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System and method for preparing titanium carbide from vanadium titano-magnetite comprehensively

A technology of vanadium-titanium magnetite and titanium carbide is applied in the field of metallurgy, which can solve the problems of high energy consumption and incapability of resource utilization of titanium-containing blast furnace slag, and achieve the effects of high product value, increased added value and environmental friendliness.

Pending Publication Date: 2018-02-02
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to propose a new gas-based direct reduction of vanadium-titanium magnetite to produce semi-steel, vanadium slag and carbonized Titanium method, making full use of the advantages of high titanium content (60-80wt%) in the slag phase of sponge iron after gas-based shaft furnace reduction, producing titanium carbide products, and resource utilization of titanium resources

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  • System and method for preparing titanium carbide from vanadium titano-magnetite comprehensively
  • System and method for preparing titanium carbide from vanadium titano-magnetite comprehensively

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Embodiment 1

[0069] The present embodiment provides a kind of method for preparing titanium carbide, and concrete steps are as follows:

[0070] (11) The vanadium-titanium-magnetite, binder and water are mixed and pelletized in the pelletizing device at a mass ratio of 88:3:9 to obtain vanadium-titanium-magnetite pellets. The TF of the vanadium titanomagnetite is 59wt%, TiO 2 is 13wt%. The binder is sodium carboxymethyl cellulose.

[0071] (12) Roasting the vanadium-titanium-magnetite pellets in a roasting device after drying to obtain the vanadium-titanium-magnetite oxidized pellets with a porosity of 22%. The calcination temperature is 1250° C., and the calcination time is 20 minutes. The strength of the oxidized pellets was 1850N / piece.

[0072] (13) Using reducing gas containing methane to reduce vanadium-titanium magnetite oxidized pellets in the gas-based shaft furnace to obtain vanadium-titanium ore sponge iron, the reduction temperature is 1000°C. In the reducing gas, the meth...

Embodiment 2

[0080] The present embodiment provides a kind of method for preparing titanium carbide, and concrete steps are as follows:

[0081] (11) The vanadium-titanium magnetite, binder and water are mixed and pelletized in the pelletizing device at a mass ratio of 91:2:7 to obtain vanadium-titanium magnetite pellets. The TF of the vanadium-titanium magnetite is 61wt%, TiO 2 is 10wt%. The binder is sodium carboxymethyl cellulose.

[0082] (12) Roasting the vanadium-titanium-magnetite pellets in a roasting device after drying to obtain the vanadium-titanium-magnetite oxidized pellets with a porosity of 24%. The calcination temperature is 1250° C., and the calcination time is 20 minutes. The strength of the oxidized pellets was 1800N / piece.

[0083] (13) Using methane-containing reducing gas to reduce vanadium-titanium magnetite oxidized pellets in the gas-based shaft furnace to obtain vanadium-titanium magnetite sponge iron, the reduction temperature is 1050°C. In the reducing gas,...

Embodiment 3

[0091] The present embodiment provides a kind of method for preparing titanium carbide, and concrete steps are as follows:

[0092] (11) The vanadium-titanium magnetite, binder and water are mixed and pelletized in the pelletizing device at a mass ratio of 90:3:7 to obtain vanadium-titanium magnetite pellets. The TF of the vanadium titanomagnetite is 64wt%, TiO 2 is 7wt%. The binder is sodium carboxymethyl cellulose.

[0093] (12) Roasting the vanadium-titanium-magnetite pellets in a roasting device after drying to obtain the vanadium-titanium-magnetite oxidized pellets with a porosity of 21%. The calcination temperature is 1250° C., and the calcination time is 20 minutes. The strength of the oxidized pellets was 1900N / piece.

[0094] (13) Using methane-containing reducing gas to reduce vanadium-titanium magnetite oxidized pellets in the gas-based shaft furnace to obtain vanadium-titanium ore sponge iron, the reduction temperature is 1100°C. In the reducing gas, the metha...

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Abstract

The invention relates to a system for comprehensively utilizing vanadium-titanium-magnetite to prepare titanium carbide, wherein the system includes a gas-based shaft furnace, a melting separator and a separation and purification system, and the gas-based shaft furnace includes an inlet of vanadium-titanium-magnetite oxidation pellets , reducing gas inlet and vanadium-titanium ore sponge iron outlet, melting separator includes vanadium-titanium ore sponge iron inlet, hydrogen inlet, tail gas outlet, vanadium-containing molten iron outlet and titanium carbide-rich slag outlet, and the separation and purification system includes titanium carbide-rich slag inlet And the titanium carbide outlet, the vanadium-titanium ore sponge iron outlet of the gas-based shaft furnace is connected to the vanadium-titanium ore sponge iron inlet of the melter, the tail gas outlet of the melter is connected to the reducing gas inlet of the gas-based shaft furnace, and the carbonization of the melter The titanium carbide slag outlet is connected to the titanium carbide-rich slag inlet of the separation and purification system. The invention also relates to a method of producing titanium carbide using the system. The system adopts the short-process smelting process of vanadium-titanium magnetite gas-based direct reduction-melting separation, which can make full use of TiO2 in the slag, and the obtained products have high value and are environmentally friendly.

Description

technical field [0001] The invention generally relates to the technical field of metallurgy, in particular to a system and method for comprehensively utilizing vanadium-titanium magnetite to prepare titanium carbide. Background technique [0002] Titanium carbide (TiC) is a copper-gray crystal with metallic luster, and its crystal structure is a tetragonal system. TiC has a high melting point and hardness, with a melting point of 3150°C±10°C, a boiling point of 4300°C, a Mohs hardness of 9.5, and a microhardness of 2.795GPa. Its hardness is second only to diamond. TiC has good thermal conductivity and electrical conductivity, and its electrical conductivity decreases as the temperature increases, which shows that TiC also has metallic properties. TiC is the hardest known carbide and is an important raw material for the production of cemented carbide. Therefore, tools containing TiC have higher cutting speed and longer service life than tools made of tungsten carbide (WC) a...

Claims

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Application Information

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IPC IPC(8): C21B13/02C01B32/921
CPCC21B13/023C01P2006/80C21B13/006
Inventor 员晓温雨鑫裴培赵吉诗刘亮曹志成吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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