Technical field

    The invention relates to a method for producing low-carbon ferromanganese alloy by using intermediate frequency furnace remelting.

Background technique

    At present, the production of low-carbon ferromanganese alloys is usually carried out by using high-silicon silicon-manganese alloys and

Imported manganese ore is smelted under high alkalinity conditions. This process requires large equipment investment, high power consumption, and manganese ore

The resources are scarce and the price is high, so the product cost is high and the pollution generated is large, which is not conducive to environmental protection. it

Using graphite electrodes, it is easy to increase carbon during the smelting process in the furnace, and it is difficult to produce carbon containing 0.2% low carbon

Ferromanganese.

Summary of the invention

    The purpose of the present invention is to provide a low-carbon investment, easy process control, can produce a variety of brands of low carbon

The method of producing low-carbon ferromanganese alloy by using intermediate frequency furnace remelting of manganese alloy.

    The technical solution adopted by the present invention to solve its technical problems is to use the intermediate frequency furnace to produce

Production of low-carbon ferromanganese alloys:

    a . Put the manganese metal into the intermediate frequency furnace and melt it into a liquid state when energized;

    b . After adding scrap steel into the metal manganese solution to dissolve, remove the slag, the amount of scrap steel added is

5-30% of the quality of manganese ; or after adding scrap steel and medium carbon manganese carbon iron alloy into the metal manganese solution to melt,

Remove the slag, the amount of the medium carbon ferromanganese alloy is 40-83% of the quality of metal manganese ;

    c . After cooling the alloy solution in the ladle, the alloy block is lifted and broken to form the customer's requirements

Blocky. Or add silicon manganese into the ladle and pour the alloy solution in the intermediate frequency furnace into the ladle to melt the silicon manganese

The amount of the silicon-manganese alloy added is 5-20% of the quality of the metal manganese ; the alloy solution in the ladle is cooled

Afterwards, the alloy block was hoisted out and crushed to form a block required by the customer.

    The preferred embodiment is: the amount of scrap added is 8-18% of the mass of metal manganese . Or the addition of scrap

The amount is 5-25% of the quality of metal manganese , and the addition of silicon-manganese alloy is 5-15% of the quality of metal manganese .

The manganese alloy contains 17% silicon and 65% manganese . Or the amount of scrap added is 10-20% of the quality of metal manganese ,

The amount of silicon manganese alloy added is 5-20% of the quality of metal manganese , the silicon manganese alloy contains 17% of silicon , containing manganese

65% . Or the amount of scrap added is 9-30% of the quality of metal manganese , and the amount of medium carbon ferromanganese alloy is metal

40-83% of the quality of manganese , the medium-carbon ferromanganese alloy contains 2.5% silicon , 75% manganese , and less than 2% carbon .

The outlet temperature of the alloy in the intermediate frequency furnace is controlled at 1400-1600 ℃.

    The beneficial effect of the present invention is that the investment in the production of this process is less, and the main element is smelted and recovered more than the electric arc furnace

Above lOcYo , the process is easy to control, and can produce a variety of low-carbon manganese alloys, especially it can produce

It produces low-carbon ferromanganese with ultra-low carbon content that cannot be produced by traditional electric arc furnaces.

    detailed description

    Example 1 , using an intermediate frequency furnace to produce low-carbon ferromanganese alloy (such as FeMn85C , :) according to the following steps :

    a . Put the manganese metal into the intermediate frequency furnace and melt it into a liquid state when energized;

    b . After adding scrap steel to the metal manganese solution to melt, remove the slag; the amount of scrap steel added is metal manganese

8-18% of quality .

    c . After the alloy solution in the ladle is cooled to a solid state, the alloy block is lifted and broken to form a customer

Blocky required. Control the temperature of the alloy in the intermediate frequency furnace at 1400-1600 ℃.

    Example 2 , the use of intermediate frequency furnace to produce low-carbon ferromanganese alloy ( such as FeMn80C . Chuan,

FeMn84Co . 3) :

    a . Put the manganese metal into the intermediate frequency furnace and melt it into a liquid state when energized;

    b . After adding scrap steel to the metal manganese solution to melt, remove the slag; the amount of scrap steel added is metal manganese

5-25% of quality ,

    c . Add silicon manganese into the ladle, pour the alloy solution in the intermediate frequency furnace into the ladle to melt the silicon manganese;

The amount of silicon-manganese alloy added is 5-15% of the mass of metal manganese , and the silicon-manganese alloy contains 17% silicon and manganese.

65% .

    d . After the alloy solution in the ladle is cooled and solidified, the alloy block is hoisted out and broken to form a customer

Seeking blocky. Control the temperature of the alloy in the intermediate frequency furnace at 1400-1600 ℃.

    Example 4 , the use of intermediate frequency furnace to produce low-carbon ferromanganese alloy (such as FeMn80C ...) according to the following steps :

Put the manganese metal into the intermediate frequency furnace, melt it into a liquid state by electricity

b . After adding scrap steel to the metal manganese solution to melt, remove the slag; the amount of scrap steel added is metal manganese

10-28% of quality .

    c . Add silicon manganese into the ladle, pour the alloy solution in the intermediate frequency furnace into the ladle to melt the silicon manganese;

The amount of silicon manganese alloy added is 5-20% of the quality of metal manganese , the silicon manganese alloy contains 17% of silicon , containing manganese

65% .

    d . After the alloy solution in the ladle is cooled and solidified, the alloy block is hoisted out and broken to form a customer

Seeking blocky. Control the temperature of the alloy in the intermediate frequency furnace at 1400-1600 ℃.

    Example 4 , using a low-carbon ferro-manganese IF furnace according to the following production steps ( such as FeMn78C .¨,

FeMn78Cl . . ) :

    a . Put the manganese metal into the intermediate frequency furnace and melt it into a liquid state when energized;

    b . After adding scrap steel and medium-carbon manganese-carbon-iron alloy into the metal manganese solution to dissolve, remove the slag; scrap steel

The amount of addition is 9-30% of the quality of metal manganese, the amount of medium carbon ferromanganese alloy is the quality of metal manganese

40-83Yo , the medium carbon ferromanganese alloy contains 2.5% silicon , 75% manganese , and less than 2% carbon .

    c . After the alloy solution in the ladle is cooled and solidified, the alloy block is hoisted out and broken to form a customer

Seeking blocky. Control the temperature of the alloy in the intermediate frequency furnace at 1400-1600 ℃.

    The stripped slag can be used for smelting silicon-manganese alloy.