Raymond Roller Grinding Mill

What is Raymond Roller Grinding Mill?

What Materials Can Raymond Mill Grind?

Raymond mill can grind quartz, feldspar, calcite, talc, barite, fluorite, rare earth, marble, ceramics, bauxite, manganese ore, iron ore, copper ore, phosphate rock, iron oxide red, zircon sand, slag, water slag, cement clinker, activated carbon, granite, garnet, iron oxide yellow, soybean cake, chemical fertilizer, compound fertilizer, fly ash, bituminous coal, coking coal, lignite, Lingmei sand, chromium oxide green, gold mine, red mud, clay, kaolin Coke, coal gangue, porcelain clay, kyanite, fluorite, bentonite, Maifanshi rhyolite, pyrophyllite, shale, purple sandstone, chlorite, stromatolite, basalt, gypsum, graphite, silicon carbide, thermal insulation, materials, etc

Application of Raymond Mill

Raymond mill can be applied to Calcium carbonate crushing and processing, gypsum powder processing, power plant desulfurization, non-metallic ore milling, pulverized coal preparation, etc

Raymond Roller Mill Structure

The complete equipment of Raymond roller mill is composed of the main machine, reducer, analyzer, pipeline device, blower, dust collector, jaw crusher, bucket elevator, electromagnetic vibration feeder, electric control system, etc.

How does Raymond mill work?

Working principle of Raymond Mill:

In the Raymond mill, a Raymond mill spring with a pressure of 1000-1500 kg is fastened to the grinding roll hanger.

After starting work, the grinding roller rotates around the main shaft and rolls close to the grinding ring under the action of the Raymond mill spring and centrifugal force.

Its rolling pressure is 20% higher than that of Raymond mill under the same power conditions, so the output is greatly improved.

When the milled materials enter the grinding chamber, they are scooped up by the shovel and sent between the grinding roll and the grinding ring for rolling.

The rolled powder is brought into the analyzer with the circulating air of the blower.

The qualified fine powder flows into the cyclone powder collector with the air, which is the finished product.

Large particles are reground after falling behind.

The circulating air returns to the blower to repeat the above process, and the remaining air enters the bag filter.

When the grinding roll and ring are worn to a certain extent, adjust the length of Raymond mill spring to maintain a constant grinding pressure between the grinding roll and ring, so as to ensure stable output and fineness.

Parameters of Raymond Roller Grinding Mill

Advantages of Raymond Roller Mill

1. The whole machine is of vertical structure, with a small floor area and strong systematization. It can form an independent production system from the rough processing of raw materials to the transportation to the milling and final packaging.
2. Compared with other milling equipment, the screening rate is as high as 99%.
3. The transmission device of the Raymond mill main machine adopts a sealed gear box and pulley, which has stable transmission and reliable operation.
4. The important parts of the Raymond grinding mill are made of high-quality castings and profiles. The precise process and rigorous process ensure the durability of the whole set of equipment.
5. The electrical system adopts centralized control, and the grinding workshop can basically realize unmanned operation and maintenance.

What factors will affect the output of Raymond mill?

Important Factors Affecting the Production Capacity of Raymond Mill

1. The hardness of the material. The harder the material is, the more difficult it is to grind Raymond, and the more serious the wear and tear of the equipment. The speed of Raymond mill is slow, and of course, the milling capacity of Raymond is small.
2. The humidity of the material, that is, when the moisture content of the material is large, the material is easy to adhere in the Raymond mill, and it is also easy to block during the feeding and conveying process, resulting in the reduction of the Raymond milling capacity.
3. The fineness of the material after Raymond milling is required to be high, that is, the finer the material from Raymond milling is required, the smaller the Raymond milling capacity.
4. The composition of the material, the more fine powder contained in the material before the Raymond mill, the more it will affect the Raymond mill because these fine powders are easy to adhere to and affect the conveying. For the fine powder content, it should be sieved in advance.
5. The viscosity of the material. That is, the higher the viscosity of the material, the easier it is to adhere.
6. The better the wear resistance of the Raymond grinding parts (hammer head, jaw plate) of the Raymond mill, the greater the Raymond grinding ability. If it is not wear-resistant, it will affect the Raymond grinding ability.

How to operate a Raymond mill?

Before starting the Raymond mill in the Raymond mill workshop, check whether all inspection doors are tightly closed, check whether the gap between the palate plates of the crusher meets the size of the feed particle size, and adjust the rotation speed of the analyzer to meet the requirements of approximate finished product particle size. Finally power on in the following order.

Raymond mill boot sequence:

1. Start the bucket elevator;
2. Start the jaw crusher;
3. After the material is stored in the silo, start the analyzer;
4. Start the blower (start with no load, and then load it after normal operation);
5. Start the main engine of Raymond mill, and immediately start the electromagnetic vibrating feeder at the moment of starting the main engine. At this point, the Raymond mill grinding work begins.

The simple Raymond mill operation sequence is as follows:
Start: hoist → crusher → analyzer → fan → host → feeder. When the Raymond mill is stopped, the machines should be shut down in the following order:

Raymond mill shutdown sequence:

1. First, turn off the feeder to stop feeding;
2. Stop the host after about one minute;
3. Stop the blower after blowing off the remaining powder;
4. Finally shut down the analyzer.

The stop sequence of the simple Raymond mill is:
Feeder→Host→Blower→Analyzer. Note: After the elevator transports a certain amount of material to the silo, stop the crusher first and then stop the lifting. This item should be changed by the current storage amount.

Raymond mill is not allowed to refuel at will during normal operation. To ensure production safety, if abnormal noise occurs in any part of the mill, or the load suddenly increases, it should be stopped immediately for inspection and troubleshooting to avoid major accidents. The remaining material in the mill must be taken out when starting up again, otherwise, the current is too large when starting up, which will affect the start-up.