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Method for producing titanium carbide slag

A technology of titanium carbide and titanium slag, applied in the field of titanium metallurgy, can solve the problems of low content, low specific gravity of carbonaceous reducing agent, poor fluidity, etc.

Active Publication Date: 2010-03-10
PANGANG GROUP RESEARCH INSTITUTE CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to titanium-containing blast furnace slag TiO 2 Low content (15% ~ 30%), the specific gravity is about 2.0g / cm 3 ~2.2g / cm 3 , the carbonaceous reducing agent has a small specific gravity (0.8g / cm 3 ~1.2g / cm 3 ), so the titanium-containing blast furnace slag cannot be effectively mixed with the carbonaceous reducing agent during the carbonization reaction, which makes the carburizing effect of the carbonaceous reduction molten pool poor during the high-temperature carbonization process, resulting in an uncontrollable smelting end point
When the smelting end point is uncontrollable, the time and process of adjusting the end point are prolonged, resulting in a substantial increase in smelting power consumption
[0004] In addition, the titanium-containing blast furnace slag is a typical short slag with a high melting point and poor fluidity. At the same time, the titanium carbide with a high melting point generated during the smelting process is dispersed in the molten pool and continuously enriched to the bottom of the furnace during the smelting process, resulting in Abnormal furnace conditions such as foamy slag and furnace bottom rise seriously affect slag discharge
Chinese patent CN101168801A discloses a foam slag control method in the reduction carbonization process of titanium-containing raw materials, but this method is not conducive to exerting the power of the electric furnace, and the smelting strength of the electric furnace is usually less than 50% of the rated power, which is not conducive to energy saving and large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The raw material used in the method of this embodiment is as follows: 3.5 tons (t) of titanium dressing tailings under normal temperature, its TiO 2 content of 32.50%, TFe content of 29.1%, particle size below 200 mesh (0.074mm) accounted for 80%; blast furnace smelting vanadium-titanium magnetite by-product of hot state titanium-containing blast furnace slag 15t, its temperature is 1235 ℃, TiO 2 content of 20.75%, FeO content of 2.5%, Fe 2 o 3 content of 5.8%, MFe (metallic iron) content of 2%; pellets containing coke powder and titanium tailings, the pellets are made of 4.2t coke powder, 4.5t of the above-mentioned titanium tailings, 175kg binder, water Prepared by briquetting and drying, the binder is composed of 100kg bentonite and 75kg asphalt powder, the fixed carbon content of the coke powder is 78.0%, the water content of the pellet is 4%, and the dry ball bulk density is 1.55g / cm 3 .

[0055] Add 3.5t of the above-mentioned titanium-selected tailings at norm...

Embodiment 2

[0057] The raw materials used in the method of this embodiment are as follows: 4.0t of titanium slag electric furnace dust collection dust under normal temperature, its TiO 2content of 25.5%, TFe content of 27.1%, particle size below 200 mesh (0.074mm) accounted for 90.5%; blast furnace smelting vanadium-titanium magnetite by-product of hot state titanium-containing blast furnace slag 18t, its temperature is 1275 ℃, TiO 2 content of 21.45%, FeO content of 2.4%, Fe 2 o 3 The MFe content is 6.2%, and the MFe content is 3%. It contains pellets of anthracite and titanium slag electric furnace dust collection ash. Balls are prepared by drying, the binder is composed of 155kg bentonite and 45kg pitch powder, the fixed carbon content of anthracite is 80.5%, the water content of the pellets is 3%, and the dry ball bulk density is 1.60g / cm 3 .

[0058] Add 4.0t of titanium slag electric furnace ash at room temperature to the bottom of a 9000kVA carbonized electric furnace through ma...

Embodiment 3

[0060] The raw materials used in the method of this embodiment are as follows: 5 tons of hot titanium slag produced by melting the metallized pellets obtained by reducing vanadium-titanium magnetite with a rotary hearth furnace, the temperature is 1550 ° C, and the TiO 2 The content of TFe is 35%, and the content of TFe is 12.5%. The hot state titanium-containing blast furnace slag produced by blast furnace smelting vanadium-titanium magnetite is 15t, and its temperature is 1425 ° C. TiO 2 content of 22.5%, FeO content of 2.5%, Fe 2 o 3 The content of MFe is 5.3%, and the content of MFe is 2.0%. It contains steelmaking recarburizer and pellets of titanium slag produced by melting the metallized pellets obtained by reducing vanadium-titanium magnetite with a rotary hearth furnace. The pellets are made of 5t of steelmaking recarburizer, 7.5t of metallized pellets obtained by reducing vanadium-titanium magnetite with a rotary hearth furnace, cold titanium slag produced by meltin...

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Abstract

The invention provides a method for producing titanium carbide slag, comprising the steps of: heating raw material mixture containing first titanium-containing mineral, second titanium-containing mineral and pellets containing carbonaceous reducing agent and third titanium-containing mineral by a reactor; and leading the carbonaceous reducing agent to react with titanium oxides and iron oxides inthe first, the second and the third titanium-containing minerals to respectively generate titanium carbide and simple substance of iron. The method can improve the carburization effect of a carbonaceous reducing molten pool in the high temperature carbonization process, thus easily controlling the finishing point of smelting; in addition, the method also reduces abnormal furnace conditions such asfoaming slag, rising hearth, etc.

Description

technical field [0001] The invention relates to the field of titanium metallurgy, in particular to a method for producing titanium carbide slag from titanium-containing minerals. Background technique [0002] Regarding the recovery and utilization of titanium resources in titanium-containing minerals, high-temperature carbonization-low temperature chlorination to produce TiCl 4 Compared with other process routes (such as sulfuric acid leaching to produce titanium dioxide and scandium, electric furnace smelting to produce titanium-silicon alloy, etc.), the process has the advantages of short process flow, large processing capacity, and high yield of titanium extraction, and has good Research foundation and industrialization platform. Preparation of TiCl by High Temperature Carbonization-Low Temperature Chlorination 4 The process route is roughly as follows: TiO in titanium-containing blast furnace slag is treated at high temperature 2 Carry out carbonization to convert tit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B5/10C22B7/04C22B34/12C21B15/00
CPCY02P10/20
Inventor 周玉昌杨仰军张继东赵青娥黄家旭李良陈建平
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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