Alkaline residue cement superfine powder and preparation method thereof

Abstract

The invention discloses alkaline residue cement superfine powder. The alkaline residue cement superfine powder is prepared by the following steps: uniformly mixing 98 to 99 percent by mass of waste alkaline residue discharged after production of industrial crystal soda in salt chemical industry and 1 to 2 percent by mass of chlorine remover with stirring; curing and drying at 100 DEG C; grinding the mixture into cement superfine powder with a specific surface area of greater than 400 to 500m<2> / kg. The alkaline residue cement superfine powder can replace 40 to 50 percent of cement products, improves the performance of cement products, can advance the setting time of cement by 20 to 40 minutes, increases the hydration strength of cement by 8 to 12mpa, increases the specific surface area by100 to 150m<2> / kg, reduces the water consumption of cement by 15 to 30 percent, increases the wear resistance of cement by 10 to 15 times, increase the compatibility of cement products by 100mm, increases the hourly output of a cement table by 20 to 30 tons, directly lowers the cost of cement by 80 yuan / ton, and protects the environment from secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of environmentally friendly cement production, and in particular relates to a superfine cement powder prepared from industrial waste slag and alkali slag. Background technique [0002] With the continuous development of my country's economic reform and opening up, especially the new technology of the salt chemical industry is advancing by leaps and bounds, resulting in the consumption of a large amount of natural mineral resources such as limestone, and also causing the problem of environmental pollution. Waste slag is difficult to handle and can only be piled up and landfilled, resulting in secondary pollution of groundwater resources. Alkali slag contains a large amount of calcium oxide, calcium chloride and other components, and the water content is about 50%. In order to turn waste into treasure, we turn industrial waste Alkali slag, a kind of ultra-fine powder produced by a specific process, is used to re...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: The purpose of the invention is to solve the problems of stacking and landfilling a large number of salt chemical waste residues and alkali residues, seriously polluting groundwater resources, etc., and provide a cement super-combined powder with low production cost and good product performance and its preparation method