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.