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Smelting method of schreyerite metalized pellets

A technology of metallized pellets and a smelting method, which is applied to the field of smelting and smelting vanadium-titanium ore metallized pellets, can solve the problems of adverse effects of vanadium extraction work, floating up and down, etc., and achieves improved deep reduction effect, uniform and stable composition, The effect of improving melting and reducing conditions

Active Publication Date: 2014-10-08
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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Problems solved by technology

Large fluctuations in the vanadium content of molten iron lead to corresponding fluctuations in the grade of vanadium slag, which adversely affects the subsequent vanadium extraction work

Method used

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  • Smelting method of schreyerite metalized pellets

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Embodiment Construction

[0012] Hereinafter, the metallized pellet smelting method of vanadium-titanium ore of the present invention will be described in detail in combination with exemplary embodiments.

[0013] In the first exemplary embodiment of the present invention, the smelting method of vanadium-titanium metallized pellets comprises the following steps:

[0014] (1) laying bottom material

[0015] A part of vanadium-titanium ore metallized pellets and a portion of carbonaceous reducing agent are laid on the bottom of the electric melting furnace, wherein, the laying amount of this part of vanadium-titanium ore metallized pellets is the total amount of vanadium-titanium ore metallized pellets in this furnace. 20-50% of the amount, preferably 28-42%. For example, materials can be laid between the electrode and the furnace lining as much as possible to protect the furnace lining. Coke can be used as a carbonaceous reducing agent, and the amount of coke that is deposited matches the metallized p...

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Abstract

The invention provides a smelting method of schreyerite metalized pellets. The method comprises the following steps: laying a first carbonaceous reducing agent and first schreyerite metalized pellets accounting for 20-50% of total schreyerite metalized pellets on the bottom of a melt electric furnaces; starting arc to supply powder, thereby forming a melting bath; adding second schreyerite metalized pellets and a second carbonaceous reducing agent into the melting bath by many times, wherein the second carbonaceous reducing agent is firstly added, and the second schreyerite metalized pellets accounting for 2.5-15% of the total schreyerite metalized pellets are added each time; and after 10-15 minutes after finishing adding all the schreyerite metalized pellets, measuring the temperature, sampling, and discharging slag and tapping when the molten iron temperature is greater than or equal to 1550 DEG C and the FeO content in the furnace slag is 2-5%. The method can improve the melt and reducing condition effects, and can obtain the titanium-containing furnace slag and vanadium-containing molten iron with uniform and stable components and proper reduction degree.

Description

technical field [0001] The invention relates to the technical field of direct reduction of vanadium-containing ilmenite, in particular to a method for smelting and melting metallized vanadium-titanium ore pellets obtained by directly reducing vanadium-containing ilmenite in a rotary hearth furnace. Background technique [0002] my country's Panxi region is rich in vanadium-titanium magnetite resources. At present, the blast furnace-converter process is still the mainstream method for processing vanadium-titanium magnetite. However, with the development and progress of society, this traditional process is also facing increasing energy demands. And the pressure of environmental protection, especially the dependence on coking coal has become a bottleneck restricting its development. More importantly, the blast furnace-converter process can only recover the iron and vanadium in the vanadium-titanium magnetite, and the titanium element enters the blast furnace slag, due to the low...

Claims

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Application Information

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IPC IPC(8): C21B13/12
CPCY02P10/20
Inventor 秦洁刘功国文永才齐建玲谢开良何绍刚
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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