Highly efficient ore dressing system of medium-low class aluminium ore

Abstract

The invention designs the center low-grade bauxite dressing method, takes the center low-grade one water duralumin stone bauxite as the raw material, the main point is uses the 'selective rubbing, the graduation, escapes the putty, the concentration, the narrow rank flotation process' technical process, the selective rubbing uses the ball mill or the vibration rub; The graduation is separates the qualified large grain ore concentrate, chooses water used grain-by-grain selection flowing; escapes the putty, the concentration is carries on the escapes the putty to the ore slime which is smaller than 10mu m and to cause the pulp concentration, satisfies the pulp density request of the following flotation process, uses the water power cyclone; The narrow rank flotation process uses the flotation process craft, the flotation reagent is the ore-dressing;the catche receive medicinal preparation is the fatty acid, the dispersing agent is the sodium carbonate,merges the graduation work obtained large grain ore concentrate with the flotation concentrate and final obtain the ore concentrate,the aluminum silicon ratio in the large grain ore concentrate is bigger than 9, the production rate 30~50%, the Al2O3returns-ratio 40~50%, the mix ore concentrate aluminum silicon ratio is 9~10, the Al2O3returns-ratio is bigger than 88%.The technical process structure is simple,the production cost is low, the movement is steady, the target is stable, has a stronger adaptiveness to the center low-grade one water duralumin stone bauxite.

Description

technical field [0001] The invention relates to a processing method of bauxite, in particular to a beneficiation method of middle and low grade bauxite. Background technique [0002] Bauxite is an important strategic resource and an important raw material for alumina industry, refractory material industry and building material industry. The world is rich in bauxite resources, mainly distributed in Australia, Guinea, Vietnam, Jamaica, India, Suriname, Indonesia, Greece and China. The ore types are mainly divided into: gibbsite type, boehmite type and diaspore type. Most of them in foreign countries are gibbsite type, which is characterized by low aluminum and silicon, high aluminum-silicon ratio, and generally high iron oxide content. [0003] my country is rich in bauxite resources, and most of the ore is diaspore type. The aluminum-silicon ratio of bauxite is mostly distributed between 4 and 10, accounting for about 85.61% of the national reserves. Bauxite reserves with...

AI Technical Summary

Problems solved by technology

[0016] On the surface, the process flow is a classification-flotation process where the two operations of classification and flotation are interchanged, but the coarse particles will still pass through the flotation operation, so the chemical consumption is greater than that of the classification-flotation process.

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