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.