting equipment.

8. When checking the running direction of the rotor, you can observe the running direction of the pulley. Normally, the pulley runs in a clockwise direction; If the impact crusher is installed on the other side, the running direction of the pulley is counterclockwise. If not, it should be adjusted the motor wiring.

9. Check whether the bearing seat seal is in good condition frequently, and the grease in the bearing seat should be refilled every 3-5 days.

10. When checking whether the fasteners are loose, you should focus on checking the pressure plate screws on both sides of the rotor that hold down the flat hammer to prevent the flat hammer from loosening and exposing the rotor body at both ends of the plate hammer, colliding with the machine body and damaging the machine parts.

11. In order to ensure the safety of operators and equipment, repair, adjustment and cleaning are prohibited while the machine is in operation, and it is prohibited to open various small doors. When the particle size of the crushed product is too large, the machine should be stopped to check the wear of the flat hammer to prevent the rotor from being worn. When the flat hammer needs to be adjusted 180° for reuse due to wear, the weight of each flat hammer should be equal and balanced to prevent vibration after the machine is started.

12. After each use, promptly clean the residual materials in the crushing cavity, especially fine particles and dust, to ensure that there is no blockage or adhesion inside the equipment. Lubricate the rotating and sliding contact surfaces regularly to prevent wear. In addition, regular inspections are carried out on key parts and any abnormalities are dealt with in a timely manner.

13. Keep detailed records of equipment operating conditions, maintenance history, etc., including operating time, temperature, vibration conditions, lubricating oil replacement intervals, etc., to provide reference for subsequent repairs and maintenance. If there is a fault or abnormal situation, report it and record it in time to facilitate maintenance and troubleshooting by professionals. At the same time, maintain good communication with maintenance personnel to understand the current status and potential problem points of the equipment.

Impact crusher particle size adjustment method:

1. Adjust the rotation speed of the rotor: By adjusting the rotation speed of the motor or the ratio of the transmission pulley, the rotation speed of the rotor can be changed. A higher speed can increase the number of impacts of the material in the crushing cavity and improve the crushing efficiency, but it will also shorten the residence time of the material in the crushing cavity, which may lead to larger particle size. This method can be implemented by replacing pulleys and frequency converters, but with the relatively high cost. In actual operation, comprehensive considerations need to be made based on actual needs, and the appropriate particle size can be obtained by adjusting the rotation speed of the rotor.

2.Change the cavity type and quantity: Impact crushers are usually divided into two-cavity and three-cavity series. Changing the cavity type and quantity can change the movement trajectory and degree of crushing of materials in the crushing cavity. Different cavity types will have different guiding effects on the movement of materials in the crushing cavity. The more cavity types, the more impacts and collisions the material will receive during the crushing process, which will help improve the crushing effect. However, too many impact racks may also cause materials to stay in the crushing cavity for too long, increasing equipment wear and energy consumption. Through reasonable design and adjustment, the crushing effect and efficiency of the impact crusher can be improved.

3. Adjust the clearance between the impact plate and the flat hammer: The size of the clearance between the impact plate and the flat hammer determines the impact force and number of collisions the material receives in the crushing cavity. Reducing the clearance will subject the material to greater impact, helping to crush harder materials, but it will also increase wear and vibration. Therefore, the clearance size needs to be reasonably adjusted according to the properties and particle size requirements of the material. Specific adjustment methods may vary depending on the device model and should be performed under the device manufacturer's instructions.

In summary, in actual operation, the equipment manufacturer's recommendations and operating procedures should be followed according to the actual situation, and regular maintenance and inspections should be carried out to ensure the normal operation of the equipment and obtain good granularity effects.