There is Serious Sand Loss in the Sand Washing Production Line. How to Remedy it?

 As we all know, among the reasonable and environmentally friendly configuration methods of the entire sand making production line, it is a popular trend to equip pulse dust collector and water-washed sand washing machine. In the wastewater of wet sand washing, fine and powdered sand is inevitably lost in the water flow. Each production line loses about 5%-25% of the content. Calculating the loss in a year is also very alarming. If these lost parts are collected back, this part of the profit will also be very considerable. This article shares four methods of fine sand recycling.

Sand washing machine classification

Sand washing machines are divided into wheel sand washing machine and spiral sand washing machine. Wheel sand washing machine is widely used for washing and classifying materials in mining, building materials, chemical industry, transportation, concrete mixing stations and other fields. The sand washing process is a circular motion. Spiral sand washing equipment uses the propelling action of spiral blades to clean soil. Compared with wheel sand washing machines, spiral sand washing machines have a higher cleaning efficiency and better cleaning effects on stones. In the same way, the different specific gravity of sand, mud, and water are used to extract the sand, and the water and mud flow away along the chute.

However, no matter which type of sand washing machine is used, in the process of stirring the water source, most of the sand will inevitably be picked up, and the separation will not be clear and it will flow away along the sink. Then it inevitably caused most of the losses.

Four methods of fine sand recycling

1. Multi-stage sedimentation tank sedimentation method

The sand washing wastewater flows into the sedimentation tank, which is preferably equipped with 3 layers. It will settle layer by layer over time. Since the specific gravity of sand and mud is relatively heavy, they can be separated after a relatively long time.

Of course, this method also has disadvantages. The long-term sedimentation process takes up a large area of the sedimentation tank. In the later stage, manual excavation of sedimented sand and sedimentary mud is required, which consumes lots of time and manpower.

2. Equipped with dewatering screen equipment

Discharge the sand washing wastewater directly onto the linear dewatering screen surface to recover the lost sand.

The disadvantage is that if the raw material contains little or no mud, there will be no problem. However, if it contains too much mud, the last step will be useless and the recycling effect will not be achieved at all. What is recycled is still a mixture of sediment and sand.

3. Fine sand recycling machine device recovery

Drain the sand washing wastewater directly into the lower water tank of the fine sand collector. Use a slurry pump to pump the mixed sand and mud water to the cyclone separator and then discharge it to the screen surface. The fine sand part is discharged along with the screen surface, and the mud and water flow back to the sewer tank, forming a cycle to continuously extract sand from the wastewater.

No other faulty or theoretical problems have been found yet, and this fine sand recycling device is relatively recognized on the market.

Two points should be paid attention to when operating the fine recycling machine: first, do not feed materials when starting up. It is recommended to feed materials after idling for a few turns. This is more reasonable and can also reduce the burden on the equipment; Second, the overall power must be taken into consideration when configuring the transformer. Configure more voltage appropriately to ensure that the equipment can work normally and will not operate at low voltage.

4. Add chemicals

Discharge the lost sand water into the sinking tank, and add a chemical agent that can cause the mud and sand to quickly condense into floc, thereby achieving rapid separation of sand, mud and water. However, this method is mostly used in the coal slime industry to recycle clean and fine coal. Its use in sand and gravel quarries has certain limitations and cannot be popularized for the time being.

What's the Difference Between the Spiral Sand Washing Machine and the Wheel Sand Washing Machine?

 Sand washing is the last process of the sand production line. The quality of the machine-made sand is better and cleaner after being cleaned by the sand washing machine. Therefore, the choice of sand washing machine is also particularly important. There are two types of common sand washing machine: spiral sand washing machine and wheel sand washing machine in the market. What is the difference between these two devices? Which sand washing machine is the best device?

Spiral sand washing machine and wheel sand washing machine are common washing equipment, and the differences between the two are:

1. Different composition structure

The composition of the spiral sand washing machine mainly includes the following parts:

1) Spiral shaft: The spiral blade is fixed on the spiral shaft, and the spiral shaft will drive the spiral blade to rotate.

2) Spiral blade: The spiral blade is located on the spiral shaft, and the sand and gravel materials are cleaned and screened by rotation.

3) Drive device: Drive the spiral shaft to rotate and drive the spiral blade to clean and screen.

The composition of the wheel sand washing machine mainly includes the following parts:

1) Drive device: Drive the wheel barrel to rotate and drive the sand and gravel to rotate.

2) Wheel barrel: Equipped with blades, through the role of rotation and liquid to clean sand and gravel, to achieve the effect of clean and screen.

3) Speed reducer: Reduce the speed of the drive wheel barrel to meet the production needs.

4) Spray pipe: Spray water flow and cleaning agent into the wheel barrel to assist in cleaning and screening.

2. Different application occasions

The spiral sand washing machine is suitable for processing sand and gravel materials with high mud content, strong viscosity, or different particle thicknesses. Compared with other sand washing equipment, the spiral sand washing machine has a simple structure and a stable operation structure, which can effectively solve the problems of large viscosity and high mud content of sand and gravel materials. At the same time, it has the advantages of high-efficient, low energy consumption and a small occupied area.

Wheel sand washing machine is suitable for processing sand and gravel containing a lot of fine powder and weak viscosity, such as river sand, sea sand, etc. Compared with other sand washing equipment, the wheel sand washing machine has the advantages of simple operation, good cleaning effect, wide cleaning range, and environmental protection of energy-saving. At the same time, it can be unattended to achieve continuous operation with high-efficiency production.

3. The Different effects of washing sand

The spiral sand washing machine is suitable for processing relatively small particles of sand and gravel, which can be graded and screened by the rotation and pushing action of the spiral blade.

The wheel sand washing machine's sand washing effect is relatively thorough, which is suitable for processing large particles of sand and gravel. It uses the high-speed rotating wheel to generate strong collision and impact force, which can effectively remove the attached substances on the surface of the sand and gravel materials, and can also realize the separation and classification of sand and gravel materials.

Spiral sand washing machine and wheel sand washing machine have their own applicable scenarios and advantages, can not generalize which is better, the specific choice should be judged according to the actual situation and needs, you can refer to the following aspects:

1. Equipment price and cost of maintenance:

Spiral sand washing machine: The general price of the spiral sand washing machine is relatively high with stable operation, simple structure, easily maintain, durability, high cleaning rate, and less sand loss.

Wheel sand washing machine: The wheel sand washing machine is usually relatively cheap with relatively convenient maintenance. The impeller has a reasonable design, reasonable structure, high cleanliness, large processing capacity and low power consumption. The entire transmission device (including bearings) is isolated from water and water-bearing materials to avoid damage caused by immersion, sand and pollutants. The screen made of wear-resistant materials has a long service life, and there are basically no other wear parts except the screen.

2. Efficiency of work and processing capacity requirements:

Spiral sand washing machine: The working efficiency of the spiral sand washing machine is relatively high. It is mainly suitable for processing fine-grained sand and gravel. It is usually suitable for large and medium-sized production lines or scenes with high processing capacity requirements. Generally, it is tens of tons per hour to hundreds of tons /hour. It is suitable for large-scale or medium-sized sand and gravel treatment projects.

Wheel sand washing machine: The working efficiency of the wheel-type sand washing machine is low, and it can handle fine and coarse sand and gravel. Usually, the processing capacity is smaller. It is suitable for larger production lines or occasions that require high processing capacity from several ten tons/hour to hundreds of tons/hour. It is suitable for handling large and medium-sized sand and gravel treatment projects or large and medium-volume sand and gravel cleaning needs in industrial production.

3. Special working conditions:

Spiral sand washing machine: Under special working conditions, the spiral sand washing machine has a better effect for processing sand and gravel materials containing higher viscosity and cleaning sand and gravel containing organic substances,

Wheel sand washing machine: Under special working conditions, the wheel sand washing machine is more suitable for processing sand and gravel materials with higher humidity and cleaning sand and gravel containing oil-immersed substances, such as petroleum residue and oil sludge.

To sum up, in general, the two have their own characteristics and different use occasions. We recommend that users should consider the specific needs, characteristics of sand and gravel materials, treatment scope, budget and work efficiency when choosing a sand washing machine. Vanguard Machinery is a professional mining machinery manufacturer with excellent equipment and perfect after-sales quality, we can tailor equipment solutions for you to meet your specific needs.