The growth of the sponge iron or DRI Industry in India in its nascent form commenced towards the latter half of the 20th century. Until then, steel scrap formed a major chunk of our imports, next only to petroleum products. But India faced a severe foreign exchange crunch and the change in the dollar-rupee parity made scrap imports more difficult. Then the Indian Government imposed curtailment measures and the search for alternative input materials began. Since India is richly endowed with reserves of high-grade iron ore as well as non-coking coal and natural gas from Bombay High, direct reduced iron came under scrutiny. Direct Reduced Iron or sponge iron as it is often referred to, is the substitute for melting scrap in the steel making process. It is a manufactured high ferrous content charge material for iron and steel making. It is produced in lump or pellet form sized typically at 4 by 40 mm. It also comes in compacted and briquette form known as Hot Briquetted Iron (HBI), which is made by hot compacting DRI at temperatures over 650 deg C into a pillow -shaped briquette measuring 110x50x30mm.
展开▼
机译：印度海绵铁或DRI工业的兴起始于20世纪下半叶。在此之前，废钢占我们进口的大部分，仅次于石油产品。但是印度面临严峻的外汇紧缩，美元兑卢比平价的变化使废钢进口更加困难。然后，印度政府实施了削减措施，并开始寻找替代性输入材料。由于印度拥有丰富的高级铁矿石储备以及孟买高地的非炼焦煤和天然气，因此对直接还原铁进行了审查。直接还原铁或海绵铁通常被称为炼钢过程中熔化废钢的替代品。它是一种用于钢铁制造的高铁含量装料。它以块状或丸状形式生产，尺寸通常为4 x 40 mm。它也以压实和压块的形式出现，称为热压块铁（HBI），它是通过在650摄氏度以上的温度下将DRI热压成尺寸为110x50x30mm的枕形压块而制成的。
展开▼
