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Method for improving performance of slag

A slag and performance technology, applied in the field of improving slag performance, can solve the problems of affecting slag fluidity, increasing blast furnace fuel, increasing coke consumption, etc., to achieve the effects of improving slag iron fluidity, reducing iron loss, and improving slag performance

Active Publication Date: 2015-06-10
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
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Problems solved by technology

In particular, fluorite is added from the top of the furnace. Since fluorite is a raw material, adding it from the top of the furnace will increase the fuel ratio of the blast furnace, that is, increase the coke consumption.
Even enterprises with mature smelting technology still have viscous slag from time to time in the process of smelting vanadium-titanium magnetite, which seriously affects the fluidity of slag and increases iron loss.

Method used

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  • Method for improving performance of slag

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Embodiment

[0022] This embodiment discloses a method for improving the performance of the slag, which not only solves the problem of feeding raw material into the furnace, but also effectively prevents the thickening of the slag, improves the performance of the slag, reduces abnormal furnace conditions, and reduces iron loss.

[0023] Specifically, the method includes the following steps: Step 1, adding fluorspar powder to the sintering ingredients for adding the sintered ore to the blast furnace; it is beneficial to the stability of the furnace condition. Preferably, in the present embodiment, the fluorite powder is selected from CaF 2 Fluorite powder with a mass content of 84.5%. Furthermore, the added fluorite powder is sintered clinker, which is beneficial to reduce the combustion ratio of the blast furnace.

[0024] Step 2, adjusting the proportion of the fluorite powder in real time according to the change of the viscosity of the slag.

[0025] The sintering ingredients and sinte...

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Abstract

The invention discloses a method for improving the performance of slag. The method comprises the following steps that firstly, after fluorite is added in sintering materials to be sintered together, the product and sinter are added in a blast furnace; secondly, the matching of the fluorite is adjusted in real time according to the viscosity change of the slag. The problem of raw material furnace feeding is solved, slag thickening can be effectively prevented, the performance of the slag is improved, the function of improving the fluidity of slag is achieved, the iron loss is reduced to 2.44-2.81 %, and therefore the purpose of effectively separating slag and iron is achieved, the abnormality of the furnace condition is reduced, and the iron loss is reduced.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting, in particular to a method for improving the performance of slag. Background technique [0002] In ironmaking production, especially in the smelting process of vanadium-titanium magnetite, the performance of slag directly affects whether the smelting of blast furnace is smooth or not. [0003] The difficulty in smelting vanadium-titanium magnetite is that the thickening of the slag often leads to an increase in the viscosity of the slag, and the phenomenon of slag-iron separation occurs, which seriously affects the smelting of the blast furnace, causes abnormality of the blast furnace, and affects the normal smelting of the blast furnace. In the past, in order to improve the performance of the slag in the furnace, fluorite and manganese-containing ores were added from the top of the furnace or oxidizing substances (iron-containing materials, etc.) were injected from the tuyere, whic...

Claims

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Application Information

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IPC IPC(8): C21B5/04
Inventor 蒋胜唐文博胡鹏王禹键张义贤张海军
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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