Silicon carbide preparation process with efficient impurity removal function

Abstract

The invention discloses a silicon carbide preparation process with efficient impurity removal function. The preparation process specifically comprises the following steps: S1, firstly, mixing quartz sand with coke; S2, taking the silicon carbide raw material prepared in the step S1, and crushing the silicon carbide raw material into silicon carbide particles by a crusher; S3, performing acid-basecleaning and impurity removal on the silicon carbide particles shaped in the step S2 through acid-base integrated cleaning and impurity removal equipment; and S4, obtaining the carbonized powder aftercleaning and impurity removal in the step S3 is completed. The invention relates to the technical field of chemical production. According to the silicon carbide preparation process with the efficientimpurity removal function, acid liquor or alkali liquor can be atomized and mixed with silicon carbide powder sprayed out at the same time in a correlation type atomization mode, so that each siliconcarbide powder can make full contact with cleaning liquid to be cleaned, and the effects that high-pressure spraying and mixing are adopted, and the cleaning effect is good are well achieved. The silicon carbide powder impurity removal device is good in impurity removal effect, high in dryness removal efficiency and low in cost.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a silicon carbide preparation process with an efficient impurity removal function. Background technique [0002] Silicon carbide is a refractory material made of quartz sand, petroleum coke or wood chips as raw materials through high-temperature resistance furnace smelting. Silicon carbide also exists in rare minerals in nature. Among moissanite, silicon carbide has stable chemical properties, High thermal conductivity, small thermal expansion coefficient, good wear resistance, besides being used as an abrasive, there are many other uses, such as: coating silicon carbide powder on the inner wall of a water turbine impeller or cylinder block by a special process, which can improve its wear resistance It can prolong the service life by 1 to 2 times; it is made of high-grade refractory material, which is resistant to heat shock, small in size, light in weight and high in...

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Problems solved by technology

[0010] Aiming at the deficiencies in the prior art, the present invention provides a silicon carbide preparation process with high-efficiency impurity removal function, which solves the problem that the existing impurity removal method has a poor effect of impurity removal, and pulp cleaning will cause nodules between silicon carbide powders Agglomeration affects the contact between a single silicon carbide powder particle and the cleaning solution. The desiccation efficiency is low and the cost is high. It cannot be achieved by atomizing the acid or lye and spraying the silicon carbide powder at the same time. , so that each silicon carbide powder can be fully contacted with the cleaning solution for cleaning, it cannot achieve the purpose of cleaning the silicon carbide powder more thoroughly by using high-pressure jet mixing, and at the same time it cannot achieve the integration of pickling and alkali cleaning Cleaning equipment for circular cleaning and impurity removal

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