Process for extracting white carbon black in alkaline-leaching and vanadium extraction of stone coal

A technology of white carbon black and stone coal alkali, applied in the direction of improving process efficiency, silicon dioxide, silicon oxide, etc., can solve the problems of direct exhaust waste, chlorine pollution, environmental pollution and other problems

Inactive Publication Date: 2010-09-15
台泥(怀化)水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing technology for extracting vanadium from stone coal is the sodium roasting acid invasion process, which has the disadvantages of low extraction rate, chlorine gas emission pollution, silicon dioxide accounting for 70% of stone coal is discharged as industrial waste residue and pollutes the environment; The vanadium extraction technology of coal-free sodium-free blank caustic soda leaching is an innovative process of the applicant for the prior art, whic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The process of extracting white carbon black in vanadium leaching from stone coal includes the following steps:

[0013] a. In the roasted stone coal, add 5% by mass industrial alkali, soak at 80°C for 4 hours, and routinely filter to obtain the leachate;

[0014] b. Put the leachate obtained in step a into a white carbon black reactor and heat it to 80°C, while adding concentrated sulfuric acid to adjust the pH to 5.5, and stirring for 1 hour;

[0015] c. The emulsion obtained in step b is conventionally filtered by pressure, while hot water at 70°C is passed into the filter press to wash the filter cake.

[0016] d. Extract vanadium from the filtrate and washing liquid obtained in step c, and the obtained filter cake is conventionally pulped and spray-dried to obtain white carbon black.

Embodiment 2

[0018] The process of extracting white carbon black in vanadium leaching from stone coal includes the following steps:

[0019] a. Add industrial alkali with a mass ratio of 3% to the roasted stone coal, soak at 95°C for 5 hours, and obtain the leachate by conventional filtration;

[0020] b. Put the leachate obtained in step a into a white carbon black reactor and heat it to 80°C, while adding concentrated sulfuric acid to adjust the pH to 5, and stirring for 1.5 hours;

[0021] c. The emulsion obtained in step b is conventionally filtered by pressure, while hot water at 65°C is passed into the filter press to wash the filter cake.

[0022] d. Extract vanadium from the filtrate and washing liquid obtained in step c, and the obtained filter cake is conventionally pulped and spray-dried to obtain white carbon black.

Embodiment 3

[0024] The process of extracting white carbon black in vanadium leaching from stone coal includes the following steps:

[0025] a. Add industrial alkali with a mass ratio of 7% to the roasted stone coal, soak at 65°C for 3 hours, and routinely filter to obtain the leachate;

[0026] b. Put the leachate obtained in step a into a white carbon black reactor and heat to 75°C, while adding concentrated sulfuric acid to adjust the pH to 6, and stirring for 0.5 hours;

[0027] c. The emulsion obtained in step b is conventionally filtered by pressure, while hot water at 75° C. is passed into the filter press to wash the filter cake.

[0028] d. Extract vanadium from the filtrate and washing liquid obtained in step c, and the obtained filter cake is conventionally pulped and spray-dried to obtain white carbon black.

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Abstract

The invention discloses a process for extracting white carbon black in alkaline-leaching and vanadium extraction of stone coal, which aims at solving the problem that no mature process for extracting white carbon black from filter residues of the stone coal, which are subjected to sodium-free blank roasting, alkaline leaching and vanadium extraction, exists at present. The process comprises the following steps of: carrying out sodium-free blank roasting on the stone coal, adding 3-7% of industrial alkali, soaking for 3-5 hours at 65-95 DEG C, putting the obtained lixivium to a white carbon black reaction kettle, heating to 75-85 DEG C, simultaneously adding concentrated sulfuric acid to adjust the pH to 5-6, stirring and maintaining for 0.5-1.5 hours, carrying out conventional pressure filtration, simultaneously introducing hot water of 65-75 DEG C, conventionally pulping the obtained filter cake, carrying out spray drying to obtain the white carbon black, and carrying out vanadium extraction on the obtained filtrate and water washing liquid. The invention is used for extracting the white carbon black from the filter residues of the stone coal, which are subjected to sodium-free blank roasting, alkaline leaching and vanadium extraction, has the advantages of simple and convenient process, high extraction yield, good benefit and no environmental pollutant emission, and realizes the comprehensive development and cyclic utilization of the stone coal.

Description

Technical field [0001] The invention relates to a process for extracting white carbon black in vanadium leaching from stone coal. Background technique [0002] The main component of stone coal is silica, which is a polymetallic associated mine. Because of its large reserves and difficult utilization, it is recognized by the state as a comprehensive utilization resource enjoying tax incentives. [0003] The existing technology for extracting vanadium from stone coal is the sodium roasting and acid ingress process. This process has disadvantages such as low extraction rate, chlorine emission pollution, and 70% of stone coal’s silica, which is discharged as industrial waste residue and pollutes the environment; The technology for extracting vanadium from sodium-free blank fusion caustic soda leaching is an innovative process of the applicant for the prior art, which overcomes the disadvantages of low extraction rate and chlorine pollution in the prior art; In the vanadium extraction ...

Claims

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Application Information

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IPC IPC(8): C01B33/12C22B3/12C22B34/22
CPCY02P10/20
Inventor 彭忠喜
Owner 台泥(怀化)水泥有限公司
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