At present, the production of low-carbon ferromanganese alloys is usually made by smelting high-silicon silico-manganese alloys and manganese ore under high alkalinity conditions in a refining electric arc furnace. This process requires large equipment investment, high power consumption, shortage of manganese ore resources and high prices, so the product cost is relatively high, and the pollution generated is large, which is not good for environmental protection. It uses 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.
The technical solution adopted by the present invention to solve its technical problem is: use an induction melting furnace to produce
Production of low-carbon ferromanganese alloy:
a. Put the metallic manganese into the induction melting furnace and energize to melt it into a liquid state;
b. After adding scrap steel to the metal manganese solution to melt, remove the slag, the added amount of the scrap steel is 5-30% of the mass of the metal manganese; or add scrap steel and the medium carbon manganese carbon iron alloy to the metal manganese solution after melting, remove the slag , The addition of the medium carbon ferromanganese alloy is 40-83% of the mass of metallic manganese;
c. After the alloy solution in the ladle is cooled, the alloy block is lifted out and crushed to form the block shape required by the customer. Or add silico-manganese to the ladle, pour the alloy solution in the induction melting furnace into the ladle to melt the silico-manganese, the added amount of the silico-manganese alloy is 5-20% of the mass of metallic manganese; make the alloy solution in the ladle After cooling, the alloy block is lifted out and crushed to form the block shape required by the customer.
The preferred embodiment is that the amount of scrap steel added is 8-18% of the mass of metallic manganese. Or the added amount of scrap steel is 5-25% of the mass of metallic manganese, the added amount of silico-manganese alloy is 5-15% of the mass of metallic manganese, and the silico-manganese alloy contains 17% silicon and 65% manganese. Or the added amount of scrap steel is 10-20% of the mass of metallic manganese, the added amount of silico-manganese alloy is 5-20% of the mass of metallic manganese, and the silico-manganese alloy contains 17% silicon and 65% manganese. Or the added amount of scrap steel is 9-30% of the mass of metallic manganese, the added amount of the medium-carbon ferromanganese alloy is 40-83% of the mass of metallic manganese, and the medium-carbon ferromanganese alloy contains 2.5% silicon and 75% manganese, Carbon content is less than 2%. The exit temperature of the alloy in the induction melting furnace is controlled at 1400-1600°C.
The beneficial effect of the present invention is that the production investment of this process is less, the main elements are more than 10% higher than that of electric arc furnace smelting, the process is easy to control, and it can produce a variety of grades of low-carbon manganese alloys, especially it can produce traditional electric arc furnaces. Low-carbon ferromanganese with ultra-low carbon content that cannot be produced.
Detailed ways
1. Use induction melting furnace to produce low-carbon ferromanganese alloy (such as FeMn85C) according to the following steps:
a. Put the metallic manganese into the induction melting furnace and energize to melt it into a liquid state;
b. After adding scrap steel into the metal manganese solution to melt, remove the slag; the added amount of scrap steel is 8-18% of the mass of metal manganese.
c. After the alloy solution in the ladle is cooled to a solid state, the alloy block is lifted out and crushed to form a customer
The lumpy required. The temperature of the alloy in the induction melting furnace is controlled at 1400-1600°C.
2. Use induction melting furnace to produce low-carbon ferromanganese alloy (such as FeMn80C) according to the following steps:
a. Put the metallic manganese into the induction melting furnace and energize to melt it into a liquid state;
b. After adding scrap steel into the metal manganese solution to melt, remove the slag; the amount of scrap steel added is metal manganese
5-25% of the quality,
c. Add silico-manganese to the ladle, pour the alloy solution in the induction melting furnace into the ladle to melt the silico-manganese; the added amount of the silico-manganese alloy is 5-15% of the mass of metal manganese, and the silico-manganese alloy contains silicon 17%, containing manganese
65%.
d. After the alloy solution in the ladle is cooled to a solid state, the alloy block is lifted out and crushed to form a block required by the customer. The temperature of the alloy in the induction melting furnace is controlled at 1400-1600°C.
3. Use induction melting furnace to produce low-carbon ferromanganese alloy (such as FeMn80C) according to the following steps:
a. Put the metal manganese into the induction melting furnace and melt it into a liquid state
b. After adding scrap steel into the metal manganese solution to melt, remove the slag; the amount of scrap steel added is metal manganese
10-28% of the quality.
c. Add silico-manganese to the ladle, pour the alloy solution in the induction melting furnace into the ladle to melt the silico-manganese;
The amount of silico-manganese alloy added is 5-20% of the mass of metallic manganese, and the silico-manganese alloy contains 17% silicon and manganese
65%.
d. After the alloy solution in the ladle is cooled to a solid state, the alloy block is lifted out and crushed to form customer requirements
Seeking blocky. The temperature of the alloy in the induction melting furnace is controlled at 1400-1600°C.
4. Use induction melting furnace to produce low-carbon ferromanganese alloy (such as FeMn78C) according to the following steps:
a. Put the metallic manganese into the induction melting furnace and energize to melt it into a liquid state;
b. After adding scrap steel and medium carbon manganese carbon iron alloy into the metal manganese solution to melt, remove the slag; scrap steel
The addition amount of the medium carbon ferromanganese alloy is 9-30% of the mass of metal manganese, and the addition amount of the medium carbon ferromanganese alloy is 40-83Yo of the mass of metal manganese. The medium carbon ferromanganese alloy contains 2.5% silicon, 75% manganese, and less than carbon. 2%.
c. After the alloy solution in the ladle is cooled to a solid state, the alloy block is lifted out and crushed to form customer requirements
Seeking blocky. The temperature of the alloy in the induction melting furnace is controlled at 1400-1600°C.
The stripped slag can be used to smelt silico-manganese alloy.
