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Method for utilizing vanadium-titanium-secondary iron concentrate to smelt acid-soluble titanium slag by way of smelting reduction

An acid-soluble titanium slag and 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 material collapse, and long reduction time, so as to improve overall economic benefits and resources. High comprehensive utilization rate and the effect of reducing the temperature of the smelting reduction process

Active Publication Date: 2012-04-18
PANGANG GROUP RESEARCH INSTITUTE CO LTD +1
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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%) used 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, K2O: 0.027. The composition (wt%) of the vanadium-titanium iron concentrate used is as follows: TiO 2 : 14.81; SiO 2 : 9.21; TFe: 45.80; Al 2 O 3 : 3.70; MgO: 4.00; CaO: 2.5; FeO: 23.59; MnO: 0.286. The vanadium-titanium secondary iron concentrate and the titanium concentrate are mixed in a weight ratio of (2:8) to form a mixed ore. The mixed ore, pitch and coke powder are blended in a weight ratio of 100:6.5:155 to form a mixture. Load into electric furnace according to batches for reduction. First, perform solid-state direct reduction at a temperature range of about 750°C to 800°C for about 60 minutes, and then heat up to 1500°C to 1550°C for molten state reduction. The time for molten state reduction is about 90 minutes. Then the slag-iron separation is carried out. The melt...

example 2

[0034] The composition of the titanium concentrate and vanadium-titanium sub-iron concentrate in this example is the same as in Example 1. The vanadium-titanium secondary iron concentrate and the titanium concentrate are mixed in a weight ratio of (3:7) to form a mixed ore. The mixed ore, pitch and coke powder are mixed according to the weight ratio of 100:6.5:170 to form a mixture. Load into electric furnace according to batches for reduction. First, perform solid-state direct reduction at a temperature range of about 1100°C to 1150°C for about 60 minutes, and then heat up to 1300°C to 1350°C for molten state reduction. The time for molten state reduction is about 90 minutes. Then carry out slag-iron molten state reduction and separation. The melting temperature is about 1650℃. When melting, add some anthracite to adjust the titanium slag grade and furnace condition. The added amount of anthracite is 15% of the amount of carbonaceous reducing agent. Semi-steel and titanium s...

example 3

[0036] The composition of the titanium concentrate and vanadium-titanium sub-iron concentrate in this example is the same as in Example 1. The vanadium-titanium secondary iron concentrate and the titanium concentrate are mixed in a weight ratio of (4:6) to form a mixed ore. The mixed ore, pitch and coke powder are blended in a weight ratio of 100:6.5:180 to form a mixture. Load into electric furnace according to batches for reduction. First, perform solid-state direct reduction at a temperature range of about 1100°C to 1150°C for about 60 minutes, and then heat up to 1300°C to 1350°C for molten state reduction. The time for molten state reduction is about 90 minutes. Then carry out slag-iron molten state reduction and separation. The melting temperature is about 1650℃. When melting, add some anthracite to adjust the titanium slag grade and furnace condition. The added amount of anthracite is 15% of the amount of carbonaceous reducing agent. Semi-steel and titanium slag. By s...

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Abstract

The invention provides a method for utilizing vanadium-titanium-secondary iron concentrate to smelt acid-soluble titanium slag by way of smelting reduction. The method includes the following steps: the vanadium-titanium-secondary iron concentrate and titanium concentrate are mixed and added with carbonaceous reducing agent and binder to form mixture; the mixture is reduced, and slag-iron separation is then carried out in order to obtain semisteel and titanium slag; water is sprayed on the surface of the titanium slag obtained in slag-iron separation, so that the temperature of the titanium slag can rapidly cross a temperature range between 600 DEG C and 850 DEG C in the process of cooling, and thereby the acid-soluble titanium slag is formed. The method can efficiently utilize Fe and TiO2 in the vanadium-titanium-secondary iron concentrate, and has the advantages of smooth reaction in the smelting reduction process, good effect in the smelting and separation processes, stable furnace state, short smelting period, low electricity consumption level, low product cost and the like.

Description

Technical field [0001] The invention relates to the field of titanium slag metallurgy, and more specifically, to a method capable of smelting acid-soluble titanium slag by using vanadium-titanium subiron concentrate. Background technique [0002] my country's Panxi area is rich in titanium concentrate, vanadium-titanium iron concentrate and vanadium-titanium secondary iron concentrate. As a standard product, ilmenite is the main raw material of various titanium industries, and the titanium content in it is usually based on titanium dioxide (TiO 2 ) The weight percentage is not less than 45%, the total iron (TFe) content is about 35wt%, and the FeO content is about 33wt%. Vanadium-titanium iron concentrate is a standard product, and the titanium content in it is usually based on titanium dioxide (TiO 2 ) The weight percentage is 8%-13%, the total iron (TFe) content is about 54wt%, and the FeO content is about 33wt%. Generally, vanadium-titanium sub-iron concentrate is a mineral b...

Claims

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Application Information

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IPC IPC(8): C21B13/00C22B34/12C22B5/10
Inventor 杨保祥
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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