红土镍矿湿法冶炼立项建设可行性研究论证报告.doc

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1、children inside it, covering them with all the clothes she could find. During the night, it got terribly cold. The woman kept as near as she could to the children and even tried to get into the case herself, but it was too small. Early ,next morning she heard planes passing overhead and wondered how

2、 she could send a signal. Then she had an idea. She stamped out the letters SOS in the snow. Fortunately, a pilot saw the signal and sent a message by radio to the nearest town. It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash.Lesson76 April Fools D

3、ay 愚人节To end our special news bulletin, said the voice of the television announcer, we are taking you to the macaroni fields of Calabria. Macaroni has been grown in this area for over six hundred years. Two of the leading growers, Giuseppe Moldova and Ricardo Brabante, tell me that they have been ex

4、pecting a splendid crop this year and harvesting has begun earlier than usual. Here you can see two workers who, between them, have just finished cutting three cart-loads of golden brownmacaroni stalks. The whole village has been working day and night gathering and threshing this years crop before t

5、he September rains. On the right, you can see Mrs Brabante herself. She has been helping her husband for thirty years now. Mrs Brabante is talking to the manager of the local factory where the crop is processed. This last scene shows you what will happen at the end of the harvest : the famous Calabr

6、ian macaroni-eating competition ! Signor Fratelli, the present champion, has won it every year since 1961. And that ends our special bulletin for today, Thursday, April 1st. We are now returning you to the studio.Lesson77 A successful operation 一例成功的手术The mummy of an Egyptian woman who died in 800 B

7、.C. has just had an operation. The mummy is that of Shepenmut who was once a singer in the Temple of Thebes. As there were strange marks on the X-ray plates taken of the mummy, doctors have been trying to find out whether the woman died of a rare disease. The only way to do this was to operate. The

8、operation, which lasted for over four hours, proved to be very difficult because of the hard resin which covered the skin. The doctors removed a section of the mummy and sent it to a laboratory. They also found something which the X-ray of the god Duamutef. This god which has the head of a cow was n

9、ormally placedinside a mummy. The doctors have not yet decided how the woman died. They feared that the mummy would fall to pieces when they cut it open, but fortunately this has not happened. The mummy successfully survived the operation. Lesson78 The last one? 最后一枝吗？After reading an article entitl

10、ed Cigarette Smoking and Your Health I lit a cigarette to calm my nerves. I smoked with concentration and pleasure as I was sure that this would be my last cigarette. For a whole week I did not smoke at all and during this time, my wife suffered terribly. I had all the usual symptoms of someone givi

11、ng up smoking: a bad temper and an enormous appetite. My friends kept on offering me cigarettes and cigars. They made no effort to hide their amusement whenever I produced a packet of sweets from my pocket. After seven days of this I went to a party. Everybody around me was smoking and I felt extrem

12、ely uncomfortable. When my old friend Brian urged me to accept a cigarette, it was more than I could bear. I took one guiltily, lit it and smoked with satisfaction. My wife was delighted that things had returned to normal once more. Anyway, as Brian pointed out, it is the easiest thing in the world

13、to give up smoking. He himself has done it lots of times! Lesson79 By air 乘飞机I used to travel by air a great deal when I was a boy. My parents, used to live in South America and I used to fly there from Europe in the holidays. An airhostess would take charge of me and I never had an unpleasant exper

14、ience. I am used to travelling by air and only on one occasion have I ever felt frightened. After taking off, we were flying low over the city and slowly gaining height, when the plane suddenly turned round and flew back to the airport. While we were waiting to land, an air-hostess told us to keep c

15、alm and to get off the plane quietly as soon as it had touched down. Everybody on board was worried and we were curious to find out what had happened. Later we learnt that there was a very important person on board. The police had been told that a bomb had been planted on the plane. After we had lan

16、ded, the plane was searched thoroughly. Fortunately, nothing was found and five hours later we were able to take off again.Lesson80 The Crystal Palace 水晶宫Perhaps the most extraordinary building of the nineteenth century was the Crystal Palace, which was built in Hyde Park for the Great Exhibition of

17、 1851. The Crystal Palace was different from all other buildings in the world, for it was made of iron and glass. It was one of the biggest buildings of all time and a lot of people from many countries came to see it. A great many goods were sent to the exhibition from various parts of the world. Th

18、ere was also a great deal of machinery on display. The most wonderful piece of machinery on show was Nasmyths steam hammer. Though in those days, travelling was not as easy as it is today, steam boats carried thousands of visitors across the Channel from Europe. On arriving in England, they were tak

19、en to the Crystal Palace by train. There were six million visitors in all, and the profits from the exhibition were used to build museums and colleges. Later, the Crystal Palace was moved to South London. It remained one of the most famous buildings in the world until it was burnt down in 1936.Lesso

20、n81 Escape 脱逃When he had killed the guard, the prisoner of war quickly dragged him into the bushes. Working rapidly in the darkness, he soon changed into the dead mans clothes. Now, dressed in a blue uniform and with a rifle over his shoulder, the prisoner marched boldly up and down in front of the

21、camp. He could hear shouting in the camp itself. Lights were blazing and men were running here and there: they had just discovered that a prisoner had escaped. At that moment, a large black car with four officers inside it, stopped at the camp gates. The officers got out and the prisoner stood to at

22、tention and saluted as they passed. When they had gone, the driver of the car came towards him. The man obviously wanted to talk. He was rather elderly with grey hair and clear blue eyes. The prisoner felt sorry for him, but there was nothing else he could do. As the man came near, the prisoner knoc

23、ked him to the ground with a sharp blow. Then, jumping into the car, he drove off as quickly as he could. Lesson82 Monster or fish? 是妖还是鱼？Fishermen and sailors sometimes claim to have seen monsters in the sea. Though people have often laughed at stories told by seamen, it is now known that many of t

24、hese monsters which have at times been sighted are simply strange fish. Occasionally, unusual creatures are washed to the shore, but they are rarely caught out at sea. Some time ago, however, a peculiar fish was caught near Madagascar. A small fishing-boat was carried miles out to sea by the powerfu

25、l fish as it pulled on the line. Realizing that this was no ordinary fish, the fisherman made every effort not to damage it in any way. When it was eventually brought to shore, it was found to be over thirteen feet long. It had a head like a horse, big blue eyes, shining silver skin, and a bright re

26、d tail, The fish, which has since been sent to a museum where it is being examined by a scientist, is called an oarfish. Such creatures have rarely been seen alive by man as they live at a depth of six hundred feet.Lesson83 After the elections 大选之后The former Prime Minister, Mr Wentworth Lane, was de

27、feated in the recent elections. He is now retiring from political life and has gone abroad. My friend, Crawley, has always been a fanatical opponent of Mr Lanes Radical Progressive Party. After the elections, Crawley went to the former Prime Ministers house. When he asked if Mr Lane lived there, the

28、 policeman on duty told him that since his defeat, the ex-Prime Minister had gone abroad. On the following day, Crawley went to the house again. The same policeman was just walking slowly past the entrance, when Crawley asked the same question. Though a little suspicious this time, the policeman gav

29、e him the same answer. The day after, Crawley went to the house once more and asked exactly the same question. This time, the policeman lost his temper. I told you yesterday and the day before yesterday, he shouted, Mr Lane was defeated in the elections. He has retired from political life and gone t

30、o live abroad ! I know, answered Crawley, but I love to hear you say it ! Lesson84 On strike 罢工Busmen have decided to go on strike next week. The strike is due to begin on Tuesday. No one knows how long it will last. The busmen have stated that the strike will continue until general agreement is rea

31、ched about pay and working conditions. Most people believe that the strike will last for at least a week. Many owners of private cars are going to offer free rides to people on their way to work. This will relieve pressure on the trains to some extent. Meanwhile, a number of university students have

32、 volunteered to drive buses while the strike lasts. All the young men are expert drivers, but before they drive any of the buses, they will have to pass a special test. The students are going to take the test in two days time. Even so, people are going to find it difficult to get to work. But so far

33、, the public has expressed its gratitude to the students in letters to the Press. Only one or two people have objected that the students will drive too fast!Lesson85 Never too old to learn 活到老学到老I have just received a letter from my old school informing me that my former head- master, Mr Regmald Pag

34、e, will be retiring next week. Pupils of the school, old and new, will be sending him a present to mark the occasion. All those who have contributed towards the gift will sign their names in a large album which will be sent to the headmasters home. We shall all remember Mr Page for his patience and

35、understanding and for the kindly encouragement he gave us when we went so unwillingly to school. A great many former pupils will be attending a farewell dinner in his honour next Thursday. It is a curious coincidence that the day before his retirement, Mr Page will have been teaching for a total of

36、forty years. After he has retired, he will devote himself to gardening. For him, this will be an entirely new hobby. But this does not matter, for, as he has often remarked, one is never too old to learn. Lesson86 Out of control 失控As the man tried to swing the speed-boat round, the steering-wheel ca

37、me away in his hands. He waved desperately to his companion, who had been water-skiing for the last fifteen minutes. Both men had hardly had time to realize what was happening when they were thrown violent1y into the sea. The speed-boat had struck a buoy, but it continued to move very quickly across

38、 the water. Both men had just begun to swim towards the shore. when they noticed with dismay that the21.5万吨/年红土镍矿湿法冶炼项目可行性分析2010年4月25日目录一、概况二、建设规模及厂址的选择三、产品方案四、原料来源五、工艺流程六、三废治理和环境保护七、投资估算八、销售收入、生产成本及损益测算一、 概况全球陆基镍储量约为12000万吨，其中40%为硫化矿，60%为氧化矿（红土矿），硫化矿主要分布在俄罗斯、加拿大和中国，总量约5000万吨，目前镍产量的60%来自硫化矿。硫化矿资源经过多

39、年开采，资源已逐渐枯竭，最近十多年未见有发现大型硫化镍矿的报道，为满足世界经济发展对镍的需求，普遍已将目光转向开发红土矿型镍资源。红土矿资源的特点：1）资源丰富，埋藏浅，易勘探，均为露天开采，采矿成本低。2）伴生钴含量高，钴可以分摊部分镍成本。 3）红土矿产于热带、亚热带、大多濒临海洋，交通运输方便。发达国家依靠雄厚资金，先进技术和国际经营经验，在国际矿业全球化的竞争中已先走一步。目前国外的许多知名镍生产企业都已涉足红土矿开发，部分已取得了实质性进展。例如鹰桥公司与BHP公司合作开发的印度尼西亚含镍红土矿项目， Inco公司在印尼以及新喀里多尼亚开发的红土矿项目等。由于硫化镍可供开发资源的明显

40、减少，世界未来十年镍产量的增加将主要来源于红土型镍矿资源的开发，而红土型镍矿资源开发中，湿法技术发展趋势大于铁镍火法冶炼技术；虽然湿法技术与红土型镍矿的火法冶炼厂的投资成本大体相当，即年生产能力每磅镍812美元。但是随着湿法技术的日趋成熟、设备制造技术的进步和规模的扩大，湿法镍厂在下一轮兴建或扩建项目中，其基建投资将会明显下降；湿法工艺的生产成本在一般情况下低于铁镍流程，加上湿法耗能明显低于铁镍流程。因此，在经济上，湿法技术将显示出其优越性；国内目前处理红土镍矿大部分都是采用火法生产镍铁或镍铬合金，但最近已有三个常压酸浸的项目投产，其中广西银亿科技矿冶有限公司（年产5000吨电积镍，300吨碳

41、酸钴）运营状况较好，正在扩建二期5000吨/年项目，并且配套建设从废水中提取镁盐产品的生产线。二、 建设规模及厂址选择国内外红土镍矿湿法冶炼单项目的镍产量规模大多在3万吨以下，国际上比较著名的如古巴毛阿湾的规模3万吨/年；尼加罗切格瓦那2.3万吨/年；澳大利亚的雅布鲁3万吨/年；澳大利亚布隆0.9万吨/年；考斯0.9万吨/年；澳大利亚的莫林莫林的设计规模4.5万吨/年（实际产能3.5万吨/年），国内广西银亿和江西江锂的设计产能5000吨/年，云南元江设计能力为3000吨/年。目前广西银亿正在进行技术改造将现有产能扩大到10000吨。江西江锂也有计划新建1.5万吨/年的项目。结合江铜的实际情况，

42、并考虑红土镍矿资源的供应现状，拟将建设规模定为21.5万吨/年金属镍，同时配套建设230万吨/年硫铁矿循环经济项目，可以为湿法冶炼提供硫酸、蒸汽及电力。红土镍矿湿法冶炼生产耗水耗酸量大、用地多及物流量大，必需依赖大容量物流通道，为降低企业成本、打造核心竞争力，项目的选址需要考虑的主要因素有：主要原材料（硫酸、石灰和红土镍矿）的物流成本、物流吞吐量、可就近选址建设尾矿库堆存酸浸废渣、工业基础设施完备等。经过考察和调研，我们认为瑞昌市码头镇工业园建设条件相对较好，主要情况如下：1、土地供应充裕。工业城规划面积有78平方公里，目前工业城内暂无大的企业进驻，能够预留数千亩土地，工业城内路域平阔，岸坡平

43、缓，平整量小，可满足园区集约化和可持续发展要求。2、区位交通便捷。境内105、316国道与九景高速、昌九高速、赣粤高速、沪蓉高速和杭瑞高速交织贯通，公路交通优势明显；铁路货运站白杨站、夏畈站距工业城分别只有14公里、7公里；长江岸线全长19.5公里，主航道深泓线紧贴南岸，为双向航道，属长江一级主航道，常年适应2000吨级以上船舶作业，最大停泊能力为万吨级海轮，境外矿石可由江海联运直达专用码头，物流成本较低。相对于把建设地址选在德兴铜矿做了物流成本对比（见表1） 3、供水、供电、运输、能源等基础设施完备。工业城内规划建设有220KV和110KV的变电站各一座，其中工业城110KV变电站已开工建设

44、，预计可在2010年10月竣工，西气东输二线线路经过工业城，接口距建设地点约34公里，并在工业城内预留接口。4、工业园位置距江铜武山铜矿尾矿库只有约10公里，便于酸浸废渣的堆存，可不必新建尾矿库，节约投资。5、项目所需的石灰资源丰富。6、园区内水泥产能较大，可适当消化生产过程中产生的废渣。7、硫铁矿循环经济项目及江铜九江铅锌冶炼项目建成后可提供项目所需的硫酸。三、产品方案根据国内目前的红土镍矿冶炼技术进展和环保要求，拟采用常压children inside it, covering them with all the clothes she could find. During the nig

45、ht, it got terribly cold. The woman kept as near as she could to the children and even tried to get into the case herself, but it was too small. Early ,next morning she heard planes passing overhead and wondered how she could send a signal. Then she had an idea. She stamped out the letters SOS in th

46、e snow. Fortunately, a pilot saw the signal and sent a message by radio to the nearest town. It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash.Lesson76 April Fools Day 愚人节To end our special news bulletin, said the voice of the television announcer, w

47、e are taking you to the macaroni fields of Calabria. Macaroni has been grown in this area for over six hundred years. Two of the leading growers, Giuseppe Moldova and Ricardo Brabante, tell me that they have been expecting a splendid crop this year and harvesting has begun earlier than usual. Here y

48、ou can see two workers who, between them, have just finished cutting three cart-loads of golden brownmacaroni stalks. The whole village has been working day and night gathering and threshing this years crop before the September rains. On the right, you can see Mrs Brabante herself. She has been help

49、ing her husband for thirty years now. Mrs Brabante is talking to the manager of the local factory where the crop is processed. This last scene shows you what will happen at the end of the harvest : the famous Calabrian macaroni-eating competition ! Signor Fratelli, the present champion, has won it every year since 1961. And that ends our special bulletin for today, Thursday, April 1st