HGM Stone Mill Grinder for Ultrafine Mineral Ore Powder Production

The HGM Stone Mill Grinder, also known as the HGM series ultrafine powder grinder mill, is a highly advanced and efficient grinding machine designed to produce fine and superfine powders from a wide range of non-inflammable, non-explosive, and brittle materials with a Mohs hardness under 6.

This versatile equipment has gained significant popularity in various industrial sectors due to its ability to process over 100 different types of materials, including calcite, chalk, limestone, dolomite, kaolin, bentonite, talc, mica, magnesite, illite, pyrophyllite, vermiculite, sepiolite, attapulgite, rectorite, diatomite, barite, gypsum, alunite, graphite, fluorite, rock phosphate, kalium ore, pumice, and many others.

What Materials Can the HGM Stone Mill Grinder Process?

Components of HGM Stone Mill Grinder

The HGM Stone Mill Grinder is a complex system comprising several key components that work together to ensure efficient and effective grinding operations. The main components include:

1. Main Unit: This is the core part of the machine where the actual grinding takes place. It consists of grinding rollers and rings that crush and grind the materials.
2. Classifier: The classifier is responsible for separating the ground materials into different particle sizes. It ensures that only the materials of the desired fineness are collected, while the coarser particles are returned for regrinding.
3. Powder Collector: This component collects the fine powder produced during the grinding process. It is usually a cyclone powder collector that efficiently separates the powder from the airflow.
4. Dust Cleaner: To maintain a clean working environment and comply with environmental standards, the HGM grinder is equipped with a pulse jet dust collector that captures and removes dust particles.
5. Blower: The blower plays a crucial role in maintaining airflow within the system. It helps transport the ground materials through the classifier and into the powder collector.
6. Muffler: To reduce noise pollution, the HGM grinder is fitted with a muffler that significantly lowers the operational noise levels.
7. Sound-Proof Room: Some models come with a sound-proof room to further minimize noise and provide a quieter working environment.
8. Crusher: Large materials are first crushed by a hammer crusher before being fed into the grinding mill.
9. Bucket Elevator and Storage Hopper: These components are used to transport and store the materials before they are fed into the grinding mill.
10. Vibrating Feeder: The vibrating feeder ensures a steady and even supply of materials to the grinding mill, enhancing the efficiency of the grinding process.

Working Principle of HGM Stone Mill Grinder

When the grinding mill is in operation, the grinding rollers roll inside the grinding rings, applying significant pressure and grinding action to the materials.

The materials are driven to the edge of the turnplate by centrifugal force and fall into the grinding chambers, where they are repeatedly pressed, crushed, and ground by the rollers.

The high-pressure air blower continuously inhales air within the grinding mill, and the airflow carries the crushed materials to the classifier.

The classifier’s high-speed impeller screens the airflow: materials with unqualified particle sizes fall back into the mill for regrinding, while the qualified fine powders mixed with air move into the cyclone powder collector.

Most of the qualified powders exit through the discharge valve at the bottom, while a small portion of the fine powders moves to the dust cleaner, where they cling to the surface of the filter bags.

The fine powders are then dislodged by the sudden vibration of the filter bags, caused by the instant ejection of high-pressure gas controlled by a pulse valve.

Finally, the filtered clean air is emitted from the muffler’s air outlet.

Features and Advantages of HGM Stone Mill Grinder

1. High Efficiency: The HGM Stone Mill Grinder is renowned for its high grinding efficiency. Under the same finished final size and motor power, the capacity of the HGM grinder is twice as much as that of a jet mill, mixing grinder, or ball mill.
2. Long Lifecycle of Spare Parts: The grinding rings and rollers are forged from special materials, ensuring high utilization and durability. Under the same grinding conditions, the lifecycle of these spare parts can reach up to one year, which is 2-3 times longer than that of impact mills or turbo mills. For grinding calcite carbonate, the lifetime can even extend to 2-5 years.
3. High Safety and Reliability: The grinding cavity of the HGM grinder does not contain rolling bearings or screws. This design eliminates the risk of problems caused by bolt shedding or rapid wear of bearings and seal components.
4. High Fineness and Flexible Adjustment: The final fineness of the ground materials can be adjusted between 325 meshes and 3000 meshes. The product fineness can reach D97≦5um, making it suitable for a wide range of applications that require ultrafine powders.
5. Environment-Friendly: The HGM grinder is equipped with a pulse jet dust collector and a muffler. These components effectively reduce dust pollution and noise, ensuring that the machine operates in compliance with national environmental protection standards.

Applications of HGM Stone Mill Grinder

The HGM Stone Mill Grinder finds extensive applications across various industries due to its ability to produce fine and superfine powders from a wide range of materials. Some of the key application areas include:

1. Metallurgy: Used for grinding minerals and ores to produce fine powders for further processing.
2. Building Materials: Ideal for producing fine powders of limestone, dolomite, and other materials used in the construction industry.
3. Chemical Industry: The HGM grinder is used to produce fine powders of various chemicals, such as kaolin and bentonite, which are used in the manufacturing of paints, plastics, and other chemical products.
4. Mining: The machine is widely used in the mining industry for grinding minerals like graphite, fluorite, and phosphate rock.
5. Plastic Industry: Fine powders of materials like talc and mica are used as fillers in the plastic industry.

Technical Data of HGM Stone Mill Grinder

The HGM Stone Mill Grinder is available in various models to meet different production capacities and material requirements. Some of the key technical data for different models are as follows:

Model	HGM80	HGM90L	HGM100L-Ⅱ HGM100P	HGM125L	HGM1680L
Ring Diameter(mm)	800	900	1000	1250	1680
Ring Number(layer)	3	3-4	4	4	4
Roller Number(piece)	18-21	24-29	28-36	30-40	30-44
Main Shaft Speed(r.p.m)	230-240	200-220	180-200	135-155	120-130
Input Size(mm)	≤20	≤20	≤20	≤20	≤20
Finished Size(μm/mesh)	74-5 (200-2500)	74-5 (200-2500)	74-5 (200-2500)	100-6 (150-2000)	100-9 (150-1500)
Capacity(t/h)	0.5-5.5	0.8-6.5	1.2-10 1.2-11	2.5-20	5-45
Overall Dimension(L*W*H,m)	15.1*4.2*7.3	18.4*3.9*7.8	22.7*3.6*8.5	27.3*4.2*9.9	31.7*7.7*12.6
Note: The capacity is based on the domestic CaCO₃ powder factories’ feedback.

Why choose the HGM stone mill grinder?

The HGM Stone Mill Grinder is a highly efficient and versatile grinding machine that offers numerous advantages over traditional grinding mills.

Its ability to produce fine and superfine powders from a wide range of materials, combined with its high efficiency, long-lasting spare parts, and environmentally friendly design, makes it an ideal choice for various industrial applications.

Whether used in the metallurgy, building materials, chemical, or mining industries, the HGM grinder ensures high productivity, reliability, and compliance with environmental standards.