Fly ash also called coal ash, is one of the residues generated in combustion, and comprises the fine particles that rise with the flue gases. Ash which does not rise is termed bottom ash. In an industrial context, fly ash usually refers to ash produced during combustion of coal. Fly ash is generally captured by electrostatic precipitators or other particle filtration equipment before the flue gases reach the chimneys of coal-fired power plants and together with bottom ash removed from the bottom of the furnace is in this case jointly known as coal ash.

<>Overview about Fly ash vertical powder mill equipment:
We are a leading manufacturer of Fly ash vertical powder milll equipment in Shanghai, China. As a professional manufacturer of this kind of machine, we have been in this line for many years, and now our products spread over the world for the good quality and competitive price.
Fly ash vertical powder milll equipment is a new type machine to grind Fly ash, coal ash Stone into super thin Powder.
The final Powder size can be from 5micron to 47micron as per 97% passing rate.
Fly ash vertical powder milll equipment is mainly applied to non-inflammable, non-explosive and brittle materials with Mohs hardness scale under seven, such as calcite, chalk, limestone, dolomite, carbon black, bentonite, kaolin, talc, mica, magnesite, illite, pyrophyllite , roseite, sea-foam, attapulgite , rectorite, diatomite, barite, gypsum, alunite, graphite, fluorite,  rock phosphate, kalium ore, pumice etc. totally more than 100 kinds of materials.
Finished powder products are in the 325meshs -3000meshs, and yield can be up to 0.5-12 tons per hour. There are five types of Shanghai CLIRIK HGM series Fly ash vertical powder milll equipment; they are HGM80, HGM90, HGM100, HGM100A and HGM125.

<>Detailed Product Description about Fly ash vertical powder mill:
Fly ash vertical powder milll equipment is mainly applied to grind non-inflammable, non-explosive and brittle materials with Mohs’ hardness under six. Such as calcite, chalk, limestone, dolomite, kaolin, gypsum, and talc etc, totally more than 100 kinds of materials. Product fineness can be controlled between 300~3000 mesh (47~5 micron) 
Comparable with ball mill, Fly ash vertical powder milll equipment has features of low cost, high capacity, easy operation; Comparable with Raymond mill for coarse powder up to 325 meshes, it can produce fine powders between 47 and 5 microns (300 to 3000 meshes)

<>Performance and features of Fly ash vertical powder mill:
1. High efficiency
Under the same final size and power, the product capacity of micro powder vertical powder mill is twice than jet mill and agitation mill.
2. Long lifetime of wearing parts
The roller and ring are made of special material, which improve the grinding efficiency a lot. For same material and final size, the lifetime of its wearing parts can reach to more than one year, about 2-5 times as long as that of vertical impact crusher and turbo-mill. Especially when handling calcium carbonate and calcite, the lifetime can reach 2-5 years.
3. High safety and reliability
There are no rolling bearings and bolts in grinding cavity, so problems caused by bolts shedding or wear of bearings and seal components will never happen.
4. High fineness of products
The product fineness can reach D97≤5μm.
5. Environment friendly
The application of DMC-120 pulse dust collector and muffler reduce the pollution and noise of the dust, which has reached national environment protection standard

<>Production Line Configuration of Fly ash vertical powder mill:
The whole set HGM Fly ash vertical powder mill consists of  hammer crusher, bucket elevator, storage hopper, vibrating feeder, main unit, inverter classifier, cyclone collector, pulse deduster system, high pressure positive blower, air compressors and electrical control systems

<> Working Principle of Fly ash vertical powder mill:
The main bearing and each dial are driven by electromotor of main machine through reducer, and numbers of rollers, which are rolling in the ring, are driven by dial through plunger. After crushed by hammer crusher, the big materials become small ones and are sent to storage hopper by elevator and further sent to the middle of first dial evenly by the electromagnetic vibrating feeder and feeding pipe. The materials will be driven to the edge of dial by centrifugal force and fall down into the ring, crushed and grinded by roller, and become powder after production of three rings. The high pressure centrifugal blower will inhale air from outside and blow the crushed materials to classifier. The rotating turbo in the powder concentrator will make the coarse powder return to the mill and reground, while the fineness will mix with the air and go into the cyclone and be discharged in the discharge bin, which is at the bottom of it. The air, which mixed with very little fineness, will be purified by impulse duster and discharged by blower and muffler.

<>Technical Data of Fly ash vertical powder mill:

Model	HGM80	HGM90	HGM100	HGM100A	HGM125
Ring Diameter(mm)	800	930	1035		1300
Ring Number(PCS)	3	3～4	3	4	4
Roller Number(PCS)	21	24～32	27	34～36	40～44
Main Shaft Speed(r.p.m.)	230～240	200～220	180～200		135～155
Input Size(mm)	≦20
Finished Size/um(mesh)	5-47(325~2500)
Capacity (t/h)	0.5-4.5	0.6-6.5	0.7-7	1-8.5	1.5-12
Outlet Size (L*W*H, m)	13.9*4*6.2	14.7*4.8*7.2	18*4.6*8.6		14*9*10.25
Motor Power(KW)	145-165	185-204	263	263-290	380-430

Note: This specification is just referencing, any changes are subject to the products.