White carbon black prepared from industrial waste slag and production technology thereof
A light silica and production process technology, applied in the direction of silicate, alkali metal silicate, alkaline earth metal silicate, etc., can solve the problems of large consumption of soda ash and sulfuric acid, high cost, etc., and achieve reduction of production cost recovery Effect
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[0007] The present invention is realized in this way: the raw material quartz sand, calcium sulfate and carbon (has been pulverized) are mixed according to the ratio of SiO2:Na2SO4:C=100:81.4:6.5, and are continuously put into a horseshoe-shaped full-insulation kiln, and the reaction temperature is 1420°C-1450°C , continuous discharge, the material is water quenched and dissolved to obtain 3.5M, 29Be' water glass liquid. Add 2.5L of bottom water to a 5L reaction kettle, pre-add 0.075L of water glass and heat to 86°C, within 100 minutes, add 1.163L of water glass solution and 0.072L of sulfuric acid at the same time, after the reaction, add 0.011L Adjust the pH to 4.5 after post-acid. Gained material was washed and dried to obtain 348.1g of calcium silicate (BET is 185m2 / g), and the solution was concentrated and dried to obtain 235.14g of calcium sulfate.
[0008] Wherein, in the process of generating calcium silicate, the washing solution after washing is concentrated and dri...
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