How to Choose Bauxite Grinding Mill?

What is bauxite?

Bauxite is a soil-like mineral that mainly composed of alumina, which is white or off-white, and appears brownish yellow or light red due to its iron content. It can be ground into fine bauxite powder that has many applications. Bauxite is generally formed by chemical weathering or exogenous action. There are few pure bauxite, bauxite basically contains more or less clay minerals, metal minerals, titanium minerals, and detrital heavy minerals. Bauxite with Mohs hardness of 1-3, it is opaque, brittle, insoluble in water, soluble in sulfuric acid and sodium hydroxide solution.

The Applications of Bauxite

Bauxite is a superior raw material for aluminum smelting and refractory material. It has been widely used in the following industries.

1.Aluminum smelting industry: used in national defense, aviation, automobiles, electrical appliances, chemicals, daily necessities, etc.

2.Precision casting: Bauxite clinker is processed into fine powder to make a precision casting after casting. It can be widely used in military, aerospace, communications, instrumentation, machinery and medical equipment sectors.

3.Refractory products: High alumina bauxite clinker has a fire resistance of up to 1780 ℃, strong chemical stability and good physical properties, and is a superior refractory material.

4.Aluminum silicate refractory fiber: it can be used in steel, nonferrous metallurgy, electronics, petroleum, chemical industry, aerospace, atomic energy, national defense and other industries, featuring light weight, high temperature resistance, excellent thermal stability, low thermal conductivity, small heat capacity and resistance mechanical vibration.

5.Using magnesia and alumina clinker adding binding agent is very effective for pouring the entire barrel lining of steel drums.

6.Bauxite can be used to produce alumina cement, abrasive materials, ceramic industry and chemical industry can produce various compounds of aluminum.

Analysis of Bauxite Raw Material

Model Selection of Bauxite Grinding Mill

Note: the selection of main mill is based on the yield and final product fineness.

Bauxite Powder Milling Process

Phase 1: Crushing the raw materials

Potash Feldspar blocks are crushed by the crusher to the size of 15mm-50mm and into grinding mill.

Phase 2: Grinding

The crushed coarse Potash Feldspar are sent to the storage hopper by the elevator, and then sent to the grinding chamber by the feeder for grinding.

Phase 3: Classification

The ground material is classified by the classification system, and the unqualified powder will returned to the main mill to be reground.

Phase 4: Collection of finished products

The qualified fine Potash Feldspar powder enters the dust collector through the pipeline along with the airflow for separation and collection. The collected finished powder is sent from the conveying device to the finished product bin through the discharge port, and then packed by a powder tanker or automatic packer.

Analysis of different types of grinding mill 

HLM Vertical Grinding Mill

Large-scale equipment, extremely high product yields, high degree spheroidization of final product, superior quality, high reliability. High capital investment.

HLMX Superfine Vertical Grinding Mill  

HLMX superfine vertical grinding mill is preferred to grind fineness above 1250 mesh, and can produce 3μm fineness if equipped with the multi-level classification system. Efficient grinding, high degree of spheroidization. Higher capital investment than ultra-fine grinding mill.

HCH Ultra-fine Grinding Mill

Lower capital investment and energy consumption, it is an economic and efficient grinding mill, but lower yield on a single mill. Multiple mills will be needed for large-scale production.

HC Super Large Grinding Mill

Lower capital investment, high product throughput, lower energy consumption and noise, high reliability. Multiple mills will be needed for large-scale production.

Bauxite Powder Milling Case

Grinding material: Gypsum

Fineness: 325 mesh D97 

Product yield: 8-10 t/h 

Equipment configuration : 1 set of HLM2400 Grinding Mill

Customer evaluation: Hcmilling (Guilin Hongcheng) Vertical Grinding Mill integrates the functions of crushing, grinding, powder selection, drying and material conveying in one unit. Hcmilling experts assisted us in model selection of grinding mill, from fineness, final product quality, throughput to after sale service, to ensure the desired grinding results.