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Comprehensive beneficiation and quality improvement method under a condition that bauxite is difficult to utilize

A bauxite, upgrading technology, applied in chemical instruments and methods, alumina/aluminum hydroxide, magnetic separation, etc., can solve the problem of low added value, difficult to use bauxite comprehensive beneficiation and upgrading methods, ore utilization efficiency Low and other problems, to achieve the effect of short time, low ore utilization efficiency and high utilization rate

Pending Publication Date: 2022-01-04
ZUNYI ENERGY & MINERAL INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for comprehensive beneficiation and upgrading of refractory bauxite to solve the problems of low ore utilization efficiency and low added value in the background technology

Method used

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  • Comprehensive beneficiation and quality improvement method under a condition that bauxite is difficult to utilize

Examples

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Effect test

Embodiment 1

[0019] Such as figure 1 Shown, a kind of refractory bauxite comprehensive beneficiation and upgrading method of the present invention comprises the following steps:

[0020] (1) After the raw ore is crushed and ground to a particle size of 150 mesh ore content ≥ 70%, it is fed into the preheater through the feeder, and the ore powder is preheated to 200°C, and then enters the suspension roasting furnace at 600 Roasting at ℃, and keep for 5s to complete desulfurization, the high-temperature ore powder after roasting and desulfurization is cooled to below 100℃ by cyclone cooler to obtain desulfurization concentrate;

[0021] (2) Add the desulfurized concentrate obtained in step (1) into a leaching tank filled with caustic soda with an alkali concentration of 80g / L, adjust the liquid-solid ratio to 6:1, and leaching at a temperature of 90°C for 10 minutes to obtain leach slurry;

[0022] (3) performing solid-liquid separation on the leaching slurry obtained in step (2) to obtai...

Embodiment 2

[0026] Such as figure 1 Shown, a kind of refractory bauxite comprehensive beneficiation upgrading method comprises the following steps:

[0027] (1) After crushing and grinding the raw ore until the particle size is 180 mesh, the content of fine ore is ≥ 70%, and then feed it into the preheater through the feeder, preheat the ore powder to 250 ° C, and then enter the suspension roasting furnace at 800 Roasting at ℃, and keep for 8s to complete desulfurization, the high-temperature ore powder after roasting and desulfurization is cooled to below 100℃ by cyclone cooler to obtain desulfurization concentrate;

[0028] (2) Add the desulfurized concentrate obtained in step (1) into a leaching tank filled with caustic soda with an alkali concentration of 120g / L, and adjust the liquid-solid ratio to 8:1, and leaching at a temperature of 92°C for 20 minutes to obtain leach slurry;

[0029] (3) performing solid-liquid separation on the leaching slurry obtained in step (2) to obtain a ...

Embodiment 3

[0033] Such as figure 1 Shown, a kind of refractory bauxite comprehensive beneficiation upgrading method comprises the following steps:

[0034] (1) After the raw ore is crushed and ground to a particle size of 200 mesh ore content ≥ 70%, it is fed into the preheater through the feeder, and the ore powder is preheated to 300°C, and then enters the suspension roasting furnace at 950 Roasting at ℃, and keep for 10s to complete desulfurization, the high-temperature ore powder after roasting and desulfurization is cooled to below 100℃ by cyclone cooler to obtain desulfurization concentrate;

[0035] (2) Add the desulfurized concentrate obtained in step (1) into a leaching tank filled with caustic soda with an alkali concentration of 150g / L, and adjust the liquid-solid ratio to 10:1, and leaching at a temperature of 95°C for 30 minutes to obtain leach slurry;

[0036] (3) performing solid-liquid separation on the leaching slurry obtained in step (2) to obtain a desiliconized conc...

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Abstract

The invention relates to the technical field of bauxite beneficiation, in particular to a comprehensive beneficiation and quality improvement method under a condition that bauxite is difficult to utilize. The method comprises the following steps: (1) crushing and grinding raw ore until the ore content is greater than or equal to 70%, feeding into a preheater through a feeder, preheating, roasting in a suspension roaster, keeping for 5-10 seconds to complete desulfurization, and cooling high-temperature ore powder after roasting desulfurization to 100 DEG C or below through a cyclone cooler to obtain desulfurized concentrate; (2) adding the desulfurized concentrate into a leaching tank containing alkali liquor, adjusting the liquid-solid ratio, conducting leaching at the high temperature, and obtaining leaching slurry; (3) carrying out solid-liquid separation on the leaching slurry to obtain desiliconized concentrate and a high-silicon solution, and carrying out desiliconization on the high-silicon solution to obtain circulating alkali liquor and silicon slag; (4) adding water into the desilicication concentrate to prepare ore pulp; and then adding into a wet magnetic separator, and carrying out magnetic separation iron removal according to the set magnetic field intensity, magnetic medium, pulsation stroke and pulsation frequency to obtain bauxite concentrate and magnetic substances. The method solves the problems of low ore utilization efficiency and low additional value.

Description

technical field [0001] The invention relates to the technical field of bauxite beneficiation, in particular to a method for comprehensive beneficiation and upgrading of refractory bauxite. Background technique [0002] my country is the largest country in alumina production, but my country's bauxite resource reserves only account for about 3% of the global bauxite resource reserves, and the dependence on foreign ore is nearly 60%. With the continuous development and utilization of resources, domestic high-grade ore Gradually exhausted, most of the existing ores have one or a combination of high sulfur, high silicon, and high iron characteristics, which are difficult to meet the requirements of downstream industries, and the utilization is difficult, resulting in low ore utilization efficiency and low added value. In order to improve the comprehensive utilization rate and added value of refractory bauxite ore, a method for comprehensive beneficiation and quality improvement of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/02C01F7/02
CPCB03C1/02C01F7/02
Inventor 周剑飞何伟石治均程小春周颖
Owner ZUNYI ENERGY & MINERAL INVESTMENT CO LTD
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