The Kifuset method was developed in the former Soviet Union. In 1986, the Usti-Kamenno Goske lead smelter, which processes 400-500 tons of furnace charge, was built in Kazakhstan. In 1987, the company was built in Italy. The Westminster Lead Smelter, which processes 600t of charge, produces 80kt of crude lead annually. In 1994, the former QSL furnace of Koming Branch of Canada began to build a 100 kt/a Terrell lead smelter using the Foundation Method and was put into operation in December 1996. The Kiefsett method is a flash smelting method. The Kufseter furnace consists of two reaction zones with partition walls, one side of which is the oxidation reaction zone and the other side is the reduction zone. The oxidation zone is provided with a square reaction tower with a particle size of <1 mm, and the charge containing <1% of water is sprayed from four nozzles arranged at the top of the tower. Under high oxygen and high temperature conditions, it floats floating from top to bottom. Through heat transfer, mass transfer and gas-solid, gas-liquid reaction, the oxidative desulfurization and slagging of the charge are completed. After the molten puddle coke layer material under the reaction column to achieve reduction of the first stage, over 80% of the metal oxide in the lead melt was filtered off. Lead slag furnace reduction zone into the mixture liquid communication, adding coke in an electric furnace, the slag is secondarily lead-zinc oxide reduced under a strong reducing atmosphere, the zinc vapor in the furnace section outlet oxide is zinc oxide, the dust collection Recycling, the gas phase of the Kufsett furnace is separated by a partition wall, and the oxidation section contains high SO2 gas, which is cooled by the waste heat boiler and collected by dust to the acid. The slag and crude lead are released from the outlets at different high levels in the reduction zone. The characteristics of the Kiefset method are as follows: (1) The raw materials are highly adaptable. Raw materials containing 20% ​​to 70% of lead, 13.5% to 28% of sulfur, and 100 to 8000 g/t of silver can be treated by the Kfizer method, and the zinc-containing charge and zinc smelting slag can be processed; (2) The furnace is continuously stable in operation, the furnace is long, and the maintenance cost is saved; (3) The recovery rate of major metals is high, the lead recovery rate can reach 98%, the gold and silver can reach 99%, and the zinc recovery in raw materials can reach more than 60%; (4) The amount of flue gas is small, the concentration of flue gas SO2 is high (30% to 40%), the waste heat boiler and electric dust collection are small, and the heat loss is small; (5) The smoke rate is low, only 5% to 6%; (6) Redox is completed in one furnace, the reaction heat utilization is sufficient, and the heat loss is small, so the energy consumption is very low; (7) The furnace body is sealed, easy to realize automation, mechanization, less fumes and fumes of the furnace body, good operating conditions, labor safety, and good industrial hygiene conditions; (8) The Chifset furnace can process wet zinc slag and recover lead, zinc, silver and indium . The zinc oxide produced by the Chifset furnace can be sent to the zinc smelting system for treatment of lead and zinc, which has advantages for lead and zinc joint ventures. The Kifusett method has many advantages, but the partition wall of the Chifset furnace is hot on both sides, and the lining is corroded faster and often leads to accidents. In addition, when processing high-zinc materials, the clogging of the flue is often caused by the accumulation of zinc oxide soot. HVOF Powder,Chromium Carbide Powder,Chromium Carbide Coating,Chromium Carbide Thermal Spray Powder Luoyang Golden Egret Geotools Co., Ltd , https://www.xtclasercladding.com