Method for extracting white carbon black from shale vanadium extraction tailing residue

Abstract

The invention provides a method for extracting white carbon black from shale vanadium extraction tailing residue. The method comprises: (1) mixing vanadium extraction tailing residue, a solid alkali and water to obtain a residue slurry, wherein a mass ratio of the solid alkali to the vanadium extraction tailing residue is 0.9-2:1, and a solid-liquid ratio is 1:4-10; (2) heating the obtained residue slurry to a temperature of 120-180 DEG C, and controlling the reaction time at 60-150 min; (3) after completing the reaction, filtering to obtain a filtrate and filter residue, and adjusting the pHvalue of the filtrate to 6-10 to obtain a silica gel; and (4) drying and grinding the obtained silica gel to obtain white carbon black. According to the present invention, the silica leaching rate canbe up to 95.2%, the reaction time can be greatly shortened, and can be within 60-150 min, the SiO2 content in the product can reach more than 92.8%, and the main content of the product reaches the industry standard.

Description

technical field [0001] The invention relates to the technical field of stone coal extraction and resource comprehensive utilization, in particular to a method for extracting white carbon black from shale vanadium extraction tailings. Background technique [0002] White carbon black is amorphous silicon dioxide. Also known as hydrated silica. Molecular formula is SiO 2 ·nH 2 O. It is a white, non-toxic, amorphous fine powder. It has excellent properties such as porosity, high dispersion, light weight, good chemical stability, high temperature resistance, non-combustibility and good electrical insulation. Silica is mainly used as a reinforcing agent and modifier in the rubber industry, and its reinforcing effect is better than other reinforcing fillers other than carbon black. Silica is also a raw material for industries such as plastics, papermaking, pesticides, coatings, and inks. At present, the manufacturing methods of white carbon black are divided into gas phase m...

AI Technical Summary

Problems solved by technology

However, it is inappropriate to directly apply this process to the vanadium extraction tailings from vanadium shale, because the vanadium extraction tailings from vanadium shale are obtained from the shale vanadium extraction process, and there is an alkali leaching process in the shale vanadium extraction process Therefore, the silicon that is easy to enter and exit has been leached in the previous process, and the rest is silicon that is difficult to leach

Therefore, there are problems of long production time and low leaching rate of silica products

Images