Mine mills or wet grinding mills MMS are intended for grinding coal, grog and clay.
Mine mills traditionally work in the same working cycle with separators-dryers of a mine type.
Mine mill is an impact mechanism and its prototype is a hammer crusher. Impact machines are equipped with rotating rotors with hammers.
Area of application of mine mills
Mine wet grinding mills MMS, MSM are intended for processing non-ferrous and ferrous metals, diamonds and other raw materials mining.
Mine mill MSM-1000
The mine mill is a modified model of a hammer crusher. Particles of materials are crushed by mill hammers, captured by a flow of gases entering the mill through a special duct, and are ejected into a special chamber, in which they are separated. At the same time, large particles fall into the mill for re-grinding.
Mine mill MSM-1500
This mill, like other crushing machines of its model line, has the ability to accumulate small particles and to re-grind large particles. The final product particle size can be adjusted in certain limits by changing positions of breaker plates and corresponding gas flows. The mill can be used as a drying-grinding machine.
The following auxiliary electrical equipment can be purchased additionally to your machine: power switchboards, cable products, automation systems.
Mine type mills are recommended for grinding soft materials (because of high wear and tear of hammers): peat, brown coal, kaolin, chalk. With regular machine operation, sizes of its hammers decrease, and, as a result, mill capacity decreases too.
Technical data of mine mills
The mine mills are loaded with materials from various feeders. The mill is installed on a grinding site taking into account a layout of other production machines.
With fine grinding source materials, the mill capacity decreases, and its power consumption increases.
The principle of operation of mine mills
A source material enters the mill through a special pipe. The mill rotor crushes the material, and then it is ejected into a special chamber. The material is captured by a flow of gases entering the mill through a special duct and poured into a special chamber under its own weight.
Large pieces of the materials are re-grinded. Small particles are accumulated.
Often, mine mills are equipped with special grates or shutters with swinging plates, which improves the separation function.
Under the influence of hot gas, the source material can be dried, that is, the mill can be effectively used as a drying machine. The position of breaker plates and gas flow can be regulated, as a result, adjusting the final product particle size.
When hot gases enter the working chamber, they pass through its upper expanded part (with better distribution of the flow). The main disadvantage of such design is the accumulation of the crushed material on chamber walls, resulting in non-uniform mill loading.
To avoid excessive load on hammers, the back and front walls of the chamber are made at an angle of 60°, and the upper part of the chamber is made of thick-walled sheet steel.