Dry sand making production line What is the dry sand making process?

In the current limited mining of natural sand, machine-made sand will replace natural sand and gravel aggregates on a large scale In the context of the use of the construction industry, the processing technology of machine-made sand is particularly important, which will directly affect the quality of finished machine-made sand. What are the common sand making processes? How to choose the right sand making process according to your own situation, and what is the difference between different sand making processes?

First of all, we should understand the main sand making processes, including dry sand making, wet sand making, dry and wet integrated sand making, these three are the sand making processes commonly used in sand making. Secondly, we need to grasp the difference between them and how they apply:

1.Dry sand making.

From the name, we can clearly see that this sand making process does not use much water, and is suitable for areas with relatively drought and little rainfall. The specific processing process of dry sand making is as follows: raw material - > vibrating feeder (removal of soil waste) - > coarse crushing - > medium fine crushing - > screening (screening large aggregates) - > sand making - > screening (screening small aggregates) - > dust removal - > powder separation - > finished sand.

When discharging, the stone powder content in the machine-made sand can be adjusted by the separator to meet the standards of urban construction and hydropower engineering, and is used in construction projects, railways and other departments. The resulting fine powder can be used by dust removal and separators** for road bedding or slag brick raw materials. It can be seen that dry sand making can make full use of the discharged product.

2.Wet sand making.

The process of wet sand making and dry sand making is basically the same, but a large amount of water resources are required in the sand making process, so wet sand making is more suitable for rainy and abundant water resources. The specific processing process of wet sand making is as follows: raw material - > vibrating feeder (removal of soil waste) - > coarse crushing - > medium fine crushing - > screening (screening large aggregates) - > sand making - > screening (screening small aggregates) - > sand washing machine - > finished sand.

Compared with dry sand making, you will find that they only have a slight difference in the processing process, that is, the sand washing machine replaces the separator and dust collector, which requires a lot of water resources in the process, there is no dust pollution in the production environment, and the finished product is cleaner and better quality, but the output is lower.

3.Wet and dry integrated sand making.

After understanding the first two sand making processes, the dry and wet integrated sand making process is basically clear. That is, the dry sand making is combined with the wet sand making, and the aggregate is washed during the previous screening, and the finished sand part is no longer passed through the sand washing machine. This processing technology also requires a certain amount of water resources, and the cost of sand making is higher than that of dry sand making, and lower than that of wet sand making.

When choosing the sand making process, we should choose according to the requirements of the region, water resources, raw materials and discharge, but from the perspective of environment and cost, it is generally recommended to choose dry method, followed by dry and wet integration, and wet sand making. Water resources are the scarce resources in China, if the content of soil and organic matter can be controlled, the water content of the finished sand through dry sand production is low, the yield is high, and it is not affected by seasonal and other factors, it is a very popular sand making process when making sand. In addition, if you have any questions about manufactured sand processing and sand and gravel production line configuration, you can make specific inquiries.

Dry sand production line is a commonly used sand making process, which does not require water in the production and processing process, and the sand produced is of good quality, reasonable grading and solid quality.

Dry sand production line is a commonly used sand making process, which does not require water in the production and processing process, saves work links, has no sewage and sludge discharge, will not cause pollution to the environment, ecology, water flow, etc., has a good environmental protection effect, and has a low investment cost, and has a high popularity in the industry.

Dry sand making machine, dry sand making production line is a common sand making process, which does not require water in the production process and is fully enclosed production.

The most common production lines are dry processes.

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1. The amount of sand and gravel dust produced by dry sand making is relatively low, and the quality of sand and gravel is relatively high.

2. It gets rid of the geographical limitation of water sources and has relatively little environmental pollution.

3. The production line of dry floor sand making system is relatively short, and the site requirements are relatively small.

Dry sand production line reference.

Dry sand making, it is further launched on the basis of the traditional wet sand production line, because in the sand production process, the process of washing out the mud powder in the sand does not need water, so it is called the dry sand production line.

Its advantages are:

Not constrained by the environment. One is that it can be used for artificial sand production in areas where water resources are not abundant, and it is not restricted by regional water sources and environment. On the contrary, wet sand making must be carried out in areas with sufficient water resources, and the water in the northern region of our country is scarce in winter, and the sand produced does not have enough water source to clean, and the sand contains too much mud powder and stone powder, which greatly affects the gradation of sand.

The cost aspect can be reduced. Compared with the traditional wet sand production line, the dry production line does not need to use a large amount of water, which reduces the amount of water input to a certain extent, so that the investment in water will be reduced.

Good for the environment. The dry production line does not need a large amount of water to clean the sand like the wet sand production line, which saves water resources, and the stone powder produced in the production process can also be utilized, so that mineral resources are also saved.

Better improve the grading of artificial sand. The mud powder in the artificial sand can be removed by the separator to meet the specified standards of construction sand, and the content of stone powder in the artificial sand can also be controlled within the specified range by the separator, so as to improve the compressive strength of concrete and the workability of concrete.

Wet sand making, because we usually process the stone, due to the fierce collision and the stone itself has a certain soil content, it will make the machine-made sand have a certain amount of stone powder and mud powder. Mud powder has a serious impact on the quality of sand. Although the existence of stone powder can make up for the large gap caused by artificial sand in concrete, the configuration of concrete requires a large amount of water.

Therefore, in order to solve the problem of powder content of manufactured sand, a sand washing machine is usually equipped in the manufactured sand production line to remove the mud powder in the sand, so as to meet the construction sand standard, which is the wet sand production line.

Its advantages are:

It is more suitable in the southern region, which is rich in water resources.

A large amount of water is used for washing, and the production environment is free of dust and will not cause air pollution; The surface of the aggregate and fine sand produced is clean, and the appearance and texture are good.

Disadvantages: When choosing the wet process, it is necessary to be equipped with sand washing equipment, fine sand and sewage utilization equipment.

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Dry sand production line: get rid of environmental restrictions, production costs, gradation of artificial sand, more conducive to environmental protection, and not limited by water sources and environment. The dry sand making production line is equipped with a high-performance sand making and powder separator and a coarse and fine powder separator, which is energy-saving, environmentally friendly, occupies a small area, has a compact production line layout and a high degree of automation.

The dry sand making process is a more commonly used process type in the machine-made sand industry, and the sand produced is of excellent quality, reasonable grading, strong quality, beautiful particle shape, and the operation process is smoother, energy saving and consumption reduction, and green environmental protection.

Process characteristics of dry sand production line.

1. Fineness modulus and gradation area adjustment: The sand making machine and sand and gravel powder separator are equipped with a frequency conversion speed control system, which can adjust the production mode according to the characteristics of raw materials, so as to quickly and easily adjust the fineness modulus and stone powder content of the machine-made sand, which is the production process.

2. Adjustment of stone powder content (sand equivalent): adjust the stone powder content to the range of use requirements through the sand and gravel powder separator.

3. Good environmental performance: equipped with dust removal system, small dust, and noise less than 90db during operation.

4. It occupies a small area, the production line layout is compact, and the degree of automation is high: the plane covers an area of 35 meters and 20 meters, and only 2 staff members are needed for each shift of production and operation.

5. The process design is scientific and reasonable, and the quality and output of machine-made sand are carried out.

Dry sand production line is a commonly used sand making process, which does not require water in the production and processing process, saves work links, has no sewage and sludge discharge, will not cause pollution to the environment, ecology, water flow, etc., has a good environmental protection effect, and has a low investment cost, and has a high popularity in the industry.

First of all, the stone is preliminarily crushed by the coarse crusher, and the coarse material produced is transported to the fine crusher by the belt conveyor for further crushing, and the finely crushed stone enters the vibrating screen to screen out two kinds of stones, and the stones that meet the feed particle size of the sand making machine are fed into the sand making machine, and the other part is returned to the fine slope.

Part of the stones of the sand making machine are made into sand, which is cleaned by the sand washing machine (optional) to make finished sand, and the other part is crushed again by the sand making machine.

Manufactured sand production process.

The stone is evenly sent to the jaw crusher for coarse crushing by the vibrating feeder, the material after coarse crushing is sent to the impact crusher for crushing again, the crushed material is sent to the sand making machine by the belt conveyor for sand making, the sand and gravel material coming out of the sand making machine is screened by the vibrating screen, and the material that meets the requirements is the finished product, which falls into the finished sand pile by spraying dust reduction. If it does not meet the requirements, return to the sand making machine to re-make the sand and then go to the vibrating screen for screening. The dust generated in the vibrating screening process enters the pulse dust collector after passing through the separator.

Compared with the traditional wet production line, the dry sand production line has four advantages: it gets rid of environmental restrictions, reduces production costs, has better gradation of artificial sand, and is more conducive to environmental protection.

First of all, let's talk about why we have gotten rid of environmental restrictions, we have to consider a lot of traditional wet production lines, especially the limitations of water sources and environment, we must carry out machine-made sand in places with abundant water resources, and it is generally impossible to produce in the winter in the north, otherwise the sand produced does not have enough water source to clean, so that the sand contains too much mud powder and stone powder, which will seriously affect the gradation of sand. The dry sand production line is not limited by water source and environment.

Why do you say that production costs are reduced? The traditional wet production line needs a large amount of water to wash the sand while producing sand, which increases the investment of water resources to a certain extent, while the dry production line does not require investment in water, which reduces the investment of funds to a certain extent.

How to explain that the gradation of artificial sand is better? After passing the separator, the mud powder in the artificial sand can be removed to meet the standard of construction sand, and the stone powder content in the artificial sand can also be controlled within the national regulations by the separator, so as to improve the compressive strength of concrete and the workability of concrete. Therefore, the gradation of artificial sand is better than that of natural sand.

For environmental protection, the traditional wet production line production process requires a large amount of water to clean the sand, which is a waste of water resources from a certain point of view, and the washing of stone powder produced in the production process is also a waste of mineral resources. The dry method avoids this, so it saves water and mineral resources to a certain extent, and is more environmentally friendly than the wet production line.

Due to the fierce collision of the stone in the processing process, and the stone itself also contains soil, the machine-made sand contains a certain amount of mud powder and stone powder, which affects the gradation of the machine-made sand. In order to solve the problem of powder content in manufactured sand, the wet sand making process and the dry sand making process came into being.

The main advantages of dry sand making are:

1. The water content of the machine-made sand produced by dry sand making is generally less than 2%, and the commercial or dry mixed mortar can be used directly.

2. The content of stone powder in the finished sand can be controlled, which can be concentrated and utilized to reduce dust emissions.

3. The water resources used in the dry sand production process are less, and there is little or no water, which can save water resources.

4. Dry sand making is conducive to several operation controls and can realize automatic management.

5. It is not affected by geography, drought and cold season.

6. In the process of dry sand making, the cost of water resources is reduced, and it is not limited by the regional environment 7. The dry sand production line has a compact layout and a small footprint.

The power consumption of dry sand production line will be higher than that of wet sand making.