Treatment method for use in production of cement filler by using alkali leaching slag from vanadium stone coal alkali leaching

A treatment method and an alkali leaching technology are applied in the field of comprehensive utilization of alkali leaching residues, which can solve problems such as environmental pollution by alkali leaching residues, and achieve the effects of improving comprehensive utilization benefits, improving extraction rate and increasing benefits.

Inactive Publication Date: 2012-07-25
台泥(怀化)水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above disadvantages and provide a method for using the alkali leaching slag of vanadium from stone coal alkali leaching as cement filler. The problem of environmental pollution caused by alkali leaching slag produced by vanadium extraction has also solved the raw materials for cement production nearby, and improved the vanadium extraction rate of vanadium extraction by alkali leaching of stone coal blank roasting and the comprehensive utilization benefits of stone coal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The treatment method of alkali leaching residue of alkali leaching vanadium from stone coal used as cement filler includes the following steps:

[0014] a. Routinely filter the alkali leaching slurry of stone coal roasting and alkali leaching vanadium to obtain filtrate and alkali leaching residue;

[0015] b. Extract vanadium from the filtrate obtained in step a, add the alkali leaching residue obtained in step a to industrial concentrated sulfuric acid to a pH of 3, soak for 40 minutes, and filter to obtain filtrate and acidified residue;

[0016] c. The filtrate obtained in step b is subjected to vanadium extraction, and the acidified slag obtained in step b is conventionally treated according to the requirements of cement filler, and then used as a cement filler.

Embodiment 2

[0018] The treatment method of alkali leaching residue of alkali leaching vanadium from stone coal used as cement filler includes the following steps:

[0019] a. Routinely filter the alkali leaching slurry of stone coal roasting and alkali leaching vanadium to obtain filtrate and alkali leaching residue;

[0020] b. Extract vanadium from the filtrate obtained in step a, add the alkali leaching residue obtained in step a to industrial concentrated sulfuric acid to pH 2, soak for 50 minutes, and filter to obtain filtrate and acidified residue;

[0021] c. The filtrate obtained in step b is subjected to vanadium extraction, and the acidified slag obtained in step b is conventionally treated according to cement filler requirements, and then used as cement filler.

Embodiment 3

[0023] The treatment method of alkali leaching residue of alkali leaching vanadium from stone coal used as cement filler includes the following steps:

[0024] a. Routinely filter the alkali leaching slurry of stone coal roasting and alkali leaching vanadium to obtain filtrate and alkali leaching residue;

[0025] b. Extract vanadium from the filtrate obtained in step a, add the alkaline leaching residue obtained in step a to industrial concentrated sulfuric acid to a pH value of 4, soak for 30 minutes, and filter to obtain the filtrate and acidified residue;

[0026] c. The filtrate obtained in step b is subjected to vanadium extraction, and the acidified slag obtained in step b is conventionally treated according to cement filler requirements, and then used as cement filler.

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Abstract

The invention discloses a treatment method for use in production of cement filler by using alkali leaching slag from vanadium stone coal alkali leaching. In order to overcome the defect that the method for treating the alkali leaching slag of the stone coal alkali leaching vanadium serving as the cement filler lacks in the prior art, the method comprises the following steps of: filtering alkali leaching slurry produced by stone coal blank roasting alkali leaching vanadium, extracting vanadium from the obtained filtered solution, acidifying and filtering the obtained alkali leaching slag, and extracting the vanadium from the obtained filtered solution, wherein the acidified slag is used as the cement filler. The treatment method for use in production of cement filler by using alkali leaching slag from vanadium stone coal alkali leaching has simple and practical process and good benefit, solves the problem of environmental pollution caused by the alkali leaching slag produced by the stone coal blank roasting alkali leaching vanadium, and greatly improves the extraction rate of the stone coal blank roasting alkali leaching vanadium and the comprehensive utilization benefit of stone coal. A factory for annually producing 1,500 tons of stone coal alkali leaching vanadium pentoxide can annually increase the benefit by 15 million yuan.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of alkali leaching slag (by-product) produced by alkaline leaching of vanadium from stone coal blank roasting, in particular to a method for treating the alkali leaching slag of vanadium from stone coal alkali leaching as cement filler. Background technique [0002] The existing stone coal sodium roasting and acid leaching vanadium extraction process has only 40% extraction rate for some stone coal mines. For this reason, the applicant has invented a new technology for stone coal blank roasting and alkali leaching of vanadium (application number 2008100313918), which makes the stone coal The extraction rate of vanadium in coal has reached more than 70%. The new technology of vanadium leaching with blank roasting of stone coal also produces a large amount of alkali leaching residue, which not only occupies land and causes environmental pollution, but also leaves a certain amount of vanadium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/147C22B34/22
CPCY02P40/10
Inventor 彭忠喜
Owner 台泥(怀化)水泥有限公司
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