Preparation method of acid-modified light-burned magnesium/fly ash water treatment agent

Abstract

A method for preparing an acid-modified light-burned magnesium / fly ash water treatment agent, which relates to a method for preparing a water treatment agent, in which light-burned magnesium and fly ash are weighed in a mass ratio of 1:1 (g / g) , and add industrial hydrochloric acid with a mass fraction of 10%-12% to the container containing light burnt magnesium and fly ash at a mass volume ratio of 1:1.2-1.4 (g / mL), stir and mix at 450C-550C Acidification for 30 minutes, static reaction for 40 minutes to 60 minutes, drying and pulverization is the prepared acid-modified light-burned magnesium / fly ash water treatment agent product. The production raw materials of the present invention are low-grade light-burned magnesium powder, fly ash and low-concentration industrial hydrochloric acid; the preparation process is simple, no waste water and waste residue are produced, the production cost is low, and the environment is friendly; It is a new type of water treatment agent that has a good pH adaptation range and removal effect on reactive dyes, heavy metals and other pollutants.

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 "polymeriz...

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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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