Ferrophosphorus is obtained from the production of a phosphorus electric furnace. It is a coexisting compound with a phosphorus content of 20-28% and a silicon content of 0.1-6%, capable of alterin...
Description of Ferrophosphorus
Ferrophosphorus is obtained from the production of a phosphorus electric furnace. It is a coexisting compound with a phosphorus content of 20-28% and a silicon content of 0.1-6%, capable of altering the corrosion resistance and chip performance of steel. Ferrophosphorus is used in the steel refining industry as an alloying agent and can also be used to produce phosphate compounds. In China, there are two varieties of ferrophosphorus produced: FeP1 and FeP2, both containing 15-20% phosphorus.
Specification of Ferrophosphorus
Packaging: Ton bags
Note: The chemical composition, granularity, and packaging of the above products can be customized according to customer requirements.
production of ferrophosphorus
The production of ferrophosphorus involves the high-temperature carbon reduction of phosphate rock. Silicon stone is added to produce calcium silicate. The addition of steel scrap reduces the original phosphate rock to produce Fe2P. Some of the phosphorus volatilizes into the furnace gas. Yellow phosphorus is produced without adding steel scrap, but ferrophosphorus contains a small amount of iron, leading to the production of a small amount of ferrophosphorus. The primary component of phosphate rock is Ca3(PO4)2, which forms slag with SiO2 at high temperatures. The raw materials for smelting ferrophosphorus include phosphate rock (P2O5 > 25%, SiO2 > 7%, CaO < 50%; with lumps smaller than 5mm not exceeding 20%), coke (fixed carbon > 78%, volatile matter < 4%, ash content < 14%; lumps of 3-15mm), silicon stone (SiO2 > 96%; lumps of 5-40mm), and steel scrap (Fe > 93%; coil length <100mm).
The equipment for producing ferrophosphorus consists of an electric furnace and a phosphorus recovery system. The electric furnace is a closed submerged arc reduction electric furnace. The furnace cover is constructed using high-alumina bricks or refractory concrete, with a carbon brick lining inside. Graphite electrodes are used, and the gaps between the electrode holes and the electrodes on the furnace cover are sealed with water or sand to ensure that the electrodes can move freely while preventing the escape of furnace gases.
The phosphorus recovery system comprises three scrubbing towers, collecting troughs, and a phosphorus collection trough. The uniformly mixed charge materials continuously enter the furnace from the top charging bin and descend as they melt. Molten iron and slag are periodically discharged, flowing into the slag-iron separation pool next to the furnace. Iron settles in the lower part of the separation pool, and the slag flows into the water-quenching trough and is quenched with water at a pressure of 0.3MPa. After the molten iron is released through a small hole at the bottom, it flows into an iron mold coated with white ash. Once it cools to a dark red color, the entire Ferrophosphorus block is removed from the mold and further cooled to room temperature. After crushing and refinement, Ferrophosphorus is obtained. The furnace gas at approximately 300°C enters the cooling and scrubbing towers for initial purification.
LSFerroalloy is a leading supplier of ferrophosphorus alloy. The appearance of ferrophosphorus can be processed into ferrophosphorus lumps, ferrophosphorus granules, or ferrophosphorus powders according to customer requirements. We can provide the ex-factory price of ferrophosphorus.
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