Converter steelmaking slagging agent prepared from aluminum ash dolomite and preparation method

Abstract

The invention provides a converter steelmaking slagging agent prepared from aluminum ash dolomite and a preparation method. The converter steelmaking slagging agent comprises aluminum ash and dolomite powder. According to the converter steelmaking slagging agent, the aluminum ash and the light-burned dolomite powder in a proper proportion are mixed and homogenized in the uniform mixing container for blocking air circulation to form the dry mixture, and the dry mixture is subjected to dry pressing to form the ellipsoidal converter steelmaking slagging agent, so that the loss of various effective components with high reaction activity, such as metal aluminum, in the aluminum ash is avoided. The composite slagging material (agent) which is produced by taking the aluminum ash and the light-burned dolomite powder as raw materials and contains magnesium oxide and aluminum oxide components not only can improve the steelmaking slagging operation of a converter, but also can overcome the defects of high resource consumption and high cost caused by taking aluminum vanadium soil blocks and light-burned dolomite blocks as slagging raw materials; the effect of directly recycling the light-burned dolomite fine powder is achieved, the aluminum ash can be efficiently utilized in a full-value mode, and the method has economic, environment-friendly and social positive significance in the aspects of reduction of aluminum ash stockpiling land occupation, reduction of other environment-friendly negative effects and comprehensive utilization of resources.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of waste resources, in particular to a converter tempering slag agent prepared from aluminum ash dolomite and a preparation method. Background technique [0002] At present, the slag materials (agents) used in converter steelmaking usually use light-fired dolomite or light-fired bauxite as raw materials, which have the disadvantages of large resource consumption and high firing costs. Secondary aluminium ash of metallic aluminium) containing up to 70% Al 2 O 3 And it has a lower melting point than light-burning bauxite (because its composition contains low-melting substances such as sodium hexafluoroaluminate), but secondary aluminum ash is mostly fine powder material and cannot be used directly for converter steelmaking. In the process of burning dolomite, a large amount of light-burning dolomite fine powder with a particle size of less than 5mm is produced, and the converter ...

AI Technical Summary

Problems solved by technology

[0002] At present, light-burned dolomite or light-burned bauxite is usually used as a raw material for the slag-removing material (agent) used in converter steelmaking, which has the disadvantages of large resource consumption and high firing cost. Secondary aluminum ash of metallic aluminum) containing up to 70% Al 2 o 3 And it has a lower melting point than light-burned bauxite (because it contains low-melting-point substances such as sodium hexafluoroaluminate). However, secondary aluminum ash is mostly a fine powder material that cannot be directly used for converter steelmaking. In addition, in light A large amount of light-burned dolomite fine powder with particle size less than 5mm is produced in the production process of burnt dolomite, and the converter cannot be used. Therefore, if a kind of aluminum ash and light-burned dolomite powder can be invented as raw materials, it contains both magnesium oxide and The composite slagging material (agent) composed of alumina can not only improve the slag-making operation of converter steelmaking, but also overcome the large resource consumption and high cost of using bauxite blocks and light-burned dolomite blocks as slag-making raw materials. At the same time, it can utilize the full value of the useful components of aluminum ash and directly recycle light-burned dolomite fine powder, which can reduce the land occupation of waste resources and reduce other negative effects on environmental protection. It is economical, environmentally friendly and environmentally friendly for the comprehensive utilization of resources. Positive significance in social and other aspects