Method for preparing reduced titanium for welding electrodes from ilmenite placer

A technology for welding electrodes and ore, which is applied in the field of reducing titanium, can solve problems such as difficult reduction, high tar content in flue gas, excessive S content in products, etc., and achieve the effect of promoting reduction speed, high overall profit, and reduced production difficulty

Active Publication Date: 2018-12-28
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, tunnel kilns or rotary kilns are mainly used for production, and there are certain deficiencies in the prior art. For example, the patent CN1362308A provides a method for reducing titanium by rotary kilns to produce welding electrodes, but this method needs to add additional lime for desulfurization. When the temperature control fluctuates, it will easily lead to many problems such as kiln knots in the kiln and excessive S content in the product; patent CN101758240A uses low-sulfur and low-phosphorus ilmenite as raw material, and controls the reduction of titanium products by adjusti

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  • Method for preparing reduced titanium for welding electrodes from ilmenite placer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] like figure 1 Shown, a kind of ilmenite placer prepares the method for reducing titanium for welding rod, comprises the following steps:

[0021] S1, the TiO2 content of ilmenite used in this case is 49%, S and P content are 0.02%, the volatile content of bituminous coal added at the kiln tail is 29%, and the proportion of particle size <5 mm is 1%, and the volatile content of coal is added at the kiln head was 34%. After mixing 2 parts of bituminous coal and 10 parts of ilmenite evenly, they are put into the rotary kiln from the kiln tail, and 1 part of coal and 0.5 parts of sodium bicarbonate are added into the kiln from the kiln head through a spray gun.

[0022] S2. By adjusting the secondary air and primary air of the kiln body, the temperature distribution of each section of the rotary kiln is controlled. The temperature of the kiln tail is 800°C, the temperature of the middle and front of the kiln is controlled between 1050-1150°C, and the temperature of the kil...

Embodiment 2

[0025] like figure 1 Shown, a kind of ilmenite placer prepares the method for reducing titanium for welding rod, comprises the following steps:

[0026] S1, the TiO2 content of ilmenite used in this case is 56%, the content of S and P is 0.03%, the volatile content of bituminous coal added at the kiln tail is 35%, and the proportion of particle size <5 mm is 2%, and the volatile content of coal added at the kiln head 37%. After mixing 4 parts of bituminous coal and 10 parts of ilmenite evenly, they are put into the rotary kiln from the kiln tail, and 3 parts of coal and 0.0 part of sodium bicarbonate are added into the kiln from the kiln head through the spray gun.

[0027] S2, by adjusting the secondary air and primary air of the kiln body, the temperature distribution of each section of the rotary kiln is controlled. The temperature at the kiln tail is 900°C, the temperature at the middle and front of the kiln is controlled between 1050-1150°C, and the temperature at the ki...

Embodiment 3

[0030] like figure 1 Shown, a kind of ilmenite placer prepares the method for reducing titanium for welding rod, comprises the following steps:

[0031] S1, the TiO2 content of ilmenite used in this case is 52%, S and P content are 0.01%, the volatile content of bituminous coal added at the kiln tail is 30%, and the proportion of particle size <5 mm is 1.5%, and the volatile content of coal is added at the kiln head 35%. After mixing 3 parts of bituminous coal and 10 parts of ilmenite evenly, they are put into the rotary kiln from the kiln tail, and 2.5 parts of coal and 0.3 parts of sodium bicarbonate are added into the kiln from the kiln head through the spray gun.

[0032] S2, by adjusting the secondary air and primary air of the kiln body, the temperature distribution of each section of the rotary kiln is controlled, in which the temperature of the kiln tail is 880°C, the temperature of the middle and front of the kiln is controlled between 1050-1150°C, and the temperatur...

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Abstract

The invention relates to a method for preparing reduced titanium for welding electrodes from ilmenite placer. The method comprises three steps of material mixing, heating reaction and cooling-separation. Compared with the prior art, ilmenite reducing speed is increased greatly, production difficulty is reduced, and reduced titanium with low FeO content can be obtained; low-sulfur reduced titaniumcan be obtained without addition of a sulfur removal agent; reactivity of ilmenite can be improved, removal speed of coal volatile matter is increased, a loose and porous structure is formed by remaining fixed carbon, and follow-up reduction is better facilitated; reactivity of raw materials is improved, a reduction reaction can be performed at lower temperature, and sintering in a kiln is avoidedeffectively; an activated carbon product with high added value can be obtained simultaneously, and overall earnings are high.

Description

technical field [0001] The invention relates to a method for preparing reduced titanium for welding electrodes from ilmenite placer, which belongs to the field of chemical metallurgy. Background technique [0002] How to reduce costs, improve economic benefits and combine my country's raw material resources is the main improvement direction of electrode formulations in recent years. Judging from the current production situation, the J422 electrode of the reduced titanium system has a great advantage. The reasons are: the natural rutile resources are increasingly scarce, titanium dioxide is easy to make the electrode coating red, increase the splash, artificial rutile consumes a lot of electricity, and the cost high. The price of reduced titanium is relatively low, and its main components are TiO2 and metallic iron, which is conducive to improving the process performance of welding rods and product quality, and has been widely used in recent years. [0003] There are relati...

Claims

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Application Information

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IPC IPC(8): C22B5/10C22B34/12C01B32/33
CPCC01B32/33C22B5/10C22B34/1218
Inventor 陈建立贺高峰李珍珍乔丽莎闫广英马丽阳
Owner CENT SOUTH UNIV
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