印度带式球团改造项目建议.docx

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1、Dear Mr. Chen:As discussed with your over the telephone, we need to work on the following two modificationsin Iron Fines Pellet Plants. We have two Pellet Plants in our Barbil Location of Odisha. The plant is of dry grinding, with a recuperationtype of straight grate technology.如电话讨论，我们想要对现有的铁粉球团项目进

2、行改造。我们有两个球团 厂，该厂为干法磨粉，采用带式焙烧技术。我们希望进行如下两点改造：1. To increase the Cold compressive strength of Pellets to 280-300. Currently, it is varying from 230-300.提高球团的冷抗压强度至280-300。目前，这个数字在230300之间。Z将建Iil啊玲区强廖丛耳翦附QaQQN理直至犯灯QQN2After making Pellets, the green pellets are then fed to the induration machine. Strai

3、ght grates dry the pellets out in a drying section, then bring the pellets up to a temperature of about 800-900 oCin a preheat zone, then finish the induration process at roughly 1200-1350 . The pellets are then cooled to a suitable temperature for transporting to a load-out facility.制成球团后，球团被送入烧结机。

4、在干燥区直接烘干球团，然后在预热区 将球团加热到大约800-900oC,然后在大约1200-1350C完成硬化烧结过程。 球团被冷却到合适的温度，然后运送到装载设备。Our idea is to inject any of the reducing gas (Syn gas, COG, etc.) in Grate Cooler where the reduction process can take place and the Pellet can covert to Sponge Iron (DRI) in the Pellet Plant. Hence further there wil

5、l be no need for DRI plant to make DRI separately. We are thinking to combine both the processes; PalIetisation and reduction process in Pellet Plant Only.我们的想法是将还原性气体(合成气、焦炉煤气等)注入到带式冷却器中， 在冷却段发生还原反应，球团可以直接转化为海绵铁(DRI)。如此，将不需要单 独生产直接还原铁DRL我们正在考虑把这两个过程结合起来，在球团烧结机 里实现球团和还原工艺。Please look into and arrang

6、e a detailed discussion with the experts on above both points.请您就上述两个问题与专家进行深入研究并安排具体讨论会。In addition to our above in point no -1, the reason for not getting the desired CCS may be due to the temperature difference between the top and bottom layers of bed height. If we can make anyarrangement to fix/

7、install above the travelling grate which can mix the bed material so that it will bake the pellets uniformly and we could get the desired CCS. This is our idea on the same. You may please work out the other options with reference to point no-1.关于第一点，未能得到所需的冷抗压强度的原因可能是由于料层顶部和底 部之间的温度差异。如果我们能在移动炉排上安装一

8、个装置，使料层混合，使 球团烘烤均匀，我们就能得到所需的强度。这是我们的想法。请看看是否有更 好的办法。The detail mentioned in Point no 2 is a new concept which we want to develop.第二点是我们的新想法，请看看是否可以？直接还原铁的生产和冷却的合理化建议Suggestions of Production and cooling of DRI特别说明：以下文字中，若发生中英文有歧义者，以中文为准。Special note: in case of any discrepancy between Chinese and En

9、glish, the Chinese version shall prevail.1）在球团厂的球团冷却过程直接生产DRI是可行的，但是不宜直接将还原 性气体（合成气、焦炉煤气等）注入到带式冷却器中，因为合成气、焦炉煤气等 内部含有CO有毒气体，带式冷却器冷却还原过程将泄漏，造成安全隐患；1） It is feasible to produce DRI directly in pellet cooling process of pelletizing plant. Howeve it is not suitable to directly inject reducing gas （syngas

10、, coke oven gas, etc.） into the straight line type cooler. Because synthetic gas and coke oven gas contain CO Toxic gas inside, the cooling reduction process ofstraight line type cooler will leak, resulting in potential safety hazard.2）建议重新设计建造“竖式还原炉”一一与带式球团矿焙烧机互相对应， 用“合成气、焦炉煤气等”注入到“竖式还原炉”，既冷却了球团矿，又

11、使得球 团矿发生直接还原成DRI,这方面我公司有实力帮助贵公司完成该任务；2）It is suggested to redesign and build vertical reduction furnace- corresponding to straight line type pellet machine, Injecting syngas, coke oven gas, etc. into the vertical reduction furnace not only cools the pellets, but also directly reduces the pellets to

12、dri. In this regard, our company has the strength to help your company complete the task.3）为了达到第二点想法，请贵公司提供下列资料：3.1） 球团矿生产能力；3.2） 球团矿的化学全分析，特别要提供TFe、Feo两个成分；3.3） 带式焙烧机出炉的球团矿温度；3.4） 可以提供的还原气种类与供给能力，以及其化学全分析；3.5） DRI目标金属化率。3) In order to achieve the second idea, please provide the following informatio

13、n：3.1) Pellet production capacity;3.2) Total Fe and FeO, and other chemical analysis of pellets;3.3) the Pellet temperature at the outlet of the straight line type pellet Calciner machine;3.4) the name reducing gas, and supply capacity of that can be provided, as well as its total chemical analysis;3.5) The target metallization rate of DRI.