Carbon Ferromanganese75
Solvent method is a method of smelting high carbon ferromanganese. In addition to manganese ore and coke, the charge composition also includes lime. During smelting, high alkalinity slag is used to operate the alkalinity, B=1.3-1.4, and sufficient reducing agent is used. Try to reduce the manganese content in the waste residue as much as possible and increase the recovery rate of manganese.
Flux-free method. For manganese-rich ores with high manganese oxide content, ferromanganese can be smelted by the flux-free method.
Ferrosilicon Manganese 75
Lime is not added to the charge during smelting. The equipment and operation are similar to ferrosilicon, and acidic slag is used under the condition of insufficient reducing agent. Operation, the furnace temperature is about 1320-1400 ℃ lower than that of the flux method. Using this method to produce not only qualified high-carbon ferromanganese, but also low-phosphorus, low-iron-rich ferromanganese containing more than 35% manganese for smelting manganese alloys. Manganese slag. The process of smelting high carbon ferromanganese by the solvent-free method is continuous. The charge is continuously added into the furnace along with the melting process. The batch can be composed of 300kg manganese ore, 60~70kg coke, and 15~20kg steel scraps. During solvent-free smelting, the unit power consumption of the product is very low, and it is easy to produce low-silicon high-carbon ferromanganese because most of the silicon is enriched in the slag.
Ferromanganese 75 Alloy
The solvent-less method uses the so-called "weakly acidic slag method" between the solvent method and the solvent-free method. This method is to add an appropriate amount of lime or limestone to the furnace charge to control the ratio of the slag basicity m (CaO)/m (SiO2) or m (CaO+MgO)/m (SiO20) between 0.6-0.8. It can not only improve the recovery rate of manganese, but also obtain slag containing 25% to 30% manganese and an appropriate amount of CaO. This slag can be added into the furnace charge for smelting silicon-manganese alloy, which can save lime and reduce the risk of lime deliquescence. Increase the amount of dust in the charge, thereby improving the air permeability of the charge.
