(1) Preheating and pre reduction of furnace materials. When a 40000 KVA closed ferromanganese electric furnace in a Japanese factory produces high carbon ferromanganese, the furnace charge is preheated and pre reduced by passing through a Rotary kiln with a diameter of 3.5 m and a length of 75 m, and the iron oxide scale and lime are dried to remove Water of crystallization. When the furnace charge temperature reaches 80 C, the furnace charge is put into the furnace. The heat source of Rotary kiln comes from the gas of closed electric furnace. After adopting this method, the production efficiency of the electric furnace has been greatly improved, and the power consumption has been reduced to 2000kWh/t.
(2) Production of high carbon ferromanganese using residue retention method. The characteristic of this process is to use slag resistance heat instead of arc heat, promoting the expansion of the reaction zone in the furnace, achieving the goal of reducing power consumption, improving element recovery rate, and production capacity.
(3) By using electronic computer control technology, the carbon content can be controlled, electrodes can be adjusted, data can be stored, and the batch weighing system and feeding transportation system can be controlled to stabilize the electric furnace operation, reduce power consumption (up to an average of 12%), increase the working time of silicon manganese alloy powder, and extend the service life of the furnace. Currently, it has been widely adopted by various countries.
(1) Preheating and pre reduction of furnace materials. When a 40000 KVA closed ferromanganese electric furnace in a Japanese factory produces high carbon ferromanganese, the furnace charge is preheated and pre reduced by passing through a Rotary kiln with a diameter of 3.5 m and a length of 75 m, and the iron oxide scale and lime are dried to remove Water of crystallization. When the furnace charge temperature reaches 80 C, the furnace charge is put into the furnace. The heat source of Rotary kiln comes from the gas of closed electric furnace. After adopting this method, the production efficiency of the electric furnace has been greatly improved, and the power consumption has been reduced to 2000kWh/t.
(2) Production of high carbon ferromanganese using residue retention method. The characteristic of this process is to use slag resistance heat instead of arc heat, promoting the expansion of the reaction zone in the furnace, achieving the goal of reducing power consumption, improving element recovery rate, and production capacity.
(3) By using electronic computer control technology, the carbon content can be controlled, electrodes can be adjusted, data can be stored, and the batch weighing system and feeding transportation system can be controlled to stabilize the electric furnace operation, reduce power consumption (up to an average of 12%), increase operation time, and extend the service life of the furnace. Currently, it has been widely adopted by various countries.
