Smelting reduction production and thermal refining method for titanium-containing slag mixture

A quenching and tempering treatment and slag technology, which is applied in the field of smelting reduction production and quenching and tempering treatment of titanium-containing mixed slag, can solve the problems of low production cost, high metal recovery rate, short reaction time, etc., and achieve the effect of efficient recovery

Active Publication Date: 2016-10-26
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention has short reaction time, high metal recovery rate, low production cost, strong raw material adaptability, large processing capacity, environmental friend

Method used

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  • Smelting reduction production and thermal refining method for titanium-containing slag mixture

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Effect test

Embodiment 1

[0147] A method for smelting reduction production and quenching and tempering treatment of titanium-containing mixed slag, specifically comprising the following steps:

[0148] Step 1, smelting reduction:

[0149] (1) Material mixing and melting:

[0150] The liquid molten titanium-containing blast furnace slag and converter vanadium-titanium molten steel slag flowing out of the slag outlet are added to the thermal insulation pit whose inner layer is graphite-dolomite composite thermal insulation refractory material to form titanium-containing mixed slag, which is added to the titanium-containing mixed molten slag. Coal powder, vanadium-containing titanium steel slag and ordinary iron concentrate metallized pellets are added to the slag to form a mixed slag. The temperature is raised to 1500°C, and the mixed slag is heated to a molten state for smelting reduction, and the two parameters (a) and (b) are guaranteed at the same time through regulation:

[0151] (a) The temperat...

Embodiment 2

[0172] A method for smelting reduction production and quenching and tempering treatment of titanium-containing mixed slag, specifically comprising the following steps:

[0173] Step 1, smelting reduction:

[0174] (1) Material mixing and melting:

[0175] The liquid molten titanium-containing blast furnace slag and converter vanadium-titanium molten steel slag flowing out of the slag outlet are added to the pourable thermal insulation slag tank of graphite-silicon composite thermal insulation refractory material to form titanium-containing mixed slag, and the titanium-containing mixed slag Add coke powder and fluorite to form a mixed slag. The temperature of the mixed slag is 1410°C when mixing. Use a refractory spray gun to insert the slag and blow into the coal powder, and add vanadium-containing titanium molten steel slag to increase the temperature of the mixed slag. To 1480°C, the mixed slag is heated to a molten state for smelting reduction, and the two parameters (a) a...

Embodiment 3

[0199] A method for smelting reduction production and quenching and tempering treatment of titanium-containing mixed slag, specifically comprising the following steps:

[0200] Step 1, smelting reduction:

[0201] (1) Material mixing and melting:

[0202] Add the liquid molten titanium-containing blast furnace slag and converter vanadium-titanium molten steel slag flowing out of the slag outlet into the converter whose inner layer is pitch-magnesium composite thermal insulation refractory material to form titanium-containing mixed slag, and add titanium-containing mixed slag Bituminous coal, ordinary iron concentrate, and ordinary iron concentrate directly reduce iron to form a mixed slag. The temperature of the mixed slag is 1460°C when mixing, and the refractory spray gun is inserted into the slag and blown into coal powder, and the mixed slag is heated to 1500°C , the mixed slag is heated to a molten state for smelting reduction, and the two parameters (a) and (b) are guar...

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Abstract

The invention provides a smelting reduction production and thermal refining method for a titanium-containing slag mixture. The smelting reduction production and thermal refining method for the titanium-containing slag mixture comprises the following steps of (1) adding a reduction agent, a vanadium-titanium-containing mineral and/or an iron-containing material into the titanium-containing slag mixture and performing heating to a set temperature to enable the slag mixture to be in a molten condition, and then injecting oxidative gas for smelting reduction and oxidation, and controlling the temperature range of the slag mixture and the alkalinity ratio range of CaO/SiO<2>; and (2) performing separation and recovery according to different reaction devices. According to the method, the titanium component, the iron component, the vanadium component, the phosphorus component and the free calcium oxide component in the slag mixture can be recycled efficiently; solid-state materials containing vanadium, titanium and iron can be processed massively by using a smelting reduction ironmaking technology for the production of high-grade titanium slag and vanadium-enriched slag, and at the same time the method is the novel smelting reduction ironmaking technology which is capable of realizing thermal refining of the slag and efficient and comprehensive utilization of resources. The method is short in reaction time, high in metal recovery rate, low in production cost, strong in raw material adaptability, large in processing capacity and capable of solving the problem of efficient recovery and use of multi-metal complex ore metallurgical resources and heat energy effectively.

Description

technical field [0001] The invention belongs to the field of non-blast furnace ironmaking and resource comprehensive utilization, and specifically relates to a method for smelting reduction production and quenching and tempering treatment of titanium-containing mixed slag. Background technique [0002] In today's world, the production of blast furnace ironmaking is developing unprecedentedly, the scale of blast furnace is expanding continuously, the production consumption of blast furnace is decreasing, and the cost is lowered. It is still the main force of steel production. Production encountered huge challenges, the details are as follows: [0003] (1) Blast furnace has a long production process from raw material pretreatment, pelletizing plant, sintering plant, coking plant, and blast furnace ironmaking, and the total investment is very huge; [0004] (2) Strong dependence on metallurgical coke. With the increasingly scarce coking coal resources, the price of metallurgi...

Claims

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Application Information

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IPC IPC(8): C21B3/06C21B11/00C22B7/04C22B34/12C22B34/22
CPCC21B3/06C21B11/00C22B7/001C22B7/04C22B34/1222C22B34/1227C22B34/22Y02P10/20Y02W30/50
Inventor 张力张武
Owner NORTHEASTERN UNIV
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