Method for preparing white carbon black by cutting zirconium silicon slag

Abstract

The invention discloses a method for preparing white carbon black by cutting zirconium silicon slag. The method comprises the following steps: 1) activating zirconium silicon slag, placing the zirconium silicon slag in a rotary type dryer, drying at 130-150 DEG C for 1-2 hours, and cooling to 20-30 DEG C; 2) ultrasonically crushing the zirconium silicon slag and activating the zirconium silicon slag; 3) after the zirconium silicon slag is activated, adding water of which the size is 3-4 times that of solid, and a dispersant NH4CL with the solid mass fraction of 1%, and repeatedly scrubbing 3-4times, so as to fully melt the zirconium silicon slag; 4) adding NaOH to silica sol, stirring, and carrying out centrifugal separation for 3 times to obtain a neutral solution, so as to obtain hydrated silica; and 5) calcining hydrated silica prepared in the step 4) at 630-660 DEG C and pulverizing to obtain white carbon black. The method provided by the invention is characterized in that NaOH isadded to adjust the pH to 9, and the zirconium silicon slag is cleaned to effectively reduce the stability of SIO2 colloid and reduce the probability that impurities enter white carbon black.

Description

technical field [0001] The invention relates to the technical field of white carbon black preparation, in particular to a method for preparing white carbon black by cutting zirconium silicon slag. Background technique [0002] White carbon black is a general term for fine powder or ultrafine particle anhydrous and hydrous silica or silicate, and is a white, non-toxic, amorphous fine powder. Its SiO 2 The content is relatively large, and the original particle size is generally 10-40nm. Because the surface contains more light groups, it is easy to absorb water and become aggregated fine particles. The relative density of white carbon black is 2.319-2.653g / cm 3 , with a melting point of 1750°C. Insoluble in water and acid, soluble in strong alkali and hydrofluoric acid. It has excellent characteristics such as porosity, large internal surface area, high dispersion, light weight, good chemical stability, high temperature resistance, non-combustibility, non-toxic and tasteles...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for preparing white carbon black by cutting zirconium-silicon slag. In view of the existing method for preparing white carbon black, due to the low activity of zirconium-silicon slag, impurity ions cannot be effectively removed during the preparation of white carbon black. Affecting the quality of white carbon black, this technical scheme uses zirconium silicon slag—rotary drying—ultrasonic crushing—activated zirconium silicon slag—stirring—silica sol—cation exchange—anion exchange—washing, centrifugal separation—hydrated silica—calcination —Tooth crushing—white carbon black, which can effectively improve the quality of white carbon black

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