Complex organic grinding aid for converter heat-stewed steel slag, and preparation and usage methods of grinding aid

Abstract

The invention discloses a complex organic grinding aid for converter heat-stewed steel slag, and preparation and usage methods of the grinding aid. The grinding aid is prepared from the following raw materials in parts by mass: 20-40 parts of crude glycerine, 5-10 parts of dipropylene glycol, 2-10 parts of tripropylene glycol, 3-8 parts of triethanolamine borate, 5-10 parts of N-methyl diethanol amine and 30-70 parts of water; the preparation method comprises the following steps: according to the proportions, firstly dissolving triethanolamine borate into water, then sequentially mixing the dipropylene glycol, tripropylene glycol and N-methyl diethanol amine, then adding crude glycerine, and evenly stirring, to obtain the grinding aid; in use, the mixing quantity is 0.03%-0.06% of the mass of the converter heat-stewed steel slag. The complex organic grinding aid has strong adaptability to the converter heat-stewed steel slag, the grinding effect is obvious, the preparation method is simple, the performances are stable, the usage mixing quantity is low, the comprehensive effect is excellent, the cost of the grinding aid is low as a great amount of industrial byproduct crude glycerine is used, so that the grinding aid has wide application prospects.

Description

technical field [0001] The invention relates to the field of grinding aids, in particular to a composite organic grinding aid for converter hot-simmered steel slag and its preparation and use methods. Background technique [0002] Steel slag is a kind of industrial waste slag produced in the steelmaking process. At present, the steel slag discharged in my country is mainly converter steel slag. Since the chemical and mineral composition of converter steel slag is similar to Portland cement clinker, its potential as auxiliary cementitious material is huge. However, the volume instability, poor grindability and low activity of steel slag limit its popularization and application in cement concrete industry. [0003] With the improvement of steel slag treatment technology (especially the thermal braising treatment process widely used in recent years), the factors that cause the volume instability of steel slag (free calcium oxide and free magnesium oxide) have been controlled a...

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Problems solved by technology

However, at present, the grinding aids are mainly cement grinding aids, and there is no report on the special grinding aids for the converter hot-steel slag. Grinding aid effects are very different, and cement grinding aids are not suitable for hot-steamed steel slag in converters, so it is necessary to develop special grinding aids for hot-steeled steel slag in converters

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