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Method for smelting titanium slag in titanium oxide titanium concentrate

A technology of titanium oxide and concentrate, which is applied in the field of electric furnace smelting titanium slag, can solve the problems of ineffective cost reduction, inability to change the properties of raw materials, and high cost of briquetting process, so as to shorten the smelting cycle, improve comprehensive utilization rate, reduce The effect of smelting power consumption

Active Publication Date: 2016-01-20
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

[0003] The existing briquetting process and pre-reduction process can solve the particle size problem of titanium concentrate at a certain level, but the cost of the briquetting process is high, and the properties of the raw materials cannot be changed, so that the effect of subsequent smelting to reduce costs is not obvious
The pre-reduction process is mainly due to the high cost of pelletizing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Table 1 raw material index (%)

[0039] TiO 2

Oxidation rate

S

Particle size (8 ~ 15mm ratio)

42.7

52.4

0.028

98

[0040] Table 2 Reductant index (%)

[0041] fixed carbon

Particle size<12mm

Particle size 5 ~ 12mm

85.6

100

98.6

[0042] Table 3 Feeding amount

[0043] Feeding situation

The first stage

second stage

The third phase

Total feeding amount (%)

40

35

25

Feeding amount of 1 central feeding point (%)

7

Feeding amount of the remaining 8 feeding points (%)

33

35

25

Mass ratio (titanium concentrate: coke ding)

100:14

100:13

100:13

[0044] Note: The "feed amount" mentioned in Table 3 refers to the percentage of the feed amount at this stage of the feed point to the total mass of oxidized pellets and reducing agent. The total mass of oxidized pellets and reducing age...

Embodiment 2

[0051] Table 4 raw material index (%)

[0052] TiO 2

Oxidation rate

S

Particle size (8 ~ 15mm ratio)

43.8

78.6

0.02

98

[0053] Table 5 Reductant index (%)

[0054] fixed carbon

Particle size<12mm

Particle size 5 ~ 12mm

86.2

100

98.1

[0055] Table 6 Feeding amount

[0056] Feeding situation

The first stage

second stage

The third phase

Total feeding amount (%)

50

30

20

Feeding amount of 1 central feeding point (%)

4

Feeding amount of the remaining 12 feeding points (%)

46

30

20

Mass ratio (titanium concentrate: semi-coke)

100:13

100:12

100:12

[0057] Note: The "feed amount" mentioned in Table 6 refers to the percentage of the feed amount at this stage of the feed point to the total mass of the oxidized pellets and the reducing agent. In this embodiment, the total mass of the s...

Embodiment 3

[0064] Table 7 raw material index (%)

[0065] TiO 2

Oxidation rate

S

Particle size (8 ~ 15mm ratio)

44.3

95.8

0.012

98

[0066] Table 8 Reductant index (%)

[0067] fixed carbon

Particle size<12mm

Particle size 5 ~ 12mm

90.2

100

98.9

[0068] Table 9 feed amount

[0069] Feeding situation

The first stage

second stage

The third phase

Total feeding amount (%)

60

25

15

Feeding amount of 1 central feeding point (%)

15

Feeding amount of the remaining 10 feeding points (%)

45

25

15

Mass ratio (titanium concentrate: anthracite carburizer)

100:12

100:12

100:12

[0070] Note: The "feed amount" mentioned in Table 9 refers to the percentage of the feed amount at this stage of the feed point to the total mass of the oxidized pellets and the reducing agent. In this embodiment, the total ma...

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Abstract

The invention belongs to the technology of electric furnace smelting of titanium slag, and particularly relates to a method for smelting titanium slag in titanium oxide titanium concentrate. The method aims at solving the technical problems that in the titanium slag smelting process of superfine fraction titanium concentrate in the Panxi region, power consumption is high, foaming slag is serious, and furnace conditions are damaged. According to the scheme for solving the technical problems, the method for smelting titanium slag in titanium oxide titanium concentrate comprises the following steps that firstly, charging is carried out, and oxidized pellets and a reducing agent are added to an electric furnace at the same time to be smelted; secondly, after smelting is completed, deslagging is conducted at the temperature of 1620-1680 DEG C, and titanium slag with TiO2 larger than or equal to 74% and smaller than or equal to 77% is obtained; thirdly, and tapping is conducted at the temperature of 1400-1450 DEG C, and pig iron with the C content of 2-3% and the S content of 0.7-1.5% is obtained. A development direction is provided for titanium slag smelting of titanium concentrate in the Panxi region, and a prominent function is achieved for increasing the comprehensive utilization rate of Panzhihua titanium concentrate and reducing production cost.

Description

technical field [0001] The invention belongs to the technology of electric furnace smelting titanium slag, and in particular relates to a method for smelting titanium slag with titanium oxide concentrate. Background technique [0002] The titanium slag smelting industry is developing rapidly in China, but the technology is generally backward. The Panxi area is rich in titanium resources, but due to the limitation of the beneficiation process, the particle size of titanium concentrate has become smaller and smaller in recent years, which seriously restricts its utilization in large-scale smelting of titanium slag. Coupled with the inherent low reactivity of rock ore, the power consumption is relatively high during the smelting process, and the foamy slag is serious, resulting in the deterioration of the furnace condition, which is not conducive to long-term continuous smelting. At present, the ultra-fine-grained titanium concentrate in Panxi area still cannot be smelted dire...

Claims

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Application Information

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IPC IPC(8): C22B34/12C21B11/10
Inventor 肖军刘峰韩可喜马勇缪辉俊李凯茂赵青娥刘娟
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP