Mechanochemical preparation method and equipment of magnetic water treatment agent

Abstract

The invention discloses a mechanochemical preparation method and equipment of a magnetic water treatment agent. The preparation method comprises the following steps of: (1) adding magnetic powder and a ball milling medium in a mass ratio of 1: (2-4) to the cylinder of horizontal double-screw stirring mixing equipment, vacuumizing the inner space of the cylinder, driving a horizontally arranged rotating shaft to drive the cylinder into rotation, and performing stirring type ball milling through an internal-rotation stirring stick arranged in the cylinder in opposition to the rotation direction of the cylinder; (2) spraying an atomized modifier into the cylinder through the cavity of the rotating shaft in the ball milling process, wherein the quantity of addition of the modifier is 20-50% of the weight of the magnetic powder; and (3) carrying out stirring type ball milling reaction of the materials under the condition of 50-80 DEG C for 1.5-4 hours, thereby obtaining the magnetic water treatment agent. The mechanochemical preparation method is the mechanochemical method which is simple in preparation process, low in energy consumption and high in efficiency; and the product prepared has a core-shell structure, and is high in surface activity and excellent in magnetic responsiveness.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a mechanochemical preparation method and equipment for a magnetic water treatment agent. Background technique [0002] At present, the coagulants widely used in water pollution control mainly include aluminum-based coagulants (such as aluminum chloride, aluminum sulfate, polyaluminum chloride, polyaluminum sulfate, etc.) and iron-based coagulants (such as ferric chloride, Ferric sulfate, polyferric chloride, polymerized ferric sulfate, etc.), there are shortcomings such as large dosage of chemicals, slow precipitation rate, large amount of mud production and large amount of suspended solids in the precipitated water. In addition, the biofilm carriers used in the sewage biofilm treatment process include quartz sand, activated carbon, slag, polystyrene balls and polyurethane foam. , it is easier to hang the film, but its strength is poor, it is easy to be damaged ...

AI Technical Summary

Problems solved by technology

Since the liquid ferric sulfate product is not convenient for transportation and storage, it is necessary to further dry the liquid ferric sulfate to obtain solid ferric sulfate. The drying process consumes a lot of energy and costs high. At the same time, the use of the iron salt flocculant will cause the water body to turn yellow, which itself has relatively high strong corrosive

[0006] The invention patent with the authorized notification number CN100335420C discloses a "one-step" production method of composite polyferric sulfate, adding magnetic pyrite slag, dilute sulfuric acid and calcium carbonate additives into the reaction kettle, and the Heat, pressurize and stir at 150°C. After the reaction is completed and cooled, the solid polyferric sulfate product is obtained after cooling, solidification, drying, and crushing. Although the "one-step" process overcomes the traditional acid-soluble and drying process in the preparation of coagulants The two-step process, but it has not fundamentally solved the problem of coagulation after the reaction of magnetic powder with acid. In actual operation, it is still necessary to wait for the bulk material to expand and solidify, and then dry and pulverize to obtain the finished product.

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