current ferro chrome prices
Among chromium ore resources, lump ore only accounts for 20% of the total, and the remaining 80% is fine ore. A considerable part of chromium ore is friable ore, which is easily broken into fine particles during mining and storage. Even high-strength lumps produce large amounts of fine powder during processing. Direct input of fine ore into the furnace will not only cause a large amount of useful elements to be lost with the slag and furnace gas, but will also directly threaten the operational safety of the electric furnace. In addition, a large amount of dust generated during the production process also requires agglomeration treatment.
ferro chrome alloy
Roasting process: Raw ores usually contain large amounts of high-priced oxides, combined water, carbonates and sulfides. Roasting is the process of dehydration, decomposition, oxidation and reduction of ore under appropriate temperature and atmosphere conditions, and improves the physical properties and chemical composition of the ore entering the furnace.
ferrochromium price
Sintering process: Sintering is a process that uses the melting of the ore or the solid-solid reaction between the ore and the roasting agent to produce a liquid phase to moisten and bond the ore particles, and form a porous sinter with sufficient strength after cooling. The sintering process is the process of reducing the surface energy of a substance. Powdered ore has a higher degree of dispersion and its specific surface area is larger than lump ore of the same mass. The surface area of the sintered mineral decreases, and the free energy ΔG of the system decreases. This is a spontaneous process.
