A method of distributing material to improve the uniformity of work in the circumferential direction of the blast furnace
A technology of uniformity in the circumferential direction, applied in the field of improving the uniformity of blast furnace work in the circumferential direction, can solve the problems of increasing blast furnace fuel consumption, blast furnace refractory material wear, shortening blast furnace life, etc., to reduce the segregation of ore-coke ratio, The effect of stable furnace condition and reducing the difference of ore-coke ratio distribution
Active Publication Date: 2019-03-29
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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Problems solved by technology
In addition, there will often be air flow fluctuations and poor discharge of the tank during the initial stage of pouring, and people will often give up the operation of pouring.
If the circumferential direction of the blast furnace works unevenly for a long time, it will not only increase the fuel consumption of the blast furnace, increase the probability of abnormal furnace conditions, but also cause severe wear of local refractory materials of the blast furnace, damage to the cooling wall, shorten the life of the blast furnace, and cause huge economic losses
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[0020] The following example takes the blast furnace of a steel mill as an object. When the conditions of raw materials and fuels are stable and the blast furnace is basically moving forward, the operations of inverting, reversing and stepping are implemented in the following combination mode and cycle, so as to increase the uniformity of the blast furnace's circumferential work. :
[0021] Step 1: Establish the height distribution H of the material surface in the circumferential direction i and ore-coke ratio distribution O / C i internal connection. Invention patent CN102559965B divides the blast furnace material distribution system into three parts from the material flow valve to the chute, the chute, and below the chute, and constructs the coke and ore mass distribution coefficient ψ in the circumferential direction of the blast furnace according to the movement rules of the materials in each part i (C) and ψ i (O) Model. However, in blast furnace operation, people usual...
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The invention discloses a material distribution method for improving the circumferential-direction working uniformity of a blast furnace. On the basis of not greatly changing the mechanism that smooth motion is basically achieved in the blast furnace and material distribution in the radial direction is achieved, according to the mass distribution characteristic of furnace charge in the circumferential direction, the operation of replacing materials contained in a material tank, switching the rotation direction of a chute and changing the initial rotation angle of the chute is implemented according to a certain period. By means of the method, the normal operation thought of existing operation personnel can be considered, the deviation of the stock rod charge level height is reduced, and distribution of the ore coke ratio in the circumferential direction can also be reduced; and meanwhile, fluctuation of gas flow in the tank reversing implementation process is also reduced, and the material discharge smoothness of the material tank after tank reversing is ensured. Heat exchange and chemical reaction in the circumferential direction of the blast furnace can be uniform, the furnace situation can be stable, and finally the molten iron mass distribution in the circumferential direction is also uniform.
Description
technical field [0001] The invention belongs to the technical field of process control in the metallurgical industry, in particular to a material distribution method for improving the working uniformity in the circumferential direction of a blast furnace. Background technique [0002] Bellless tank-merging blast furnaces are widely used in the world, and the two batch tanks on the top of the furnace are symmetrically arranged on both sides of the central axis of the blast furnace. This layout causes the charge to segregate in the circumferential direction of the blast furnace, which in turn makes the heat exchange and reaction between the airflow and the charge in the circumferential direction of the blast furnace uneven. This segregation is usually manifested in the two symmetrically arranged probes on the furnace top when the furnace condition is relatively stable. There are deviations in the readings, deviations in the readings of the circumferential thermocouples of the ...
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IPC IPC(8): C21B7/20C21B5/00
CPCC21B5/00C21B7/20
Inventor 赵华涛杜屏卢瑜朱华
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE