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

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 ...

AI Technical Summary

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, which overcomes the shortcomings of the prior art, such as low extraction rate and chlorine pollution; In the vanadium extraction process, filtrates containing a large amount of silica are also produced. There is no mature process for extracting white carbon black from them in the prior art. If these filtrates are directly used as cement raw materials, it will cause high value-added carbon dioxide. The waste of silicon; and in-line is both a waste and pollute the environment