High pure white carbon black produced by utilizing industrial silicon byproduct silica fume and production method of high pure white carbon black

Abstract

The invention discloses high pure white carbon black produced by utilizing industrial silicon byproduct silica fume and a production method of the high pure white carbon black. The method comprises the concrete steps of roasting the silica fume to remove organic impurities such as coal tar, reacting with caustic soda liquid to obtain a water glass mother liquor, and filtering to obtain high-pure water glass; adding a sulfuric acid impurity removal agent into sulfuric acid, reacting for precipitating metal and heavy metal in the sulfuric acid, and filtering to obtain refined sulfuric acid; adding water into the high-pure water glass so as to prepare into an alkaline base solution, enabling the water glass and the sulfuric acid to parallelly flow into the base solution, and reacting to obtain suspension slurry; filtering, washing, pulping and drying the suspension slurry to obtain the high pure white carbon black. According to the high pure white carbon black produced by utilizing industrial silicon byproduct silica fume and the production method thereof provided by the invention, the high pure white carbon black is produced by adopting the industrial solid waste silica fume as a silicon source, so that the solid waste is recycled, and the process is simple and reasonable and low-cost, and has better economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of white carbon black production, and more specifically relates to a high-purity white carbon black produced by utilizing industrial silicon by-product micro-silica powder and a production method thereof. Background technique [0002] High-purity silica is generally used in special fields such as medicine, food, cosmetics, coatings, high-temperature vulcanized silicone rubber, etc., and has high utilization value. The production of high-purity white carbon black generally adopts the gas phase method, but the equipment investment of the gas phase method is high, and the production capacity of a single set of equipment is low. The raw material used is silicon tetrachloride or silane, and the production cost is too high and the acidity is strong. Some applications still needs further processing. [0003] In recent years, some enterprises have adopted the precipitation method to produce high-purity white carbon...

AI Technical Summary

Problems solved by technology

The advantage of this method is that high-purity water glass products of different moduli can be prepared according to needs, and high-purity white carbon black can be produced with relatively low cost; the disadvantage is that a large amount of acid waste water will be produced when pickling refined quartz sand, and there are serious problems. Environmental hazards

[0004] In addition, the existing precipitation technology generally uses sulfuric acid as the acidifying agent without further treatment for removing heavy metals. Heavy metals are generally detected in the high-purity white carbon black produced by it and the content controllability is poor. It is widely used in the food and pharmaceutical industries. Poor application reliability

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