Latest ArticlesAfter ignition of No.8 blast furnace in Baotou Steel, add air volume smoothly, keep good pace, achieve a rapid reinforcement, and create the achievement of reaching the target production in 4 days after blow-in. In this paper, operation experience on blow-in and reaching the target production of No.8 blast furnace in Baotou Steel is summarized through increasing equipment reliability, making reasonable blow-in control parameters, optimizing the blow-in scheme, preparing carefully before blow-in and optimization in blast furnace operation.
The safe operation for pressure-bearing parts of waste heat recovery boiler is essential to the safe production of CDQ. Located in the waste heat boiler inlet, superheater is the most prone to leakage since it is the first to be eroded and worn by the high temperature recycle gas. In this paper, combined with the actual production of CDQ in Baotou Steel, analyzed the mechanism, reasons and practical measures of superheater tube burst to facilitate the superheater equipment to run well.
As the main equipment of the blast furnace, the feeding main belt has a direct impact on the normal production of blast furnace. Taking the design of the No.1 blast furnace main belt in Baotou Steel as an example, this paper focuses on the technical requirements of the blast furnace main belt design, as well as the safety precautions and maintenance measures, so that the blast furnace can start, run and stop safely and smoothly.
Aiming at the problems encountered in the actual production of the sintering machine desulphurization system, the key equipment such as pretreatment section, absorption tower and defogging section were overhauled on the basis of thorough analysis and consideration. For nearly a year after transformation, the desulphurization system has been running well, the technical indexes as well as the sulfur dioxide treatment capacity and the desulphurization efficiency have been improved to meet the requirements of environmental protection and the need of ironmaking production.
In this paper, it is introduced the early-stage preparation, scheme formulation and rapid recovery of long term blowing-down for the No.7 blast furnace in Baotou Steel. Through the analysis of the condition before blowing-down, the implementation of heat insulation during blowing-down and the response of influencing factors in the recovery process, by deep study and practice of the large-scale blast furnace blowing-down and recovery, a quick recovery method which is close to the quantification and standardization to achieve the purpose of rapid recovery of furnace condition is proposed.
Since blow-in in 2015, the No.8 blast furnace in Iron-making Plant of Rare Earth Steel Plate Co. in Baotou Steel has been running in good condition. However, the airflow distribution changes in March 2016, piping problems increased significantly and affected the furnace condition, the economic and technical indexes become worse. In this paper, the causes of the abnormal airflow distribution are analyzed and the measures taken during the abnormal period are summarized.
In this paper, it is studied the relationship of rolling oil lubrication system for rolling force, friction coefficient and the main motor current in the process of hot strip rolling, especially the rolling force of the finishing mill is large when the thin strip and the special steel are rolled, the wear of the rolls and vibration of the stand are serious. The use of rolling oil lubrication is an essential factor for the stable rolling of thin strip and special steel in the finishing mill. After rolling oil lubrication system is put into use, the roll loss, the number of roll changing, and energy consumption are reduced.
In this paper, the control mode and regulation mode of gas cooling system are analyzed in detail, the improvement scheme is put forward and implemented in view of the large energy consumption of the unit caused by the temperature influence of the combustion medium in the operation of M701S gas-steam combined cycle power plant in Baotou Steel. The improved system realized the optimization of the combustion medium during the operation of the unit and finally made the unit running in the most stable and economical conditions.
Based on the research of the coking dust reblending in coking plant, the feasibility of the test is verified, and the reasonable and effective use of this resource is made to save the cost and reduce the environmental pollution. Mean-while, according to the results, through discussion and screening, the feasibility scheme is successfully applied in industrial production, and has achieved considerable economic and social benefits.
Low temperature semi coke is a solid carbonaceous fuel of high volatile bituminous coal by pyrolysis obtained, with high fixed carbon, low ash, low sulfur, low volatile. The experimental research of blast furnace injection of low temperature semi coke shows that the explosion and grindability can meet the production requirements, and the combustion rate is better than that of the present mixed pulverized coal. If the low temperature semi coke can be used in the field of blast furnace smelting, it can relieve the pressure of anthracite resource and widen the range of injection coal source selection.
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