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

A technology of low-grade bauxite and mineral processing methods, applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of large consumption of chemicals and achieve low production costs, stable operation, and stable indicators

Inactive Publication Date: 2005-04-06
NORTHEASTERN UNIV
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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 t

Method used

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

Examples

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Example

[0047] Example 1: Use a ball mill to grind the crushed raw materials. The working conditions of the ball mill are as follows: the size of the ball mill is Φ305×305mm, the wet type ball mill is used to grind the ore, the spherical medium diameter and ratio are Φ30mm: Φ20mm: Φ15mm = 30%: 50%: 20%, the medium filling rate is 40%, and the material-to-ball ratio is 1.2, the rotating speed is 91%, the grinding weight concentration is 70%, the grinding time is 8min, and the grinding fineness reaches -200 mesh accounting for 48.22%. The obtained product is prepared into a slurry with a weight concentration of 30%, which is classified by a hydrocyclone to control d 50 It is 0.11mm. The structure and operating parameters of the hydrocyclone are as follows: diameter 50mm, feeding port diameter 10mm, overflow pipe diameter 13mm, grit port diameter 6mm, cone angle 20°, feeding pressure 0.06MPa, here Under the conditions, the ratio of aluminum to silicon is 9.18, the yield is 43.34%, and the 2 ...

Example

[0048] Example 2: Grinding fineness -200 mesh accounts for 52.55%, the grinding product is prepared into a slurry with a weight concentration of 40%, the ore feed pressure of the hydrocyclone for classification operation is 0.09MPa, and the weight concentration of the ore is 40%; The feed pressure of the hydrocyclone for thickening operation is 0.12MPa, the feed weight concentration is 30%; the weight concentration of flotation slurry is 35%, the flotation time is 8min, the collector uses sodium oleate, and the amount is 825g / t raw ore; dispersant Sodium carbonate is used at 1.8kg / t raw ore to obtain flotation concentrate. Other conditions are the same as in Example 1, the aluminum to silicon ratio is 9.47, the yield is 43.23%, and Al 2 O 3 The recovery rate of the coarse-grained concentrate is 47.89%, and the Al-Si ratio of the mixed concentrate is 9.38, Al 2 O 3 The recovery rate was 88.56%.

Example

[0049] Example 3: Grinding fineness -200 mesh accounted for 54.96%, the grinding products were prepared into 50% weight concentration of ore slurry, grading operation, the feed pressure of the hydrocyclone was 0.12MPa, and the feed weight concentration was 50%; 、The feeding pressure of the hydrocyclone for concentration operation is 0.16MPa, and the feeding weight concentration is 20%; the weight concentration of flotation slurry is 40%, and the flotation time is 10min. The collector adopts a mixture of oxidized paraffin soap and sodium oleate (oxidized paraffin). Soap: sodium oleate=1:1, weight ratio), the dosage is 1000g / t raw ore; the dispersant uses sodium carbonate, the dosage is 2.0kg / t, to obtain the flotation concentrate. Other conditions are the same as in Example 1. The aluminum to silicon ratio is 9.28, the yield is 43.52%, and Al 2 O 3 Coarse-grained concentrate with a recovery rate of 47.16%, the Al-Si ratio of the mixed concentrate is 9.57, Al 2 O 3 The recovery rate...

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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...

Claims

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Application Information

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IPC IPC(8): B02C17/00B02C19/16B03B5/34B03B7/00B03D1/002
Inventor 韩跃新王泽红袁致涛印万忠于福家
Owner NORTHEASTERN UNIV
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