Pyrophyllite is a kind of clay mineral, which is a layered hydrous aluminosilicate mineral with a crystal structure of 2:1 type. It has fine texture, low hardness (1-2), stable chemical properties, good insulation and heat insulation, and has good Machining performance, mainly distributed in Fujian and Zhejiang provinces. According to different uses, it is divided into two types: industrial pyrophyllite and carving pyrophyllite, which can be widely used in ceramics, refractory materials, sculpture, rubber, paint, metallurgy, building materials, chemical industry, light industry and other fields.
Pyrophyllite grinding process
Pyrophyllite powder is generally divided into four types: coarse powder processing (0-3mm), fine powder processing (20 mesh-400 mesh), ultra-fine powder processing (400 mesh-1250 mesh) and micro powder processing (1250 mesh-3250 mesh) .
Phase 1: Broken
Large pieces of pyrophyllite are crushed by the crusher to the feed fineness (15mm-50mm) that can enter the mill.
Second Stage: Grinding
The crushed small pieces of pyrophyllite are sent to the silo by the elevator, and then evenly and quantitatively sent to the grinding chamber of the mill by the vibrating feeder for grinding.
CLRM Raymond Mill and YGM High Pressure Mill can be used for fine powder processing; CLUM ultra-fine vertical mill and HGM ring roller micro powder mill are generally used for ultra-fine powder processing; European-style coarse powder mill is used for coarse powder processing.
Stage Three: Grading
The ground pyrophyllite powder is classified by the powder classifier, and the unqualified powder is classified by the powder classifier and returned to the main machine for re-grinding.
The fourth stage: collecting powder
The fineness powder enters the dust collector with the airflow through the pipeline for separation and collection, and the collected finished powder is sent to the finished product silo by the conveying device through the discharge port, and then uniformly packed by a powder tanker or an automatic baler.
Pyrophyllite Ultrafine Grinding Machine
Among the pyrophyllite processing equipment, the HGM series three-ring and four-ring medium-speed micro-powder mill is a new type of grinding equipment successfully developed and manufactured by Shanghai Keliruike Mill. HGM mill can not only process pyrophyllite, but also process ultra-fine powder of non-flammable and explosive brittle materials with medium and low hardness, Mohs hardness ≤ 7, such as calcite, chalk, limestone, dolomite, carbon black , pyrophyllite, bentonite, talc, petroleum coke, magnesite, illite, pyrophyllite, vermiculite, sepiolite, attapulgite, rectorite, diatomite, barite, gypsum, alunite, graphite, fluorite More than 100 kinds of materials such as stone, phosphate rock, potassium ore, pumice, etc. The particle size of the finished fine powder can be adjusted arbitrarily between 325-3000 mesh, and the output can reach 0.4-45 tons per hour.
The complete configuration of the ultrafine pulverizer production line includes hammer crusher, bucket elevator, storage bin, vibrating feeder, petroleum coke pulverizer host, frequency conversion classifier, double cyclone powder collector, pulse dust removal system, High pressure fan, air compressor, electrical control system.
Working principle of pyrophyllite micro powder mill
When the mill is working, the motor of the main machine drives the main shaft and the turntable to rotate through the reducer, and the roller pins on the edge of the turntable drive dozens of grinding rollers to roll in the grinding ring raceway. The pyrophyllite raw ore is broken into small particles by the hammer crusher, and then sent to the storage bin by the elevator, and then the pyrophyllite particles are evenly sent to the bulk material tray on the upper part of the turntable through the vibrating feeder and the inclined feeding pipe. superior.
The pyrophyllite particles are scattered to the periphery of the circle under the action of centrifugal force, and fall into the raceway of the grinding ring to be impacted, rolled, and ground by the ring rollers, and become pyrophyllite powder through three-layer ring processing. The outside air is sucked into the machine, and the crushed pyrophyllite powder is brought into the powder classifier.
The rotating impeller in the powder concentrator makes the coarse pyrophyllite powder fall back for regrinding, and the fine powder that meets the requirements enters the cyclone powder collector with the airflow and is discharged from the discharge valve at the bottom of it, which is the final superfine pyrophyllite powder, and the fine powder with The airflow of a small amount of fine dust is purified by the pulse dust collector and then discharged through the fan and muffler.
Performance characteristics of pyrophyllite micro-powder mill
When the fineness of the finished pyrophyllite powder and the power of the motor are the same, the output of the pyrophyllite grinding machine is more than double that of jet mills and ball mills.
2. Long service life of wearing parts
Grinding rollers and grinding rings are forged from special materials, which greatly improves the durability. In the case of the same material and finished product fineness, the service life of the wearing parts of the pyrophyllite micro-powder mill is 2-3 times longer than that of the impact crusher and turbo mill, generally up to one year; When the grinding equipment is processing calcium carbonate, pyrophyllite and calcite, its service life can reach 2-5 years.
3. High safety and reliability
Because there are no rolling bearings and screws in the grinding chamber, there is no problem of easy damage to bearings and seals, or damage to the machine due to loose screws.
4. High product fineness
The fineness of the finished pyrophyllite powder processed by this grinding equipment can reach D97≤5μm at one time.
5. Less environmental pollution
The use of environmentally friendly pulse dust collectors and mufflers in the milling equipment greatly reduces dust and noise and does not pollute the surrounding environment.