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Method of smelting titanium slag through two-step method

A technology of titanium slag and step method, which is applied in the field of metallurgy, can solve the problems that are difficult to realize, and achieve the effects of reducing production costs, simple process operation, and low viscosity of titanium slag

Active Publication Date: 2020-09-25
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is difficult to ensure the quality of titanium slag products and reduce the influence of viscosity on furnace conditions during the smelting process.

Method used

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  • Method of smelting titanium slag through two-step method

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Embodiment 1

[0031] Embodiment 1 adopts the method of the present invention to smelt titanium slag

[0032] Mix Panzhihua 10# titanium concentrate and metallurgical coke evenly according to the mass ratio of 100:11, and then put them into a large semi-closed circular electric furnace in batches, wherein the smelting current is controlled at 25000-38000A, and the smelting voltage is controlled at 10-25 levels (180V~330V), when the power transmission is the tonnage value of the total feeding amount × 1.2MWh, the slag is discharged, and the TiO in the titanium slag is sampled and analyzed 2 The grade is 72.37%, the FeO content is 11.54%, and the flow rate of slag during slag discharge is 3.17t / min. During the slag discharge process, an appropriate amount of pulverized coal is continuously injected into the slag basin. The particle size of the pulverized coal is +300~-200 mesh, accounting for 93.74%, and the fixed carbon content is 89.12%. The gas used for injection is nitrogen, and the amount...

Embodiment 2

[0033] Embodiment 2 adopts the method of the present invention to smelt titanium slag

[0034] Mix Panzhihua 10# titanium concentrate and metallurgical coke evenly according to the mass ratio of 100:12, and then add them in batches into a large semi-closed circular electric furnace. Among them, the smelting current is controlled at 25000-38000A, and the smelting voltage is controlled at 10-25 levels (180V~330V), when the power transmission is the tonnage value of the total feeding amount × 1.25MWh, the slag is discharged, and the TiO in the titanium slag is sampled and analyzed. 2 The grade is 72.84%, the FeO content is 11.02%, and the flow rate of slag during slag discharge is 3.27t / min. During the slag discharge process, an appropriate amount of pulverized coal is continuously injected into the slag basin. The particle size of the pulverized coal is +300~-200 mesh, accounting for 93.74%, and the fixed carbon content is 89.12%. The gas used for injection is nitrogen, and the ...

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Abstract

The invention relates to a method of smelting titanium slag through a two-step method, and belongs to the field of metallurgy. The method of smelting the titanium slag through the two-step method comprises the following steps that titanium concentrate serves as a smelting raw material, electric furnace smelting operation is conducted, and the titanium slag is obtained, specifically, the grade of TiO2 of the titanium slag is 72%+ / -1%; and then slag tapping operation is conducted, a reducing agent is blown to a slag pot in the slag tapping process, the titanium slag which is discharged from a furnace is reduced to form a titanium slag product, specifically, the grade of TiO2 of the titanium slag product is 74%+ / -1%. Compared with an existing titanium slag smelting technology, the method hasthe advantages that the technological operation is easy, by means of the control over the reduction degree of the titanium slag, the content of FeO in the slag is improved, the content of the low-valence titanium oxide is reduced, and therefore the viscosity of the titanium slag is reduced, and the situations that the furnace condition is smoothly conducted, and the slag tapping operation is smoothly conducted are guaranteed.

Description

technical field [0001] The invention relates to a two-step method for smelting titanium slag, belonging to the field of metallurgy. Background technique [0002] Titanium concentrate is one of the important raw materials for smelting titanium slag. The ore is a multi-element co-associated ilmenite ore, which is difficult to extract and smelt. During the smelting process of titanium slag, the viscosity of titanium slag has an important influence on the production process, reflecting the rheological characteristics of titanium slag. If the viscosity of titanium slag is high, foamy slag will appear during the smelting process, resulting in high electrode operation and low bottom temperature. The upper temperature is high, the thermal efficiency is low, and it will cause great damage to the furnace cover, which seriously affects the direct operation of the electric furnace. In addition, if the viscosity of titanium slag is high, metallic iron cannot settle well in the slag, mak...

Claims

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Application Information

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IPC IPC(8): C22B34/12C22B5/10
CPCC22B34/1218C22B5/10
Inventor 刘娟黄家旭李凯茂肖军
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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