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Manufacturing method of nickel-iron alloy

A nickel-iron alloy and a manufacturing method technology, applied in the field of metallurgy, can solve the problems of low production efficiency, high energy consumption, long reduction time, etc., and achieve the effects of less dust, low energy consumption, and short reduction time

Inactive Publication Date: 2016-02-10
匡永刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the blast furnace reduction and shaft furnace reduction-electric furnace smelting-refining method to reduce nickel oxide ore has problems such as long reduction time, low production efficiency, scarce coke as fuel, and the need for sinter (or oxidized pellets). Direct electric furnace The smelting-refining method still has problems such as high energy consumption and low production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In 1 ton of nickel oxide-containing raw materials (the composition is TFe26.0% by weight percentage, Ni1.88%, SiO2

[0026] 28.46%, CaO2.02%, MgO12.12%, Al2O35.69%, P<0.005%, S0.094%, the rest is water), add coal powder 30kg, binder PVA2.06kg and limestone, limestone consumption according to The basicity of the mixture CaO / SiO2 is prepared at 0.6, and the particle size of coal powder and limestone is less than 5mm. The aforementioned 4 kinds of raw materials are mixed with water to form a mixture so that the water content is 7.8% of the weight of the mixture, and after uniform stirring, the pellets are pressed into pellets with a diameter of 30mm by a pressure molding machine. The pellets are sent into a rotary hearth furnace for reduction, the temperature of the rotary hearth furnace is controlled at 1300-1350° C., and the reduction time is 40 minutes to obtain metallized pellets. Then an electric arc furnace is used to melt and separate the metallized pellets, the me...

Embodiment 2

[0029] Add coal powder 50kg, binding agent PVA31.5kg and fluorite in 1 ton of nickel oxide-containing raw material (ingredients are the same as embodiment 1), the fluorite consumption is according to the basicity of the mixture CaO / SiO It is 0.9 preparation, coal powder, fluorite Particle size <5mm. The aforementioned 4 kinds of raw materials are mixed with water to make a mixture so that the water content is 7.2% of the weight of the mixture, and after uniform stirring, the pellets with a diameter of 30mm are pressed by a pressure forming machine. The pellets are sent to a rotary kiln for reduction, the temperature of the rotary kiln is controlled at 1100-1200°C, and the reduction time is 240 minutes to obtain metallized pellets. Then use a submerged arc furnace to melt and separate and deeply reduce the metallized pellets. The melting and separation temperature is 1550 ° C, and the iron slag is removed to obtain a coarse nickel-iron alloy. Crude nickel-iron alloy is sent to...

Embodiment 3

[0031] In 1 ton of nickel oxide-containing raw material (composition is TFe24.0% by weight percentage, Ni1.98%, SiO2

[0032] 25.6%, CaO2.22%, MgO14.12%, Al2O34.9%, P<0.006%, S0.088%, the rest is water), add coal powder 100kg, PVA8.8kg and limestone, limestone consumption according to the mixture alkali The degree of CaO / SiO2 is 1.2, and the particle size of coal powder and flux is <5mm. The aforementioned 4 kinds of raw materials are mixed with water to form a mixture so that the water content is 7.1% of the weight of the mixture, and after being stirred evenly, pressure molding is used to form pellets with a diameter of 40 mm. The pellets are sent into a rotary hearth furnace for reduction, the temperature of the rotary hearth furnace is controlled at 1300-1350° C., and the reduction time is 35 minutes to obtain metallized pellets. Then use an electric arc furnace to melt and separate and deeply reduce the metallized pellets. The melting and separation temperature is 1650 °...

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Abstract

The invention belongs to the technical field of metallurgy, and especially relates to a manufacturing method of a nickel-iron alloy. The invention aims to provide a nickel-iron alloy manufacturing method, which has the advantages of high production efficiency, short flow, low energy consumption, and difficulty in clotting of furnace charge, and takes common coal as the reducing agent. The manufacturing method comprises the following steps: step A, mixing nickel oxide, coal powder, and flux, and pressing the mixture into pellets; step B, reducing the pellets to obtain metalized pellets; step C, melting the metalized pellets to obtain coarse nickel-iron alloy; step D, refining the coarse nickel-iron alloy to obtain refined nickel-iron alloy. According to the preparation method, coal powder is added into the raw materials to produce pellets directly, the reaction surface is enlarged, the dynamic conditions are improved, and the reduction reaction is promoted. Furthermore, the reduction time is short, the energy consumption is low, the pellet-shaped furnace charge will not adhere on the furnace lining, the dust is little, and the recovery rate of useful elements is high.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a method for manufacturing a nickel-iron alloy. Background technique [0002] The traditional nickel-iron alloy production method is to use pyrometallurgy to smelt nickel oxide ore. According to different reduction processes, it can be divided into: blast furnace reduction and shaft furnace reduction-electric furnace smelting-refining method, direct electric furnace smelting-refining method, and patents CN1306049C and CN1300352C also propose The blast furnace method, etc. However, the blast furnace reduction and shaft furnace reduction-electric furnace smelting-refining method to reduce nickel oxide ore has problems such as long reduction time, low production efficiency, scarce coke as fuel, and the need for sinter (or oxidized pellets). Direct electric furnace The smelting-refining method also has problems such as high energy consumption and low production efficiency. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C38/08C22C19/03C22C1/02C22C1/06
Inventor 匡永刚
Owner 匡永刚
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