Stock code
839391
Our company successfully developed a new converter lining repair method: rapid repair method and composite repair method-Jiaozuo Jinxin Hengtuo converter maintenance series of material performance introduction.
Release time:
2018-07-23
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During the use of the converter lining, the structure of the furnace lining is easily damaged due to the long-term high temperature state of the refractory material on the charging side, the steel side and the bottom of the furnace, and the repeated erosion of the mechanical force impact and slag and molten steel, and the loss caused by the rapid temperature change. At the same time, in order to reduce the cost of steelmaking, the steel mills have greatly increased the use of scrap steel in the converter, increasing the mechanical damage to the refractory material of the front large surface furnace lining, and at the same time, the serious peroxide phenomenon in the furnace has accelerated the erosion of the lining brick, making the life of the converter drop sharply.
Since the current converter damage has increased compared to normal conditions, the converter repair system should be adjusted appropriately. First of all, the number of converter repairs should be increased, but the increase in the number of converter repairs will correspondingly reduce the working time of converter steelmaking, which is bound to reduce steel production, which is also unacceptable to steel mills. In order to solve the contradiction between converter lining repair and steel production, Jiaozuo Jinxin Hengtuo Advanced Material Co., Ltd. has developed a new method of converter lining repair: rapid furnace repair method or composite furnace repair method.
1. Converter maintenance materials
Ø Solid supplementary charge
Ø Converter spray coating
Ø New Type of Environmental Protection Longevity Self-flowing Charge
2. Introduction of performance of resin-bonded solid supplementary charge
The resin-bonded solid charge replaces the traditional asphalt-bonded large fabric, avoiding the phenomenon of "yellow smoke" and environmental pollution during the sintering process. It is based on fused magnesia as the main raw material, phenolic resin as the binding agent, adding the sintering agent, with high thermal strength, strong resistance to mechanical erosion, chemical erosion resistance and other characteristics, the supplementary furnace material has the advantages of simple construction operation, rapid filling furnace, but there is the problem of long sintering time, the life is relatively low. It is suitable for the low rhythm of converter steelmaking.
3. Introduction of converter spray coating performance
It is suitable for trunnion spraying and maintenance. The converter spray coating has strong bonding force and high adhesion rate. High bonding strength, anti-spalling; Rapid hardening, high strength; High temperature resistance, corrosion resistance and other characteristics.
4. Introduction to the performance of the new environmentally friendly longevity self-flowing supplementary charge
Jiaozuo Jinxin Hengtuo Advanced Material Co., Ltd. developed a new type of environment-friendly long-life self-flowing supplementary charge, which is an environment-friendly material. It uses high-purity magnesia, fused magnesia aggregate, fused magnesia fine powder and the like as main raw materials, selects appropriate particle gradation, and adopts environment-friendly liquid binder. The material has low water addition and good fluidity. Adding dense plastic phase material can realize rapid sintering and repair lining structure. With a short sintering time, without any toxic flue gas emissions, good resistance to slag, molten steel penetration and erosion performance, no pollution of the construction environment, the service life is greatly improved; is to extend the service life of the converter furnace, the maintenance of long life of the ideal material, to achieve the purpose of improving the operating rate of equipment.
Physical and Chemical Indexes of 4.1 New Environmental Protection Longevity Self-flow Charge Performance
Performance Characteristics of 4.2 New Type Environmental Protection and Longevity Self-flowing Charge
Ø environmental pollution-free, sintering process does not produce smoke and toxic gases, does not pollute the construction environment
The main raw material is magnesia, which will not bring impurities such as S and C into the furnace.
Good self-flow, self-flow spreading in the furnace, no need to shake the furnace repeatedly, good fluidity can be repaired to the slight unevenness on the surface of the converter lining, fill the potholes on the large surface of the converter, and improve the furnace shape.
The use of rapid sintering technology, the material sintering time is short, generally not more than 30min, saving the furnace time, improve the operation rate of the converter.
Ø Sintering fully, eliminate the hidden danger of splashing caused by sandwich layer
Ø Low porosity, dense repair lining structure, good corrosion resistance, greatly improve the service life
Ø Ceramic bonding, oxidation atmosphere bonding performance is not affected
Performance Comparison of Converter Maintenance Materials for 4.3 Different Combined Systems
On-site use of 4.4 new environmentally friendly long-life self-flowing supplementary charge
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