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What do you know about dolomite grinding mill?

Source: clirik   By Administrator   Posted: 2021-04-14   

What is dolomite used for?

Dolomite or Dolomite is a carbonate rock containing calcium and magnesium. Mainly composed of dolomite, containing a small amount of calcite, clay minerals, flint, magnesite, and sometimes gypsum, celestite, barite, pyrite and organic matter. The color of dolomite is generally off-white, similar in appearance to limestone. Between limestone and dolomite, some transitional types of ore can be divided according to the different ratios of calcite and dolomite. Generally called dolomite refers to the purer dolomite with a calcite content of less than 5%.


Dolomite can be used in building materials, ceramics, glass and refractory materials, chemical industry, agriculture, environmental protection, energy saving and other fields. It is mainly used as a flux for alkaline refractories and blast furnace ironmaking; production of calcium-magnesium phosphate fertilizers and preparation of magnesium sulfate; and ingredients for the production of glass and ceramics.


What is dolomite grinding mill?

CLIRIK HGM series micro-powder grinding machine is a professional dolomite grinding equipment, this  dolomite grinding mill has many advantages:

1. Low consumption. When the power and the fineness of the finished product are the same, the output of it is much higher than that of jet mill and stirring mill.

2. Its service life is longer.

3. The equipment is tight, and there are no detailed problems such as the fragility of bearings and seals.

4. The product has high fineness.

dolomite grinding mill


Dolomite grinding process:

Dolomite powder processing is generally divided into dolomite coarse powder processing (0-3MM), fine powder processing (20 mesh-400 mesh), and dolomite ultrafine powder deep processing (400 mesh-1250 mesh) and micro powder processing (1250 mesh) —3250 mesh) four types.


Stage 1: Broken
The bulk material of dolomite is crushed by the crusher to the fineness (15mm-50mm) that can enter the mill.


Stage 2: grinding
The crushed small dolomite materials are sent to the silo by the elevator, and then sent to the grinding chamber of the mill evenly and quantitatively by the vibrating feeder for grinding.

Fine powder processing generally uses LM vertical mill, MTW European version mill, 5X European version smart mill; ultrafine powder processing generally uses LUM ultrafine vertical mill, MW ring roller micro-pulverizer; sand or coarse powder CM European coarse powder mill and straight-through centrifugal mill are selected for processing.


Stage 3: Classification
The ground material is classified by the classifier, and the unqualified powder is classified by the classifier and then returned to the host for re-grinding.


stage 4: collecting fans
The powder that meets the fineness is separated and collected in the dust collector through the pipeline through the airflow. The collected product powder is sent to the finished product silo through the discharge port by the conveying device, and then is packaged by a powder tanker or an automatic baler.


The causes of gear damage in the dolomite grinding mill:

1. Because the transmission form of the dolomite grinding machine is rigid connection, the asynchronous motor realizes the rigidity through the elastic coupling and the gear shaft. In the case of iron or overload operation of the equipment, it is easy to cause the damage of the large and small gears. In addition, poor gear meshing is also one of the important reasons for the damage to the gears of the dolomite grinding mill. This is because, in the case of poor gear meshing, the tooth side clearance and the tooth tip clearance are not within the specified range, which causes the gear to be damaged in a short time.


2. When the dolomite pulverizer is crushing materials, there are unbreakable materials in the crushing cavity, such as iron impurities, etc., which will cause greater wear and tear on the components during the crushing process, especially the damage to the gears. At the same time, if the dolomite pulverizer is in an overloaded operation state for a long time, the crushed material will have a greater impact on the equipment, and proper protection measures cannot be taken, which will cause serious wear and even breakage of the gear.


3. Reasonable lubrication and maintenance work is an important factor to prevent damage to dolomite gears. Because, during the long-term operation of the dolomite grinding mill, if the lubricating oil is insufficient or the lubricating oil undergoes qualitative changes, it will affect the lubrication condition of the gears, thereby exacerbating gear damage. In the crushing production line, it is inevitable that impurities, etc. will form a certain degree of pollution on the gears, which will affect the operation of the equipment and the meshing between the gears, which will result in damage to the gears.


What are the reasons for the blockage of the Dolomite grinding mill production line?

1. The granularity of dolomite material is too large. In the dolomite milling production line, each type of dolomite milling equipment is equipped with a corresponding feeding device port that has corresponding feeding requirements. If the particle size of the dolomite material is too large, it exceeds the requirements of the feeding device Within the range, jamming will occur, which will affect the smooth progress of the next process of the milling operation.


2. Improper operation method. In order to increase the output of the dolomite milling production line, some users feed the equipment too fast and the feed amount is too large. In the case of uneven feeding, it is easy to cause the dolomite milling equipment to affect the material. The processing capacity cannot keep up with the feed rate, so that a large amount of dolomite materials accumulate in the grinding cavity, which increases the difficulty of the dolomite grinding production line, and it will inevitably cause blockage after a long time.


3. The blade is severely worn. In the production of dolomite flour, the main function of the shovel is to scoop up the material, and then throw it between the grinding roller and grinding ring through a set angle. In this process, the shovel is a component that directly contacts the material. If the shovel is severely worn, it will not be able to shovel and throw the material better. As a result, a large amount of material cannot be sufficiently ground, and the material is blocked.


4. The grinding roller and grinding ring are severely worn. When the equipment is in a high-load operation state for a long time, it is inevitable that the grinding roller and grinding ring will have different degrees of wear. Once the grinding roller and grinding ring are severely worn, the production capacity of the dolomite crusher will be greatly reduced, resulting in white clouds. The occurrence of blockage of the stone mill powder production line. 


In view of the above-mentioned various reasons, we must pay attention to the correct operation method in the production process of dolomite grinding powder, and do a good job of regular maintenance of the equipment, and discover and solve the problems of the equipment in time, so as to prevent the dolomite production line Blockage, improve the milling efficiency of the equipment.


What to do if the dolomite powder mill is abnormal?

First of all, the problem of powder should be investigated from its source, that is, the quality of dolomite raw materials. Good quality is relatively high in powder yield, so the quality of raw materials has a crucial impact on the finished product. The humidity of the raw materials It will also affect the powder output. The humidity is high, and it is easy to form lump during grinding, so that the grinding is not sufficient, the amount of powder output will be reduced, and the quality will be greatly reduced.


There is also the input of materials. The dolomite crushing equipment has a certain range of requirements for the input of materials. If the equipment is produced quickly and the powder is normal, the material must be put in a reasonable manner. Some users are eager to increase the output and blindly increase it. The injected materials cause a large amount of dolomite to pour into the grinding device, making it difficult to mix and grinding, and it will aggravate the wear of the grinding tools. Not only the output is not increased, but the equipment damage is more serious, and the gain is not worth the loss. 


The last thing to say is also more important. The dolomite crushing equipment is under negative pressure grinding when it is working. If the sealing is not good, changing the appropriate pressure for grinding will also have a greater impact on the powder output, and when the grinding device is severely worn. It should be replaced in time.