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Method of preparing ferrotitanium alloy powder by adopting ferrovanadium slag and vanadium-titanium magnetite tailings

A technology of vanadium-titanium magnet and iron-titanium alloy, which is applied in the direction of improving process efficiency and can solve the problems of large industrial demand and high cost

Inactive Publication Date: 2019-01-04
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Ferro-titanium alloy is a deoxidizer for iron and steel metallurgy, which has a great industrial demand, and the cost of traditional alloy preparation methods remains high

Method used

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  • Method of preparing ferrotitanium alloy powder by adopting ferrovanadium slag and vanadium-titanium magnetite tailings

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preparation example Construction

[0019] A kind of preparation method of iron-titanium alloy powder material of the present invention comprises the following steps:

[0020] (1) According to (89.8~95): (1.6~3.3): (3.4~6.9) ratio weighed alum slag, graphite powder and calcium carbonate powder, placed in a stirring ball mill with a speed of 260~350 rpm, The ball-to-material ratio is 3:1, ball milled for 15 to 25 hours, and uniformly refined to obtain micron-sized mixed powder;

[0021] (2) Mix vanadium-titanium magnet tailings, sodium oxide, and calcium fluoride according to the ratio of (88.3-92.2): (5.4-8.3): (2.4-5.9), pre-fire in a sintering furnace at 550-670°C, and keep warm for 4 ~6 hours.

[0022] (3) Put the two mixed powders into a disc granulator for granulation at a speed of 11-25 r / min, the pelletizing agent is PVA aqueous solution, and then place it in a blast dryer at 320°C for 6-9 hours to degrease.

[0023] (4) Send the degreased powder particles into an atmosphere furnace for reduction and si...

Embodiment 1

[0026] (1) According to the ratio of 92.3:3.3:4.4, weigh the alum slag, graphite powder and calcium carbonate powder, place them in the stirring ball mill, the speed is 280 rpm, the ratio of ball to material is 3:1, ball mill for 15 hours, and carry out uniform fine grinding. Chemical treatment to obtain micron-sized mixed powder;

[0027] (2) Mix vanadium-titanium magnet tailings, sodium oxide, and calcium fluoride at a ratio of 88.6:8.3:3.1, pre-sinter in a sintering furnace at 670°C, and keep warm for 5 hours.

[0028] (3) Put the two mixed powders into a disc granulator for granulation at a speed of 19 rpm. The pelleting agent is a PVA aqueous solution, and then place them in a blast dryer at 320° C. for degreasing for 6 hours.

[0029] (4) Send the degreased powder particles into an atmosphere furnace for reduction and sintering at 890° C. for 2 hours, and finally crush and sieve to obtain the iron-titanium alloy powder material.

Embodiment 2

[0031] (1) According to the ratio of 93.5:2.1:4.4, weigh the alum slag, graphite powder and calcium carbonate powder, place them in the stirring ball mill, the speed is 350 rpm, the ratio of ball to material is 3:1, ball mill for 15 hours, and carry out uniform fine grinding. Chemical treatment to obtain micron-sized mixed powder;

[0032] (2) Mix vanadium-titanium magnet tailings, sodium oxide, and calcium fluoride at a ratio of 90.4:6.1:3.5, pre-sinter in a sintering furnace at 620°C, and keep warm for 6 hours.

[0033] (3) Put the two kinds of mixed powders into a disc granulator for granulation at a speed of 21 rpm, and the pelletizing agent is PVA aqueous solution, and then put them in a blast dryer at 320° C. for 7 hours for degreasing.

[0034] (4) Send the degreased powder particles into an atmosphere furnace for reduction and sintering at 900° C. for 4 hours, and finally crush and sieve to obtain the iron-titanium alloy powder material.

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Abstract

The invention discloses a method of preparing ferrotitanium alloy powder by adopting ferrovanadium slag and vanadium-titanium magnetite tailings. The method comprises the following steps: first, carrying out ball-milling treatment on mixed powder of ferrovanadium slag, graphite powder and calcium carbonate powder and then pre-sintering mixed powder of the vanadium-titanium magnetite tailings, sodium oxide and calcium chloride at a low temperature in a sintering furnace; granulating and degreasing the prepared two types of mixed powder; and finally, reductively sintering, crushing and screeningthe degreased powder to obtain the ferrotitanium alloy powder material finally. The method has the advantages of being high in component control precision, good in process stability and relatively high in repeatability, and high purity ferrotitanium alloy powder can be prepared.

Description

technical field [0001] The invention relates to the technical field of alloy powder preparation, in particular to a method for preparing iron-titanium alloy powder by using ferrite slag and vanadium-titanium magnet tailings. Background technique [0002] Alum slag mainly contains iron oxide, calcium oxide, alumina and other substances, and is mainly used as cement filler and concrete additive. The heavy metal ions contained in it are difficult to solidify and easily pollute water resources. Vanadium-titanium magnet tailings mainly contain silica, calcium oxide, titanium oxide, etc., and are mainly used to manufacture building materials, with low industrial added value. Therefore, it is necessary to develop new methods, change the original technical thinking, and realize the high value-added and green applications of the two kinds of tailings. [0003] Ferro-titanium alloy is a kind of iron and steel metallurgical deoxidizer, which has great industrial demand, and the cost o...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B34/12B22F9/04B22F9/22
CPCB22F9/04B22F9/22B22F2009/043C22B7/001C22B34/1218Y02P10/20
Inventor 董洪峰
Owner SHAANXI SCI TECH UNIV
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