12500kVA High Carbon Ferrochrome Furnace Technical Scheme

• Shell Diameter: Φ7500mm
• Shell Height: 4400mm
• Inside Diam: Φ5900mm
• Furnace Depth: 2400mm
• Transport Package: Wooden Box
• Trademark: Jinrong
• Origin: Wooden Box

Product Description

Process description: Chromium ore, silica, coke and other qualified raw materials are transported into the factory by truck through the weighbridge, respectively stored in the corresponding raw material storage yard, the loader will be loaded into the distribution bin, all kinds of raw materials according to the smelting formula requirements, and fall to the mixing belt machine, and then transported to the main plant with a large Angle belt machine on the third floor platform, through the ground rail type cloth truck to add to the top of the bunker. The charge enters the semi-closed high-carbon ferrochrome furnace through the feeding tube, and the 33KV power supply is fed into the furnace by the transformer through the three-phase electrode. The electrode transmits to the furnace filled with the charge by generating arc heat between the charge and the charge. Through arc heat and resistance heat, the mixture of chromium ore, silica stone and coke can be reduced to high-carbon ferrochrome. During the entire smelting process, the voltage level and current intensity on the electrode are set according to the smelting process parameters, and the values of voltage and current are different in different periods, that is, the power in the input furnace is different, the electrode is always firmly inserted in the furnace, and the gas escapes evenly from the entire material surface. The arc is not exposed from beginning to end, the mixed charge is added to the furnace in small batch with the drop of the material surface, so that the material surface in the furnace is maintained at a certain height, and the shape of a flat cone is displayed around the electrode. When the hot metal reduced to high carbon chromium iron in the furnace is stored to a certain extent, the furnace eye is opened with a hanging eye opener, the hot metal and the slag liquid are released into the water-cooled calm basin through the chute, and the slag iron is fully separated. The upper slag liquid flows to the side Huangsha pit and is transported by loader after cooling. The high carbon ferrochrome alloy liquid at the bottom of the calming basin flows into the two ingot molds at the back, is slightly cooled and pry up, and is transported to the alloy box by the truck or loader to the finishing area. Under the prescribed power supply system, the electric furnace produces iron once at an average interval of 3 hours, 7 ~ 9 furnaces a day, and the iron output is about 10 ~ 13t. High carbon ferrochrome furnace each iron sampling analysis once, each sample analysis is required to provide the results of the furnace length and furnace front within 1 hour. Smelting and pouring are three shifts, and the annual operation days are 330 days.
The flue gas produced by the electric furnace smelting enters the dust removal flue through the chimney, and the flue gas produced by the electric furnace iron discharge enters the dust removal flue through the top suction hood and flue. The bag type dust collector is arranged on the outside of the plant. The dust emission concentration after treatment reaches the emission standard stipulated by the state. The circulating cooling water of the electric furnace is supplied by the circulating water pump station. After cooling the cooling water into the electric furnace, the cooling water is naturally returned to the cooling pool by using the drop. After cooling in the pool, the water is supplied to the front of the furnace by the pump.