KR20110113223A

KR20110113223A - The method of manufacture for iron lump of iron dust used plasma

Info

Publication number: KR20110113223A
Application number: KR1020100032474A
Authority: KR
Inventors: 정정철
Original assignee: 정정철
Priority date: 2010-04-09
Filing date: 2010-04-09
Publication date: 2011-10-17

Abstract

The present invention relates to a method for manufacturing iron ingots using plasma, wherein only the outside is oxidized and rusted and pure iron inside such as shot dust, iron scale, bearing abrasive dust, etc. After melting with plasma flame to make iron melt, discharge it through the outlet of the lower part of the plasma furnace and transfer the iron melt to the movable caterpillar forming mold installed at the bottom of the outlet. The present invention relates to a method for manufacturing iron dust of iron dust using plasma having excellent economical efficiency that can be dropped and collected and manufactured into iron ingot.

Plasma, steel bars, short dust, plasma torch, caterpillar, forming mold,

Description

The method of manufacture for iron lump of iron dust used plasma}

The present invention relates to a method for manufacturing iron ingots using plasma, wherein the iron dust, which is oxidized only in the outside and the iron component is preserved in the inside, is graphite together with graphite, and a part of the iron oxide contained in the iron dust is graphite. Simple and economical to convert low-priced iron dust into expensive iron ingots by reducing them into pure iron by reducing the molten iron melt made with pure iron and melting together with the internal iron components in a plurality of forming molds installed in a movable caterpillar. Is to provide this outstanding technology

In order to recover iron by melting and reducing iron dust in the furnace in iron or steelmaking, it must be manufactured by using a bracket after bonding with organic and inorganic adhesives such as molasses, starch, bentonite, cement, etc., because the height of the furnace is high, If iron dust is injected as it is inside the furnace, iron dust is blown to the upper part of the furnace due to the high temperature of the air in the furnace, and even if some reaches the bottom of the furnace, it is slugized in the state of iron oxide before being melted and reduced so that it cannot be recovered as pure iron. Therefore, there is a disadvantage in that the bracketing costs are high when the iron dust is recovered from the furnace without being broken and broken in the furnace, and the iron dust is recovered from the furnace. .

On the other hand, in small cupola furnaces and sintering furnaces, some iron dust is mixed to recover the iron in the recovery of iron by melting the scrap metal, and coke, anthracite coal, bituminous coal, etc. are frequently used to recover iron and to supply iron. In some cases, these materials burn and emit a lot of harmful gases such as carbon dioxide and sulfuric acid gas to pollute the environment.In order to recover iron with iron dust alone, iron dust must be bracketed, resulting in cost loss. .

In addition, many methods of waste melting using plasma, in which harmful wastes such as incineration ash or asbestos, etc., are used as plasma flames to make harmless glass crystals have been resumed. Since there is no technology to directly manufacture a molten melt as a product because it is a suppressing technology, the melt is simply put into water to make vitrified beads, and then, there is a disadvantage that it can only be used as a raw material in the manufacture of civil engineering materials such as road rovans or bricks.

The present invention is to solve and solve the above problems,

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing iron ingots using iron plasma which minimizes the generation of harmful gases due to the combustion of carbon sources such as coal or coke and minimizes the occurrence of slag by rapidly melting iron dust with a high temperature plasma flame. have.

Another object of the present invention is to add a small amount of graphite to the iron dust to lower the melting point of the iron dust to reduce the consumption of electricity due to plasma melting, and the carbon component constituting the graphite combined with oxygen in the iron oxide partially present in the iron dust The carbon monoxide is generated by carbon monoxide and carbon dioxide to increase the net iron recovery rate, and the generated carbon monoxide is made into a reducing atmosphere inside the plasma melting furnace to reduce nitrogen oxides while combining with oxygen of nitrogen oxides generated by oxidizing air at high temperatures in the furnace. The present invention provides a method for producing iron ingots of iron dust using an environmentally friendly plasma that removes harmful gases.

Still another object of the present invention is that the molten iron melted in the plasma melting furnace is discharged to the outlet of the lower part of the melting furnace is filled in the movable caterpillar forming mold in the lower portion of the outlet, and then naturally cooled while being transported in the caterpillar forming mold dropping from the mold The present invention provides a method for producing iron ingots of iron dust using plasma, which is easily manufactured and operated.

According to the present invention for achieving the above object, in the method of manufacturing iron dust using plasma, each storage hopper for storing iron dust and graphite, a conveying conveyor at the bottom of each storage hopper, the conveying conveyer An input equipment unit comprising an input pusher for inputting the iron dust and graphite which have been made into the melting furnace; A melting furnace providing a place where the injected iron dust and graphite are melted, a plasma torch penetrating the ceiling of the melting furnace to form a hot plasma flame inside the melting furnace, an iron melt outlet for discharging the molten melt to the outside of the melting furnace; A melting facility unit having a slug melt outlet; A melt processing facility comprising a slug melting facility having a plurality of forming molds provided on a caterpillar so that the discharged iron melt is formed into a steel ingot and a water tank for glass-beading the molten slug; An exhaust gas treatment facility comprising a cooling facility for cooling the high-temperature exhaust gas generated during melting and an air pollution prevention facility for removing harmful substances from the cooled exhaust gas; It is to provide a method for producing iron ingots of iron dust using a plasma.

According to the method for producing iron dust using plasma according to the present invention, the amount of exhaust gas generated is lower than that of melting iron using fossil fuel by rapidly melting iron dust using high temperature plasma flame. It provides an environmentally friendly iron dust melting environment and can be melted as it is without forming the iron dust, so the processing process is simple and economical effect.

In addition, the present invention can be prepared by injecting the molten iron melt in the mold to the natural ingot in the cooling state is excellent in convenience.

Hereinafter, with reference to the drawings will be described in detail. However, these drawings are for illustrative purposes only and the present invention is not limited thereto.

1 is a system configuration of a method for producing iron ingots of iron dust using a plasma according to an embodiment of the present invention.

Referring to FIG. 1, a system constructed by a method for manufacturing iron dust using plasma according to an embodiment of the present invention is largely equipped with an input facility unit 100, a melting facility unit 200, a melt processing facility unit 300, and an exhaust gas. It is configured to include a gas treatment facility (400).

The input equipment unit 100 has an iron dust storage hopper 101 for storing the imported iron dust and a graphite storage hopper 102 for storing graphite, and an iron dust transfer conveyor 103 under each storage hopper 101, 102. And a graphite conveying conveyor 104, the outlets 105 and 106 of each of the kenbearers 103 and 104 are positioned above the inlet 108 above the inlet pusher 107 so that the conveyed material is simultaneously introduced into the inlet 108. The input pusher 107 is arranged to be injected and is configured to push the graphite and iron dust introduced into the injection hole 108 into the melting furnace 201 while moving forward and backward by the hydraulic cylinder 109.

The melting apparatus 200 passes through the melting furnace 201 and the ceiling 202 of the melting furnace 201, which is a place for melting the injected iron dust and graphite, to generate a plasma flame 203 inside the melting furnace 201 ( 204 and two melt outlets 206 and 207 for discharging the molten melt 205 to the outside of the melting furnace 201, and the heavy melt of the melt 205 is the lower bottom 208 of the melting furnace 201. The slug melt discharged through the iron melt outlet 206 installed in the furnace and having a light specific gravity in the melt 205 is a slug melt outlet 207 installed in the side wall 209 of the melting furnace 201 located higher than the iron melt outlet 206. The melt outlets 206 and 207 having different heights are provided to discharge through the melt, so that the melt 205 is separated and discharged according to specific gravity.

The interior of the furnace 201 is constructed with a thick refractory brick 211 to protect the outer casing 210 of the furnace 201 from the high temperature plasma flame 203 and the high temperature melt 205, the plasma torch 204 ) Has an air inlet 212 in the center of the plasma torch 204 to form the plasma flame 203 and the plasma flame (according to the amount of iron dust and graphite introduced into the melting furnace 201 and the melt thickness of the melt 205). The plasma torch 204 driving device 213 is attached to the outside of the melting furnace 201 to adjust the length and the direction of the plasma flame 203.

Meanwhile, a copper receiving plate 214 is mounted on the bottom 208 of the melting furnace 201 to receive strong electrons generated from the plasma torch 204.

The melt processing facility 300 is divided into an iron melt processing facility 301 and a slug melt processing facility 302. The heavy melt in the melt 205 is discharged to the outside of the melting furnace 201 through the iron melt outlet 206 installed in the bottom 208 of the melting furnace 201, the endless track 303 below the iron melt outlet 206 When a plurality of forming molds 304 installed in a flow state is filled in a liquid state and the forming mold 304 is slowly moved by the caterpillar 303, the iron melt filled in the forming mold 304 gradually hardens while being naturally cooled to form iron bars ( Heavy steel bars 305 are collected at the bottom with their own weight when the mold 304 is returned from the upper track 306 to the lower track 307 by the rotation of the caterpillar 303 after turning to 305.

Meanwhile, the slug melt having a low specific gravity in the melt 205 is discharged to the outside of the melting furnace 201 through the slug melt outlet 207 installed in the side wall 209 of the melting furnace 201, and the discharged slug melt is the slug melt outlet 207. As it falls to the water tank 308 installed at the bottom and quenching by water in the water tank 308, the hot melt explodes in the water to generate a large amount of water vapor, and the silicon component in the slug vitrifies with other foreign matters, thereby forming a small vitrification. Bead 309. The beads 309 are recovered and used as raw materials for civil engineering or road flooring.

Exhaust gas treatment unit 400 is a facility for processing the exhaust gas generated when melting the iron dust, when the iron dust from the melting furnace 201 to the plasma flame 203 in the iron dust or foreign matter contained in the iron dust is burned In order to generate the combustion gas and the plasma flame 203, the external air injected into the melting furnace 201 from the air inlet 212 at the center of the plasma torch 204 is about 100 ° C. due to the high temperature atmosphere inside the melting furnace 201. The generated high-temperature exhaust gas is introduced into the cooler 402 at the rear stage through the gas outlet 401 installed on the melting furnace 201 and the exhaust gas cooled to 40 ° C. or lower prevents air pollution at the rear stage. Contaminants are removed from the facility 403 and discharged to the atmosphere through the blower 404.

Meanwhile, the air pollution prevention facility 403 may be selected and used in a cleaning dust collector or a filter dust collector according to the type of foreign matter contained in the iron dust.

As such, those skilled in the art to which the present invention pertains will understand that the present invention may be implemented in other specific forms without changing the technical spirit or essential features.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1 is a block diagram of a method for producing iron ingots of iron dust using a plasma according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: input equipment 101: iron dust storage hopper

102: graphite storage hopper 103: iron dust conveying conveyor

104: graphite conveying conveyor 105: iron dust conveying conveyor outlet

106: graphite conveying conveyor outlet 108: input pusher

109: hydraulic cylinder 200: melting facility

201: melting furnace 202: ceiling

203: plasma flame 204: plasma torch

205: melt 206: iron melt outlet

207: slug melt outlet 208: bottom

209: wall 210: casing

211: refractory brick 212: air inlet

213: drive unit 214: power receiving plate

300: melt processing equipment unit 301: iron melt processing equipment

302: slug melt processing equipment 303: caterpillar

304: forming mold 305: ingot

306: Upper track 307: Lower track

400: exhaust gas treatment facility portion 401: gas discharge port

402: cooler 403: air pollution prevention facility

404: blower

Claims

In the iron ingot manufacturing method using plasma,

An input equipment unit comprising a storage hopper for storing iron dust and graphite raw materials, a conveyor for transferring the raw materials, and an input fuser for simultaneously feeding the raw materials into a melting furnace;

A melting furnace configured to melt the raw materials with a plasma flame, a plasma torch installed through the upper portion of the melting furnace, and two melt outlets formed at a lower side and a side of the melting furnace so that the melt can be separated and discharged with a specific gravity difference;

Sludge melt with sludge melt which is formed by receiving a plurality of forming molds receiving iron melt discharged to the lower part of the melting furnace from the melt and placed on the track, and a water tank for glass beading the slug melt discharged to the side of the melting furnace outlet of the melt. A melt processing facility unit configured of a processing facility;

An exhaust gas treatment facility unit configured to connect a cooler for cooling the exhaust gas generated in the melting furnace, an air pollution prevention facility, and a blower;

Ingot manufacturing method of iron dust using a plasma comprising a.

The method of claim 1,

The raw material is iron iron, graphite or iron dust using only iron dust, characterized in that the iron ingot manufacturing method using plasma, characterized in that the raw material.

The method of claim 1,

The plasma torch manufacturing method of iron dust using plasma, characterized in that the drive is mounted to the outside so that the flame direction, position adjustment.

The method of claim 1,

The two melt outlets are installed at different heights at the bottom of the melting furnace and the side of the melting furnace to separate and discharge the melt with a specific gravity difference.