Preparation method of acid-modified caustic-calcined magnesite/pulverized fuel ash water treatment agent

Abstract

The invention relates to a preparation method of a water treatment agent, in particular to a preparation method of an acid-modified caustic-calcined magnesite/pulverized fuel ash water treatment agent. The preparation method comprises the steps of taking the caustic-calcined magnesite and the pulverized fuel ash by weighing according to the mass ratio of 1:1 (g/g), adding industrial hydrochloric acid with the mass fraction of 10%-12% into a vessel containing the caustic-calcined magnesite and the pulverized fuel ash according to the mass-column ratio of 1:1.2-1.4 (g/mL), stirring the mixture at the temperature of 450 DEG C-550 DEG C, acidizing the mixture for 30 min, carrying out a standing reaction for 40 min-60 min, and drying and smashing the mixture to obtain the acid-modified caustic-calcined magnesite/pulverized fuel ash water treatment agent product. According to the preparation method, raw materials are the low-grade caustic-calcined magnesite, the low-grade pulverized fuel ash and the low-concentration industrial hydrochloric acid; the preparation process is simple, neither waste water nor waste residues are produced, the production cost is low, and environmental friendliness is achieved; the acid-modified caustic-calcined magnesite/pulverized fuel ash water treatment agent is a novel water treatment agent integrating the functions of adsorption, coagulation, filtration and the like, can well adapt to the pH values of contaminants such as reactive dyes and heavy metal and can well remove the contaminants.

Description

technical field [0001] The invention relates to a preparation method of a water treatment agent, in particular to a preparation method of an acid-modified light-burned magnesium / fly ash water treatment agent. Background technique [0002] Water treatment agents (coagulants) include inorganic coagulants and organic polymer coagulants. Inorganic coagulants are mostly iron salts, aluminum salts, magnesium salts and inorganic polymer coagulants. Due to the complex manufacturing process, serious environmental pollution, high price of some products, certain toxicity, easy to cause secondary pollution and other reasons for the above-mentioned water treatment agents, as well as the existence of many types of industrial wastewater, great changes in water quality, and difficult to handle, etc., Its production and use are subject to certain restrictions and influences. Therefore, the development of water treatment agents is forced to gradually move towards the direction of "polym...

AI Technical Summary

Problems solved by technology

According to reports, most of the magnesite reserves in Haicheng and Dashiqiao areas are secondary or sub-grade products, and no one wants to mine them. Therefore, mining companies adopt the method of mining the rich and abandoning the poor, and the low-grade magnesite is discarded. , piled directly into the ravine, or piled up on land (the Haicheng Magnesium Mine alone piled up millions of tons of waste rock), resulting in a great waste of resources and white pollution, seriously affecting the local environment

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