Application of the High Pressure Grinding Mill:

The grinding mill is mainly applied to the powder processing of mineral products in the industries of metallurgy, construction materials, chemical, and mining, etc.The grinding mill can produce powder from various non-flammable and non-explosive mineral materials with Moths hardness below 9.3 and humidity below 6%, such as quartz, feldspar, calcite, talcum, barite, fluoride, Xircom, cinder, white lime, cement clinker, activated carbon, dolomite, granite, soft coal, coking coal, lignite, magnesia, chromium oxide green, gold ore, red clay, clay, kaolin, coke, coal Gangue, porcelain clay, kyanite, fluorspar, bentonite, medicinal stone liparite, diabase, pyrophyllite, shale red stone, emeraldite, basalt, gypsum, graphite, carborundun, heat insulating material, etc.

Six Key Features of the High Pressure Grinding Mill:

Compared with the common YGM4119 Raymond grinding mill under the same power conditions, the capacity can be increased by 10%, under the performance of high-pressure springs, the rollers grinding pressure on raw materials can be raised by 1500kgf. All the mineral materials with Mohs hardness below 9.3 can be crushed. The final product size ranges from the maximum particle diameter of 0.95mm (20mesh) to the finest diameter of 0.038mm (400 meshes). A few materials can reach 0.013mm (1000 mesh). Its dust-removing effect fully meets the national dust discharge standard. The classifier is easy for adjustment. The grinding device adopts a superposition multi-grade sealing with good sealing performance.

The Operating Principal and Characteristics of the Whole System

The whole system of YGM4121 high pressure grinding mill consists of main frame, reducer, classifier, piping device, blower, jaw crusher, dustpan elevator, electromagnetic vibration feeder, and electric switch box motor, etc (for details, please refer to the installation, foundation diagram).

Operating Principal Of Grinding Mill:
1, the whole operating process of the grinding mill (the crushing process of grinding material) is illustrated as follows; the lump materials is firstly crushed by the jaw crusher into the required particle size; then the crushed materials is transferred to a hopper by the elevator and fed uniformly, quantitatively and continuously by the vibration feeder in the grinding chamber of the main frame for grinding. The grinding particles are brought up by the air current of the blower into the classifier for classification. The particles with the required fineness are brought up by the air current through the pipe into a cyclone collector for separation and collection and the finished particles are discharged from a pipe outlet, the air current of the whole system is in a sealed circulation under the conditions of the positive and negative pressure.
2, due to some moisture contained in the materials to be grinded in a grinding chamber, the heat resulting from grinding leads to the vaporized air which changes the airflow volume, moreover, the outside air inhaled from the narrow gaps, of the piping connections can increase the volume of air current. Therefore, it is necessary to adjust to redundant air pipe between the blower and the main unit for keeping the balance of the air current. The redundant air is then guided into a cloth bag of a dust cleaner to collect the fine powder in the air. And the redundant air is discharged after purification.
3, the main unit runs with a central shaft is driven by a transmission device. The top of the shaft is connected with a quincunx stand, on which a grinding roller is installed to form a swing support; the grinding roller not only rotates around its own axis due to the friction.
4, the classifier performs the function of classifying the particles by the rotation of blades on the disk driven by a speed-adjustable motor. The rotation speed of the blades is regulated according to the particle size of the finished powder. In order to realize a finer particle size, the powder particles that do not meet the requirement are thrown by the blades to the outer wall and separated from the air current. The coarse particles drop because of self-gravity into the grinding chamber for regrinding. The qualified particles go through the blades and are inhaled by the air current into the cyclone. Then the particles are separated from the air current and collected.
5. the cyclone collector plays an important role in the performance of the grinding mill. When the air current with the powder enters the collector, it is at a high speed of rotation. After the air current are separated form particles, and when the air current concentrates towards the center along the cone wall and moves to the bottom of the cone (the natural length of the air current), an upward rotating air column is formed. Meanwhile, the particles are separated and fall down for collection. Because the core of the upward rotating air current is in state of negative pressure, the lower part of the collector must meet a very strict requirement of sealing and be isolated entirely form the outside air. Otherwise, the collected particles will be taken away by the central air current, which will directly influence the output of the complete system. Therefore, a powder-locking unit is installed under the collector. It is a very important component. If the powder-locking unit is not installed, or the powder-locking unit has not strict sealing, the output of the complete system will be seriously influenced with no or less production of the finished powder.
Feature of Whole System:
1, the whole grinding mill is of a standing structure. It features of small occupying space and strong integration capacity, it can form up an independent production system from lump materials crushing to finished powder and packaging.
2, all the finished particles produced by the grinding mill have a good uniformity of fineness, 98% of the particles can meet the required fineness and go through the sieve, i.e. the passing rate is 98%. This is the advantage that other power grinding equipment cannot exceed.
3, the transmission device of the main unit is equipped with a closed gearbox that runs smoothly and reliable. The key components of the grinding mill are made of best quality steel, so the whole system is durable and reliable.
4, the electrical system of the grinding mill is centrally controlled and the advanced model is rationally selected with high automation, basically, an unmanned operation can be realized in the grinding workshop. The light weight and compact vibration feeder can feed the material uniformly. It is easily adjustable, energy saving and convenient for operation and maintenance.

The Grinding Mill Technical Data: