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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

Inactive Publication Date: 2019-05-28
王娟
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used traditional method of producing calcium silicate at home and abroad is the precipitation method, which needs to consume a large amount of soda ash and sulfuric acid, and the cost is relatively high

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[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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PUM

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Abstract

The invention relates to white carbon black prepared from industrial waste slag and a production technology thereof. The production technology is characterized by comprising the following steps of adding quartz sand, calcium sulfate and charcoal into a kiln furnace, reacting, and treating generated solid and sulfur dioxide by the following steps so as to generate calcium silicate, calcium sulfiteand calcium bisulfite: (1) generation of calcium silicate: dissolving the generated solid, precipitating and filtering, adding sulfuric acid, washing, pulping and drying, so as to obtain the calcium silicate; (2) generation of calcium sulfite: adding sodium carbonate into a calcium bisulfite solution, generating a calcium sulfite solution, and concentrating and drying one part to obtain the calcium sulfite; enabling the other part and the generated sulfur dioxide to react, generating a calcium bisulfite solution, and recycling to obtain the calcium sulfite; (3) generation of calcium bisulfite:adding sodium carbonate into the calcium bisulfite solution, generating the calcium sulfite solution, reacting with the generated sulfur dioxide, crystallizing, and drying, so as to obtain the calcium bisulfite. The production technology provided by the invention has the advantages that the process is simple, multiple types of products are jointly produced, the production cost is low, and the application and popularization value is higher.

Description

technical field [0001] The invention relates to a preparation of light silicon dioxide by utilizing industrial waste residue and a production process thereof. Background technique [0002] Lightweight silica is a good reinforcing agent for rubber; it is also used as a filler or white pigment for lubricants, insulating materials, plastic products, paper, paint, textiles, etc. At present, the most commonly used traditional method of producing calcium silicate at home and abroad is the precipitation method, which needs to consume a large amount of soda ash and sulfuric acid, and the cost is relatively high. Contents of the invention [0003] The object of the present invention is to provide a kind of utilizing industrial waste slag to prepare light silicon dioxide and its production technology, and this technology reduces the cost of producing calcium silicate. [0004] The present invention uses industrial waste slag to prepare light silicon dioxide and its production proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/24C01B33/32C01F11/48
Inventor 王娟
Owner 王娟
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