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A method for producing stainless steel raw materials by melting and reduction of hot copper slag under the action of nickel-containing materials

A stainless steel and copper slag technology, applied in the fields of resources and environment, can solve the problems of rising prices of high-quality iron ore, low grades, increased iron and steelmaking costs, etc., and achieves low furnace maintenance costs, shortened technological processes, and reduced production costs. Effect

Active Publication Date: 2016-01-13
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the growth rate of iron ore production in my country is far lower than the growth rate of steel production capacity, and domestic iron ore resources have the defects of more lean ore, less rich ore, more complex iron ore associated with multiple metals, shortage of iron ore resources, and low grade. The demand for iron ore is increasing year by year, the dependence on imports is high, and the price of high-quality iron ore is rising. This has led to an increasingly prominent contradiction in the shortage of raw materials for the production of my country's iron and steel industry. The rapid development of my country's iron and steel industry

Method used

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  • A method for producing stainless steel raw materials by melting and reduction of hot copper slag under the action of nickel-containing materials
  • A method for producing stainless steel raw materials by melting and reduction of hot copper slag under the action of nickel-containing materials

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Embodiment 1

[0026] Such as figure 1 As shown, the method for producing stainless steel raw materials by smelting reduction of hot copper slag under the action of the nickel-containing material, its specific steps are as follows:

[0027] When the nickel-containing material is ferronickel concentrate, the high-temperature hot copper slag just out of the furnace (the temperature of the high-temperature hot copper slag is 1250°C, and the copper slag includes the following components by mass percentage: TFe33.04%, CaO1.24%, MgO0.89%, SiO 2 30.56%, S0.37%) to the electric furnace, and then add slagging agent (CaO) with a particle size of 0.15mm and nickel-iron concentrate (the mass percentage of nickel is 20%, and the mass percentage of iron is 20%) to obtain a molten mixture, inject reducing agent (coal) into the furnace and inject inert gas into the molten mixture at the same time, and the amount of slagging agent added is determined according to the alkalinity of the molten mixture, and th...

Embodiment 2

[0032] Such as figure 1 As shown, the method for producing stainless steel raw materials by smelting reduction of hot copper slag under the action of the nickel-containing material, its specific steps are as follows:

[0033]When the nickel-containing material is ferronickel concentrate, the high-temperature hot copper slag just out of the furnace (the temperature of the high-temperature hot copper slag is 1300°C, and the copper slag includes the following components by mass percentage: TFe42.07%, CaO3.42%, MgO1.57%, SiO 2 38.07%, S0.55%) to the converter, and then add a slagging agent (a mixture of CaO and MgO) with a particle size of 0.45mm and a nickel-containing material nickel-iron concentrate (the mass percentage of nickel in the nickel-iron concentrate is 30%, the mass percentage of iron is 50%) to obtain a molten mixture, inject reducing agent (coke) into the furnace and inject inert gas into the molten mixture at the same time, and the amount of slagging agent added ...

Embodiment 3

[0038] Such as figure 1 As shown, the method for producing stainless steel raw materials by smelting reduction of hot copper slag under the action of the nickel-containing material, its specific steps are as follows:

[0039] When the nickel-containing material is ferronickel concentrate, the high-temperature hot copper slag just out of the furnace (the temperature of the high-temperature hot copper slag is 1280°C, and the copper slag includes the following components by mass percentage: TFe40.06%, CaO2.86%, MgO1.28%, SiO 2 35.62%, S0.48%. ) to the electric furnace, and then add a slagging agent (a mixture of CaO and MgO) with a particle size of 0.30mm and nickel-iron concentrate (the mass percentage of nickel is 25%, and the mass percentage of iron is 40%) into the electric furnace to obtain To melt the mixture, inject reducing agent (activated carbon) into the furnace and inject inert gas into the molten mixture at the same time, wherein the amount of slagging agent added ...

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Abstract

The invention relates to a method for preparing stainless steel raw materials through smelting reduction of hot copper slags under action of nickel-containing materials and belongs to the technical field of resource and environment. When the nickel-containing materials are ferro-nickel concentrates, fresh high-temperature hot copper slags out from a furnace, slag formers and the nickel-containing material ferro-nickel concentrates are reacted and high-temperature molten iron and furnace slags are obtained, finally, after the high-temperature molten iron is subjected to desulfuration and dephosphorization treatments, alloying is carried out and stainless steel raw materials can be prepared. When the nickel-containing materials are ferro-nickel alloys, fresh high-temperature hot copper slags out from a furnace and slag formers are reacted and high-temperature molten iron and furnace slags are obtained, finally, after the high-temperature molten iron is subjected to desulfuration and dephosphorization treatments, qualified molten steel is obtained, the ferro-nickel alloys are added into the qualified molten steel, alloying is carried out and stainless steel raw materials can be prepared. The method achieves comprehensive utilization of copper, nickel and iron resources, shortens smelting technology processes of stainless steel, and lowers energy consumption and production cost.

Description

technical field [0001] The invention relates to a method for producing stainless steel raw materials by smelting reduction of hot copper slag under the action of nickel-containing materials, and belongs to the technical field of resources and environment. Background technique [0002] In recent years, my country's iron and steel industry has developed rapidly and has ranked first in the world's output for many years. However, the growth rate of iron ore production in my country is far lower than the growth rate of steel production capacity, and domestic iron ore resources have the defects of more lean ore, less rich ore, more complex iron ore associated with multiple metals, shortage of iron ore resources, and low grade. The demand for iron ore is increasing year by year, the dependence on imports is high, and the price of high-quality iron ore is rising. This has led to an increasingly prominent contradiction in the shortage of raw materials for the production of my country'...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C21B13/00
Inventor 王华邱在军李磊廖彬胡建杭魏永刚
Owner KUNMING UNIV OF SCI & TECH