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Raymond Mill for Black Mica

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Raymond Mill for Black Mica



Black mica is characteristic of insulation, high temperature resistance, luster, stable physical and chemical properties, good thermal insulation, elasticity and toughness. After black mica is processed, it also has good smoothness and strong adhesion.


Due to the performances of mica and mica powders, black mica can be applied as chemical raw materials in daily life, raw materials of mica ceramic, paint additives, plastic, rubber additives, building materials, protective layers for electrode coatings, mud additives for drilling, etc.

It is necessary to use grinding mill to deeply process black mica due to  its wide application. HC Milling (Guilin Hongcheng), a well-known manufacturer of grinding mill, not only can provide grinding mill for black mica, but also can provide a complete set of production line of black mica powders. In addition, we can conduct the project of engineering procurement construction according to customer requirements and ensure that the customer’s production line of black mica can be put into production quickly.

The process of the preparation of black mica

The first stage:

Coarsely crush the black mica

The first process is to crush black mica. After the black mica is selected, it is coarsely crushed into small stones30mm which are suitable for the feeding size of grinding mill, and then they are transported to the supply hopper for raw material by a special vehicle.

The second stage:


After the black mica is dried, it is lifted by the bucket elevator to the storage hopper. And materials fall from the storage hopper. Then the feeder feeds materials into the main machine evenly.

The third stage:


 After the qualified black mica powders are classified, they will enter into the collector through the pipeline. And those powders discharged from the powder-discharging tube are called the finished products. However, the unqualified products fall down into the main mill to regrind.

The fourth stage:

The collection of finished product

The qualified powders enter into the collector through the pipeline with wind and then they are separated and collected. The collected calcined coke powders are discharged through the discharge port, and then they are conveyed to the hopper of finished product by the conveyor device. Finally, they are uniformly packed by the powder tank or automatically packaged by the packaging machine.

#HC  #HCMilling  #GuilinHongcheng

Roller number: 3-5

Maximum feeding size: 30mm

Output: 1-25t/h

Fineness of finished product : 0.022-0.18mm

Applicable materials:

It is suitable for the processing of non-metallic minerals such as bauxite, titanium dioxide, ilmenite, phosphate rock, clay, graphite, calcium carbonate, barite, calcite, gypsum, dolomite and potash feldspar, etc. Fineness of finished product can be freely adjusted.


This kind of grinding mill has effectively improved the capacity per unit of a single machine and reduced the energy consumption per unit. Additionally, it is characteristic of wide application, easy operation, easy maintenance, stable performance, high efficiency, environmental protection and high price-performance ratio and promising market.

Thanks to its covering of many technological patents, the output of this kind of machine can be increased by more than 40%. And under the same electric power, the cost of power consumption per unit can be saved by more than 30% in contrast with the R-series grinding mill. It is a better choice to process powders with a fineness of 80-600 meshes due to a great improvement in various performances.


The daily inspection items of the milling machine:

1. Regularly listening to the normal operation sound of the mill and the classifier, and whether there is any abnormal sound.

2. Checking if the reducer and other equipment has any oil leakage, water leakage or material leakage.

3. Checking the wear of the tie rod seal every month.

4. Regularly check the function of the scraper and returning system.

5. Checking the pumping station every day, including: oil level of the fuel tank and refueling if necessary. The oil should be in accordance with the specified oil; check the pressure of each pressure gauge; check whether the filters are blocked.

6. Checking the oil return condition of the grinding roller lubrication station and whether the oil filling pressure is normal.

7. Always check the oil pipes and valves for oil leakage.

8. Measuring the wear of the grinding disc and the grinding roller liner each 1000H, and make a record.

9. Checking the pressure of the accumulator once a week.

10. Regularly check the center frame, nozzle ring, air guiding vane, water spray pipe and other grinding accessories.



Grinding Mill maintenance:

1. There should be a fixed person responsible for operation in using process, the operator must equipped with professional technical knowledge. Before the installation, the operator must carry out the necessary technical training to understand the principle performance of the mill and familiar with the operating procedures.

2. In order to keep the mill in good condition, the "safe operation system for equipment maintenance" should be established, and necessary maintenance tools as well as grease and corresponding accessories should be provided.


3. After using the grinding machine for a period of time, it should be repaired and maintained. Meanwhile, the wearing parts such as grinding rolls, grinding rings and blades should be repaired and replaced. The grinding roller device should be carefully check the connection bolt nut before use and after, see if there is looseness, whether the grease is sufficient. The refueling tools are available with manual refueling pumps and grease guns.


4. The grinding roller device of the mill needs to be replaced after using for more than 500 hours. When the grinding rolls are replaced, the rolling bearings in the sleeve must be cleaned.


5. According to the size of the material, soft and hard, water content, specific gravity, the processing thickness is also different. The analyzer of the mill, high speed, high fineness, low speed and low fineness can be adjusted. Increase the fineness and the output will be reduced accordingly. If the requirements are not met, the fan speed should be debugged and the user can flexibly master it.


6. The scrapping limit of the grinding roller ring of the mill, the remaining minimum wall thickness shall not be less than 10mm.


7. The feed should be stopped when the mill stops, and the main machine continues to grind. The motor of the main unit and the motor of the analyzer can be turned off to stop the grinding work after about one minute. After that, the blower motor is stopped to purge the remaining powder.

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