Slag form system for smelting vanadium-titanium magnetite with electric furnace

A vanadium-titanium magnetite and electric furnace smelting technology, applied in electric furnaces, furnace types, furnaces, etc., can solve problems such as difficult recovery of titanium resources, difficult control of slag iron, and furnace lining erosion, so as to reduce production costs and reduce the difficulty of smelting operations , reduce the effect of erosion

Active Publication Date: 2019-11-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the smelting process of vanadium-titanium magnetite in the prior art that titanium and vanadium oxides are hard to control the direction of reduction, slag and iron are difficult to separate, the furnace lining is corroded seriously, and titanium resources are difficult to recycle. The direction control of vanadium and titanium in the electric furnace smelting process of titanium magnetite and the slag type system of titanium recovery reduce the difficulty of smelting operation and provide technical support for the industrial application of comprehensive utilization of vanadium titanium magnetite by pre-reduction-electric furnace method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add vanadium-titanium magnetite concentrate pre-reduced pellets, calcium-containing flux, magnesium-containing flux and reducing agent into the electric furnace in proportion, according to MgO:TiO 2 Add magnesia flux at a molar ratio of 0.8:1, and prepare a basicity of 0.8 according to the pre-reduction product composition of vanadium titanium magnetite concentrate (mass ratio CaO: SiO 2 ), the smelting temperature is 1550°C, the smelting time is 60min, and the carbon content is 2%. The vanadium-containing molten iron and titanium-containing slag are separated, and the obtained vanadium-containing molten iron is used to extract vanadium in the converter to obtain TiO 2 =48.15% of titanium-containing slag, the main phase of titanium-containing slag is magnesium metatitanate, titanium-containing slag can be prepared by sulfuric acid method to obtain titanium dioxide.

Embodiment 2

[0022] Add the vanadium-titanium magnetite concentrate pre-reduction product, calcium-containing flux, magnesium-containing flux and reducing agent into the electric furnace in proportion, according to MgO:TiO 2 Add magnesia flux at a molar ratio of 1:1, and prepare a basicity of 0.7 according to the pre-reduction product composition of vanadium-titanium magnetite concentrate (mass ratio CaO: SiO 2 ), the smelting temperature is 1600°C, the smelting time is 40min, and the carbon content is 2%. The vanadium-containing molten iron and the titanium-containing slag are separated, and the obtained vanadium-containing molten iron is used to extract vanadium in the converter to obtain TiO 2 =46.45% of titanium-containing slag, the main phase of titanium-containing slag is magnesium metatitanate, titanium-containing slag can be prepared by sulfuric acid method to obtain titanium dioxide.

Embodiment 3

[0024] Add vanadium-titanium magnetite concentrate pre-reduction products, calcium-containing flux, magnesium-containing flux and reducing agent into the electric furnace in proportion, according to MgO:TiO 2 Add magnesia flux at a molar ratio of 1.1:1, and prepare a basicity of 0.6 according to the pre-reduction product composition of vanadium-titanium magnetite concentrate (mass ratio CaO: SiO 2 ), the smelting temperature is 1650°C, the smelting time is 20min, and the carbon content is 2%. The vanadium-containing molten iron and titanium-containing slag are separated, and the obtained vanadium-containing molten iron is used to extract vanadium in the converter to obtain TiO 2 =45.90% titanium-containing slag, the main phase of titanium-containing slag is magnesium metatitanate, titanium-containing slag can be prepared by sulfuric acid method to obtain titanium dioxide.

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Abstract

The invention discloses a slag form system for smelting vanadium-titanium magnetite with an electric furnace, and belongs to the field of comprehensive utilization of schreyerite. The slag form systemis characterized in that low-silicon vanadium-titanium magnetite concentrate is taken as a raw material; a pre-reduced product of the vanadium-titanium magnetite concentrate is fed into the electricfurnace for smelting; a calcium-containing and magnesium-containing solvent is added in a mass ratio of 0.6 to 1.0 of CaO to SiO2, and a molar ratio of 1.1 to 0.8 of MgO to TiO2 for regulating the slag composition; and a major titanium-containing phase in the slag refers to a magnesium metatitanate phase. Through adoption of the slag form system disclosed by the invention, the inclusion of molteniron in vanadium and the inclusion of slag in vanadium can be effectively controlled during smelting of the electric furnace; vanadium can be recovered from obtained vanadium-containing molten iron through vanadium extraction with a converter; the titanium-containing slag meets the requirement on a sulfate process titanium dioxide raw material; and the comprehensive utilization of iron, vanadium and titanium in the vanadium-titanium magnetite can be realized. in the smelting process, the vanadium-titanium trend is easy to control, and the smelting operation difficulty is low.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of vanadium-titanium ore, and in particular relates to a slag-type system for smelting vanadium-titanium magnetite in an electric furnace. Background technique [0002] my country has huge reserves of vanadium-titanium magnetite resources, but the overall level of development and utilization is still very low. Taking vanadium-titanium magnetite resources in Panxi area as an example, in the production process dominated by steel, the current recovery and utilization of titanium and vanadium Therefore, improving the comprehensive utilization level of my country's vanadium-titanium magnetite resources is of great significance to the development of my country's steel and vanadium-titanium industries. [0003] Among the current processing methods for vanadium-titanium magnetite concentrate, non-blast furnace methods can realize all-vanadium-titanium ore smelting, and the recovery rate of iron, va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/12C22B34/12
CPCC21B13/0006C21B13/006C21B13/008C21B13/12C22B34/1218
Inventor 王帅郑富强陈凤杨凌志郭宇峰邱冠周姜涛
Owner CENT SOUTH UNIV
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