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Method for reinforcing titanium concentrate pellet prereduction

A technology for ilmenite concentrate and pellets is applied in the field of strengthening the pre-reduction of ilmenite concentrate pellets, which can solve the problems of low metallization rate, etc., and achieve the effects of improving metallization rate, improving smelting furnace conditions and convenient operation.

Inactive Publication Date: 2015-09-16
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

The electric furnace of Norway TTI company smelts ilmenite pre-reduced by multi-channel rotary kiln, and obtains pellets with a certain metallization rate (metallization rate is 60% to 75%), but the metallization rate of this method is still relatively low. Low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take by weighing 10Kg of titanium concentrate of Table 1 composition, 0.3Kg of the mixture of sodium bentonite and sodium carboxymethyl cellulose (mass ratio is 1:2), 0.4Kg of water, 2Kg of carbonized coal, and press on a roller skin briquetting machine to form The speed of the ball and roller skin briquetting machine is 6r / min, and the pressure is 16MPa. After the pressed pellets are dried, the strength of the pellets is above 1000N. Select 20 pellets of this kind and place them in a resistance furnace to oxidize for 10 minutes at a temperature of 1050°C. Coat the surface of the oxidized pellets with a layer of anthracite coal powder at 1300°C. ℃ for 30 minutes, and the reduced pellets were cooled in the furnace.

[0041] The reduction rate of pellets in this embodiment can reach about 90%.

Embodiment 2

[0043] Take by weighing 10Kg of titanium concentrate of Table 1 composition, 0.3Kg of the mixture of sodium bentonite and sodium carboxymethyl cellulose (mass ratio is 1:2), 0.4Kg of water, 2Kg of carbonized coal, and press on a roller skin briquetting machine to form The speed of the ball and roller skin briquetting machine is 6r / min, and the pressure is 16MPa. After the pressed pellets are dried, the strength of the pellets is above 1000N. Select 20 pellets of this kind and place them in a resistance furnace to oxidize for 10 minutes at a temperature of 1000°C. Coat the surface of the oxidized pellets with a layer of anthracite coal powder at 1250°C. ℃ for 25 minutes, and the reduced pellets were cooled in the furnace.

[0044] The reduction rate of pellets in this embodiment can reach about 85%.

[0045] The method provided by the invention can change the phase of the titanium concentrate, effectively improve the subsequent pre-reduction metallization rate, and the pre-red...

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Abstract

The invention belongs to the field of titanium concentrate smelting titanium slag, in particular to a method for reinforcing titanium concentrate pellet prereduction. The method for reinforcing the titanium concentrate pellet prereduction solves the technical problems of low titanium concentrate pellet metallization ratio and high later smelting electricity consumption of the prior prereduction. According to a scheme for solving the technical problems, the method for reinforcing the titanium concentrate pellet prereduction includes steps that a, pellet pressing, to be specific, mixing titanium concentrate, adhesives and water for 30 minutes, and conveying to a roller sheet pellet press machine to press to form the pellet; b, pellet drying, to be specific, drying the pressed pellet for 60 minutes at 200 degrees centigrade; c, pre-oxidation, to be specific, roasting and pre-oxidizing the dry pellet for 10 to 20 minutes at 950 to 1050 degrees centigrade, wherein the pre-oxidation atmosphere is air; d, prereduction, to be specific, roasting and pre-reducing for 25 to 30 minutes at 1250 to 1350 degrees centigrade after uniformly mixing the oxidized and roasted pellet with pulverized coal under nitrogen protection. The method for reinforcing the titanium concentrate pellet prereduction realizes the fine grained titanium concentrate use of Panzhihua, effectively lowers the later smelting electricity consumption and improves the smelting furnace conditions; devices needed for the method are broad in source, and the operation is convenient to perform.

Description

technical field [0001] The invention belongs to the field of smelting titanium slag from titanium concentrate, and in particular relates to a method for strengthening the pre-reduction of titanium concentrate pellets. Background technique [0002] my country's Panxi region is rich in vanadium-titanium magnetite rock ore, accounting for 90.5% of the country's proven reserves and 35% of the world. Although my country's Panxi region is rich in titanium resources, there are low-grade titanium ores, all of which are polymetallic symbiotic ores, with high calcium and magnesium impurities and fine particle sizes. If this kind of ore is directly smelted in the furnace, it may cause a series of problems such as slag dumping during the smelting process, severe foamy slag, long smelting cycle, high power consumption for smelting, and difficulty in separating slag and iron. [0003] The production process of solid-phase reduction of titanium concentrate pellets in a device other than t...

Claims

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Application Information

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IPC IPC(8): C22B1/242C22B1/02
Inventor 刘娟肖军李凯茂赵青娥韩可喜缪辉俊张继东
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP