国内厂家直销一次还原铁粉和二次还原铁粉吴总为你讲述之间的区别
一次：直接还原法生产生铁 二次：熔融还原法生产生铁 （一）直接还原法生产生铁 直接还原法是指在低于熔化温度之下将铁矿石还原成海绵铁的炼铁生产过程，其产品为直接还原铁（即DRI），也称海绵铁。
A: direct reduction method of the production of pig iron second: smelting reduction method of the production of pig iron (a) direct reduction process to produce pig iron direct reduction method is in below their melting temperature will iron ore reduced to sponge iron in iron making process and its products for direct reduced iron (DRI), also known as sponge iron.
还原性铁粉通俗的讲就是用还原方法制取的铁粉.又叫还原铁粉一种活性很强的铁粉，因为具有较强的还原性，很容易发生氧化反应，甚至在空气中稍稍加热就会燃烧，因为它的这种特性，经常用于焊接铁轨、化工还原、防止氧化变质等。制取的化学方程式是Fe3O4+4H2=3Fe+4H2O ，也就是磁铁矿与氢气发生氧化还原反应，生成水和还原性铁粉。还原法就是利用固体或气体还原剂（焦炭、木炭、无烟煤、水煤气、转化天然气、分解氨、氢等）还原铁的氧化物(铁精矿、轧钢铁鳞等)来制取海绵状的铁。还原过程中分为（固体碳还原）一次还原和二次还原一次还原就是固体碳还原制取海绵铁，一次还原主要流程是：(铁精矿、轧钢铁鳞等)→烘干→磁选→粉碎→筛分→装罐→进入一次还原炉→海绵铁二次精还原流程:海绵铁→清刷→破碎→磁选→二次还原炉→粉块→解碎→磁选→筛分→分级→混料→包装→成品用还原发所生产的优质铁粉，各项参数达标，Fe≥98%，碳≤0.01％，磷和硫都小于0.03％，氢损为0.1～0.2％。还原铁粉的主要用途有 ：粉末冶金制品还原铁粉，此行业耗用还原铁粉总量的60%~80% 电焊条用还原铁粉，在药皮中加入10～70％铁粉可改进焊条的焊接工艺并显著提高熔敷效率化工用还原铁粉，主要用于化工催化剂，贵金属还原，合金添加，铜置换等切割不锈钢铁粉，在切割钢制品时，向氧-乙炔焰中喷射铁粉,可改善切割性能，扩大切割钢种的范围，提高可切割厚度我国粉末冶金行业技术的不断提高，目前粉末冶金零件广泛应用与飞机，枪械，摩托车，家庭轿车，汽车，农机，矿山，电动工具，机床，运输等各种机械行业，随着我国经济的飞速发展，还原铁粉用量在逐年上涨。
Reduced iron powder popular speak is to use method for preparing iron powder reduction. Also called reduced iron powder a very strong activity of iron, because with a strong reduction, is prone to oxidation reaction, even in the air a little heat will burn. Because of it, is often used in rail welding, chemical reduction, prevent oxidation and deterioration. The chemical formula is Fe3O4+4H2=3Fe+4H2O, that is, magnetite and hydrogen oxidation reduction reaction, the formation of water and reduction of iron powder. Reduction method is the use of solid or gaseous reducing agent (coke, charcoal, anthracite, water gas, transformation of natural gas, decomposition of ammonia, hydrogen) reduction of iron oxide (iron concentrate, rolling iron scale, etc.) to produce sponge iron. The mixture solution of fine secondary reduction process (solid carbon reduction) a reduction and secondary reduction time reduction is solid carbon reduction to produce sponge iron, a reduction of the main process is: (iron concentrate, rolling iron scale), drying, magnetic separation, crushing, screening, canning, into a reduction furnace, sponge iron reduction process: sponge iron, cleaning, crushing, magnetic separation, secondary reduction furnace, powder block, fragmentation, separation, screening, classification, and packaging to obtain the finished product by reducing the production of high-quality iron, the parameters were met, Fe is equal to or more than 98%, the carbon is less than or equal to 0.01%, phosphorus and sulfur is less than 0.03%, the hydrogen loss of 0.1 ~ 0.2%. The main purposes are: reduction of iron powder reduced iron powder metallurgy products, the industry consumption reduction of iron total 60%~80% welding wire with reduced iron powder, adding 10 ~ 70% iron welding process can improve the electrode and improve the deposition efficiency of chemical reduction of iron in medicine in the skin, is mainly used for chemical catalysts, noble metal reduction, alloy add copper replacement cutting stainless steel iron, in cutting steel products, iron powder injection to the oxygen acetylene flame, can improve the cutting performance, expand the scope of cutting steel, improve the cutting thickness of powder metallurgy technology in China continues to improve, and the current aircraft, powder metallurgy parts widely used firearms, motorcycle, household car, automobile, agricultural machinery, mining, electric tools, machine tools, transportation and other machinery industry, with the rapid development of China's economy, reduction of iron powder Quantity increases year by year.