LYH998 4 Roller Raymond Grinding Pendulum Mill

The raymond grinding mill is mainly suitable for grinding processing of metallurgy, building materials, chemical industry, mining and other mineral materials. It can grind limestone, calcite, calcium oxide, calcium hydroxide, quartz, feldspar, talcum, barite, fluorite, rare earth, marble, ceramic, bauxite, manganese ore, iron ore, copper ore, phosphate ore, iron oxide red, zircon sand, slag, water granulated slag, cement clinker, activated carbon, dolomite, granite, garnet, Iron oxide yellow, soybean cake, chemical fertilizer, compound fertilizer, fly ash, bituminous coal, coking coal, lignite, rhodochrosite, chromium oxide green, gold, red mud, clay, kaolin, coke, gangue, china clay, bluestone, fluorite, bentonite, medical stone, rhyolite, greenstone, pyrophyllite, shale, purple sands, chlorite, multiple rocks, basalt, gypsum, graphite, silicon carbide, thermal insulation materials and all kinds of non-flammable and explosive mineral materials which Moh's hardness is below 7 grade and water content below 6%. The granularity of the finished product can be adjusted between 0.25 and 0.023 millimeters (equivalent to 60 mesh and 600 mesh) according to different requirements.

It is particularly effective for grinding materials such as coal, talc, gypsum, and other minerals to fine powders.

Main Uses:

Raymond Coal Mill: Ideal for power plants, the Raymond coal mill efficiently grinds coal to the desired particle size, ensuring optimal combustion efficiency and reduced emissions.

Raymond Mill for Talc Powder Production: This specialized mill is designed to produce high-quality talc powder, widely used in cosmetics, pharmaceuticals, and other industries.

High-Capacity Gypsum Raymond Grinding Mill: For large-scale gypsum processing, this high-capacity mill delivers exceptional performance and productivity.

1. Using an air lock feeder to ensure a sealing effect and achieve uniform feeding speed. Adopting a feeding plastic sealing feeder, it not only achieves packaging sealing effect but also achieves uniform feeding speed

2. The new system adopts a type separator, so the precision of powder selection and the stability of fineness are greatly improved. The output is increased by 20-30% under the same fineness as that of the mill with blade blade-type separator.

3. There are two kinds of driving methods forLYH998 series new type of intelligent Raymond grinding mill. One is the bevel gear integral drive, which is more compact in structure, more convenient, and quicker in installation and adjustment, and the efficiency is greatly increased. The drive gearbox adopts an internal oil pump, no need to add another oil pump or lubrication station, to realize the lubrication of the main shaft bearings and bevel pinion shaft bearings. This driving method is patented by our company. The other driving method is the reducer drive. The reducer is upgraded with German Flender reducer technology, the output torque is large, stable, and reliable, the bearing adopts forced lubrication, and the cooling system adopts the air-cooled cooling system.

4. Curved air duct design, smooth tangential airflow inlet, low resistance, internal outlet direction conducive to material dispersion, less prone to material blockage

5. The scraper blade of the LYH998 series new type environmental grinding mill adopts high wear-resistant alloy material, which has a long service life and only needs the blade part when replaced, which improves the material utilization rate. In addition, when using the traditional plane-type scraper, the material is shoveled up and piled up in a level, so that the middle parts of the grinding roller and grinding ring wear seriously. But curved-type scraper can guide the material to the vertical surface so that the material can be ground by the upper, middle, and lower parts of the grinding roller and grinding ring uniformly. It also increases the effective working area, thus increasing the output.

6. An isolated cyclone powder collector makes the rotational speed more precise, the fine material separation better, and the efficiency of the powder selection greatly improved to 80~85%. The isolation structure is used between the inner cylinder and the mixture powder flow, which can effectively improve the efficiency of powder selection and the precision of powder selection.

7. Non-resistance air inlet snail shell (small observation door without eddy current): the inner surface of the internal door plate of the traditional mill air inlet snail shell observation door protrudes outward, which is not on the same plane with the air inlet snail shell inner surface, is easily occurring eddy current effect to increase system energy consumption. The inner surface of the internal door plate ofLYH998 series new type intelligent Raymond grinding mill and the air inlet snail shell inner surface are on the same curved surface, so that it can effectively avoid the eddy current effect. The imported wear-resistant steel used in the plate has quite high mechanical strength, and its mechanical properties are 3 times to 5 times that of ordinary low alloy steel plate, which can significantly improve the wear resistance of the shell, thus improving the service life of the machine. High-quality and thick air duct protective plate.

8. The use of computer-integrated control equipment operation is easier (a key start-stop), to reduce the labor intensity of workers. At the same time, it can ensure that the raw material is fed at a uniform speed, to avoid and reduce the collision of grinding rollers and grinding rings, to extend the service life of the machine. In addition, the computer automatic alarms and shutdowns if there is a computer control system failure, to reduce the damage to the machine and the troubleshooting time. Computer control can maximize production and significantly improve efficiency. Product quality is fully guaranteed, thus bringing objective profits to the company.

9. The pulse dust collector forms a true negative pressure operating system, with no dust overflow, improving the environmental conditions of the production area and contributing to the environmental protection cause

Clean and standardized production workshop, strictly controlling the quality of every step of production, from batching, welding, processing, equipment, and painting, to packaging, striving for excellence in every link, controlling details, pursuing quality, and widely used in thousands of grinding production lines.

1. Preparation matters before installation of the grinding mill

a. When the mill is transported to the site and not yet installed, it should be properly stored, and the exposed surfaces should be coated with rust-proof grease and avoid sunshine and rain, so as to prevent the machine body from rusting and watering.

b. If it exceeds 6 months from the grinding mill leaving the factory to putting it into use, the main machine center shaft system, drive device, grinding roller device, separator, etc. should be cleaned and inspected, and add enough lubricating oil to each component.

c. The foundation of the main machine, main fan, jaw crusher, and bucket elevator shall bethe prefabricated reinforced concrete foundation.

d. The surface of the foundation should be leveled with a leveling ruler, and the depth of the concrete should be at least 100-200mm deeper than the corresponding holes of the foundation bolts, which should be determined according to the local soil quality and climate.

e. Reserve 100-150mm wide secondary grouting slots at the location of the foundation bolt holes.

f. Add a water pit and make the ladder at the appropriate location of the pit.

g. The upper surface of pre-embedded iron and the ground level should be on the same plane. The welding of pre-embedded iron should be solid and reliable.

 2. Grinding mill installation

 a. Install the main machine first, then correct the drive device to ensure that the large pulley of the main machine and the belt pulley of the main motor are aligned and parallel to the center line, and ensure the pre-tensioning force of the belt to prevent slipping and belt burning.

 b. During installation, it must ensure that the large pulley of the separator and the belt pulley of the separator motor are aligned and the center line is parallel, and ensure the pre-tensioning force of the belt to prevent slipping and belt burning. 

 c. On-site installation of pipeline, the connection between the components should be added sealing gasket. Never allow the air leakage phenomenon to affect the output. Seven high-temperature resistant sealing processes, capable of withstanding high pressure, strong operational toughness, can work in environments up to 200 degrees Celsius, have chemical stability and corrosion resistance, and can be used in some special industrial applications.

d. If two components can not be correctly matched due to the foundation error and manufacturing error, they should be connected after local repair.

3. Grinding mill debugging (no load test running: the operating parts must be fully lubricated before the test running to avoid damage to the running parts)

a.Before the load test running, clean up the impurities inside the grinding chamber and pipelines to avoid damage to the operating parts, and then the no-load test running of the main machine should not be less than 1 hour. When the machine is running smoothly, the oil temperature in the box shall not exceed 80 ℃, the temperature rise shall not exceed 40 ℃.

b.The main fan should be started with no load, and load under normal operation, and then observe its smooth operation with no abnormal noise and vibration. The maximum temperature of rolling bearings shall not exceed 70 ℃, and the temperature rise shall not exceed 35 ℃.

c.Load test running time should not be less than 8 hours. After the grinding mill works normally without abnormal noise and no air leakage phenomenon of the pipeline connections, tighten the fasteners again, thus the grinding mill can be put into normal use.

d.The test running time of the powder separator shall not be less than 8 to 12 hours. The test running shall be carried out gradually from low speed to high speed. The temperature rise of the bearing parts shall be noted during operation.

e.During the initial operation of the grinding mill for 200, 500, and 800 hours, check and tighten the nuts of the operating parts in time to prevent loosening (such as all the foundation bolts and connecting bolts).

Before starting the grinding mill, check whether all inspection doors are closed tightly. Start the grinding mill in the following order: (under normal conditions, it is recommended to use the computer's one-key start-stop function)

1. Start the finished product elevator;

2. Start the finished product screw conveyor;

3. Start the dust filter;

4. Start the powder separator, and adjust the speed to the required speed according to the product fineness;

5. Start the centrifugal-induced draft fan (start with no load and load it after normal operation);

6. Start the main machine, to prevent the grinding roller and grinding ring from excessive wear and avoid excessive vibration of the machine, the no-load test running time of the main machine should not be more than 2 minutes.

7. Start the airlock feeder;

8. Start the belt feeder. At this time, the grinding work starts.

When stopping the machine, each piece of equipment should be shut down in the reverse order of starting.

1. Close the belt feeder at first to stop feeding.

2. Do not stop the main machine immediately, stop the motor of the main machine until the material is ground over (about two minutes). The material emptying is conducive to shortening the next host motor startup time of the main machine motor, to extend the service life of the motor.

3. After the main machine stops, stop the main motor after the residual powder inside the mill is blown.

4. Close the powder separator;

5. Close the dust filter.