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A kind of preparation method of titanium pellets for refining high titanium slag

A technology of high-titanium slag and titanium balls, which is applied in the field of metallurgy, can solve the problems that the strength of titanium pellets used for smelting high-titanium slag is difficult to meet the requirements, the difficulty of increasing semi-steel and high-titanium slag, and the bursting of cold-set forming furnace materials, etc. Achieve the effects of easy industrial control, high titanium dioxide yield, gas permeability and stable reduction rate

Active Publication Date: 2015-11-18
攀枝花一立矿业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among them, titanium concentrate is directly added to the electric furnace in the form of powder, and its disadvantages are: large amount of furnace dust, serious pollution, harsh operating environment, TiO 2 low yield
And the sulfur content in the high-titanium slag is as high as 1%, and the sulfur content in the by-product semi-steel is also more than 1%, which increases the difficulty of further deep processing of the semi-steel and high-titanium slag; the other is that the titanium concentrate is added after pressing and cold-setting The disadvantage of the electric furnace is that the cold-set forming furnace material bursts in the furnace, causing the furnace condition to be unstable, and the TiO 2 The yield is only 83% to 88%, and there is also the problem of high sulfur content in the product high-titanium slag and the by-product semi-steel
However, the iron content in titanium concentrate is only 30% to 34%, which leads to the 2 o 3 The total amount is low, making it difficult for the strength of titanium pellets used in high titanium slag to meet the requirements

Method used

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  • A kind of preparation method of titanium pellets for refining high titanium slag
  • A kind of preparation method of titanium pellets for refining high titanium slag
  • A kind of preparation method of titanium pellets for refining high titanium slag

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preparation example Construction

[0025] The preparation method of the titanium pellets for smelting high titanium slag includes the following steps: batching, drying, finely grinding and mixing, roll forming, oxidizing roasting, and cooling.

[0026] Specifically, the drying temperature described in the above preparation method is 500°C-700°C, and the water content of the titanium concentrate after drying is 5%-7%.

[0027] Specifically, the fine grinding and mixing described in the above preparation method refers to adding organic forming additives to the titanium concentrate and finely grinding until the mass percentage of the titanium concentrate with a particle size of <0.075 mm is greater than 80%.

[0028] Concretely, the oxidative roasting mentioned in the above-mentioned preparation method refers to raising the temperature of the roll-molded green balls to 1150°C-1250°C with the furnace, and roasting and solidifying them in an oxidizing atmosphere with an excess oxygen content of 9-14% in the roasting ...

Embodiment 1

[0043] Send the titanium concentrate 1 (see Table 1 for the main chemical composition) into a dryer and dry it at 600°C for 30 minutes. After drying, the moisture content of the titanium concentrate is 6%. 0.6% of the total mass of the titanium concentrate is added with organic forming additives (among them, organic forming additives are composed of 95% polyacrylamide and 5% calcium oxide), and placed in a mill to finely grind to a particle size of less than 0.075mm The mass percentage of titanium concentrate reaches 86%. While finely grinding, the titanium concentrate particles and organic molding additives are fully mixed, and the mixed material is sent to a disc pelletizer for molding, and the rolling-formed raw balls are sent to Put it into the roasting furnace for oxidative roasting, the roasting temperature rises to 1200°C with the furnace, the excess oxygen content in the roasting furnace is 10% to 12%, and the soaking time is 100min. The mass percentage of titanium pel...

Embodiment 2

[0045] Send the titanium concentrate 2 (see Table 1 for the main chemical composition) into the dryer and dry it at 600°C for 30 minutes. After drying, the moisture content of the titanium concentrate is 6%. 0.6% of the total mass of organic forming additives (among them, organic forming additives are composed of 90% polyacrylamide and 10% calcium oxide) are added to the final titanium concentrate, and placed in a mill for fine grinding until the particle size is less than 0.075mm The mass percentage of titanium concentrate reaches 85%. While finely grinding, the titanium concentrate particles and organic molding additives are fully mixed, and the mixed material is sent to a disc pelletizer for molding, and the rolled pellets Send it into the roasting furnace for oxidative roasting, the roasting temperature rises to 1250°C with the furnace, the excess oxygen content in the roasting furnace is 11% to 13%, and the soaking time is 90 minutes. The mass percentage of titanium pelle...

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Abstract

The invention belongs to the field of metallurgy, and particularly relates to a titanium pellet for smelting high titanium slag and a preparation method thereof. The titanium pellet for smelting high titanium slag comprises following main components: 41%-49% of TiO2, 31%-34% of TFe, 0.3-2% of FeO, and 42%-47% of Fe2O3, wherein the mass percent of the titanium pellet with particle size of 5mm-20mm is greater than 90%, the main raw material comprises titanium concentrate and an organic molding additive formed by mixing polyacrylamide and calcium oxide, and the organic molding additive accounts for 0.5%-1.0% the total mass of the titanium concentrate. The invention also provides the preparation method for the titanium pellet for smelting high titanium slag. The method comprises following steps of burdening, drying, finely grinding uniformly, rolling to mold, oxidizing roasting, and cooling. The titanium pellet prepared by the method is used for smelting high titanium slag.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a titanium pellet for refining high-titanium slag and a preparation method thereof. Background technique [0002] High-grade titanium-rich materials are the main raw materials for titanium dioxide and titanium materials industry, and the titanium ore produced in Panzhihua is iron-titanium symbiotic rock ore, TiO 2 The content is low, the composition is complex, and the existing beneficiation technology can only obtain TiO 2 Titanium concentrate with a content of only about 47% cannot directly meet the requirements of the chloride-process titanium dioxide and Haijin Titanium Industry for high-grade titanium-rich materials. 2 enrichment. [0003] Enriched TiO 2 It is the first step to obtain the high-quality raw material for the production of titanium tetrachloride, titanium dioxide and titanium sponge - high-titanium slag. The main method is to mix TiO 2 Titanium concentr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/24C22B1/02
Inventor 赵一刚何建平曾永福
Owner 攀枝花一立矿业股份有限公司
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