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Metallurgical reduction production method for titanium containing slag

A slag and reducing agent technology, applied in the field of metallurgical reduction production of titanium-containing slag, can solve the problems of high productivity, low production cost, and short reaction time

Inactive Publication Date: 2017-05-31
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has short reaction time, high productivity, low production cost, strong raw material adaptability, large processing capacity, environmental friendliness, high economic benefits, can effectively solve the problems of environmental pollution and efficient recovery and utilization of heat energy, and is a new slag metallurgy process. A new smelting reduction process is the perfection and innovation of the existing metallurgical process. It is the first time in the world to develop a slag metallurgical process. The slag is not a waste, but a metallurgical intermediate product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] A method for metallurgical reduction production of titanium-containing slag, comprising the steps of:

[0141] Step 1, slag metallurgical smelting reduction:

[0142] Put the molten vanadium-titanium-containing steel slag obtained from the slag outlet of the steel slag into the heat preservation slag tank with a preheating temperature of 1000°C, add vanadium-titanium magnetite pre-reduced pellets with a content of 60% FeO at normal temperature, and metallize Vanadium-titanium-magnetite metallized pellets and vanadium-titanium-magnetite sintered ore with a rate of 70%. At the same time, a refractory spray gun is used to blow air with a preheating temperature of 180°C in the bottom blowing mode, and the preheating temperature is 1050°C. The pulverized coal at ℃ is kept in a molten state, and the reaction slag is monitored in real time, and the following three parameters (a), (b) and (c) are guaranteed at the same time through regulation to obtain the reduced slag;

[014...

Embodiment 2

[0160] A method for metallurgical reduction production of titanium-containing slag, comprising the steps of:

[0161] Step 1, slag metallurgical smelting reduction:

[0162] Add the molten vanadium-titanium-containing steel slag from converter steelmaking into the converter to obtain reaction slag, add the metallized pellets of vanadium-titanium magnet iron ore concentrate with a hot metallization rate of 72%, and hot vanadium-titanium magnet iron ore concentrate sinter , hot vanadium-titanium magnet iron ore concentrate with FeO content of 69% and pre-reduced pellets with FeO content of 72%. powder, heated to a molten state, the preheating temperature of coal powder and coke powder is 900°C, and the reaction slag is monitored in real time. slag;

[0163] (a) The temperature of the reaction slag is between 1350 and 1650°C;

[0164] (b) Basicity of reaction slag CaO / SiO 2 Ratio = 0.6 ~ 2.0;

[0165] (c) The reaction slag is fully stirred;

[0166] The control method is: ...

Embodiment 3

[0184] A method for metallurgical reduction production of titanium-containing slag, comprising the steps of:

[0185] Step 1, slag metallurgical smelting reduction:

[0186] Add the molten vanadium-titanium-containing steel slag obtained from the steel slag outlet into the pourable reaction slag tank to form a reaction slag, add wet zinc-containing leaching slag, wet zinc smelting large kiln slag and directly from the smelting furnace At the same time, the obtained copper smelting slag is blown into the air with a preheating temperature of 150°C in the side blowing mode using a refractory spray gun, sprayed into the coke powder, heated to a molten state, and the reaction slag is monitored in real time. a), (b) and (c) three parameters, obtain the reduced slag;

[0187] (a) The temperature of the reaction slag is between 1350 and 1650°C;

[0188] (b) Basicity of reaction slag CaO / SiO 2 Ratio = 0.6 ~ 2.0;

[0189] (c) The reaction slag is fully stirred;

[0190]Correspondin...

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Abstract

The invention provides a metallurgical melting reduction production method for titanium containing slag and belongs to the field of non-blast furnace ironmaking and resource comprehensive utilization. The metallurgical melting reduction production method comprises the steps that (1) vanadium containing slag or vanadium-titanium containing steel slag is added into a melting reaction device, reducing agents are sprayed into the melting reaction device while iron containing materials and / or vanadium-titanium containing materials are sprayed into the melting reaction device with oxidizing gas, reaction mixed slag is obtained, heated to be in a molten state and monitored in real time, and the situations that the reaction slag temperature is within the set range, and the reaction slag alkalinity CaO / SiO2 ratio is 0.6-2.0 are ensured at the same time through adjustment and control, so that the reaction slag is fully mixed, and reduced and oxidized slag is obtained; and (2) separating and recycling are conducted. According to the metallurgical melting reduction production method for the titanium containing slag, the recycling rate of metallic iron is 92%-96%; heat compensation is not needed or a small quantity of heat compensation is needed; the operability is high; the production cost is low; no solid waste is produced in the whole process; the reaction conditions are mild; energy saving and emission reduction are achieved; and the metallurgical melting reduction production method is an environment-friendly metallurgical process.

Description

technical field [0001] The invention belongs to the field of non-blast furnace ironmaking and resource comprehensive utilization, and in particular relates to a method for metallurgical reduction production of titanium-containing slag. Background technique [0002] The Baiyan Obo Mine is a rare large-scale polymetallic symbiotic mine with iron, rare earth, niobium, thorium and other elements in the world. At present, the iron reserves are 1.46 billion tons, and the rare earth resources are R 2 o 3 , 135 million tons, ranking first in the world, niobium resources, Nb 2 o 5 Accounting for 95% of our country. my country adopts the process of "Baiyan Obo Iron Ore Dressing-Blast Furnace-Converter" to realize the large-scale utilization of Baiyan Obo Iron Ore. [0003] Blast furnace ironmaking is the main method of producing steel at present. After long-term development, blast furnace technology has been very mature. The disadvantage of the blast furnace ironmaking method is...

Claims

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Application Information

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IPC IPC(8): C21B3/06C21B3/08C21B11/00C04B7/147
CPCC04B7/147C21B3/06C21B3/08C21B11/00Y02P10/20Y02P40/10Y02W30/50
Inventor 张力张武
Owner NORTHEASTERN UNIV
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