Preparation method of environment-friendly zirconium toughening dry material

Abstract

The invention discloses a preparation method of an environment-friendly zirconium toughening dry material, which comprises the following steps in order: crushing quartz sand into small particles of 0.3mm-3mm, sieving the small particles into two specifications with particle sizes of 3 mm and 0.3mm-3mm respectively; performing fine grinding of part of the small particles into fine power of 0.088 mm; weighing 5% of anhydrous glucose and 0.7% of borax; stirring for 18-22 min for premixing, after premixing, conveying the premixed-material into a mixing system; filling 14% of quartz sand with a particle size of 3 mm, 64.3% of quartz sand with a particle size of 0.3-3 mm, and 16% of quartz sand with a particle size of 0.088 mm into a material mixing system tank, mixing for 4-6 min, conveying the mixture into the mixing system; performing split charging of quartz sand, anhydrous glucose and borax simultaneously to obtain the dry material finished product. When the environment-friendly zirconium dry material prepared in the invention is used for smelting ordinary steel, the using amount of mineral product resources is greatly reduced; thus the steel-making cost is greatly reduced in terms of raw materials; the smelting requirements for ordinary steel are completely met; and the product quality is not reduced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for preparing an environment-friendly zirconium toughened dry material. Background technique [0002] At present, dry material is widely used in metallurgical industrial furnaces, thermal equipment and structures, and is the preferred material for working lining of tundish for converter steelmaking. Its use increases the amount of molten steel contained in the tundish and reduces the amount of slag sticking to steel slag. , Improve the safety factor, reduce the thermal conductivity, thereby greatly improving the efficiency of steelmaking, saving energy consumption, and comprehensively improving the quality of steel. However, in use, the resin-bonded tundish dry material has also exposed many problems: it causes the molten steel to increase carbon; the corrosion resistance is poor; the solid phenolic resin binder emits a large amount of harmful gases during baking and heating, p...

AI Technical Summary

Problems solved by technology

However, in use, the resin-bonded tundish dry material has also exposed many problems: it causes the molten steel to increase carbon; the corrosion resistance is poor; the solid phenolic resin binder emits a large amount of harmful gases during baking and heating, polluting the environment, which is not conducive to Clean steelmaking and environmental protection requirements, while bringing health hazards to operators and construction personnel