Technique for extracting titanium slag form red mud

A technology of red mud and titanium slag, applied in the field of light metal metallurgy, can solve the problems of uneconomical, ineffective enrichment and recovery, etc., and achieve the effects of environmental protection, easy control of technical parameters, and low production cost

Active Publication Date: 2007-10-17
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (3) Precious metals such as scandium, zirconium, thorium, and gallium rich in red mud will not be effectively enriched and recovered with the treatment of concentrated acid solution, which is very uneconomical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The method for extracting titanium slag from red mud of the present invention has the following steps:

[0036] (1) The composition of red mud is selected to be 20% of total iron mass content, TiO 2 The mass content is 25%. After fully washing, dry and crush, the particle size (d50) is: 40um. The reducing agent is graphite, and the addition amount is 1.1 times of the theoretical carbon content. Control 70% particle size (d50) control is preferably: 80um, 30% particle size of 1-3mm particle graphite. After the red mud is mixed with 70% of the graphite powder, it is extruded into blocks for later use.

[0037] (2) Then add it to a three-electrode steelmaking electric arc furnace with a slag outlet for smelting and iron removal. First add 15% graphite powder to the bottom of the furnace, and then add the mixture of red mud with carbon material and granular carbon particles. The way of arc melting, the controlled polar circle power density: 1200-1800A / m 2 Fluctuation, ...

Embodiment 2

[0043] The method for extracting titanium slag from red mud of the present invention has the following steps:

[0044] (1) The composition of red mud is selected to be 10% of total iron mass content, TiO 2 The mass content is 10%. After fully washing, it is dried and crushed, and the particle size (d50) is: 90um. The reducing agent is graphite, and the addition amount is 1.2 times of the theoretical carbon content. Control 80% particle size (d50) control is preferably: 120um, 20% particle size of 1-3mm particle graphite. After the red mud is mixed with 70% of the graphite powder, it is made into balls for later use.

[0045] (2) Same as Example 1, except that 10% graphite powder is added to the bottom of the furnace first, and the smelting state is maintained until the red mud material is melted, and then the remaining 20% ​​graphite powder is added for deep smelting and slagging.

[0046] (3) With embodiment 1.

[0047] (4) With embodiment 1, difference is that the contr...

Embodiment 3

[0051] The method for extracting titanium slag from red mud of the present invention has the following steps:

[0052] (1) The composition of red mud is selected to be 28% of total iron mass content, TiO 2 The mass content is 29%. After fully washing, it is dried and crushed, and the particle size (d50) is: 70um. The reducing agent is coke, and the addition amount is 1.1 times of the theoretical carbon content. Control 70% particle size (d50) control is preferably: 140um, 30% granular coke with a particle size of 1-3mm. After the red mud is mixed with 70% of the coke powder, it is made into balls for later use.

[0053] (2) Same as Example 1, except that 13% coke powder is added to the bottom of the furnace first, and the smelting state is maintained until the red mud material is melted, and then the remaining 17% coke powder is added for deep smelting and slagging.

[0054] (3) with embodiment 1.

[0055] (4) With embodiment 1, difference is that the control granularity ...

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Abstract

A technical handling method of cuprum wires cross relates to the annealing process of cuprum wires cross and comprises the following steps: putting cuprum wires cross into a annealing furnace, pumping air in the furnace to form negative-pressure in the furnace, filling the furnace with carbon dioxide protective gas; performing a heating treatment of two stages under pressure, performing a gas releasing decompression processing between stages, then cooling-down slowly in the furnace for 0.3-1 hour, and opening the furnace to cool-down naturally to atmospheric temperature. Therefore, electrical soft wires cross through such annealing treatment has brightening surfaces and excellent finish, without greasy dirt or other soils; exhibits uniform flexibility and strong antioxidant ability, and can be stored for a long time.

Description

technical field [0001] The invention relates to a process for extracting titanium slag from red mud, which is a treatment method for waste in the process of producing alumina by alkaline method, and belongs to the technical field of light metal metallurgy. Background technique [0002] Red mud is the waste produced in the process of extracting alumina from bauxite. It is named for its red mud. With the continuous development of the aluminum industry, the world currently produces about 60 million tons of red mud every year, and the discharge of red mud in my country is more than 4.5 million tons per year. Most of the alumina plants in the world pile up or pour red mud into the deep sea. The storage of red mud not only takes up a lot of land and farmland, but also consumes more yard construction and maintenance costs, and the remaining lye in the red mud goes to the sea. Underground seepage, causing groundwater pollution. In addition, the dust formed by the red mud in the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/12C21B13/00C21B3/06C22B3/06C21C5/52
CPCY02P10/20Y02W30/50
Inventor 高建阳
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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