Method for preparing titanium carbide slag

A titanium carbide and carbonaceous technology, applied in the field of metallurgy, can solve the problems of high power consumption, slow carbonization reaction rate, and long heating time in the production of titanium carbide slag, and achieve strong competitive advantages, low production costs, and high utilization efficiency.

Active Publication Date: 2017-02-22
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous titanium extraction process, the hot blast furnace slag was transferred into the electric furnace after long-distance transfer, and the loss of temperature drop was large. After entering the furnace, it needs to be reheated. After the temperature of the molten pool rises, the reducing agent is added for carbonization. The heating time is long and the carbonization The reaction rate is slow, and the power consumption of titanium carbide slag production is high

Method used

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Examples

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preparation example Construction

[0013] The method for preparing titanium carbide slag according to the present invention comprises: in the presence of a preheated carbonaceous reducing agent, heating and carbonizing the hot high-titanium type blast furnace slag sequentially in an electric arc furnace, wherein the The preheated carbonaceous reducing agent is added in two batches in the heating stage and the carbonization reduction stage respectively. According to the method of the present invention, the heat of combustion of the reducing agent can be rationally used to raise the temperature of the hot slag, and the energy consumption in the heating stage and the reducing stage can be reduced.

[0014] In the method of the present invention, the temperature of the preheated carbonaceous reducing agent is 400-1000°C, for example, 400°C, 450°C, 500°C, 550°C, 600°C, 650°C, 700°C, Any temperature between 750°C, 800°C, 900°C and 1000°C and the range formed by any two temperatures. In order to maximize the use of t...

Embodiment 1

[0034] Will just out of the oven, TiO 2 10 tons of hot high-titanium blast furnace slag with a content of 25% by weight and a temperature of 1450°C will flow directly into a covered thermal insulation slag tank through the slag ditch, and then transport the slag tank to a device near the slag outlet by a crane. There is an electric arc furnace top that can be unscrewed, and the hot high-titanium blast furnace slag is poured directly from the top into the electric arc furnace. Warm up and heat up. At the same time, 100kg of anthracite coal powder preheated to 500°C by the flue gas generated in the electric arc furnace is transported to the silo on the top of the electric arc furnace by a conveyor, so that it is fed into the electric arc furnace from the top of the furnace at a speed of 40kg / min. Wherein, the anthracite powder is ground by a coal mill to a particle size of 0.2mm, and its fixed carbon content is 78% by weight. During the process of adding anthracite powder, the...

Embodiment 2

[0036] Will just out of the oven, TiO 2 10 tons of hot high-titanium blast furnace slag with a content of 20% by weight and a temperature of 1530°C flows directly into a covered thermal insulation slag tank through the slag ditch, and then transports the slag tank to a device near the slag outlet by a crane. There is an electric arc furnace top that can be unscrewed, and the hot high-titanium blast furnace slag is poured directly from the top into the electric arc furnace. Warm up and heat up. At the same time, 400kg of petroleum coke powder, which is preheated to 700°C by the flue gas generated in the electric arc furnace, is transported to the silo on the top of the electric arc furnace by a conveyor, and is fed into the electric arc furnace from the top of the furnace at a speed of 35kg / min. , wherein, the petroleum coke powder is ground to a particle size of 0.5mm by a coal mill, and its fixed carbon content is 82% by weight. During the process of adding petroleum coke p...

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Abstract

The invention relates to the field of metallurgy and discloses a method for preparing titanium carbide slag. The method is characterized by comprising the following step: under the existence of a preheated carbonaceous reducing agent, performing heating and carbonizing reduction on hot high Ti-bearing slag in an electric-arc furnace in turn, wherein the preheated carbonaceous reducing agent is added twice in a temperature rise period and a carbonizing reduction period, the temperature of the preheated carbonaceous reducing agent is 400-1000 DEG C, the temperature is increased to 1400-1700 DEG C in the temperature rise period, and the final temperature in the carbonizing reduction period is at 1500-1800 DEG C. The method for preparing titanium carbide slag, provided by the invention, has the advantages of low energy consumption, high heating efficiency, short reaction time, low production cost, and the like.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for preparing titanium carbide slag. Background technique [0002] The Panxi area is endowed with unique mineral resources, and the reserves of vanadium-titanium magnetite resources are huge, and its titanium reserves account for more than 90% of the national titanium resources reserves. Blast furnace smelting vanadium-titanium magnetite will produce a large amount of slag, which contains about 15% to 25% titanium dioxide, which is called high-titanium blast furnace slag. [0003] When blast furnace smelting vanadium-titanium magnetite produces 1 ton of molten iron, about 0.65 tons of slag is produced. The stockpiling of a large amount of titanium-containing blast furnace slag will not only pollute the environment, but also cause a serious waste of titanium resources. Therefore, it is of great significance to study the comprehensive utilization of high-titanium blast furnace ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B5/06
CPCC04B5/06
Inventor 赵青娥程晓哲张兴勇王东生
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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