A Model Experimental Method for Blast Furnace Coke Ratio and Airflow Distribution Adjustment
An experimental method, the technology of ore-coke ratio, applied in the direction of blast furnace, blast furnace details, furnace type, etc., can solve the problems of pushing to the center of the blast furnace, not accurately reflecting the distribution of ore-coke ratio, changes in the distribution of ore-coke ratio, etc.
Active Publication Date: 2016-08-17
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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Problems solved by technology
However, under certain air supply conditions and the shape of the material surface, during the process of distributing the ore, because the coke density is smaller than the ore, part of the coke will be pushed to the center of the blast furnace by the ore, thus changing the distribution of the ore-coke ratio.
The above two calculation methods cannot accurately reflect the distribution of ore-coke ratio in the furnace during the actual production process
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[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0025] Using the blast furnace distribution model that is 15 times smaller than the actual blast furnace, the radial material surface shape distribution, the mineral coke ratio distribution and the wind speed distribution after the distribution are studied under typical distribution matrix settings and air supply conditions.
[0026] First, prepare the experimental charge:
[0027] The particle size composition of coke and sinter used in actual blast furnace production is shown in Table 1 and Table 2, where the batch weights of coke and ore are 32t and 170t respectively. Measure the bulk density of coke and ore in advance, according to 1 / 15 3 The volume ratio can be scaled to obtain the batch weights of coke and ore required for the experiment, which are 9.48kg and 50.36kg, respectively. Such as Figure 4 As shown, on the particle size dist...
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The invention relates to a model experiment method for regulating the distribution of the ore coke ratio and air flow of a blast furnace, belonging to the technical field of metallurgical experimental study. According to the technical scheme, the model experiment method comprises the following steps: preparing a material distribution model by scaling down actual blast furnace top material distribution equipment and an inner model of a furnace body in a proportion of 1 to 15; weighing raw materials of each size fraction required by the experiment according to size distribution similarity, and uniformly mixing; setting material distribution and air supply parameters according to movement similarity; after the material distribution is finished, measuring radial air speed distribution of a furnace throat by virtue of an anemograph, and measuring radial thickness distribution of ores and cokes in the furnace throat by virtue of a thickness gauge. The model experiment method has the positive effects that the operation is simple, the measurement is accurate, the experimental raw materials are saved, the distribution of charge level shapes, the ore coke ratio and the air flow speed under a specific material distribution matrix and a specific air supply device in an actual blast furnace production process can be accurately reflected, and the material distribution and air supply adjustment of a blast furnace operator are guided so as to avoid collapse and local fluidization of coke.
Description
technical field [0001] The invention relates to a model experiment method for adjusting blast furnace ore-coke ratio and gas flow distribution, and belongs to the field of experimental research in the metallurgical industry. Background technique [0002] In the massive zone of the blast furnace, the distribution of the ore-coke ratio in the radial direction of the throat determines the distribution of the radial airflow in the throat, and the radial airflow distribution in the throat will affect the shape of the material surface, and then affect the radial ore-coke ratio in the throat distributed. During the actual operation of the blast furnace, it is impossible to enter the furnace to measure the distribution of coke and ore layer thickness. At present, there are two ways to calculate the distribution of ore-coke ratio: first, measure the shape of the material surface after coke and ore are laid out by laser or radar, so as to calculate the distribution of ore-coke ratio;...
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IPC IPC(8): C21B5/00
Inventor 赵华涛刘建波杜屏
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE