Method for recycling of nickel-based alloy solid waste materials

Abstract

The present application relates to nickel-based alloy solid waste secondary recycling and reusing process technical field, provide a kind of nickel-based alloy solid waste resource recycling method, the moisture and oil stain in nickel-based alloy solid waste are removed by roasting method, prevent smelting process increases H, O;By and lime together smelting mode, make the P, Si, Al, S and inclusion in molten steel in nickel-based alloy solid waste of nickel-based alloy formation enter slag, effectively remove P, Si, Al, S and inclusion in molten steel;By carrying out AOD oxygen blowing decarburization treatment and deoxidation treatment, reduce carbon and oxygen content, and simultaneously reduce the content of P, Si, Al and S;Finally after pouring, obtain nickel-based alloy smelting raw material. Experimental results show that, using the recycling method provided by the present application, nickel-based alloy solid waste can be converted into a kind of low C, P, Si, S of Ni, Cr, Co, Mo containing alloy steel ingot.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of secondary recycling and reusing of nickel-based alloy solid waste, and particularly relates to a method for recycling and reusing nickel-based alloy solid waste. BACKGROUND

[0002] In recent years, with the wide application of high-temperature nickel-based alloys in aerospace, petrochemical industry, military industry and other industries, the demand for nickel-based alloys is increasing year by year. During the production and processing of nickel-based alloy blanks and products, certain polishing and turning treatments are required, which will generate a large amount of grinding and powder. These grinding and powder materials contain a large amount of expensive alloy elements such as Ni, Cr, Co, Mo and W, and are mixed with a large amount of grinding wheel dust, oxide scale and other impurities. If these waste materials cannot be effectively and reasonably utilized, it will cause great waste of metal resources and cause certain environmental pollution.

[0003] Due to the large number of types of nickel-based alloys, the grinding and powder materials generated during polishing contain a large number of metal elements. At present, the treatment of this waste material mainly includes wet leaching and other processes for purification. However, this method can only purify one or two elements, and other elements are wasted as waste. In addition, the wet extraction process is long and the production process is complex. On the other hand, high-temperature alloys have high hardness and strong corrosion resistance, and the content of Al and Cr is high. When most high-temperature alloys are dissolved in strong oxidizing acid, a dense passivation film is easily formed on the surface of the alloy, thereby reducing the dissolution rate of the high-temperature alloy and affecting the recovery efficiency of the alloy.

[0004] Therefore, there is an urgent need to provide a method for recycling and reusing nickel-based alloy solid waste, which can simultaneously recover multiple elements and has high yield. SUMMARY

[0005] The purpose of the present application is to provide a method for recycling and reusing nickel-based alloy solid waste. The method provided by the present application can obtain a low-C, P, Si and S alloy steel ingot containing Ni, Cr, Co and Mo, and the final recovery rate of alloy elements is greater than or equal to 70%, and the steel ingot can meet the requirements of raw materials for vacuum smelting of nickel-based alloys.

[0006] In order to achieve the above-mentioned purpose of the application, the present application provides the following technical solutions:

[0007] The present application provides a method for recycling and reusing nickel-based alloy solid waste, comprising the following steps:

[0008] (1) baking nickel-based alloy solid waste to obtain baked pretreated material;

[0009] (2) adding lime and the baked pretreated material obtained in step (1) into a smelting furnace in sequence, smelting, and tapping to obtain smelted material;

[0010] (3) sequentially adding lime and the smelting material obtained in step (2) into an AOD converter, and sequentially performing AOD oxygen decarburization treatment and deoxidation treatment to obtain a purified material;

[0011] (4) pouring the purified material obtained in step (3) to obtain a nickel-based alloy smelting raw material.

[0012] Preferably, the nickel-based alloy solid waste material in step (1) is composed of nickel-based alloy scrap and grinding wheel dust; the grinding wheel dust accounts for 1 / 4 of the total weight of the nickel-based alloy solid waste material; the nickel-based alloy scrap, in terms of mass percentage, comprises the following components: Ni: 38-42%, Cr: 13-17%, Mo: 1-3%, Co: 0.5-1.5%, and the balance Fe.

[0013] Preferably, the temperature of the roasting in step (1) is 500-700°C, and the roasting time is 8-10h.

[0014] Preferably, the amount of lime used in step (2) is 1-3% of the weight of the nickel-based alloy scrap in the roasting pretreated material.

[0015] Preferably, in the smelting process of step (2), a slagging agent such as lime and / or fluorite is supplemented, and a reducing agent such as FeSi powder is added.

[0016] Preferably, the temperature of the smelting in step (2) is 1550-1650°C.

[0017] Preferably, the temperature of the tapping in step (2) is 1630-1680°C.

[0018] Preferably, the AOD oxygen decarburization treatment in step (3) includes three-step blowing, and the process of the three-step blowing is as follows: first-step blowing Ar:O2=1:4, the blowing time is calculated according to the carbon content, after the first-step blowing, sampling and temperature measurement are performed, and the temperature is 1650-1660°C; second-step blowing Ar:O2=1:1, the blowing time is calculated according to the carbon content, after the second-step blowing, sampling and temperature measurement are performed, and the temperature is 1680-1690°C; third-step blowing Ar:O2=3:1, the blowing time is calculated according to the carbon content, after the third-step blowing, sampling and temperature measurement are performed, and the temperature is 1700-1710°C; wherein, in the process of the three-step blowing, Ar and O2 are both volume ratios; the carbon content refers to the mass content of carbon in the AOD oxygen decarburization treated material.

[0019] Preferably, the carbon contents to be reached in the first blowing, the second blowing and the third blowing are ≤0.25%, ≤0.15% and ≤0.02%, respectively.

[0020] Preferably, the oxidation treatment in step (3) includes simultaneous slagging and deoxidation operations.

[0021] The application provides a method for recycling nickel-based alloy solid waste, comprising the following steps: baking the nickel-based alloy solid waste to obtain baked pretreated material; adding lime and the baked pretreated material into a smelting furnace in sequence to smelt, and tapping to obtain smelted material; adding lime and the smelted material into an AOD refining furnace in sequence to sequentially perform AOD oxygen blowing decarburization treatment and deoxidation treatment, and obtaining purified material; and pouring the purified material to obtain nickel-based alloy smelting raw material. The application removes moisture and oil stains in the nickel-based alloy solid waste by baking, thereby preventing the increase of H and O in the smelting process; the P, Si, Al and S elements and inclusions in the molten steel formed by the nickel-based alloy cutting material enter the slag by smelting with lime, thereby effectively removing P, Si, Al and S and inclusions in the molten steel; the carbon content and oxygen content in the material are further reduced by performing AOD oxygen blowing decarburization treatment and deoxidation treatment, and the contents of P, Si, Al and S are also reduced; and finally, the nickel-based alloy smelting raw material is obtained by pouring. Experimental results show that the method provided by the application can convert the nickel-based alloy solid waste into an alloy steel ingot containing Ni, Cr, Co and Mo with low C, P, Si and S, and the final recovery rate of alloy elements is greater than or equal to 70%, and the steel ingot can meet the requirements of raw materials for nickel-based alloy vacuum smelting in the later stage. DETAILED DESCRIPTION

[0022] The application provides a method for recycling nickel-based alloy solid waste, comprising the following steps:

[0023] (1) baking the nickel-based alloy solid waste to obtain baked pretreated material;

[0024] (2) adding lime and the baked pretreated material obtained in step (1) into a smelting furnace in sequence to smelt, and tapping to obtain smelted material;

[0025] (3) adding lime and the smelted material obtained in step (2) into an AOD refining furnace in sequence to sequentially perform AOD oxygen blowing decarburization treatment and deoxidation treatment, and obtaining purified material;

[0026] (4) pouring the purified material obtained in step (3) to obtain nickel-based alloy smelting raw material.

[0027] In the application, the lime is lime with a CaO content greater than 90wt%, the fluorite is fluorite with a CaF2 content greater than 90wt%, the FeSi powder is FeSi powder with a Si content of 72wt%, and the Ca-Si powder is Ca-Si powder with a Si content of 50-60wt%.

[0028] The nickel-based alloy solid waste is baked to obtain a baked pretreated material.

[0029] In the present application, the nickel-based alloy solid waste is preferably composed of nickel-based alloy scrap and grinding wheel dust; the grinding wheel dust preferably accounts for 1 / 4 of the total weight of the nickel-based alloy solid waste. In the present application, the nickel-based alloy scrap preferably includes the following components: Ni: 38-42%, Cr: 13-17%, Mo: 1-3%, Co: 0.5-1.5%, and the balance of Fe.

[0030] In the present application, the baking temperature is preferably 500-700°C, and more preferably 600-700°C; the baking time is preferably 8-10h, and more preferably 8-9h.

[0031] After obtaining the baked pretreated material, lime and the baked pretreated material are sequentially added to a smelting furnace to obtain a smelted material.

[0032] In the present application, the amount of lime is preferably 1-3% of the weight of the nickel-based alloy scrap in the baked pretreated material, and more preferably 2%. In the present application, the lime is the main slagging agent in the smelting process.

[0033] In the present application, the smelting temperature is preferably 1550-1650°C.

[0034] In the present application, the slagging agent lime and / or fluorite is preferably added during the smelting process, and the reducing agent FeSi powder is added. The present application does not have special provisions for the amount of lime and fluorite added, and the conventional addition can be added according to the slagging condition. In the present application, the new slag is formed by adding lime and / or fluorite, and a large amount of impurities in the molten steel is removed by multiple slagging. In the present application, the amount ratio of the reducing agent FeSi powder and the roasted pretreated nickel-based alloy scrap is preferably 2-5 kg / t, and more preferably 3-5 kg / t. In the present application, by adding FeSi powder during the smelting process, deoxidation and improvement of Cr recovery rate can be realized.

[0035] In the present application, the Al block and the roasted pretreated nickel-based alloy scrap are added before tapping, and then the smelting material is obtained by tapping.

[0036] In the present application, the amount ratio of the Al block and the roasted pretreated nickel-based alloy scrap is preferably 1-2 kg / t, and more preferably 1.5-2 kg / t. The present application does not have special provisions for the specification of the Al block, and the conventional selection can be selected. In the present application, the Al block is used as a deoxidizing and nitrogen-fixing agent during smelting, and the oxidation resistance of the steel is improved.

[0037] In the present application, the temperature of the tapping is preferably 1630-1680℃, and more preferably 1640-1670℃. In the present application, the composition of the material after smelting is preferably: C content 0.30-0.50wt%, Si content ≤0.20wt%.

[0038] After obtaining the smelting material, lime and the smelting material are sequentially added to the AOD refining furnace in the present application, and then AOD oxygen blowing decarburization treatment and deoxidation treatment are sequentially carried out to obtain a purified material.

[0039] In the present application, the amount of lime is preferably 1-3wt% of the smelting material, and more preferably 2wt%. In the present application, a certain amount of lime is added during the AOD oxygen blowing decarburization treatment, in order to further remove P, Si, Al and S and inclusions in the smelting material.

[0040] In the present application, the AOD oxygen blowing decarburization treatment preferably includes three-step blowing. In the present application, the process of the three-step blowing is preferably: first-step blowing Ar:O2=1:4, the blowing time is calculated according to the carbon content, the first-step blowing is ended, sampling and temperature measurement, the temperature is 1650-1660℃; second-step blowing Ar:O2=1:1, the blowing time is calculated according to the carbon content, the second-step blowing is ended, sampling and temperature measurement, the temperature is 1680-1690℃; third-step blowing Ar:O2=3:1, the blowing time is calculated according to the carbon content, the third-step blowing is ended, sampling and temperature measurement, the temperature is 1700-1710℃; wherein, the Ar and O2 in the process of the three-step blowing are volume ratio; the carbon content refers to the mass content of carbon in the AOD oxygen blowing decarburization treatment material.

[0041] The present application does not have special provisions for the calculation method of the blowing time according to the carbon content, and the calculation can be performed according to the calculation method well known to those skilled in the art. In the present application, the carbon content after the first step of blowing is preferably ≤0.25wt%. In the present application, the carbon content after the second step of blowing is preferably ≤0.15wt%. In the present application, the carbon content after the third step of blowing is preferably ≤0.02wt%.

[0042] In the present application, the oxidation treatment preferably includes simultaneous deslagging and deoxidation operations.

[0043] In the present application, the deslagging agent is preferably lime and fluorite. In the present application, the ratio of the amount of lime to the smelting material is preferably 10-15kg / t, and more preferably 10-13kg / t. In the present application, the ratio of the amount of fluorite to the smelting material is preferably 2-3kg / t, and more preferably 2.5-3kg / t. The present application further removes impurities in the AOD oxygen blowing decarburization treated material by adding lime and fluorite to form new slag.

[0044] In the present application, the deoxidizer is FeSi powder and Ca-Si powder. In the present application, the ratio of the amount of FeSi powder to the smelting material is preferably 140-160kg / t, and more preferably 150kg / t. The present application can achieve deoxidation and improve Cr recovery rate by adding FeSi powder to the AOD oxygen blowing decarburization treated material. In the present application, the ratio of the amount of Ca-Si powder to the smelting material is preferably 1-2kg / t, and more preferably 1.5-2kg / t. The present application can achieve further deoxidation by adding FeSi powder and Ca-Si powder to the AOD oxygen blowing decarburization treated material. Si combines with O to enter the slag, and the amount of addition is controlled to ensure that the composition does not exceed the technical requirement range.

[0045] After obtaining the purified material, the present application pours the purified material to obtain a nickel-based alloy smelting raw material.

[0046] In the present application, the pouring temperature is preferably 1500-1540℃, and more preferably 1500-1530℃. The present application obtains a nickel-based alloy smelting raw material solid by casting.

[0047] In the present application, after the casting is completed, the product after the casting is preferably further cut into a nickel-based alloy smelting raw material of a required size according to the required size. The present application does not have special provisions for the cutting method, and the product after the casting can be cut into a nickel-based alloy smelting raw material of a required size according to the cutting method well known to those skilled in the art.

[0048] The technical solutions in the present application will be described clearly and completely below in combination with the embodiments in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0049] The melting temperature T of PEBA4533 SA01 involved in the examples and comparative examples m is 150℃.

[0050] Example 1

[0051] A method for recycling nickel-based alloy solid waste, comprising the following steps:

[0052] The nickel-based alloy solid waste is composed of nickel-based alloy cutting material and grinding wheel ash powder; wherein the grinding wheel ash powder accounts for 1 / 4 of the total weight of the nickel-based alloy solid waste;

[0053] The nickel-based alloy cutting material, in terms of mass percentage, is composed of Ni: 40%, Cr: 15%, Mo: 2%, Co: 1% and the balance of Fe;

[0054] The main components of the grinding wheel ash powder are SiO2, Al2O3 and SiC (without specific content determination)

[0055] It is required that C≤0.03%, Si≤0.3%, P≤0.03%, S≤0.01%, and Ni, Cr, Co, Mo and Fe therein are maximized recovered.

[0056] (1) The nickel-based alloy solid waste of the above specification is baked at 600℃ for 8h in an alloy baking furnace to obtain a baked pretreated material;

[0057] (2) The lime and the baked pretreated material obtained in step (1) are sequentially added into a smelting furnace, and then smelting is carried out at a temperature of 1600℃, and then Al blocks are added to heat to 1660℃ to tap the steel, to obtain a smelted material; the impurity components of the material tapped after smelting are: C content 0.35wt%, Si content 0.20wt%;

[0058] The amount of lime is 1wt% of the weight of the nickel-based alloy cutting material in the baked pretreated material;

[0059] The smelting process is specifically as follows: when the nickel-based alloy scrap is self-melted by 80wt%, oxygen blowing is performed to assist smelting, the molten steel is cleaned, then the slag is removed, then lime and fluorite are added according to the fluidity of the slag to form new slag, most of the impurities in the molten steel are removed through multiple slagging, and FeSi powder is added during the smelting process; wherein, the ratio of the amount of FeSi powder to the amount of nickel-based alloy scrap in the roasted pretreated material is 2kg / t;

[0060] The ratio of the amount of Al block to the amount of nickel-based alloy scrap in the roasted pretreated material is 1kg / t;

[0061] (3) adding lime and the smelting material obtained in the step (2) into an AOD refining furnace, then sequentially performing AOD oxygen blowing decarburization treatment and deoxidation treatment to obtain a purified material;

[0062] wherein, the amount of lime added is 1wt% of the smelting material; the temperature of the smelting material after being added into the AOD refining furnace is 1560℃; at this time, the amount of lime added is the initial amount, not including the added amount;

[0063] The specific process of AOD oxygen blowing decarburization treatment is as follows: first blowing Ar:O2=1:4, the blowing time is 10min according to the carbon content, after the first blowing, sampling and temperature measurement are performed, the temperature is 1660℃, and the carbon content after the first blowing is 0.22wt%; second blowing Ar:O2=1:1, the blowing time is 8min according to the carbon content, after the second blowing, sampling and temperature measurement are performed, the temperature is 1690℃, and the carbon content after the second blowing is 0.10wt%; third blowing Ar:O2=3:1, the blowing time is 7min according to the carbon content, after the third blowing, sampling and temperature measurement are performed, the temperature is 1710℃, and the carbon content after the third blowing is about 0.020%; wherein, the Ar and O2 in the three-step blowing are volume ratios; the carbon content refers to the mass content of carbon in the AOD oxygen blowing decarburization treatment material;

[0064] After the third blowing, deoxidation treatment is performed, wherein the deoxidation treatment is composed of simultaneous slagging and deoxidation operations;

[0065] The slagging reagent is lime and fluorite, and the deoxidation agent is FeSi powder and Ca-Si powder;

[0066] The ratio of the amount of lime to the amount of smelting material is 10kg / t; the ratio of the amount of fluorite to the amount of smelting material is 2kg / t; the ratio of the amount of FeSi powder to the amount of smelting material is 150kg / t, and the ratio of the amount of Ca-Si powder to the amount of smelting material is 1kg / t;

[0067] (4) pouring the purified material obtained in the step (3), cutting into raw materials of reasonable size according to the required size, to obtain nickel-based alloy smelting raw materials;

[0068] The pouring temperature is 1530℃.

[0069] Example 2

[0070] A method for recycling nickel-based alloy solid waste, comprising the following steps:

[0071] The nickel-based alloy solid waste is composed of nickel-based alloy cutting material and grinding wheel ash powder; wherein the grinding wheel ash powder accounts for 1 / 4 of the total weight of the nickel-based alloy solid waste;

[0072] The nickel-based alloy cutting material, in terms of mass percentage, is composed of Ni: 40%, Cr: 15%, Mo: 2%, Co: 1%, and the balance of Fe;

[0073] The main components of the grinding wheel ash powder are SiO2, Al2O3 and SiC (without specific content determination)

[0074] The requirements are C≤0.03%, Si≤0.3%, P≤0.03%, S≤0.01%, and the maximum recovery of Ni, Cr, Co, Mo and Fe.

[0075] (1) The nickel-based alloy solid waste of the above specification is baked at 600℃ for 8 hours in an alloy baking furnace to obtain a baked pretreated material;

[0076] (2) Lime and the baked pretreated material obtained in step (1) are sequentially added to a smelting furnace, then smelting is carried out at a temperature of 1600℃, then Al blocks are added to raise the temperature to 1650℃, and the molten steel is tapped to obtain a smelted material; the impurity components of the material tapped after smelting are C content 0.45wt%, Si content 0.18wt%;

[0077] The amount of lime is 3wt% of the weight of the nickel-based alloy cutting material in the baked pretreated material;

[0078] The specific process of smelting is: when the nickel-based alloy cutting material itself is melted by 80wt%, oxygen blowing is carried out to assist melting, after the molten steel is cleaned, slag is removed, then lime and fluorite are added according to the fluidity of the slag to form new slag, and most of the impurities in the molten steel are removed through multiple slagging, and FeSi powder is added during smelting; wherein the amount ratio of FeSi powder to nickel-based alloy cutting material in the baked pretreated material is 5kg / t;

[0079] The amount ratio of Al blocks to nickel-based alloy cutting material in the baked pretreated material is 2kg / t;

[0080] (5) Lime and the smelted material are added to an AOD refining furnace, then AOD oxygen blowing decarburization treatment and deoxidation treatment are sequentially carried out, and a purified material is obtained

[0081] The amount of lime added is 3wt% of the smelting material; the temperature of the smelting material after being added into the AOD refining furnace is 1560℃; at this time, the amount of lime added is the initial amount, not including the additional amount;

[0082] The specific process of AOD oxygen decarburization treatment is as follows: first blowing Ar:O2=1:4, the blowing time is 10min according to the carbon content, after the first blowing, sampling and temperature measurement, the temperature is 1660℃, and the carbon content is 0.20wt% after the first blowing; second blowing Ar:O2=1:1, the blowing time is 8min according to the carbon content, after the second blowing, sampling and temperature measurement, the temperature is 1690℃, and the carbon content is 0.09wt% after the second blowing; third blowing Ar:O2=3:1, the blowing time is 7min according to the carbon content, after the third blowing, sampling and temperature measurement, the temperature is 1710℃, and the carbon content is about 0.018% after the third blowing; wherein, the Ar and O2 in the three-step blowing are volume ratios; the carbon content refers to the mass content of carbon in the AOD oxygen decarburization treated material;

[0083] After the third blowing, deoxidation treatment is carried out, wherein the deoxidation treatment is composed of simultaneous slagging and deoxidation operations;

[0084] The slagging reagent is lime and fluorite, and the deoxidation agent is FeSi powder and Ca-Si powder;

[0085] The usage ratio of lime to smelting material is 15kg / t; the usage ratio of fluorite to smelting material is 3kg / t; the usage ratio of FeSi powder to smelting material is 150kg / t, and the usage ratio of Ca-Si powder to smelting material is 1kg / t;

[0086] (6) pouring the purified material obtained in step (3), cutting into reasonable size raw materials according to the required size to obtain nickel-based alloy smelting raw materials;

[0087] The pouring temperature is 1530℃.

[0088] The nickel-based alloy smelting raw materials obtained in example 1 and example 2 are subjected to component analysis, and the results are shown in table 1, and the recovery rate is shown in table 2.

[0089] Table 1 Component content (wt%) of nickel-based alloy smelting raw materials obtained in example 1 and example 2

[0090] C Si Mn P S Cr Ni Mo Co Nb Cu Fe Example 1 0.026 0.148 0.285 0.010 0.008 6.786 47.22 1.005 2.248 0.092 0.064 41.879 Example 2 0.030 0.170 0.330 0.011 0.009 7.472 53.74 0.772 0.547 0.119 0.078 36.500

[0091] Table 2 Recovery rate of nickel-based alloy smelting raw materials obtained in example 1 and example 2

[0092]

[0093] Among them, the grinding and grinding addition amount refers to the content of nickel-based alloy in the nickel-based alloy solid waste. The raw materials for smelting the target product nickel-based alloy include the weight of the obtained steel ingot and the total weight of the material remaining in the injection pipe and slurry.

[0094] As can be seen from Tables 1 and 2, the method provided by this invention can convert nickel-based alloy solid waste into a low C, P, Si, S alloy steel ingot containing Ni, Cr, Co, and Mo, and the final recovery rate of alloying elements is ≥70%.

[0095] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for recycling of nickel-based alloy solid waste materials, characterized by, The method comprises the following steps: (1) baking nickel-based alloy solid waste to obtain baked pretreated material; (2) adding lime and the baked pretreated material obtained in step (1) into a smelting furnace in sequence, smelting, and tapping to obtain smelted material; (3) adding lime and the smelted material obtained in step (2) into an AOD refining furnace in sequence, sequentially performing AOD oxygen blowing decarburization treatment and deoxidation treatment, and tapping to obtain purified material; the amount of lime is 1-2wt% of the smelted material; (4) pouring the purified material obtained in step (3) to obtain nickel-based alloy smelting raw material; the AOD oxygen blowing decarburization treatment in step (3) is three-step blowing, and the process of the three-step blowing is as follows: first-step blowing Ar:O2=1:4, the blowing time is calculated according to the carbon content, after the first-step blowing is completed, sampling and temperature measurement are performed, and the temperature is 1650-1660℃; second-step blowing Ar:O2=1:1, the blowing time is calculated according to the carbon content, after the second-step blowing is completed, sampling and temperature measurement are performed, and the temperature is 1680-1690℃; third-step blowing Ar:O2=3:1, the blowing time is calculated according to the carbon content, after the third-step blowing is completed, sampling and temperature measurement are performed, and the temperature is 1700-1710℃; wherein the ratio of Ar and O2 in the process of the three-step blowing is a volume ratio; the carbon content refers to the mass content of carbon in the AOD oxygen blowing decarburization treated material; the carbon contents to be reached in the first-step blowing, the second-step blowing and the third-step blowing are ≤0.25%, ≤0.15% and ≤0.02% respectively.

2. The method of claim 1, wherein, the nickel-based alloy solid waste in step (1) is composed of nickel-based alloy cutting material and grinding wheel dust material; the grinding wheel dust material accounts for 1 / 4 of the total weight of the nickel-based alloy solid waste; the nickel-based alloy cutting material comprises the following components in percentage of the mass of the nickel-based alloy cutting material: Ni: 38-42%, Cr: 13-17%, Mo: 1-3%, Co: 0.5-1.5% and the balance of Fe.

3. The method of claim 1, wherein, the baking temperature in step (1) is 500-700℃, and the baking time is 8-10h.

4. The method of claim 1, wherein, the amount of lime in step (2) is 1-3% of the weight of the nickel-based alloy cutting material in the baked pretreated material.

5. The method of claim 1, wherein, in the process of smelting in step (2), slagging agent lime and / or fluorite are supplemented, and reducing agent FeSi powder is added.

6. The method of claim 1, wherein, the smelting temperature in step (2) is 1550-1650℃.

7. The method of claim 1, wherein, the tapping temperature in step (2) is 1630-1680℃.

8. The method of claim 1, wherein, the deoxidation treatment in step (3) comprises simultaneous slagging and deoxidation operations.

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