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Method for smelting titanium slag from titanium oxide concentrate

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

Active Publication Date: 2017-09-08
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 Particle size 5 ~ 12mm 85.6 100 98.6

[0042] Table 3 Feeding amount

[0043] Feeding situation The first stage second stage The third stage 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 agent in a single furnace in this embodiment is 140t.

[0045] In this embodiment, coke is used as th...

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 Particle size 5 ~ 12mm 86.2 100 98.1

[0055] Table 6 Feeding amount

[0056] Feeding situation The first stage second stage The third stage 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 single furnace oxidized pellets and the reducing agent is 140t.

[0058] In this embodiment, semi-c...

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 Particle size 5 ~ 12mm 90.2 100 98.9

[0068] Table 9 feed amount

[0069] Feeding situation The first stage second stage The third stage 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 mass of the single furnace oxidized pellets and the reducing agent is 140t.

[0071] In this embodim...

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Abstract

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. The technical problem to be solved by the present invention is the high power consumption, severe foamy slag, and damaged furnace conditions during the smelting process of ultrafine-grained titanium concentrate in Panxi area. The solution of the present invention to solve the above-mentioned technical problems is to provide a method for smelting titanium slag from titanium oxide concentrate, which includes the following steps: feeding: adding oxidized pellets and reducing agent to the electric furnace at the same time for smelting; Slag is tapped at 1680°C to obtain titanium slag with 77%≥TiO2%≥74%; iron is tapped at 1400-1450°C to obtain pig iron with C content of 2-3% and S content of 0.7-1.5%. It provides another development direction for smelting titanium slag from titanium concentrate in Panxi area, and plays a prominent role in improving the comprehensive utilization rate of Panzhihua titanium concentrate and reducing production costs.

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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Patent Type & Authority Patents(China)
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
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