Ultrafine Raymond Mill History

Ultrafine Raymond Mill History

Raymond mill is a commonly used milling equipment, mainly used for barite, calcite, potassium feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock. , gypsum, glass, bluestone, petroleum coke, chemical raw material insulation materials, etc. Mohs hardness is not more than 9.3, humidity is below 6%, non-flammable and explosive minerals, chemicals, construction and other industries more than 280 kinds of materials Powder processing.

The history of Raymond Mill:

The Raymond mill structure is erected in the center of the machine with a rotating spindle with a plum blossom frame. Three or more rotating grinding rollers are suspended on the plum blossom frame. The rotating shaft rotates at a certain speed to drive the grinding roller to swing outward. And driven by centrifugal force to the grinding ring embedded in the inner wall of the cylinder. When the material enters the grinding zone, it is brought to the front zone of the grinding roller by the action of the plow-shaped guide vanes under the grinding roller. Since the grinding force (centrifugal force) of the Raymond grinding wheel is limited by the diameter and speed of the grinding roller, the grinding is only suitable for soft, low ash and easy-grinding coal materials at the time, and Germany The coal is hard and the ash is high, which requires higher grinding power. The Raymond coal mill of this structure is difficult to meet the grinding requirements, so Raymond coal mill has not been popularized in Germany. At that time, Raymond coal mill was suitable for the grinding requirements of American coal, so Raymond coal mill was widely promoted and applied in the United States.

The difference between ultrafine Raymond mill and ordinary Raymond mill

Ultrafine Raymond mill is also known as ultrafine Raymond mill. It mainly produces ultrafine powder. The main difference between ultrafine Raymond mill and ordinary Raymond mill is that the principle of powder selection is different. Ordinary Raymond mill powder is selected by circulating air. After the material is crushed, it is shoveled by a blade, then the powder is lifted, and the air is blown to the cyclone through the blower. Degrees are carried out. The ultrafine Raymond mill is operated under full negative pressure. The material is also smashed and then shoveled by a shovel. Then the powder is lifted to the cage by the high-pressure induced draft fan for precise grading. Ultrafine Raymond mill mainly processes fine powder with a fineness of 400-3500. It is widely used in the processing of silicon carbide micro-powder, kaolin Raymond grinding, carbon black powder processing and so on. Ordinary Raymond mill mainly processes fine powder with a fineness of 40-600 mesh. It belongs to general-purpose equipment. The processed materials mainly include limestone, fly ash, coal, etc., with hundreds of species. The dust removal method of the ultrafine Raymond mill adopts the large-volume pulse back-blowing technology, and the external filter type is required, and an air compressor is required. Ordinary Raymond mills use a simple cloth pocket.

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