Method for improving quality of sintered ore

A technology for sintering and quality, applied in the field of sintering, can solve the problems of unfavorable sintering and blast furnace production, low utilization coefficient of sintering machine, poor sieving index, etc., so as to improve sintering production efficiency, facilitate strengthening and coke ratio, and improve grade Effect

Inactive Publication Date: 2015-12-02
XINXING DUCTILE IRON PIPES CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This area is the area where the sintering machine has a low utilization factor, low yield, sinter drum strength, and poor screening index, which is not conducive to sintering and blast furnace production

Method used

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  • Method for improving quality of sintered ore
  • Method for improving quality of sintered ore
  • Method for improving quality of sintered ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In the embodiment of the present invention, based on the production at that time, the slag basicity and charge structure of the sinter after adjustment are measured and calculated respectively.

[0016] Data analysis and use effect:

[0017] 1. Low magnesium sintering, data monitoring

[0018] Taking the 3# blast furnace as an example, carry out industrial experiments and gradually spread to other blast furnaces. Use the sintering cup laboratory to track, record, and analyze the changes in sinter performance indicators (low-temperature reduction pulverization rate, reducibility, and droplet performance). The comparison of sinter composition and performance indicators is shown in Table 1. Figure 1-Figure 3 shown. Table 1 is the change table of conventional analysis indicators of sinter. The content of MgO in sinter decreased from 2.3-2.43% to 1.75-2.05%, with an average of about 1.9%. The production capacity of sinter increased, the grade increased slightly, the stre...

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Abstract

The invention discloses a method for improving quality of sintered ore. According to the method, the content of MgO in the sintered ore is reduced, and the content of MgO is enabled to account for 1.75%-2.05% of the total mass of the sintered ore; preferably, the content of MgO in the sintered ore accounts for 1.75%-1.81% of the total mass of the sintered ore. The content of MgO of the sintered ore is properly reduced, sintering and blast furnace production are better, and indexes get better; the sintering production efficiency and the cold strength of the sintered ore are improved, the low-temperature reduction degradation index of the sintered ore is increased, the temperature interval of a soft melting zone of the sintered ore is reduced, and the grade of the sintered ore is improved. Therefore, the permeability of a massive zone and the soft melting zone of a blast furnace is improved, the quantity of slag in the blast furnace is reduced, the smooth operation condition of the blast furnace is improved, and blast furnace smelting strengthening and coke ratio reduction are facilitated.

Description

technical field [0001] The invention relates to the field of sintered ore, in particular to a method for improving the quality of sintered ore. Background technique [0002] Sintering is to mix various powdery iron-containing raw materials with an appropriate amount of fuel and flux, and add an appropriate amount of water. After mixing and pelletizing, a series of physical and chemical changes will occur on the material on the sintering equipment, and the ore powder particles will be bonded. block of products. [0003] According to domestic and recent research results, the influence of MgO content on sinter drum strength, utilization coefficient, yield, vertical sintering speed, etc. is generally in the shape of a parabola with an upward opening, and the corresponding MgO content at the bottom is about 2.6%. This area is the area where the sintering machine has low utilization factor, low yield, sinter drum strength, and screening index are poor, which is unfavorable to sin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 蔺艳辉李向东李新会
Owner XINXING DUCTILE IRON PIPES CO LTD
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