New technology for preparing converter slag-regulating reagent by light-burning dolomite powder ash

Abstract

The invention provides a new technology for preparing converter slag-regulating reagent by light-burning dolomite powder ash, which comprises the following steps of: carrying out particle size sieving on calcined dolomite; directly sending light-burning dolomite blocks of which the diameter is more than 5mm into a steel mill to be used; sieving the light-burning dolomite blocks of which the diameter is less than 5mm to a certain degree; crushing the light-burning dolomite blocks of which the diameter is more than 3mm to ensure that the particle size of the light-burning dolomite is less than 3mm; blending and adding certain binding agent and water into the light-burning dolomite powder ash of which the particle size is less than 3mm; pelletizing in a disc balling machine to obtain a light-burning dolomite pellet of which the particle size is more than 15mm; and after the pellet is conserved to meet a converter slag-regulating reagent requirement, sending the pellet to the steel mill to replace the light-burning dolomite block for use. According to the new technology disclosed by the invention, the light-burning dolomite powder ash is pelletized by adding a certain quantity of bonding agent and a proper quantity of water, and the technology is simple. In addition, due to the fact that the iron and steel enterprise has an abundant pellet production experience, the new technology is favorable for the high-value utilization of the light-burning dolomite powder ash, and has important meanings on energy saving, emission reduction and resource utilization of the iron and steel industry.

Description

technical field

[0001] The invention belongs to the field of resource environmental protection, and in particular relates to a method for a converter slagging agent prepared by using lightly burned dolomite powder ash. Background technique

[0002] The slag splashing furnace protection technology plays a very important role in the protection of the converter and the improvement of the life of the converter. In the slag splashing furnace protection technology, it is the slag adjusting agent that plays a key factor. At present, the slag adjusting agents commonly used in steel mills mainly include: lightly burned dolomite, lightly burned magnesia balls, and metallurgical magnesia. Choosing a suitable slag adjusting agent is the key to ensure the effect of slag splashing to protect the furnace and improve the comprehensive economic benefits of slag splashing. Lightly burned dolomite is the most suitable slag adjusting agent for slag splashing and furnace protection. Moreover, ...