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Method for increasing finished product rate of sintered ore

A technology of yield rate and sintering ore, applied in the field of iron and steel metallurgy, can solve the problem of low yield rate of sintering ore

Active Publication Date: 2019-12-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for improving the yield of sintered ore in order to overcome the problem of low yield of sintered ore in the prior art

Method used

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  • Method for increasing finished product rate of sintered ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Weigh each component according to the content shown in Table 2, mix the weighed sintered material and return ore plus clear water in the mixer for the first time, the mixing time is 3min, and the content of clear water is 90% of the total water weight%.

[0046] (2) The mixed material obtained in step (1) and the mixed material strengthening liquid are mixed for the second time in a mixer, and the mixing time is 3 minutes, and the water content of the mixed material is controlled at 7.0% by weight. Among them, the mixture strengthening liquid is prepared according to the scheme A1 in Table 3.

[0047] (3) distributing, igniting, and sintering the mixture obtained in step (2) on a sintering machine. Among them, the thickness of the material layer after cloth is controlled at 650mm, the ignition temperature is 1050°C, the machine speed is 2.0m / min, and the sintering negative pressure is 15kPa.

Embodiment 2

[0049] (1) Weigh each component according to the content shown in Table 2, mix the weighed sintered material and return ore plus clear water in the mixer for the first time, the mixing time is 3min, and the content of clear water is 90% of the total water weight%.

[0050] (2) The mixed material obtained in step (1) and the mixed material strengthening liquid are mixed for the second time in a mixer, and the mixing time is 3 minutes, and the water content of the mixed material is controlled at 7.0% by weight. Among them, the mixture strengthening liquid is prepared according to the scheme A2 in Table 3.

[0051] (3) distributing, igniting, and sintering the mixture obtained in step (2) on a sintering machine. Among them, the process parameters such as material layer thickness, ignition temperature, machine speed and sintering negative pressure are the same as those in Example 1.

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Abstract

The invention relates to the field of iron and steel metallurgy, and discloses a method for increasing the finished product rate of sintered ore. The method for increasing the finished product rate ofthe sintered ore includes the steps that firstly, clear water is added in a sintered material and selectable return fines, first-time mixing is conducted, the amount of the return fines which are used is smaller than or equal to 30% of the weight of the sintered material, and the returned fines are vanadium-titanium sintered ore with the grain size being 5 mm or lower; secondly, second-time mixing is conducted on the mixed material obtained in the first step and mixed material reinforcement liquid; and thirdly, the mixed material obtained in the second step is subjected to material distribution, ignition and sintering, wherein the mixed material reinforcement liquid is prepared from corn starch and warm water according to the proportion being (0.05-1) : 99, and the temperature of the warmwater is 40 DEG C to 80 DEG C. By means of the method, the size composition of the mixed material can be improved, and therefore the finished product rate of the sintered ore is increased.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a method for increasing the yield of sintered ore. Background technique [0002] After decades of exploration and research, sintering agglomeration technology has been perfected day by day, increasing the yield of sintered ore can not only reduce the emission of pollutants, but also reduce the cost of sintering. Therefore, the yield is an important index in the sintering process. To increase the yield of sintered ore is to reduce the amount of returned ore and the amount of returned ore circulation, that is, to increase the proportion of sintered ore with a particle size greater than 5mm. Generally, the higher the proportion of particle size greater than 3mm in the mixture, the better the sinter granulation effect; the larger the proportion of particle size in the range of 3-8mm, it can not only ensure the air permeability of the sintering process, but also ensure the th...

Claims

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Application Information

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IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 王禹键饶家庭胡鹏郑魁蒋胜
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP