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Slag metallurgy smelting reduction production method

A slag and reducing agent technology, applied in the field of slag metallurgical smelting reduction production, can solve the problems of low production cost, high productivity, short reaction time, etc., and achieve the effect of efficient and comprehensive utilization of resources

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

[0137] A method for slag metallurgical smelting reduction production is carried out according to the following steps:

[0138] Step 1, slag metallurgical smelting reduction:

[0139] Put the molten blast furnace slag obtained from the slag outlet into the thermal insulation slag tank with a preheating temperature of 1300°C, and add the copper smelting slag directly obtained from the smelting furnace. Air at 200°C is sprayed into coal powder with a preheating temperature of 1200°C, and 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 reduction after the slag;

[0140](a) The temperature of the reaction slag is 1300~1650°C; (b) The basicity of the reaction slag CaO / SiO 2 Ratio = 0.6 ~ 2.0; (c) The reaction slag is fully stirred; the control method is:

[0141] Corresponding to (a): the mixed slag temperature is 1550°C, within the set range; ...

Embodiment 2

[0152] A method for slag metallurgical smelting reduction production is carried out according to the following steps:

[0153] Step 1, slag metallurgical smelting reduction:

[0154] Put molten steel slag from converter steelmaking into the smelting reaction slag tank to obtain reaction slag, add ordinary iron concentrate metallized pellets with a normal temperature metallization rate of 70%, hot ordinary iron concentrate sinter, hot ordinary iron concentrate At the same time, the refractory spray gun is used to blow air with a preheating temperature of 1000°C, inject coal powder and coke powder, and heat them to a molten state. The preheating temperature of coal powder and coke powder is 800°C, and real-time monitoring Reaction slag, by controlling and ensuring the following three parameters (a), (b) and (c) at the same time, the reduced slag is obtained;

[0155] (a) The temperature of the reaction slag is 1350-1650°C; (b) The basicity of the reaction slag CaO / SiO 2 Ratio ...

Embodiment 3

[0167] A method for slag metallurgical smelting reduction production is carried out according to the following steps:

[0168] Step 1, slag metallurgical smelting reduction:

[0169] Put the molten blast furnace slag into the smelting reaction slag tank to obtain the reaction slag, add the ferronickel slag directly obtained from the smelting furnace, use a refractory spray gun, blow into the blast furnace gas in the top blowing mode, and keep it in a molten state, and monitor the reaction slag in real time Slag, through the regulation and control while ensuring the following three parameters (a), (b) and (c), the reduced slag is obtained;

[0170] (a) The temperature of the reaction slag is 1350-1650°C; (b) The basicity of the reaction slag CaO / SiO 2 Ratio = 0.6 ~ 2.0; (c) The reaction slag is fully stirred; the control method is:

[0171] Corresponding to (a): the mixed slag temperature is 1620°C, within the set range;

[0172] Corresponding to (b): After mixing, the alkal...

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Abstract

The invention discloses a slag metallurgy smelting reduction production method and belongs to the field of non-blast-furnace ironmaking and comprehensive utilization of resources. The molten state is kept by adding a reducing agent and iron-containing materials in reaction slag, and smelting reduction ironmaking is performed; the requirements of temperature, alkalinity and sufficient mixing are met in the reacting process, the slag obtained through a reaction is treated; the reduced slag can serve as a cement adding agent and a cement adjusting agent or directly serves as cement clinker; other components can also be added to produce cement clinker high in additional value, and efficient and comprehensive utilization of resources is achieved; and the method is a new smelting reduction ironmaking method. The method is short in reaction time, high in metal recycling rate, low in production cost, high in raw material adaptability, large in treatment amount, environment-friendly and high in economic benefit, is a new smelting reduction ironmaking process, and can effectively solve the metallurgy resource recycling problem.

Description

technical field [0001] The invention belongs to the fields of non-blast furnace ironmaking and resource comprehensive utilization, and in particular relates to a method for smelting reduction production of molten slag metallurgy. Background technique [0002] 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 the strong dependence on metallurgical coke. With the increasingly scarce coke resources, the price of metallurgical coke is getting higher and higher, but the abundant and cheap non-coking coal resources cannot be fully utilized in ironmaking production. And with the improvement of blast furnace intensified smelting technology, the total amount of pollutant discharge continues to increase, which is one of the main sources of domestic pollutant discharge. [0003] In order to change the difficulties faced by bla...

Claims

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Application Information

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IPC IPC(8): C21B3/06C21B3/08C21B11/00
CPCC21B3/06C21B3/08C21B11/00C21B2200/00Y02P10/20Y02W30/50
Inventor 张力张武
Owner NORTHEASTERN UNIV
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