WO2015105394A1

WO2015105394A1 - Method for manufacturing deoxidizer for steelmaking using waste aluminum cans and aluminum chips

Info

Publication number: WO2015105394A1
Application number: PCT/KR2015/000305
Authority: WO
Inventors: 김상기; 김상동; 이태호
Original assignee: 현대자원산업 주식회사
Priority date: 2014-01-13
Filing date: 2015-01-13
Publication date: 2015-07-16
Also published as: KR101428507B1

Abstract

The present invention relates to a method for manufacturing a deoxidizer for steelmaking using waste aluminum cans and aluminum chips and, more particularly, to a manufacturing system wherein waste aluminum cans, which have been sorted and recovered from waste cans using magnetic forces and eddy currents, are pulverized; plastic labels, iron components, and various kinds of paper are removed therefrom; the same is molded into an aluminum pulverized product compressed powder (billets for extrusion) using a high-pressure press; the same is subjected to continuous extrusion molding using an aluminum extrusion molding machine; and the same is cut by a predetermined length using a press, thereby manufacturing a product that can be used as an aluminum deoxidizer for steelmaking. The present invention is characterized in that, compared with a technology for manufacturing a deoxidizer by dissolving waste aluminum cans or for manufacturing aluminum ingots, which are generally used conventional schemes, a more stable yield ratio can be secured.

Description

Manufacturing method of deoxidizer for steelmaking using waste aluminum can and aluminum chip

The present invention relates to a method for manufacturing deoxidant for steelmaking using waste aluminum cans and aluminum chips. It was limited to The present technology relates to a method for manufacturing deoxidant for steel making using waste aluminum cans and aluminum chips that can produce deoxidizer and aluminum material to increase the recovery rate without dissolving it.

Waste aluminum cans and aluminum scrap are commonly used to produce deoxidizers or aluminum alloys, which are usually compressed or pulverized. In general, in the melting process of aluminum, oxidation proceeds rapidly by heat and direct fire, and the amount of about 30% is generally lost, and the yield remains at about 70%.

Here, the deoxidizer is used to remove oxygen from the molten metal, and performs the function of increasing the weldability and toughness of steel products, stainless steel, resistance to high temperature and corrosion, and increasing molten steel and slag deoxidation and aluminum component and impact value. Therefore, it is an indispensable raw material for steel and stainless steel production. These deoxidants use phosphorus or silicon for copper and its alloys and manganese or aluminum for steelmaking.

Therefore, in the aluminum alloy factory as well as in the deoxidizer manufacturing maker, waste aluminum cans, waste aluminum processed chips, and particulate aluminum scraps having a low recovery rate have been formed at a lower cost than general aluminum scraps.

In particular, when the waste aluminum cans manufactured in the form of cylindrical billets were melted in an alloy plant or a deoxidizer manufacturing plant, the oxidation was more increased, causing a problem of recovering aluminum. Therefore, it is a situation that a manufacturer prefers compressed products as a general recycling method of waste aluminum cans at home and abroad, and there is a problem in that mass use is difficult due to various foreign matters and yield problems.

As such, the manufacturers of aluminum deoxidizers based on waste aluminum cans currently produce aluminum deoxidizers or alloys by remelting their compressed products after a separate grinding process, and yield a large amount of aluminum dross due to yield problems. Due to the generation of environmentally hazardous wastes, there is a need for products that dramatically increase yields and generate less environmental waste.

However, it is a reality that it is inevitable to dissolve waste aluminum cans and aluminum scraps again to produce deoxidizers and alloys. In this process, environmentally harmful substances such as aluminum dross are discharged, and there is a problem in that a lot of energy consumption and environmentally harmful substances are generated even during the reprocessing thereof.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) Republic of Korea Patent Publication No. 10-0850300

Accordingly, the present invention has been made to solve the above conventional problems,

The problem of low melt yield of the existing waste aluminum recycling system and the recycling of raw materials that are difficult to recycle through the dissolution of aluminum processed chips and powders, which are generally called nutrients, can be solved by using recycling techniques other than dissolution methods. Manufacture of deoxidizer for steelmaking using waste aluminum can and aluminum chip, which can produce high quality aluminum deoxidizer without re-dissolving high-purity waste aluminum can and aluminum scrap, and can produce aluminum scrap with much higher recovery rate than same waste aluminum The purpose is to provide a method.

In order to achieve the above object, the present invention includes a feed screw device for supplying a mixed product mixed with the collected aluminum cans and iron cans, and scrap generated after processing of general aluminum to one side;

A first magnetic separator for separating the iron can and the iron by magnetic force while the mixed product and the scrap supplied through the feed screw device are transferred through the first transport conveyor;

An aluminum separator formed at a rear end of the first conveying conveyor and sorted into aluminum and nonferrous by eddy currents;

A two-axis crusher for crushing the aluminum compressed product introduced from the outside and then transferring the crushed aluminum through a third conveying conveyor;

An aluminum uniaxial pulverizer for crushing the aluminum sorted by the aluminum sorting machine and the aluminum crushed product which is crushed and transferred by the biaxial crusher by being transported inside through a second conveying conveyor;

A wind separator for sorting plastics and papers contained in aluminum by wind power when pulverized by the single-axis crusher and transported by a fourth transport conveyor;

A rotating drum magnet sorter for sorting magnetic iron in the aluminum passing through the wind separator by magnetic force;

An aluminum pulverized compactor for flatly forming the selected aluminum through the rotating drum magnetic separator;

A drying silo, wherein the aluminum compressed through the aluminum crushed product compactor is transferred along with the elevator conveyor to be temporarily stored and then dried, and the dried aluminum is transferred through a fifth transport conveyor;

An aluminum billet maker for compressing the aluminum transferred through the fifth conveying conveyor at a high pressure;

A billet preheating furnace for charging the aluminum billet manufactured by the aluminum billet maker at 350 to 450 ° C., and then charging the billet preheating furnace;

An aluminum molding extruder for extruding the aluminum billet charged in the billet preheating furnace to a predetermined shape and a diameter dimension;

An aluminum deoxidizer cutter which continuously cuts the aluminum deoxidizer extruded by the aluminum molding extruder to a predetermined length;

It relates to a method for producing steel deoxidizer using waste aluminum cans and aluminum chips comprising a; a cooler for cooling the aluminum deoxidizer cut in the aluminum deoxidizer cutter.

As described above, the steelmaking deoxidizer manufacturing method using the waste aluminum can and the aluminum chip of the present invention is a method of producing a billet by refining the waste aluminum can and aluminum chip scrap without re-melting, and the extrusion molding the billet As a result, it is possible to produce an aluminum deoxidizer such as specific gravity of aluminum and an aluminum molding ingot which can be re-dissolved.

1 is a schematic diagram showing a manufacturing method of a deoxidizer for steelmaking using waste aluminum cans and aluminum chips according to an embodiment of the present invention.

2 and 3 is a cross-sectional view showing a cross-sectional structure of the extrusion billet according to an embodiment of the present invention.

The present invention has the following features to achieve the above object.

In addition, the present invention will be described more clearly through the preferred embodiment accordingly.

Before describing the various embodiments of the present invention in detail with reference to the accompanying drawings, it can be seen that the application is not limited to the details of the configuration and arrangement of the components described in the following detailed description or shown in the drawings. will be. The invention can be implemented and carried out in other embodiments and can be carried out in various ways. In addition, device or element orientation (e.g., "front", "back", "up", "down", "top", "bottom" The expressions and predicates used herein with respect to terms such as "," "left", "right", "lateral", etc. are used merely to simplify the description of the present invention, and related apparatus. Or it will be appreciated that the element does not simply indicate or mean that it should have a particular direction. Moreover, terms such as "first" and "second" are used in the specification and the appended claims for purposes of illustration and are not intended to indicate or mean the relative importance or spirit.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a schematic view showing a manufacturing method of a steel deoxidizer using waste aluminum cans and aluminum chips according to an embodiment of the present invention, Figures 2 and 3 shows a cross-sectional structure of the extrusion billet according to an embodiment of the present invention. It is a cross section.

As shown in Figures 1 to 3, the manufacturing method of the deoxidizer for steelmaking using waste aluminum cans and aluminum chips of the present invention is a mixed product mixed with the collected aluminum cans and iron cans, and scrap generated after processing of general aluminum A supply screw device 10 for supplying to one side; A first magnetic separator 20 for separating the iron can and the iron by magnetic force while the mixed product and the scrap supplied through the feed screw device 10 are transferred through the first transfer conveyor 21; An aluminum sorter (30) formed at a rear end of the first transport conveyor (21) and sorted into aluminum and nonferrous by eddy currents; A twin-shaft crusher 40 for crushing the aluminum compressed product introduced from the outside and then transferring it through the third transfer conveyor 41; The aluminum sorted by the aluminum sorter 30 and the aluminum shredded by the two-axis shredder 40 is transferred to the interior through the second conveying conveyor 31 and crushed into 1mm ~ 70mm 1-axis A grinder 50; A wind selector 60 which is crushed through the single-shaft crusher 50 and selects plastics and papers contained in aluminum by wind power when transferred by the fourth conveying conveyor 61; A rotating drum magnet sorter (70) for selecting magnetic powdered iron from the aluminum passing through the wind separator (60) by magnetic force; An aluminum crushed compactor (80) for flatly forming aluminum selected through the rotating drum magnetizer (70); The aluminum squeezed through the aluminum crusher compactor 80 is transported along with the elevator conveyor 81 to be temporarily stored, and then dried. The drying silo 90 transfers the dried aluminum through the fifth transport conveyor 91. )Wow; An aluminum billet maker 100 for compressing the aluminum transferred through the fifth conveying conveyor 91 at a high pressure; A billet preheating furnace 110 for charging and heating the aluminum billet manufactured in the aluminum billet maker 100 after 350 to 450 ° C .; An aluminum molding extruder 120 for extruding the aluminum billet charged in the billet preheating furnace 110 to a predetermined shape and a diameter dimension; An aluminum deoxidizer cutter 130 for continuously cutting the aluminum deoxidizer extruded by the aluminum molding extruder 120 to a predetermined length; It comprises a; cooler 140 for cooling the aluminum deoxidizer cut in the aluminum deoxidizer cutter 130.

In this case, as shown in FIG. 1, as shown in FIG. 1, a mixed product mixed with aluminum cans and iron cans collected and connected by various conveyors, and scrap generated after processing of general aluminum are transferred.

Here, the aluminum sorter 30 is divided into non-ferrous materials such as aluminum, non-magnetic materials such as stainless steel, plastic, glass bottles, garbage, etc., and the aluminum is uniaxial mill 50 through the second conveying conveyor (31) ), The nonmagnetic material and the non-ferrous material are discharged to the outside through the dust conveyor (32).

Further, a discharge chute 71 for collecting and discharging the powdered iron, the plastics, and the papers selected by the wind separator 60 and the rotary drum magnetic separator 70 into one place is further configured, and through the cooler 140. A packaging machine 150 for packaging the cooled aluminum deoxidizer is further configured.

In addition, the supply screw device 10 is configured to supply waste aluminum cans and general aluminum scrap to each raw material product lot for each hopper, and a first magnetic separator located on the first conveying conveyor 21. 20 automatically sorts iron cans and irons by magnetic force, and is further provided with a hopper or storage container (not shown) for transporting and storing the sorted iron cans and irons. At this time, the aluminum sorter 30 using the eddy current, the dust conveyor 32, the first dust storage container (not shown) and the non-ferrous storage container (not shown) are further provided.

On the other hand, the iron is continuously crushed in the waste aluminum can and aluminum scrap from the discharge screw through a rotating drum magnetic sorter 70 to sort the iron through the discharge chute 71 to the second iron reservoir (not shown) Are collected.

In particular, waste aluminum cans and aluminum scraps that have passed through the rotating drum magnetic separator 70 may separate waste vinyl, paper, glass, and the like through the wind separator 60. In addition, a third dust reservoir (not shown) is further provided to store materials other than aluminum selected by the wind turbine 60.

As a result, the aluminum scrap is flatly processed in the crushing product compactor 80 via the fourth conveying conveyor 61, and the processed aluminum is transferred to a drying silo 90 that can be stored and dried through the elevator conveyor 81. will be. At this time, the continuously dried waste aluminum scrap is processed into a cylindrical billet.

In addition, there is further provided a continuous preheating furnace for continuously preheating the processed billet to a certain temperature, a heating furnace for uniformly heating it to a uniform temperature, and a dust collector (not shown) for removing gas and air pollutants. .

Meanwhile, a uniformly heated aluminum billet is charged into the aluminum molding extruder 120 at regular intervals, and the shape of the exit of the aluminum molding extruder 120 that pushes the aluminum billet in one direction at high pressure varies according to dies such as round and square shapes. It can be molded.

Finally, the shaped rod-shaped aluminum is cut by the aluminum deoxidizer cutter 130 so that it can be used as a substitute for the deoxidizer standard or the general aluminum ingot, and is used as a substitute for the deoxidizer standard or the general aluminum ingot for storing the cut aluminum scrap. The cooler 140 is further provided to cool the aluminum deoxidizer to be cut so that it can be used. And finally, a packaging machine 150 for wrapping the aluminum product is further provided.

As such, when the above-described process is briefly reviewed, the raw materials loaded for the first time are not only waste aluminum cans but also iron cans and scrap metals, and other nonferrous metals, and plastics, papers, and packing bags are mixed. Before putting this into this process, the front end performs the work such as sack work by hand first, and classifies most of the large foreign matters that are visible. Through the process of automatic screening and grinding, compression, extrusion, etc., it becomes a form of hot and cold extruded products using waste aluminum scrap, which is an aluminum deoxidizer product or other aluminum bar required in the steelmaking process, which is an object of the present invention. It is molded into.

* As described above, the present invention drastically escapes the dissolution process shown in the existing aluminum deoxidizer and the aluminum regeneration process, and can control about 0.5% when hot impurities are extruded into the molded product, and 0.7% when cold. It is a technique for manufacturing aluminum molded articles showing internal and external impurities.

The quality of the aluminum molded product required by the present invention is not less than 95% of aluminum, it has a quality that cannot be used as a structural material or a building material during extrusion molding, but is required for the production of steel alloy deoxidizer and other remeltable aluminum alloy billets. The quality of raw materials can be said to be a good product.

Therefore, when only the waste aluminum can is extruded from the raw material (the first raw material), the components shown in the table below are shown.

Table 1

Si	Fe	Cu	Mn	Mg	Cr	Zn	Pb	Ti	Other	Al
0.50 or less	0.8 or less	0.3 or less	0.8-1.6	0.5-2.8	0.10 or less	0.25	0.03	0.1 or less	0.2	rem.

In addition, in the case of extrusion molding only the waste radiator chip with a raw material (second raw material), the following components are shown.

TABLE 2

Si	Fe	Cu	Mn	Mg	Zn	Ti	Other	Al
0.25 or less	0.40 or less	2.5 or less	0.05 or less	0.05 or less	Less than 0.045	0.03 or less	1.5 or less	96.5 or more

In addition, when only an aluminum processing chip is extrusion-molded from a raw material (third raw material), the following components are shown.

TABLE 3

Si	Fe	Cu	Mn	Mg	Cr	Zn	Ti	Other	Al
0.40-0.8	0.8 or less	0.5 or less	0.15 or less	1.2 or less	0.4 or less	0.25 or less	0.15 or less	0.4 or less	rem.

As such, it is possible to obtain a waste aluminum extrusion molded product exhibiting the above tendency.

Extrusion billet and extrusion material cross-sectional ratio to obtain the product must be 9: 1 or more, as shown in Figures 2 and 3, when having a cross-sectional ratio of less than this, it is possible to maintain the shape of the waste aluminum extrusion material, but The density shows 2.7 or less. In general, since the density of aluminum is 2.7 g / cm 3, the extrusion cross-sectional area ratio for obtaining a preferable waste aluminum extruded material is found to be best when the ratio is 11: 1 or more.

In addition, the aluminum extrusion molding conditions for obtaining these products shows a big difference for each raw material, and in the case of the first raw material, the extrusion conditions are that when the temperature of the green compact billet is cold, and the container and die temperature is 420 ° C. In the case of the second raw material, the extrusion conditions in the case of the second raw material may be cold of the green billet, the container and die temperature of 430 ° C, and the third raw material may be extruded. Under the conditions, the waste aluminum extruded molded article can be obtained by preheating the temperature of the green compact to 430 ° C, performing hot extrusion, and setting the container and die temperature to 480 ° C.

Here, the deoxidizer (deoxidizer, deoxidizing agent) described above,

[1] Solvents that remove oxygen from molten iron and make healthy molten metals are called deoxidizers. Fe-Mn, Fe-Si, Fe-Ti, Fe-Al and Mn, Si, Ti, Al Etc. are mainly used.

[2] In general, when a metal melts it, it absorbs oxygen and other gases in the air and releases them when it solidifies. However, this results in gas holes in the casting and, moreover, oxides that remain vulnerable to the casting. In order to prevent such oxidative damage of metals, some kind of material (deoxidant) is added to the molten metal before it is poured into the mold to release oxygen. In this case, the deoxidizer is combined with O in the molten metal to form an oxide (as a slag ) to remove the harm of oxygen. Used it is various, but for the ferro manganese, ferro-silicon or aluminum, and for copper saengmok (生木) or honeysuckle, ferro manganese, and aluminum, the titanium tetrachloride, Ni for steel such as Mg is used by a deoxidizer.

[Naver Knowledge Encyclopedia] deoxidizer [deoxidizer, deoxidizing agent] (Metal glossary, 01.01.1998, seongandang)

[Description of the code]

10 supply screw device 20 first magnetic separator

30: Aluminum sorter 40: Two-axis shredder

50: aluminum single axis grinder 60: wind power sorter

70: rotary dream magnetic separator 80: aluminum crushed product compactor

90: drying silo 100: aluminum billet maker

110: billet preheating furnace 120: aluminum molding extruder

130: aluminum deoxidizer cutting machine 140: cooler

150: packing machine

Claims

A supply screw device 10 for supplying a mixed product mixed with the collected aluminum cans and iron cans, and scrap generated after processing of general aluminum to one side;

A first magnetic separator 20 for separating the iron can and the iron by magnetic force while the mixed product and the scrap supplied through the feed screw device 10 are transferred through the first transfer conveyor 21;

An aluminum sorter (30) formed at a rear end of the first transport conveyor (21) and sorted into aluminum and nonferrous by eddy currents;

A twin-shaft crusher 40 for crushing the aluminum compressed product introduced from the outside and then transferring it through the third transfer conveyor 41;

Aluminum single-screw crusher 50, the aluminum sorted by the aluminum sorter 30, and the aluminum shredded product crushed in the twin-screw crusher 40 is transferred to the inside through the second conveying conveyor 31 and crushed. Wow;

A wind separator 60 for pulverizing through the aluminum single-screw crusher 50 and selecting the plastics and papers included in the aluminum by wind power during transfer by the fourth transfer conveyor 61;

A rotating drum magnet sorter (70) for selecting magnetic powdered iron from the aluminum passing through the wind separator (60) by magnetic force;

An aluminum crushed compactor (80) for flatly forming aluminum selected through the rotating drum magnetizer (70);

The aluminum squeezed through the aluminum crusher compactor 80 is transported along with the elevator conveyor 81 to be temporarily stored, and then dried. The drying silo 90 transfers the dried aluminum through the fifth transport conveyor 91. )Wow;

An aluminum billet maker 100 for compressing the aluminum transferred through the fifth conveying conveyor 91 at a high pressure;

A billet preheating furnace 110 for charging the aluminum billet manufactured by the aluminum billet maker 100 and then charging 350 to 450 ° C .;

An aluminum molding extruder 120 for extruding the aluminum billet charged in the billet preheating furnace 110 to a predetermined shape and a diameter dimension;

An aluminum deoxidizer cutter 130 for continuously cutting the aluminum deoxidizer extruded by the aluminum molding extruder 120 to a predetermined length;

It comprises a; a cooler 140 for cooling the aluminum deoxidizer cut in the aluminum deoxidizer cutter 130,

In the aluminum sorter (30) is divided into aluminum and non-ferrous sorting, the aluminum is transferred to the aluminum uniaxial crusher 50 through a second transport conveyor 31, the non-ferrous metals through the dust conveyor (32) To the outside,

The waste aluminum can and the aluminum chip, further comprising a discharge chute 71 for collecting and discharging the powdered iron and the plastics and papers selected by the wind separator 60 and the rotary drum magnetic separator 70 into one place. Deoxidant manufacturing method using steel.