Restore Overview iron powder :
　Reduced iron from the iron oxide is generally under high heat conditions to restore the flow of hydrogen or carbon monoxide is generated in the gas stream , the main component of loose structure of elemental iron. Since the reduced iron powder itself , and the microstructure is loose coupled , so the maximum surface area . In chemical production and laboratory operations commonly used for high- reducing agent.
　Because of reduced iron is easily oxidized , it must be crushed graded protective gas in the state were generally want to be crushed by JZDB nitrogen ultrafine grinding machine grading grading grading when ultrafine grinding , iron if you just want to restore high- precision grading simply by JZDF nitrogen grader can.
　Also sold in the market as a hot pack , the structure of the two bags, the outer layer of airtight packaging, the inner layer is a breathable pouches filled with reduced iron powder , just open the outer packaging when using the air enter , reduced iron reacts with oxygen to produce heat immediately , the temperature can be maintained at about 45 degrees for up to four hours long. Its principle is easy to take advantage of the characteristics of reduced iron and oxidant reactions.

Principle and Application of reduced iron:
　In high school chemistry curriculum on reduced iron powder commonly used equations are ( PEP high and one of the first books < metals and their compounds> ) :
　3Fe +4 H2O (g) = heat = Fe3O4 +4 H2
　Reduced iron is the use of solid or gaseous popular reductant ( coke , charcoal, anthracite, water, gas, natural gas conversion , decomposition of ammonia , hydrogen , etc. ) reduction of iron oxide ( iron ore, rolled steel scales , etc. ) from the system spongy iron. Reduction process is divided into ( solid carbon reduction ) a reduction and secondary reduction, a reduction of carbon reduction from the system is solid sponge iron , a reduction of the main processes are: ( iron ore, rolled steel scales , etc. ) → drying → magnetic crushing and screening → → → → canning into a reduction furnace → sponge . Secondary fine reduction process: sponge brush clearance → → → crushing → magnetic powder block secondary reduction furnace → → → Magnetic crushing and screening → → → mixing → Packaging → grading finished . Produced by reduction of iron of high quality , standard parameters , Fe ≥ 98%, C ≤ 0.01%, phosphorus and sulfur are less than 0.03% , the hydrogen loss was 0.1 to 0.2 %.

The main purpose of the reduction of iron :
　Reduced iron powder metallurgy products , this sector consumes 60% to 80% reduction of total iron . Welding with reduced iron powder , 10 to 70% iron in the coating can be improved welding electrode and significantly improve the deposition efficiency . Chemical use reduction iron powder , mainly used in chemical catalysts, precious metal restore, adding alloy , copper , such as replacement . Cutting stainless steel iron , steel products during cutting to oxygen - acetylene flame spray iron , can improve cutting performance , expanding the scope of cutting steel to improve the thickness can be cut . Continuous improvement of the powder metallurgy industry and technology, is currently widely used in powder metallurgy parts and aircraft , firearms , motorcycles, family cars , automotive , agricultural , mining , power tools , machine tools, transportation and other machinery industries.

Application of reduced iron machine: