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Two-step method for smelting titanium slag

A technology of titanium slag and step method, which is applied in the field of metallurgy, can solve problems such as difficulty in realization, and achieve the effects of reducing production costs, shortening smelting time, and smooth slag discharge

Active Publication Date: 2022-03-22
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Two-step method for smelting titanium slag

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Comparison scheme
Effect test

Embodiment 1

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

[0032] The Panzhihua 10# titanium concentrate and metallurgical coke are mixed uniformly according to the mass ratio of 100:11 and then added to the large semi-closed circular electric furnace in batches. The smelting current is controlled at 25000-38000A, and the smelting voltage is controlled at 10-25 gears. (180V ~ 330V), when the power transmission is the tonnage value of the total feeding amount × 1.2MWh, the slag is discharged, and the TiO2 in the titanium slag is sampled and analyzed. 2 The grade is 72.37%, the FeO content is 11.54%, and the slag flow rate is 3.17t / min during slagging. During the process of slag removal, a proper 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 of coal ...

Embodiment 2

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

[0034] The Panzhihua 10# titanium concentrate and metallurgical coke are mixed uniformly according to the mass ratio of 100:12 and then added to the large semi-closed circular electric furnace in batches. The smelting current is controlled at 25000-38000A and the smelting voltage is controlled at 10-25 gear (180V ~ 330V), when the power transmission is the tonnage value of the total feeding amount × 1.25MWh, the slag is discharged, and the TiO2 in the titanium slag is sampled and analyzed. 2 The grade is 72.84%, the FeO content is 11.02%, and the slag flow rate is 3.27t / min during slagging. In the process of slag removal, a proper 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 of coal inject...

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Abstract

The invention relates to a two-step method for smelting titanium slag, belonging to the field of metallurgy. The invention provides a two-step method for smelting titanium slag, which includes the following steps: using titanium concentrate as a smelting raw material, first smelting in an electric furnace to obtain TiO 2 Titanium slag with a grade of 72% ± 1%, and then slag is discharged. During the process of slag discharge, a reducing agent is sprayed into the slag basin to reduce the discharged titanium slag to TiO 2 Titanium slag products with a grade of 74%±1%. Compared with the existing titanium slag smelting process, the process of the present invention is simple to operate. By controlling the reduction degree of titanium slag, the content of FeO in the slag is increased and the content of low-valent titanium oxide is reduced, thereby reducing the viscosity of titanium slag, ensuring smooth furnace conditions and smooth slag discharge. Row.

Description

technical field [0001] The invention relates to a method for smelting titanium slag by a two-step method, and belongs to the field of metallurgy. Background technique [0002] Ilmenite concentrate is one of the important raw materials for smelting titanium slag. The ore is an ilmenite ore associated with multiple elements, 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, which reflects the rheological properties of titanium slag. The upper temperature is high, the thermal efficiency is low, and it will cause great damage to the furnace cover, which will seriously affect the forward running of the electric furnace. In addition, if the viscosity of the titanium slag is large, the metal iron will not be able to settle in the slag well, making the separation of the slag and iron difficult, and the phenomenon of seeing iron in the slag will reduce the TiO co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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