Method for producing building material with low-temperature ceramic modified industry by-product gypsum

Abstract

The invention relates to a method for making a building material by low-temperature ceramic modified industrial side product gypsum, belonging to the building material technical field. The compositions adopted by the method are mixed according to the following mass ratio that: gelating material: side product gypsum: filler: activator: auxiliary agent: water reducing agent: polymer emulsion: solvent is equal to 100:300-900:50-500:80-150:12-30:1.0-10:0-50:50-500. The raw materials respectively undergoes raw material treatments such as gelating material powder preparation, waste gypsum treatment, filler crushing screening and polymer emulsion-solvent mixing and so on, and then are made into a building material which takes low-temperature ceramic mineral generated by the hydration of an inorganic waste residue gelating material as matrix phase and waste residue particle, waste gypsum and a hydration product thereof as disperse phase through the mixing, forming and maintenance working operation of a semi-finished product raw material. The building material has excellent mechanical property, high comprehensive utilization rate of wastes, more derivative products and stable performance.

Description

1. Technical field:

[0001] The invention relates to a method for producing building materials by modifying industrial by-product gypsum with low-temperature ceramics, and belongs to the technical field of building material preparation. 2. Background technology:

[0002] The so-called industrial by-product gypsum is a by-product mainly composed of calcium sulfate dihydrate discharged from the production process of chemical industry, metallurgy, energy, food and other industries, such as flue gas desulfurization gypsum, phosphogypsum, titanium gypsum, fluorogypsum by-product of coal-fired power plants , citric acid gypsum, wet manganese slag and lead-zinc slag, etc. On the one hand, the industrial by-product gypsum has a large output and occupies land. What’s more, it also contains substances harmful to human body and environment, such as free acid and heavy metal ions. Its safe treatment and resource utilization have become a major issue that needs to be solved urgently by re...

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