WO2023074987A1 - Recycling method for manufacturing high speed steel master alloy - Google Patents

Abstract

A method for recycling an HSS processing process waste comprises: a pre-treatment step of pre-treating an HSS processing process waste; a primary melting step of primarily melting the pre-treated processing process waste and at least one of ferromolybdenum, ferrotungsten, and ferrocobalt at a temperature of 1300 to 2500°C to form a primary molten material; and a preparation step of subjecting the primary molten material to ingot casting to prepare an HSS master alloy, wherein the pre-treatment step comprises: a separation step of separating the HSS processing process waste according to the composition; and a mixing step of mixing the separated HSS processing process waste with an oxide including at least one of CaO, SiO2, Al2O3, and MgO to form a mixture, the melting point of the mixture being 800 to 1700°C.

Description

Recycling method for manufacturing high-speed steel master alloy

The present invention relates to a method for recycling high-speed steel processing waste, and more particularly, to a method for manufacturing a high-speed steel master alloy by recycling high-speed steel processing waste.

High Speed Steel (HSS) refers to special steel with heat resistance used in tools for cutting metal materials at high speeds. HSS is used as a material for tools and molds, and is a special steel material used throughout the industry as a part material for automobiles, ships, steel, machinery, and aviation.

When HSS is produced, waste is generated. The HSS process waste is a waste generated from the HSS material cutting process, size fitting and surface polishing process, and is a mixture of cutting oil and abrasive, turning scrap and The process sludge of the polishing process is included.

It is known that HSS process waste is generated at more than 100 tons/month and 1,200 tons/year, and when considering items other than tools, the amount reaches tens or hundreds of times. Most of the turning and abrasive powders generated in the HSS processing process are landfilled or mixed with scrap metal to become impurities in smelters, and process sludge from the grinding process among HSS process wastes is landfilled as general or designated waste.

Therefore, there is a demand for methods capable of recycling such HSS process waste.

An object to be solved by the present invention is to provide a method for recycling HSS processing waste, which can turn waste into resources by introducing HSS processing waste into a process for making HSS.

An object of the present invention is a pretreatment step of pretreating HSS processing waste, at least one of ferro molybdenum, ferro tungsten, and ferro cobalt, and the pretreated HSS processing waste at 1300 to 2500 degrees Celsius (° C. A first melting step of forming a melt, and a manufacturing step of manufacturing an HSS master alloy by casting the first melt into an ingot, wherein the pretreatment step is a separation step of separating the HSS processing waste according to the composition and mixing an oxide containing at least one of CaO, SiO ₂ , Al ₂ O ₃ , and MgO and the separated HSS processing waste to form a mixture, wherein the melting point of the mixture is 800 to 1700 °C. This can be achieved by recycling of HSS processing waste.

According to the present invention, it is possible to provide a method for recycling HSS processing waste, which can recycle waste by inputting HSS processing waste into a process for making HSS.

According to the present invention, it is possible to provide a method for recycling HSS processing wastes that does not require separate control of impurities by recycling HSS processing wastes into HSS mother alloys and constantly controlling the composition of the recycled HSS mother alloys.

1 is a flowchart schematically illustrating a recycling method of HSS processing waste according to an embodiment of the present invention.

2 is a flowchart schematically illustrating a pretreatment step included in a method for recycling HSS processing waste according to an embodiment of the present invention.

3 is a table showing the composition of HSS master alloys prepared according to Examples.

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and the spirit of the present invention will be sufficiently conveyed to those skilled in the art.

Like reference numbers have been used for like elements in describing each figure. In the accompanying drawings, the dimensions of the structures are shown enlarged than actual for clarity of the present invention. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise specified, all numbers, values, and/or expressions expressing quantities of ingredients, reaction conditions, or materials used herein are intended to represent, among other things, that such numbers are intended to represent, among other things, the variety of measurements taken to obtain such values. Since these are approximations that reflect uncertainty, they should be understood as being qualified by the term "about" in all cases. Also, when numerical ranges are disclosed herein, such ranges are contiguous and include all values from the minimum value of such range to the maximum value inclusive, unless otherwise indicated. Furthermore, where such ranges refer to integers, all integers from the minimum value to the maximum value inclusive are included unless otherwise indicated.

In this specification, where ranges are stated for a variable, it will be understood that the variable includes all values within the stated range inclusive of the stated endpoints of the range. For example, a range of "5 to 10" includes values of 5, 6, 7, 8, 9, and 10, as well as any subrange of 6 to 10, 7 to 10, 6 to 9, 7 to 9, and the like. inclusive, as well as any value between integers that fall within the scope of the stated range, such as 5.5, 6.5, 7.5, 5.5 to 8.5 and 6.5 to 9, and the like. Also, for example, the range of “10% to 30%” includes values such as 10%, 11%, 12%, 13% and all integers up to and including 30%, as well as values from 10% to 15%, 12% to 12%, etc. It will be understood to include any subrange, such as 18%, 20% to 30%, and the like, as well as any value between reasonable integers within the scope of the stated range, such as 10.5%, 15.5%, 25.5%, and the like.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings commonly understood by those skilled in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

Hereinafter, a recycling method of high speed steel (HSS) processing waste according to an embodiment of the present invention will be described with reference to the drawings.

1 is a flowchart schematically illustrating a recycling method of HSS processing waste according to an embodiment of the present invention. 2 is a flowchart schematically illustrating a pretreatment step included in a method for recycling HSS processing waste according to an embodiment of the present invention.

1 and 2, a method for recycling HSS processing waste according to an embodiment of the present invention includes a pretreatment step (S100) of pretreating HSS processing waste, at least one of ferro molybdenum, ferro tungsten, and ferro cobalt. and a first melting step (S200) of first melting the pretreated HSS processing waste at a temperature of 1300 to 2500 degrees Celsius (° C.) to form a first melt (S200), and casting the first melt into an ingot to form an HSS master alloy. It includes a manufacturing step (S300) of manufacturing.

HSS processing waste is pretreated (S100). In the pretreatment step (S100), the HSS processing waste may include at least one of HSS process sludge, HSS turning scrap, and HSS scrap. In the present specification, “HSS process sludge” or “HSS abrasive powder” may refer to abrasive powder generated in a polishing process (size fitting process) of the HSS processing process. "HSS process sludge" may mean HSS sludge.

In the present specification, "HSS turning scrap" may refer to scrap such as chips, shavings, metal strips, and the like generated in various cutting processes (milling, drilling, turning, etc.) of the HSS machining process.

In the present specification, "HSS scrap" may refer to HSS tools, molds, parts, and scraps generated during the HSS processing process that are discarded after being used in the process.

The composition of the HSS process sludge, HSS turning scrap, and HSS scrap may be as shown in Table 1 below, for example.

HSS process sludge
(unit: mass%) HSS turning scrap
(unit: mass%) HSS scrap
(unit: mass%) C 8.7840 10.219 5.1019 O 18.7820 3.5754 1.3571 Na 1.5824 - - Mg 0.1669 0.0597 0.0539 Al 7.8546 0.1633 0.2571 Si 1.4977 0.2603 0.2888 P 0.0095 0.0212 0.0194 Cl - 0.0312 0.0216 K 0.0902 - - Ca 0.1506 - - V 0.6352 1.6727 1.6504 Cr 1.4401 3.7970 4.2840 Mn 0.2896 0.3344 0.3249 Fe 54.0450 66.2185 75.7551 Co 0.4015 3.7732 0.3014 Ni 0.0891 0.1275 0.1524 Cu 0.0564 0.0567 - Mo 1.6927 4.1898 4.6808 W 2.4324 5.5062 5.7513

In the pretreatment step (S100), the HSS processing waste is, for example, 2 to 10% by weight of W, 1 to 5% by weight of Cr, 0.5 to 2% by weight of V, 1 to 10% by weight of Mo, and 1 to 10% by weight of Co. The pretreatment step (S100) may include a separation step (S110) and a mixing step (S120).

HSS processing waste is separated according to composition (S110). For example, HSS processing waste can be separated according to the content of tungsten, molybdenum, cobalt, and the like.

An oxide containing at least one of CaO, SiO ₂ , Al ₂ O ₃ and MgO and separated HSS processing waste are mixed to form a mixture (S120). As an example, a mixture may be formed by mixing oxides including all of CaO, SiO ₂ , Al ₂ O ₃ and MgO and separated HSS processing waste. When the oxide is added, ore such as silica sand, dolomite or limestone may be used and added.

Since the melting point can be lowered by adding the oxide, forming a mixture using the oxide has an advantageous effect in terms of process due to the advantage of lowering the overall energy.

In other words, if the HSS processing waste includes impurities mixed in abrasive powder or scrap, it must be heated above a certain temperature to separate it from the HSS component. By creating slag with a low melting point, it is possible to separate it from the HSS component.

Considering the characteristics of the HSS processing waste, such as that the abrasive contained in the HSS processing waste mainly contains aluminum oxide, a mixture may be formed by additionally adding an appropriate oxide to achieve a desired effect. For example, one or more of K ₂ O, Fe ₂ O ₃ , Na ₂ O and CaF ₂ may be further added as an oxide to form a mixture.

The melting point of the mixture may be between 800 and 1700 °C. For example, a mixture of an oxide including at least one of CaO, SiO ₂ , Al ₂ O ₃ , and MgO and an oxide included in HSS processing waste may have a melting point of 800 to 1700 °C.

In the mixing step (S120), the mixture may include Al ₂ O ₃ , CaO, SiO ₂ and MgO. In the mixing step (S120), the weight ratio of Al ₂ O ₃ :CaO,:SiO ₂ :MgO may be 1:0.5 to 10:0.5 to 11:0.1 to 7. If it is within the above range, a low melting point may be formed, which may bring about an advantageous effect in terms of processing, and it may be difficult to manufacture a product usable as an HSS master alloy. For example, when the addition ratio of the oxide is 5% by weight of Al ₂ O ₃ , it is preferable to add 10 to 50% by weight of CaO, 25 to 55% by weight of SiO ₂ and 1 to 20% by weight of MgO to make the melting point lower than 1500 ° C. do. When the addition ratio of the oxide is 30% by weight of Al ₂ O ₃ , it is preferable to add 15 to 60% by weight of CaO, 15 to 60% by weight of SiO ₂ and 1 to 10% by weight of MgO to make the melting point lower than 1500 ° C.

The mixing step (S120) may be performed, for example, after at least one of dry gravity screening and wet gravity screening is performed to lower the content of oxides included in the HSS processing waste.

The pretreatment step (S100) may further include a specific gravity selection step. In the gravity screening step, the HSS processing waste is gravity separated, and a material lighter than Fe is gravity separated from the HSS processing waste.

The specific gravity screening step may include a dry specific gravity screening step and a wet specific gravity screening step. In the dry gravity screening step, the moisture of the HSS processing waste is dried at 80 to 110 ° C., and the oil of the dried HSS processing waste is washed with at least one of alkali and alcohol, and then dried. For example, outside the above temperature range, moisture from HSS processing waste is not sufficiently removed, or there is no economic benefit due to excessive energy consumption during drying.

In the dry gravity screening step, the dried HSS processing waste can be separated according to specific gravity through an air separator, and can be repeated several times or through several air separators as necessary. In the dry specific gravity screening step, for example, sieving may be performed to select by particle size in order to increase screening efficiency.

In the wet gravity separation step, the dried HSS processing waste after oil washing can be mixed with water and gravity separation can be performed on a shaking table. In the wet gravity sorting step, wastes from the HSS processing process can be sorted by installing several repetitions or several stages of shaking tables as needed. After sorting, the moisture content can be dried to less than 10% by weight. In the wet specific gravity screening step, for example, sieving may be performed for each particle size to increase screening efficiency.

At least one of ferro molybdenum, ferro tungsten, and ferro cobalt and pretreated HSS processing waste are first melted at 1300 to 2500 ° C. to form a first melt (S200). If it is less than the above range, melting may not be sufficient, and if it exceeds the above range, melting may be excessive, making it difficult to manufacture a product usable as an HSS master alloy, and there is no economic benefit, such as the need to manufacture a special crucible that can withstand high temperatures.

The first melting step (S200) may be performed for 1 to 8 hours in a melting furnace, for example. If it is less than the above range, melting may not be sufficient, and if it exceeds the above range, it may be difficult to manufacture a product usable as an HSS master alloy due to excessive melting.

In the first melting step (S200), melting may be performed in a vacuum atmosphere or an inert gas atmosphere.

In the first melting step (S200), at least one of ferro molybdenum, ferro tungsten, and ferro cobalt may be added to obtain a desired composition of the HSS master alloy. Since the metal can be oxidized, a desired composition of the HSS master alloy can be obtained by adding ferro molybdenum, ferro tungsten, and/or ferro cobalt.

In the first melting step (S200), high-pressure oxygen may be blown into the melt in order to degas and lower the carbon content.

In the first melting step (S200), at least one of an oxide, a deoxidizer, and a flux added when forming a slag composition or mixture may be further added.

In the first melting step (S200), at least one of HSS turning scrap, HSS scrap, and HSS process sludge may be further added.

In the first melting step (S200), when ferro molybdenum is added, the weight of the ferro molybdenum may be 0.1 to 10% based on the weight of the pretreated HSS processing waste. In the first melting step (S200), when ferro-tungsten is added, the weight of ferro-tungsten may be 0.1 to 10% based on the weight of the pretreated HSS processing waste. In the first melting step (S200), when ferro cobalt is added, the weight of ferro cobalt may be 0.1 to 10% based on the weight of the pretreated HSS processing waste.

In the first melting step (S200), based on the weight of the pretreated HSS processing waste, ferro tungsten having a weight of 1 to 2%, ferro molybdenum having a weight of 4 to 5%, and ferro having a weight of 0.5 to 1% Cobalt may be added. A recyclable HSS master alloy may be prepared by adding ferro tungsten, ferro molybdenum, and ferro cobalt within the above ranges.

In one embodiment, in the recycling method of HSS processing waste according to an embodiment of the present invention, when the HSS processing waste includes HSS processing sludge, HSS turning scrap, and HSS scrap, in the mixing step (S120), Oxide and HSS process sludges can be mixed. In this case, the oxide may include one or more of CaO, SiO ₂ , Al ₂ O ₃ , and MgO. In the mixing step (S120), HSS turning scrap and HSS scrap may not be mixed. In the first melting step (S200), a portion of the HSS scrap, a portion of the mixture, a portion of the HSS turning scrap, the remaining amount of the mixture, the remaining amount of the HSS turning scrap, and the remaining amount of the HSS scrap are sequentially introduced into the melting furnace. can be inserted The melting furnace is melted in a temperature range of 1500 to 1700 ° C., and after a certain time has elapsed, ferro molybdenum, ferro tungsten, and ferro cobalt are added to maintain the temperature range for a certain time.

An HSS master alloy is manufactured by casting the primary melt into an ingot (S300). For example, the primary melt is press formed and ingot cast.

The HSS master alloy prepared in the manufacturing step (S300) includes (1) 5 to 10 wt% of W, 3 to 6 wt% of Cr, 1 to 6 wt% of V, and 6 to 11 wt% of Mo; (2) 5 to 10 wt% W, 3 to 6 wt% Cr, 1 to 6 wt% V, 6 to 11 wt% Mo, and 4 to 12 wt% Co; (3) 5 to 12 wt% Mo, 3 to 6 wt% Cr, 1 to 6 wt% V, and 6 to 11 wt% W; and (4) 5 to 12 wt% Mo, 3 to 6 wt% Cr, 1 to 6 wt% V, 6 to 11 wt% W, and 4 to 12 wt% Co. can In the compositions (1) to (4) above, the other compositions may include at least one of Fe, C, O, Al, Si, P, Cl, Mn, and Ni.

The recycling method of HSS processing waste according to an embodiment of the present invention has a composition within the above range, and can manufacture a product usable as an HSS master alloy.

The recycling method of HSS processing waste according to an embodiment of the present invention may further include an initial impurity removal step of removing initial impurities based on particle size through sieving by making the HSS processing waste into a powder form.

The recycling method of HSS processing waste according to an embodiment of the present invention may further include a purification step of moving the primary melt to purification and degassing and purifying impurities. The purification step may be performed, for example, via at least one of thermal decomposition and electrolysis.

A recycling method of HSS processing waste according to an embodiment of the present invention is to melt at least one of ferro molybdenum, ferro tungsten, ferro cobalt, ferro chromium, and ferro vanadium and a melt cast ingot at 1300 to 1800 ° C. A secondary melting step of forming a secondary melt may be further included. If it is less than the above range, melting may not be sufficient, and if it exceeds the above range, there is no economic benefit due to excessive energy consumption.

The secondary melting step can be performed in a vacuum or inert gas atmosphere.

The secondary melting step may be performed, for example, in a melting furnace for 1 to 8 hours. If it is less than the above range, melting may not be sufficient, and if it exceeds the above range, there is no economic benefit due to excessive energy consumption.

In the secondary melting step, at least one of ferro molybdenum, ferro tungsten, ferro cobalt, ferro chromium, and ferro vanadium may be added to obtain a desired composition of the HSS master alloy.

In the secondary melting step, high-pressure oxygen may be blown into the melt in order to degas and lower the carbon content.

In the secondary melting step, at least one of an oxide, a deoxidizer, and a flux added when forming the slag composition or mixture may be further added.

In the secondary melting step, at least one of HSS turning scrap, HSS scrap, and HSS process sludge may be further added.

The recycling method of HSS processing waste according to an embodiment of the present invention may further include a purification step of moving the secondary melt to a purification furnace to degas and purify impurities. The purification step may be performed, for example, via at least one of thermal decomposition and electrolysis.

Hereinafter, the present invention will be described in more detail through specific examples. The following examples are merely examples to aid understanding of the present invention, and the scope of the present invention is not limited thereto.

Example 1

As HSS processing waste, 1 kg of HSS scrap, 1 kg of HSS turning scrap, and 2 kg of HSS sludge were prepared. The composition of each of HSS scrap, HSS turning scrap, and HSS process sludge may be the same as that shown in Table 1 above.

2 kg of HSS sludge was mixed with 400 g of limestone, 630 g of silica sand, and 720 g of dolomite (hereinafter, see Table 2 for specific composition), and the weight ratio of Al ₂ O ₃ : SiO ₂ : CaO : MgO included in the mixture was 20:42:28 :10.

raw material name SiO ₂ Al ₂ O ₃ CaO MgO Na ₂ O Fe ₂ O ₃ silica sand 94.14 2.19 - - - - limestone 1.50 1.10 54.00 0.42 0.50 0.100 dolomite 30.86 21.01

For melting, a graphite crucible (2L), which is a high-frequency melting furnace, was used in an atmospheric atmosphere. HSS scrap (0.5 kg), mixture (2 kg), HSS turning scrap (0.5 kg), mixture (1.75 kg), HSS turning scrap (0.5 kg), and HSS scrap (0.5 kg) were charged in the order of graphite crucible. After 10 minutes elapsed after the temperature was raised to 1700° C. (heating time 30 minutes), 35 g of ferro tungsten, 95 g of ferro molybdenum, and 16 g of ferro cobalt were added and maintained for 20 minutes. After pouring it into the prepared mold and cooling it, the slag was broken and brushed off, and 2.85 kg of the HSS master alloy product was manufactured. The composition ratio of the manufactured HSS master alloy product is shown in FIG. 3 . Referring to FIG. 3, it was confirmed that 2.85 kg of a product having physical properties usable as an HSS master alloy was obtained using 4 kg of HSS processing waste.

Example 2

As HSS processing waste, 1 kg of HSS scrap, 1 kg of HSS turning scrap, and 2 kg of HSS sludge were prepared. The composition of each of HSS scrap, HSS turning scrap, and HSS process sludge may be the same as that shown in Table 1 above.

2 kg of HSS sludge was mixed with 815 g of limestone, 1035 g of silica sand, and 685 g of dolomite so that the weight ratio of Al ₂ O ₃ : SiO ₂ : CaO : MgO included in the mixture was 15:48:30:7.

Thereafter, an HSS master alloy product having physical properties usable as an HSS master alloy was manufactured in the same manner as in Example 1.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, a person skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (15)

A pre-treatment step of pre-treating high-speed steel (HSS) processing waste; A first melting step of first melting at least one of ferro molybdenum, ferro tungsten, and ferro cobalt and the pretreated HSS processing waste at a temperature of 1300 to 2500 degrees Celsius (° C.) to form a first melt; and A manufacturing step of manufacturing an HSS master alloy by casting the primary melt into an ingot, The preprocessing step is A separation step of separating the HSS processing waste according to composition; and CaO, SiO ₂ , Al ₂ O ₃ , and an oxide containing at least one of MgO and the separated HSS processing waste are mixed to form a mixture, wherein the melting point of the mixture is 800 to 1700 ° C. Recycling method for producing HSS master alloy from HSS processing waste. According to claim 1, The HSS master alloy manufactured in the manufacturing step is (1) 5 to 10 wt% W, 3 to 6 wt% Cr, 1 to 6 wt% V, and 6 to 11 wt% Mo; (2) 5 to 10 wt% W, 3 to 6 wt% Cr, 1 to 6 wt% V, 6 to 11 wt% Mo, and 4 to 12 wt% Co; (3) 5 to 12 wt% Mo, 3 to 6 wt% Cr, 1 to 6 wt% V, and 6 to 11 wt% W; and (4) HSS having a composition of one of 5 to 12 wt% Mo, 3 to 6 wt% Cr, 1 to 6 wt% V, 6 to 11 wt% W, and 4 to 12 wt% Co. Recycling method for producing HSS master alloy from fabrication process waste. According to claim 1, In the preprocessing step, The HSS processing waste is a recycling method for producing an HSS master alloy from HSS processing waste including at least one or more of HSS processing sludge, HSS turning scrap, and HSS scrap. According to claim 1, In the preprocessing step, The HSS processing waste is 2 to 10 wt% W, 1 to 5 wt% Cr, 0.5 to 2 wt% V, 1 to 10 wt% Mo, and 1 to 10 wt% Co HSS from processing waste. Recycling methods to manufacture alloys. According to claim 1, In the mixing step, The mixture includes CaO, SiO ₂ , Al ₂ O ₃ , and MgO; The weight ratio of Al ₂ O ₃ :CaO,:SiO ₂ :MgO included in the mixture is 1:0.5 to 10:0.5 to 11: 0.1 to 7. A recycling method for producing an HSS master alloy from HSS processing waste. According to claim 1, The preprocessing step is A recycling method for producing an HSS master alloy from HSS processing waste, further comprising a specific gravity separation step of separating the weight of the HSS processing waste and separating a material lighter than Fe from the HSS processing waste. According to claim 6, The specific gravity selection step is A dry gravity separation step of drying the moisture of the HSS processing waste at 80 to 110 ° C., washing and drying the oil of the dried HSS processing waste with at least one of alkali and alcohol; and A recycling method for producing an HSS master alloy from HSS processing waste, comprising: mixing the dried HSS processing waste with water after washing the oil and performing specific gravity separation on a shaking table. According to claim 1, In the first melting step, When the ferro molybdenum is added, the weight of the ferro molybdenum is 0.1 to 10% based on the weight of the pretreated HSS processing waste, When the ferro tungsten is added, the weight of the ferro tungsten is 0.1 to 10% based on the weight of the pretreated HSS processing waste, When the ferro cobalt is added, the weight of the ferro cobalt is 0.1 to 10% based on the weight of the pretreated HSS processing waste. Recycling method for producing an HSS master alloy from HSS processing waste. According to claim 1, In the first melting step, Based on the weight of the pretreated HSS processing waste, A recycling method for producing an HSS master alloy from HSS processing process wastes in which ferro tungsten having a weight of 1 to 2%, ferro molybdenum having a weight of 4 to 5%, and ferro cobalt having a weight of 0.5 to 1% are added. According to claim 1, The HSS processing waste includes HSS process sludge, HSS turning scrap, and HSS scrap, In the mixing step, mixing the oxide and the HSS process sludge, The first melting step is A portion of the HSS scrap, a portion of the mixture, a portion of the HSS turning scrap, the remaining amount of the mixture, the remaining amount of the HSS turning scrap, and the remaining amount of the HSS scrap are sequentially charged into the melting furnace to perform the primary melting. Recycling method for producing HSS master alloy from HSS processing waste. According to claim 1, The first melting step is A recycling method for producing an HSS master alloy from HSS processing wastes performed in a vacuum atmosphere or an inert gas atmosphere. According to claim 1, The recycling method of manufacturing the HSS master alloy from the HSS processing wastes further comprising an initial impurity removal step of making the HSS processing wastes into a powder form and removing initial impurities based on the particle size through sieving. According to claim 1, A recycling method for producing an HSS master alloy from HSS processing waste, further comprising a purification step of moving the primary melt to a refining furnace to degas and purify impurities. According to claim 1, HSS further comprising a secondary melting step of forming a secondary melt by secondary melting at least one of ferro molybdenum, ferro tungsten, ferro cobalt, ferro chromium, and ferro vanadium and the ingot cast melt at 1000 to 1300 ° C. Recycling method for producing HSS master alloy from fabrication process waste. According to claim 1, In the mixing step, The mixture is CaO, SiO ₂ , Al ₂ O ₃ , and MgO A recycling method for producing an HSS master alloy from HSS processing waste, comprising at least one of K ₂ O, Fe ₂ O ₃ , Na ₂ O and CaF ₂ .

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