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How to choose a 325 mesh Calcium carbonate grinding mill?

Posted: 2019-07-11

325 mesh calcium carbonate calcium carbonate powder is widely used. Which calcium carbonate grinding mills are suitable for producing 325 mesh calcium carbonate powder? Below we will try to find the answer for you. The models mainly involved in calcium carbonate grinding mill is YGM Raymond mill and HGM micro powder grinding mill.

Kindly noted, the calcium carbonate powder we mentioned is ground calcium carbonate powder.About precipitated calcium carbonate(light calcium carbonate powder,PCC) we will analyze in detail in subsequent articles.

Ground calcium carbonate powder also named heavy calcium carbonate powder,Abbreviation GCC. It is made of high-quality limestone and processed into a white powder by a lime mill. Its main component is CaCO3.

At first,let's see what is the use of 325 mesh calcium carbonate powder.

GCC for the paper industry

325 mesh heavy calcium carbonate (heavy calcium powder) for papermaking, whiteness requirement: 95%, calcium carbonate content: 98% calcium carbonate plays an important role in the paper industry. It can guarantee the strength and whiteness of the paper, and the cost is low.

GCC for the construction industry (dry mortar, concrete)

Dry mortar with heavy calcium carbonate (heavy calcium powder) 325 mesh, whiteness requirement: 95%, calcium carbonate content: 98%, calcium carbonate plays an important role in concrete in the construction industry. Not only can reduce production costs, but also increase product toughness

GCC for artificial marble industry

Artificial marble with heavy calcium carbonate (heavy calcium powder) 325 mesh, whiteness requirement: 95%, calcium carbonate content: 98.5%, pure and free of impurities. Calcium carbonate has been widely used in the production of artificial marble.

GCC for the feed industry

For the feed industry, heavy calcium carbonate (heavy calcium powder) 325 mesh, whiteness requirement: 95%, calcium carbonate content: 99%, pure and free of impurities. Calcium carbonate can increase the calcium content of the feed and improve the quality of the feed.

325 mesh calcium carbonate grinding mills

For 325 mesh calcium carboante powder making,there are mainly two types of grinding mills,which are popular in the market. They are YGM Raymond mill and HGM micro powder grinding mill.

1. 325 mesh calcium carboante grinding mill-YGM Raymond mill

YGM series Raymond Mill is suitable for processing various non-flammable and non-explosive mineral materials with Moh's hardness less than 9.3 and humidity less than 6%. It is widely used in the fields of metallurgy, construction, chemical industry, mining, highway construction etc,. The granularity of the finished powder size can be adjusted between 50 and 325 mesh (315-45 micron). Examples of processing materials include quartz, feldspar, barite, calcite carbonate, limestone, talc, ceramic, iron ore, carborundum, bauxite, rock phosphate, coal and other materials, about 400 kinds of materials in total.

calcium carbonate grinding mill raymond mill

Raymond mill is mainly composed of main unit, analyzer, fan, dischargeing cyclone separator, powder cyclone separator and air duct. Among them, the main unit consists of frame, blow shell, shovel, grinding roller and grinding ring.

The rollers tightly rolled on the ring under the effect of centrifugal force. Shovel sends material between the roller and ring and the material is grinded into powder under the high pressure.Then the fan blows the power up into the analyzer. At this time, the power material met the fineness requirement get through the analyzer and get into the power cyclone separator while the others will be sent back for re-grinding.The whole system is airtight circulation.

Type	Roller			Max. feeding size(mm)	Fineness(mm)	Output(t/h)	Power(kw)	Size(mm)
Type	No.	Dimension(mm)	Height(mm)	Max. feeding size(mm)	Fineness(mm)	Output(t/h)	Power(kw)	Size(mm)
YGM7815	3	260	150	15	0.613-0.033	1-3	18.5	430035005100
YGM8314	3	270	140	20	0.613-0.033	1.2-4.6	22	530041005200
YGM9517	4	310	170	25	0.613-0.033	2.1-5.6	37	710059007900
YGM4121	5	410	210	30	0.613-0.033	2.8-10.5	75	920072509700
MTM1600	6	440	270	35	0.613-0.033	5-20	132	1255057008350

2. 325 mesh calcium carboante grinding mill-HGM micro powder grinding mill

HGM micro powder grinding mill is the new type mining equipment for making micro powders, fine powders，which is widely applied in the industries of metallurgy, mining, chemistry, cement, construction, refractory materials, ceramics, and so on.The purpose of the micro powder grinding millis for super-fine grinding materials with hardness less than 9 in Moh's scale and humidity less than 6 percent such as kaolin, limestone, calcite, marble, talcum, barite, gypsum, dolomite, bentonite mud, mica, pyrophyllite, sepiolite, carbon black, diatomite, graphite, alunite, fluorite, potassium feldspar, phosphorite, pigment, up to 200 kinds.

calcium carbonate grinding mill HGM grinding mill

Calcium Carbonate Powder Making Machine Production line: 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.

When the grinding mill is at work, all the grinding rollers are rolling in the ring, and the materials are driven to the edge of the turnplate by the centrifugal force and fall down into the grinding chambers where the materials are repeatedly pressed, crushed and grinded by the rollers.

The high-pressure air blower constantly inhales air within the grinding mill and, in turn, the airflow with crushed materials are brought to the classifier whose high-speed impeller will screen the airflow: the unqualified particle size will fall and return to the mill for being reground while the qualified particle size mixed with air will go into the cyclone powder collector. Most of the qualified powders will fall and exit from the discharging valve at the bottom; a small proportion of the fine powders, with airflow, moves to the dust cleaner, and clings to the surface of the filter bags. At the same time, the fine powders clinging to the surface fall down by the sudden vibration of the filter bags, which is caused by the instantly ejected high-pressure gas controlled by the pulse valve. The materials from the above two lots are sent by the conveyor at the bottom to get finished powders packed. In addition, filtered clean air will be emitted from the air outlet of muffler in the end.

Model	HGM80	HGM90	HGM100	HGM125	HGM168L
Ring Diameter(mm)	800	900	1000	1250	1680
Ring Number (PCS)	3	3-4	4	4	4
Roller Number(PCS)	18-21	24-29	28-36	30-44	30-40
Main Shaft Speed (r. p. min)	230-240	200-220	180-200	135-155	120-130
Input Size (mm)	≤10	≤10	≤15	≤15	≤20
Finished Size (um/mesh)	74-5 (200-2500)	74-5 (200-2500)	74-5 (200-2500)	100-6 (150-2000)	100-9 (150-1500)
Capacity (t/h)	0.4-4.5	0.6-6.5	1-9	2-16	3.8-30
Outlet Size LWH (m)	13.946.2	14.74.87.2	184.68.6	14910.25	26.37.511.9

3. Comparison of YGM Raymond mill and HGM micro powder grinding mill

YGM Raymond mill	HGM micro powder grinding mill
Grinding by centrifugal force,loud noise,direct touch between rings and rollers in high abrasion.	High rotation speed of grinding parts,suitable for grinding matrials lower than Mohs 6 grade
Low grade products	2 micron content about 30% at most
Low investment,low cost,unstable quality	Low investment,easy operation
D97 < 325 mesh, 2micron <10%	D97 < 2500 mesh, 2micron <30%

According above information we can see, if you only want to produce 325 mesh calcaium cabonate powder and the application industry does not require high quality powder, Raymond mill is cheaper and is a better choice. But if your downstream industry has high requirements for powder quality, you also have the need to produce higher fineness powder, and your country is environmentally demanding, and you don't want noise, HGM micro powder grinding mill will be the best choice.