Red mud-yellow phosphorus residue-cement concrete preparation method

Abstract

The invention discloses a red mud-yellow phosphorus residue-cement concrete preparation method, which comprises: preparing a novel compound environmentally-friendly cement by replacing part of Portland cement with yellow phosphorus residue and red mud according to a certain ratio (a mixing ratio of yellow phosphorus residue to red mud to ordinary Portland cement is 25:10:65); stirring and uniformly mixing the compound cement, fine sand, broken stone, an efficient water reducing agent and mixing water; and pouring the obtained mixture into a test mold, carrying out vibrating molding, and curingfor a certain time under suitable conditions to obtain the qualified concrete with characteristics of stable mechanical property, low price and environmental protection. According to the present invention, by replacing the part of the high-energy consumption cement with red mud and yellow phosphorus residue harmful to the environment, the pressure on the environment due to the large-scale stacking of red mud and yellow phosphorus residue can be effectively reduced while the consumption of the high-energy consumption cement can be reduced, such that the method has advantages of environmental protection, broad prospect and the like, and is suitable for large-scale applications.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization, in particular to a method for preparing concrete by using an electric furnace method to prepare yellow phosphorus slag produced by yellow phosphorus and red mud produced by the alumina industry to replace part of ordinary portland cement. Background technique [0002] Yellow phosphorus slag is an industrial by-product produced by the industrial electric furnace method to prepare yellow phosphorus. During the preparation of yellow phosphorus, coke and silica are used as reducing agents and slag-forming agents to make calcium and silicon dioxide in the phosphate rock form molten slag. Phosphorus slag is formed by water quenching and cooling after discharge, and its main chemical components are CaO and SiO 2 . Every 1 ton of yellow phosphorus produces 8-10 tons of yellow phosphorus slag. With the continuous production of yellow phosphorus industry, a large amount of yellow ...

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Problems solved by technology

These stockpiling methods not only occupy a large amount of land, but also make many available components in red mud unable to be used rationally, resulting in secondary waste of resources

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