A kind of decarburization smelting method of iron-nickel alloy recycled material

A technology of iron-nickel alloy and smelting method, which is applied in the field of decarburization and smelting of iron-nickel alloy recycled materials, which can solve the problems of clean technology, environmental pollution, high cost, metal oxidation, etc., and achieve reasonable process design, low cost, and loss of metal elements low effect

Active Publication Date: 2020-05-26
BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a decarburization smelting method for iron-nickel alloy recycled materials, which solves the problems of environmental pollution, high cost and metal oxidation in the existing cleaning technology of iron-nickel alloy recycled materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] Example 1: A 2T non-vacuum induction furnace was used to smelt 2.1 tons of expanded alloy 4J42 recycled materials.

[0031] The upper limits of mass percentage of silicon and manganese elements in 4J42 alloy recycled materials are 0.2% and 0.5% respectively.

[0032] Take 10.012Kg samples immediately from this batch of iron-nickel alloy reclaimed materials to be smelted, use organic solvent to clean and dry, weigh the remaining alloy weight to be 9.898Kg, calculate and get this batch of reclaimed materials covered with oil mass percent=(10.012- 9.898) / 10.012 = 1.14%.

[0033] 100Kg of iron oxide scale produced in the forging process was crushed to -200 mesh to 1 mesh, and baked in a heating furnace at 300°C for 8 hours.

[0034] Weigh 100g of the pretreated iron oxide scale, and use the chemical analysis method to detect that the mass percentage of oxygen in the iron oxide scale is 24.3%.

[0035] Weigh 50Kg of the pretreated iron oxide scale, and the calculation form...

example 2

[0044] Example 2: Using a 3T non-vacuum induction furnace to melt 3.2 tons of soft magnetic alloy 1J77 recycled materials.

[0045] The upper limits of mass percentage of silicon and manganese elements in 1J77 alloy recycled materials are 0.3% and 0.6% respectively.

[0046] Take 10.017Kg samples immediately from this batch of iron-nickel alloy reclaimed materials to be smelted, use organic solvent to clean and dry, weigh the remaining alloy weight to be 9.742Kg, calculate and get this batch of reclaimed materials covered with oil mass percentage=(10.017- 9.742) / 10.017 = 2.75%;

[0047] Break 100Kg of iron oxide scale produced in the forging process to -200 mesh to 1 mesh, and bake it in a heating furnace at 300°C for 8 hours;

[0048] Weigh 100g of the pretreated iron oxide scale, and use the chemical analysis method to detect that the mass percentage of oxygen in the iron oxide scale is 26.5%.

[0049] Weigh 60Kg of the pretreated iron oxide scale, and the calculation form...

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Abstract

The invention relates to a decarburization and smelting method for an iron-nickel alloy reclaimed material, which belongs to the technical field of iron-nickel alloy refining. An organic solvent is used for sampling the oil percentage of the iron-nickel alloy reclaimed material, and the oxidized scale which is crushed, screened, baked and tested for oxygen content is used as a decarburizing agent,the pre-treated iron oxidized scale is subjected to oxygen content determination by a chemical analysis method, a non-vacuum induction furnace is used for melting, the oxidized scale is added after the furnace charge is completely melted, and the decarburization smelting is completed after the disappearance of an oxidized scale slag layer and continued for 5 to 8 minutes. The method has advantages that the smelting process is reasonable in design and easy to operate, the environment pollution is extremely small, and the loss of metal elements is extremely low. The decarburization agent has large output and low price, has remarkable decarburization effect, can be adapted to large-scale industrial production, and can realize recycling of the iron-nickel alloy reclaimed material economically, efficiently and environmentally.

Description

technical field [0001] The invention belongs to the technical field of iron-nickel alloy refining, and relates to a method for decarburization and smelting of iron-nickel alloy reclaimed material. Iron oxide scale is used as a decarburizing agent, and a non-vacuum induction furnace is used to decarburize and smelt the reclaimed iron-nickel alloy material. Background technique [0002] Iron-nickel alloys are often used to make metal functional materials, including soft magnetic alloys, expansion alloys, etc., and are widely used in aerospace, electronic appliances and other fields. my country needs about 20,000 tons of iron-nickel alloys every year, with an annual output value of nearly three billion yuan. The finished iron-nickel alloy needs to be coated with lubricating oil during use, and about 4,000 tons of oil-coated recycled materials will be produced every year. Smelting and casting recycled materials to form recycled materials is a necessary way to improve the utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/068
CPCC21C7/068Y02P10/20
Inventor 彭劼郭文东李崇巍刘海稳任福全
Owner BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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