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Method for processing alumina process calcium silicone slag

A processing method and technology of calcium-silica slag, which are applied in the purification of aluminate/alumina/aluminum hydroxide, preparation of alkali metal aluminate/alumina/aluminum hydroxide, calcium carbonate/strontium/barium, etc., can solve the problem. The sintering method increases the energy consumption, increases the burden of the clinker kiln, and the large circulation volume of materials, etc., to reduce the energy consumption, improve the equipment capacity and utilization rate, and reduce the dilution effect.

Active Publication Date: 2011-05-04
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method of processing calcium-silicon slag is to feed the batching process, make raw slurry and then return to the clinker kiln for sintering, resulting in a large amount of material circulation, increasing the burden on the clinker kiln, and also increasing the energy consumption of the sintering method. Reduced production capacity

Method used

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  • Method for processing alumina process calcium silicone slag
  • Method for processing alumina process calcium silicone slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add the calcium silicon slag to the carbon mother liquor with a total alkali concentration of 100g / l, the carbon mother liquor and the calcium silicon slag have a liquid-to-solid weight ratio of 3, and a gas with a volume concentration of 30% of carbon dioxide is introduced at a temperature of 60°C. After reacting for 30 minutes, the reaction product is separated; part of the seminal fluid is used as a liquid spray to flush the reaction slag and sent to the deep desiliconization tank; the reacted solution is sent to the adjustment tank of the clinker dissolution process for recovery.

Embodiment 2

[0015] Add the calcium silicon slag to the carbon mother liquor with a total alkali concentration of 120g / l. The carbon mother liquor and the calcium silicon slag have a liquid-to-solid weight ratio of 5, and the volume concentration of carbon dioxide is 35%. After reacting for 80 minutes, the reaction product is separated; part of the seminal fluid is used as a liquid spray to flush the reaction slag and sent to the deep desiliconization tank; the reacted solution is sent to the adjustment tank of the clinker dissolution process for recovery.

Embodiment 3

[0017] The calcium silicon slag is added to the carbon mother liquor whose total alkali concentration is 150g / l, the carbon mother liquor and the calcium silicon slag are 10 according to the liquid-solid weight ratio, and the gas whose volume concentration is 40% is passed into the carbon dioxide, and the feeding amount of the gas is Calculated according to the processing capacity, react at 120°C for 120 minutes, and separate the reaction product; use part of the semen as a liquid spray to flush the reaction slag and send it to the deep desiliconization tank; send the reacted solution to the clinker for dissolution Process adjustment tank for recycling.

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Abstract

The invention relates to a method for processing alumina process calcium silicone slag, relating to a method for processing calcium silicone slag during the alumina production process by a sintering method or a mixed combination method. The method is characterized by comprising the following steps of: adding the calcium silicon slag into a spent carbonated liquor, adding a carbon dioxide gas for reaction, leading the alumina in the calcium silicon slag to generate a sodium aluminate solution and enter the spent carbonated liquor; and adding the separated calcium carbonate slag after reaction into a deep desilication process. The method not only reduces the massive circulation of the calcium silicon slag in the alumina process, improves the productivity and utilization ratio of the equipment, but also reduces the usage quantity of the lime, the dilution to the consistency of the solution and the energy consumption.

Description

technical field [0001] The invention discloses a method for treating calcium-silicon slag in an alumina process, and relates to a method for treating calcium-silicon slag in alumina production by a sintering method or a combined method. Background technique [0002] In the process of producing alumina by sintering method or hybrid method, milk of lime is added to the sintering method solution during deep desiliconization for desiliconization, and the solid product after desiliconization is called calcium silicate slag. The existing method of processing calcium-silicon slag is to feed the batching process, make raw slurry and then return to the clinker kiln for sintering, resulting in a large amount of material circulation, increasing the burden on the clinker kiln, and also increasing the energy consumption of the sintering method. Reduced production capacity. Contents of the invention [0003] The purpose of the present invention is to address the deficiencies in the abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/04C01F11/18C01F7/46
CPCY02P20/141
Inventor 王继永王军
Owner GUIZHOU BRANCH CHINA ALUMINUM IND