Introduction of reduced iron powder

Reduced iron powder by ferroferric oxide commonly under the condition of high temperature on hydrogen flow or carbon monoxide reduction in gas generated, main ingredients for the loose structure of elemental iron. Because of reduced iron powder for powder itself, coupled with its microstructure is very loose, so its surface area is great. In the chemical production and laboratory operations often used as a reductant. Reduced iron powder because of easy oxidation, therefore to crush classification must be under the state of shielding gas, typically for superfine grinding is used when grading JZDB crushing classifier for superfine grinding classification nitrogen protection, if only to high precision of reduced iron powder grading JZDF nitrogen protection classifier can be used simply.

Iron powder was made of iron particles aggregation. Color: black. Is the main raw material of powder metallurgy. According to the granularity, customarily divided into coarse, medium, fine powder, fine powder and ultrafine powder five grade coarse powder, medium powder, fine powder, fine powder and ultrafine powder five levels.

Reduced iron powder characteristics

Reduced iron powder and iron powder, the difference is that reducing iron powder is made from high temperature hydrogen reduction iron trioxide, particularly strong reducibility, nature is very lively, powder easily spontaneous combustion in air, belong to the dangerous goods, it is often said that "flint"; Ordinary iron powder is elemental iron powder.

Reduced iron powder is the use of solid or gaseous reductant (coke, charcoal, anthracite, water gas and conversion of natural gas, decomposition of ammonia, hydrogen, etc.) of reduced iron oxide (iron concentrate, rolled steel scale, etc.) for producing sponge iron. Reduction process is divided into carbon reduction (solid) reduction and secondary reduction at a time, a reduction is solid carbon reduction for making sponge iron, a reduction is the main process: (iron concentrate, the rolling steel scale, etc.) - drying - magnetic separation to crushing, screening and canning to enter a reduction furnace, sponge iron. Secondary fine reduction process: sponge iron to flush, the broken - magnetic separation - the second reduction furnace - powder block - solution broken - magnetic separation to sieving, grading to mixing, packaging and finished products. In the production of high quality iron powder by reduction method, the various parameters, Fe 98% or higher, 0.01% or less of carbon, phosphorus and sulfur is less than 0.03%, the hydrogen loss of 0.1 ~ 0.2%.

Reduced iron powder used

1, as the raw material of powder metallurgy products, iron powder consumption accounted for about 60 ~ 80% of total consumption;

2, as the electrode materials, add 10-70% in coated iron powder can improve the electrode welding process and significantly improve the deposition efficiency;

3, as injection agent of flame cutting, after cutting products, to the oxygen - acetylene flame spray iron powder, can improve the cutting performance, expand the scope of the cutting just kind of increase can be cutting thickness;

4, also can be used as a reducing agent in organic chemical synthesis, duplicator ink vehicle, etc.

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