CN100439538C - Process of producing iron alloy with low carbon and manganese - Google Patents

Abstract

The invention discloses a preparing craft of low-micro carbon manganese-iron alloy, which comprises the following steps: 1) loading high carbon manganese-iron into medium-frequency induction furnace; melting; heating-up at above 1600 deg.c; pouring into tank; 2) transferring the tank to station; air refining; 3) taking-up oxygen gun; inserting argon oxygen gun into solution liquid level 300-400mm of tank; setting the discharge of oxygen at 300-500 L/min; blowing at 3-8 min with argon oxygen ratio at 1 : 3; blowing at 3-8 min with argon oxygen ratio at 1 : 2; blowing at 3-8 min with argon oxygen ratio at 1 : 1; adding into silicon iron; 4) hanging the tank to casting position; casting; getting the product. The good effect of this invention is: simple producing craft; high productive efficiency; low power; good environment; low cost.

Description

The production technique of iron alloy with low carbon and manganese

Technical field

The present invention relates to a kind of production technique of iron alloy with low carbon and manganese.

Background technology

At present the production technique of iron alloy with low carbon and manganese has three kinds, is smelted by raw ore for first kind, not only is subjected to the restriction of Mineral resources, and need two hot stove duplexs in ore deposit to produce, it mixes and dashes and need repeatedly carry out, and the recovery rate of manganese is lower, and production environment is relatively poor, seriously polluted, product power consumption height, the production cost height, the quantity of slag of generation is big, manganic oxide content is higher in the slag, and this technology is subjected to the restriction of national industrial policies; Second kind is electrolytic process production, this method complex process, and seriously polluted energy consumption is big, and the cost height also is subjected to the restriction of national industrial policies.

Summary of the invention

It is little to the purpose of this invention is to provide a kind of pollution, and energy consumption is little, the production technique of the iron alloy with low carbon and manganese of constant product quality

The objective of the invention is to realize in the following way: its technology is:

1), high carbon ferromanganese is packed in the medium-frequency induction furnace, fusing is warming up to more than 1600 ℃, pours in the tank body;

2), tank body is moved into station, at jar mouth dress dust excluding hood, open dedusting fan, insert oxygen gun blowing in jar, the oxygen rifle inserts the argon pipe apart from liquid level 400-800mm at the bottom of jar, Argon, argon blowing rate be controlled at the 30-100 liter/minute; Elder generation's low oxygen pressure blowing, oxygen blast pressure 0.6 ± 0.05MPa blew 2-4 minute, and oxygen blast pressure is risen to 0.8 ± 0.05MPa, added lime simultaneously, observed a jar mouthful flame, after flame shrinks, continued blowing 4-8 minute;

3), take out the oxygen rifle, argon oxygen rifle is inserted tank body liquation level 300-400mm, oxygen flow be the 300-500 liter/minute, press earlier argon oxygen than blowing in 1: 3 3-8 minute, press argon oxygen again than blowing in 1: 2 3-8 minute, press argon oxygen then, add ferrosilicon simultaneously than blowing in 1: 1 3-8 minute;

4), tank body is winched to the cast of cast position, finished product.

The present invention has following beneficial effect, and the one, production technique is simplified greatly, and the particularly introducing of argon oxygen blowing technology makes blowing technology become and can produce iron alloy with low carbon and manganese by producing the mid-carbon fe-mn alloy; The 2nd, production efficiency improves, and the LAVOD stove hourly output of ton nominal capacity can reach 1 ton of production capacity, can improve 1.5-3 doubly than traditional technology; The 3rd, energy consumption is low, and the products production power consumption is lower than the 900kwh/ ton; The 4th, production environment is good, and water of productive use is recirculated water entirely, and refining process waste gas is all by dust removal process, and no noxious gas emission produces a small amount of waste residue, and is nontoxic; The 5th, production cost reduces greatly, because the reduction of power consumption, the raising of production efficiency, Mn in the slag ₂O ₃Loss less than 1%, product cost per ton can reduce about 1000 yuan; The 6th, good quality of product, because the bottom blowing rare gas element reduces the gas content in the alloy, inclusion is effectively removed, the alloy that this method is produced has higher cleanliness factor and low gas content, helps the production of Clean Steel.

Embodiment

The present invention will be further described below in conjunction with embodiment:

The equipment configuration: 1, the 1000Kg medium-frequency induction furnace is one; 2, the heat size ratio is 0.85, liner magnesia fire-protecting wall, one of the 1500Kg capacity tank body of bottom installation gas permeable brick; 3, blowing is overlapped with Lavalle type spray gun and elevator one thereof; 4,12m ³The liquid oxygen jar is joined 10m ³Gasifying pot and supply air line and Controlling System one cover; 5,8m ³The liquid argon jar is joined 5m ³Gasifying pot and supply air line and Controlling System one cover; 6, telescoping top blast insert argon oxygen rifle and elevator one cover thereof; 7, charging system one cover; 8, sack cleaner one cover; 9, the finishing crusher is one.

Embodiment 1:

The production technique of little carbon-manganese alloy:

Embodiment:

The production of little carbon-manganese alloy:

1), weighing 1100Kg high carbon ferromanganese packs in the medium-frequency induction furnace of 1000Kg, fusing is warming up to more than 1600 ℃, pours in the tank body;

2), the tank body that will fill the high carbon ferromanganese liquation moves into LAVOD stove blowing station, at jar mouth dress dust excluding hood, opens the bag-type dust blower fan, in jar, insert Lavalle type oxygen blowing lance oxygen blast, the oxygen rifle inserts argon pipe Argon apart from liquid level 400-800mm at the bottom of jar, argon blowing rate is controlled at 50 liters/minute; Elder generation's low oxygen pressure blowing, oxygen blast pressure 0.6MPa blew after 3 minutes, and oxygen blast pressure is risen to the 0.8MPa blowing, added 150-300Kg lime simultaneously, observed a jar mouthful flame, after flame shrinks, continued blowing 5 minutes;

3), take out the oxygen rifle, Lavalle type spray argon oxygen rifle is inserted in the tank body liquation, the degree of depth is 300mm, oxygen flow be the 300-500 liter/minute, press earlier argon oxygen than blowing in 1: 35 minutes, press argon oxygen again than blowing in 1: 25 minutes, press argon oxygen then, add the manganese that ferrosilicon is used for reducing slag simultaneously than blowing in 1: 15 minutes;

4), tank body is winched to cast position cast, ingot bar is become the finished product of certain particle size with the finishing of finishing crusher, packing is put in storage.

Claims (1)

1, a kind of production technique of iron alloy with low carbon and manganese, its technology is:

1), high carbon ferromanganese is packed in the medium-frequency induction furnace, fusing is warming up to more than 1600 ℃, pours in the tank body;

2), tank body is moved into station, at jar mouth dress dust excluding hood, open dedusting fan, insert oxygen gun blowing in jar, the oxygen rifle inserts the argon pipe apart from liquid level 400-800mm at the bottom of jar, Argon, argon blowing rate be controlled at the 30-100 liter/minute; Elder generation's low oxygen pressure blowing, oxygen blast pressure 0.6 ± 0.05MPa blew 2-4 minute, and oxygen blast pressure is risen to 0.8 ± 0.05MPa, added lime simultaneously, observed a jar mouthful flame, after flame shrinks, continued blowing 4-8 minute;

3), take out the oxygen rifle, argon oxygen rifle is inserted tank body liquation level 300-400mm, oxygen flow be the 300-500 liter/minute, press earlier argon oxygen than blowing in 1: 3 3-8 minute, press argon oxygen again than blowing in 1: 2 3-8 minute, press argon oxygen then, add ferrosilicon simultaneously than blowing in 1: 1 3-8 minute;

4), tank body is winched to the cast of cast position, finished product.