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Method for preparing polysilicate aluminium molten iron processing agent using bauxite gangue

A technology of polyaluminum silicate and water treatment agent, which is applied in the fields of aluminum silicate, flocculation/precipitation water/sewage treatment, silicate, etc., and can solve the problems of large gaps and single varieties

Inactive Publication Date: 2007-07-11
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the flocculant products in my country are crude products with a single variety, which can no longer meet the needs of urban and industrial water treatment in my country, especially for the continuous growth of urban and industrial water in the future, as well as the demand for the reuse of urban sewage and industrial wastewater. The gap is large and has a huge application market prospect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The roasting temperature of the tailings is 600°C, and the roasting time is 2h. The roasted tailings were leached with 30g / L oxalic acid, the leaching temperature was 70°C, and the leaching time was 2h. The acid-dissolved filter residue was dissolved with 30 g / L sodium hydroxide, the dissolution temperature was 150° C., and the dissolution time was 2 hours. The water glass produced in the alkali dissolution process was diluted to 3%, the pH was adjusted to 3 with sulfuric acid, the polymerization time was 2 hours, and the polymerization temperature was room temperature. The aluminum salt solution obtained in the acid dissolution process is added to the polysilicate to prepare the polysilicate aluminum salt water treatment agent. When the polyaluminosilicate water treatment agent prepared under this condition is used for converter dedusting wastewater (wastewater SS is 2500mg / L), when the dosage is 80mg / L, the SS after raw water treatment is reduced to 100mg / L.

Embodiment 2

[0020] The roasting temperature of the tailings is 700°C, and the roasting time is 5h. The roasted tailings were leached with 50g / L oxalic acid, the leaching temperature was 85°C, and the leaching time was 6h. The acid-dissolved filter residue was dissolved with 50g / L sodium hydroxide, the dissolution temperature was 200°C, and the dissolution time was 6h. The water glass produced in the alkali dissolution process was diluted to 6%, the pH was adjusted to 5 with sulfuric acid, the polymerization time was 4 hours, and the polymerization temperature was room temperature. The aluminum salt solution obtained in the acid dissolution process is added to the polysilicate to prepare the polysilicate aluminum salt water treatment agent. The polyaluminosilicate water treatment agent prepared under this condition is used in converter dedusting wastewater (wastewater SS is 2500mg / L). When the dosage is 80mg / L, the SS after raw water treatment is reduced to 90mg / L.

Embodiment 3

[0022] The roasting temperature of the tailings is 650°C, and the roasting time is 4h. The roasted tailings were leached with 40g / L oxalic acid, the leaching temperature was 80°C, and the leaching time was 4h. The acid-dissolved filter residue was dissolved with 40g / L sodium hydroxide, the dissolution temperature was 200°C, and the dissolution time was 4h. The water glass produced in the alkali dissolution process was diluted to 5%, the pH was adjusted to 4 with sulfuric acid, the polymerization time was 3 hours, and the polymerization temperature was room temperature. The aluminum salt solution obtained in the acid dissolution process is added to the polysilicic acid to prepare the polysilicate aluminum salt water treatment agent. When the polyaluminosilicate water treatment agent prepared under this condition is used for converter dedusting wastewater (wastewater SS is 2500mg / L), when the dosage is 80mg / L, the SS after raw water treatment is reduced to 80mg / L.

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Abstract

The invention discloses a making method of bauxite tailing disposing and aluminium polysilicate molten iron disposing agent, which comprises the following steps: adopting bauxite tailings as raw material; sintering; immersing in the acid; dissolving in the alkali; polymerizing polysilicate acid; adding aluminium salt solution in the polysilicate acid to obtain the product.

Description

technical field [0001] A method for preparing polyaluminum silicate hot metal treatment agent by utilizing bauxite tailings, relating to a preparation method of bauxite tailings treatment and polyaluminum silicate hot metal treatment agent, Background technique [0002] The vast majority of bauxite in my country belongs to diaspore (accounting for more than 98%). This type of ore has the characteristics of high aluminum, high silicon, low aluminum-silicon ratio, fine crystal grain size, and complex intercalation. Most of the production of alumina is by hybrid method, sintering method and other processes, which have long process, high energy consumption and high production cost. Therefore, the use of beneficiation and desiliconization of bauxite to increase the aluminum-silicon ratio of the ore has become the development trend of the alumina industry, but it is accompanied by the production of tailings rich in silicon such as kaolinite, illite, and pyrophyllite. How to ratio...

Claims

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Application Information

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IPC IPC(8): C01B33/26C02F1/52
Inventor 李军亮周吉奎李花霞曹慧军
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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