固定炭：70-85%;

水(shuǐ)份：≤10% max;

灰份：≤5% max;

發熱量：6500-8000大(dà)卡；

燃燒時(shí)間(jiān)：2小(xiǎo)時(shí)以上(shàng)；

粒度：≥3厘米;

木炭與焦炭熔煉的生(shēng)鐵(tiě)，即使化學組成相同，其結構與機械性質仍不相同。木炭冶煉的生(shēng)鐵(tiě)一般具有(yǒu)細粒結構，鑄件緊密，沒有(yǒu)裂紋的特點，用木炭生(shēng)産的生(shēng)鐵(tiě)含雜質少(shǎo)，适于生(shēng)産優質鋼。由于木炭具有(yǒu)還(hái)原性，所以在冶金工業可(kě)以用來(lái)還(hái)原礦石冶煉金屬。在有(yǒu)色金屬生(shēng)産中，木炭常用作(zuò)表面助熔劑，當有(yǒu)色金屬熔融時(shí)，表面助熔劑在熔融金屬表面形成保護層，使金屬與氣體(tǐ)介質分開(kāi)，既可(kě)減少(shǎo)熔融金屬的飛濺損失，又可(kě)降低(dī)熔融物中氣體(tǐ)的飽和(hé)度。大(dà)量木炭還(hái)用于結晶矽生(shēng)産，生(shēng)産結晶矽用的木炭不應含有(yǒu)生(shēng)炭頭和(hé)過多(duō)的灰分。

Fixed carbon content: 70-85%;   

Water content: 10% max;      

Ash content: 5% max;  

Calorific value: 6500-8000 calories;  

Burning time: more than 2 hours;   

Size: 3 cm min;  

The structure and mechanical properties of pig iron melted from woods charcoal and coke are different even though the chemical composition is the same. Pig iron smelted bywoods charcoal has fine grain structure, compact castings and no cracks. Pig iron produced by woods charcoal contains less impurities and is suitable for producing high quality steel. Because woods charcoal is reducible, it can be used to reduce ores and smelt metals in metallurgical industry. In the production of non-ferrous metals, woods charcoal is often used as surface flux. When non-ferrous metals melt, surface flux forms a protective layer on the molten metal surface, separating the metal from the gas medium, which can not only reduce the splash loss of molten metal, but also reduce the gas saturation in the molten metal. A large amount of charcoal is also used in the production of crystalline silicon. The charcoal used in the production of crystalline silicon should not contain carbon head and excessive ash.