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Method for reducing and smelting titania slag by utilizing vanadium-titanium-iron ore concentrates in molten state

An acid-soluble titanium slag and vanadium-titanium-iron concentrate technology, applied in fluidized bed furnaces and other directions, can solve the problems of backward technical and economic indicators, prone to slag turning and collapse, and long reduction time, so as to improve the overall economic benefits. , The effect of stable electric furnace conditions and reducing the temperature of the smelting reduction process

Active Publication Date: 2012-04-04
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

However, due to the TiO 2 The grade is high, so its smelting process is in a state of more slag and less iron. Most of the smelting process is slag at high temperature, so the reduction time period of each furnace needs about 2 to 3.5 hours, and it is easy to appear during the reduction process. Phenomena such as slag turning and collapse
Moreover, the reduction time of the whole process is long, excessive use of fine materials results in waste of low-grade resources, and backward technical and economic indicators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] The titanium concentrate composition (wt%) that adopts is as follows: TiO 2 : 45.79; SiO 2 : 3.45; total iron (TFe): 33.40; Al 2 o 3 : 1.04; MgO: 2.68; CaO: 1.77; FeO: 35.70; MnO: 0.891, Na 2 O: 0.056,K 2 O: 0.027. The vanadium-titanium iron ore concentrate composition (wt%) that adopts is as follows: TiO 2 : 12.73; SiO 2 : 3.16; TFe: 54.31; Al 2 o 3 : 3.50; MgO: 2.79; CaO: 0.918; FeO: 33.93; MnO: 0.419; 2 O: 0.034; K 2 O: <0.02. The vanadium-titanium iron concentrate and the titanium concentrate are mixed in a weight ratio of (2:8) to form a mixed ore. The mixed ore, asphalt and coke powder are mixed according to the weight ratio of 100:6.5:155 to form a mixture. According to the batch into the electric furnace for reduction. First, in the temperature range of about 750°C to 800°C, perform solid state direct reduction for about 60 minutes, and then raise the temperature to 1500°C to 1550°C for molten state reduction, and the time for molten state reduction...

example 2

[0034] The composition of the titanium concentrate and the vanadium-titanite concentrate in this example is the same as in Example 1. The vanadium-titanium iron concentrate and the titanium concentrate are mixed in a weight ratio of (3:7) to form a mixed ore. The mixed ore, asphalt and coke powder are mixed according to the weight ratio of 100:6.5:170 to form a mixture. According to the batch into the electric furnace for reduction. In the temperature range of about 1100°C to 1150°C, perform solid state direct reduction for about 60 minutes, then raise the temperature to 1300°C to 1350°C for melt state reduction, and the time for melt state reduction is about 90 minutes. Then carry out slag-iron fusion reduction separation, the melting temperature is about 1650 °C, add some anthracite to adjust the titanium slag grade and furnace conditions during melting, the additional amount of anthracite is 15% of the amount of carbonaceous reducing agent, obtained by melting and separati...

example 3

[0036] The composition of the titanium concentrate and the vanadium-titanite concentrate in this example is the same as in Example 1. The vanadium-titanium iron concentrate and the titanium concentrate are mixed in a weight ratio of (4:6) to form a mixed ore. The mixed ore, asphalt and coke powder are mixed according to the weight ratio of 100:6.5:180 to form a mixture. According to the batch into the electric furnace for reduction. In the temperature range of about 1100°C to 1150°C, perform solid state direct reduction for about 60 minutes, then raise the temperature to 1300°C to 1350°C for melt state reduction, and the time for melt state reduction is about 90 minutes. Then carry out slag-iron fusion reduction separation, the melting temperature is about 1650 °C, add some anthracite to adjust the titanium slag grade and furnace conditions during melting, the additional amount of anthracite is 15% of the amount of carbonaceous reducing agent, obtained by melting and separati...

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Abstract

The invention provides a method for reducing and smelting titania slag by utilizing vanadium-titanium-iron ore concentrates in a molten state. The method comprises the following steps: mixing the vanadium-titanium-iron ore concentrates with titanium ore concentrates and adding a carbonaceous reducing agent and a binder, thus forming a mixture; reducing the mixture and then performing slag-iron separation treatment, thus obtaining semisteel and titanium slag; and spraying water to the surface of the titanium slag obtained through slag-iron separation treatment so as to rapidly cool the titanium slag to 600-850 DEG C in a cooling process, thus forming the acidsoluble titania slag. The method provided by the invention can be used for efficiently utilizing the Fe and TiO2 in the vanadium-titanium-iron ore concentrates and has the advantages of stable molten-state reduction process, good effect in smelting and separating process, stable furnace condition, short smelting period, low power consumption level, low production cost and the like.

Description

technical field [0001] The invention relates to the field of titanium slag metallurgy, and more specifically relates to a method capable of smelting acid-soluble titanium slag by utilizing vanadium-titanium iron concentrate. Background technique [0002] my country's Panxi region is rich in vanadium-titanium iron concentrate. Usually, vanadium-titanium iron ore concentrate is a standard product, and the titanium content in it is calculated according to titanium dioxide (TiO 2 ) is 8% to 13% by weight, the total iron (TFe) content is about 54wt%, and the FeO content is about 33wt%. Due to the low titanium content in vanadium-titanium iron concentrate, vanadium-titanium iron concentrate is mainly used as raw material for blast furnace ironmaking, and titanium element enters blast furnace slag after blast furnace ironmaking process. In the prior art, the process of recovering and utilizing the titanium element in the blast furnace slag usually has the disadvantages of high co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C22B9/10C21B13/00
Inventor 杨保祥张继东韩可喜赵青娥李开华陈元忠冉显俊张兴勇李良黄家旭
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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