【正文】 若考慮共用武山銅礦的新建尾礦庫(kù)，可大幅度節(jié)省投資。綜上所述，本項(xiàng)目中的廢氣、廢水、廢渣都已有相應(yīng)的治理措施，不會(huì)對(duì)周圍環(huán)境造成污染，因此對(duì)周圍環(huán)境不會(huì)產(chǎn)生不利的影響。每生產(chǎn)一噸鎳產(chǎn)生的酸性廢渣約100噸（含水20%），采用加石灰中和處理后送尾礦庫(kù)堆存。廢水：本項(xiàng)目生產(chǎn)中每天需要新水量2788m3，外排水主要是浸出渣和中和渣帶走的水量，pH在11左右，性質(zhì)穩(wěn)定，重金屬離子如銅、鎳、工藝過(guò)程中需要大量水進(jìn)行洗滌除鎂，產(chǎn)生大量的含鎂廢水，通常的做法是采用加石灰乳將鎂沉淀，除鎂后的廢水可回用至工藝流程中。分離后的硫酸鈷溶液生產(chǎn)碳酸鈷。濾餅用硫酸溶解，制得濃度比較高的硫酸鎳、鈷的溶液。沉淀后礦漿進(jìn)入濃密機(jī)液固分離，底流壓濾獲得鎳鈷氫氧化物沉淀混合物濾餅。溢流液部分進(jìn)入下一個(gè)中和除雜工序。礦漿直接進(jìn)行中和除鐵，中和除雜后礦漿進(jìn)入下一段CCD洗滌工序。本項(xiàng)目采用的工藝為常壓酸浸，主要工藝流程：原料經(jīng)球磨制漿→加熱常壓酸浸→一步除鐵→二步除鐵→除雜→濃密機(jī)逆流洗滌→洗滌后的廢渣中和→濃縮送尾礦庫(kù)→上清濾液加堿產(chǎn)生氫氧化鎳漿液→濃縮→洗滌→板框壓濾→壓濾后的氫氧化鎳加硫酸溶解→萃取→電積鎳礦石經(jīng)過(guò)格篩進(jìn)入中間礦倉(cāng)，非常少量的塊度大于300mm礦石采用人工處理后進(jìn)入中間倉(cāng)，中間倉(cāng)下部出口接振動(dòng)篩，篩上礦送顎式破碎機(jī)，將礦石破碎到30mm以下，破碎后礦石和篩下礦一起通過(guò)運(yùn)輸皮帶送球磨工序。硅鎂鎳礦適合火法熔煉還原或常壓酸浸。五、 工藝流程根據(jù)紅土鎳礦的成因和成分的不同，可以簡(jiǎn)單地把紅土礦分為褐鐵礦和硅鎂鎳礦兩種。通過(guò)向港口物流部門(mén)咨詢，建議我們可采取以下兩種物流方案：其一、3萬(wàn)噸級(jí)左右的海運(yùn)船可在南通港靠岸，過(guò)駁到7000噸級(jí)左右的內(nèi)河船運(yùn)抵九江，從南通到九江的運(yùn)費(fèi)22元/噸，過(guò)駁費(fèi)用大約6元/噸；其二、4萬(wàn)噸以上的海運(yùn)大船受長(zhǎng)江口吃水深度的限制，必須在寧波北侖港靠岸，過(guò)駁到噸位較小的且可通過(guò)長(zhǎng)江口的船上，然后再到南通或張家港進(jìn)行二次過(guò)駁運(yùn)到九江，到達(dá)九江的物流費(fèi)用為60元/噸左右。隨著鎳金屬價(jià)格的上漲，近期紅土鎳礦價(jià)格也在不斷上揚(yáng)，%的硅鎂型紅土鎳礦港口現(xiàn)貨價(jià)格已經(jīng)從360元/噸上漲到近500元/噸（濕噸含稅）。從對(duì)以上兩個(gè)港口調(diào)研的情況來(lái)看，我們認(rèn)為目前紅土鎳礦的供應(yīng)相對(duì)充足，在現(xiàn)貨市場(chǎng)上每年購(gòu)買150多萬(wàn)噸硅鎂型紅土鎳礦還是比較容易的。日照港目前的庫(kù)存有370多萬(wàn)噸，各種品質(zhì)的都有，但主要以含鎳2%以上的為主。由于火法工藝在能耗、環(huán)保和成本方面都處于劣勢(shì)，按照目前的市場(chǎng)行情，經(jīng)營(yíng)狀況不佳。國(guó)內(nèi)紅土鎳礦進(jìn)口的主要港口包括：山東的日照港、嵐山港，天津港和江蘇連云港。2009年全年中國(guó)累計(jì)進(jìn)口紅土鎳礦1642萬(wàn)噸，%，創(chuàng)歷史新高。居前三位的是古巴、新喀里多尼亞和澳大利亞，擁有鎳金屬儲(chǔ)量分別為2300萬(wàn)噸、1500萬(wàn)噸、1100萬(wàn)噸。四、 原料來(lái)源 項(xiàng)目的主要原料為進(jìn)口硅鎂型紅土鎳礦（%）和硫酸，每噸鎳消耗紅土鎳礦105噸（濕基含水30~35%），消耗硫酸55噸。Lesson86 Out of control 失控I have just received a letter from my old school informing me that my former head master, Mr Regmald Page, 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 headmaster39。 time. Even so, people are going to find it difficult to get to work. But so far, 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!free rides39。Lesson84 On strike 罷工 but I love to hear you say it !39。 I know,39。Mr Lane was defeated in the elections. He has retired from political life and gone to live abroad !39。 I told you yesterday and the day before yesterday,39。s Radical Progressive Party. After the elections, Crawley went to the former Prime Minister39。Lesson83 After the elections 大選之后 which have at times been sighted are simply strange fish. Occasionally, unusual creaturesFishermen 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 these 39。s 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 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 attention 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 knocked him to the ground with a sharp blow. Then, jumping into the car, he drove off as quickly as he could. Lesson81 Escape 脫逃Perhaps the most extraordinary building of the nineteenth century was the Crystal Palace, which was built in Hyde Park for the Great Exhibition of 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. There was also a great deal of machinery on display. The most wonderful piece of machinery on show was Nasmyth39。Lesson80Lesson79 By air 乘飛機(jī)Cigarette Smoking and Your Health39。 The last one? 最后一枝嗎？inside 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. Lesson77 A successful operation 一例成功的手術(shù) factory where the crop is processed. This last scene shows you what will happen at the end of the harvest : the famous Calabrian macaronieating petition ! 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.39。macaroni stalks. The whole village has been working day and night gathering and threshing this year39。 said the voice of the television announcer,39。39。 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.三、產(chǎn)品方案根據(jù)國(guó)內(nèi)目前的紅土鎳礦冶煉技術(shù)進(jìn)展和環(huán)保要求，擬采用常壓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 she could send a signal. Then she had an idea. She stamped out the letters39。園區(qū)內(nèi)水泥產(chǎn)能較大，可適當(dāng)消化生產(chǎn)過(guò)程中產(chǎn)生的廢渣。工業(yè)園位置距江銅武山銅礦尾礦庫(kù)只有約10公里，便于酸浸廢渣的堆存，可不必新建尾礦庫(kù)，節(jié)約投資。相對(duì)于把建設(shè)地址選在德興銅礦做了物流成本對(duì)比（見(jiàn)表1） 供水、供電、運(yùn)輸、能源等基礎(chǔ)設(shè)施完備。區(qū)位交通便捷。經(jīng)過(guò)考察和調(diào)研，我們認(rèn)為瑞昌市碼頭鎮(zhèn)工業(yè)園建設(shè)條件相對(duì)較好，主要情況如下：土地供應(yīng)充裕。結(jié)合江銅的實(shí)際情況，并考慮紅土鎳礦資源的供應(yīng)現(xiàn)狀，擬將建設(shè)規(guī)模定為2，同時(shí)配套建設(shè)230萬(wàn)噸/年硫鐵礦循環(huán)經(jīng)濟(jì)項(xiàng)目，可以為濕法冶煉提供硫酸、蒸汽及電力。二、 建設(shè)規(guī)模及廠址選擇國(guó)內(nèi)外紅土鎳礦濕法冶煉單項(xiàng)目的鎳產(chǎn)量規(guī)模大多在3萬(wàn)噸以下，國(guó)際上比較著名的如古巴毛阿灣的規(guī)模3萬(wàn)噸/年；；澳大利亞的雅布魯3萬(wàn)噸/年；；；（），國(guó)內(nèi)廣西銀億和江西江鋰的設(shè)計(jì)產(chǎn)能5000噸/年，云南元江設(shè)計(jì)能力為3000噸/年。但是隨著濕法技術(shù)的日趨成熟、設(shè)備制造技術(shù)的進(jìn)步和規(guī)模的擴(kuò)大，濕法鎳廠在下一輪興建或擴(kuò)建項(xiàng)目中，其基建投資將會(huì)明顯下降；濕法工藝的生產(chǎn)成本在一般情況下低于鐵鎳流程，加上濕法耗能明顯低于鐵鎳流程。例如鷹橋公司與BHP公司合作開(kāi)發(fā)的印度尼西亞含鎳紅土礦項(xiàng)目， Inco公司在印尼以及新喀里多尼亞開(kāi)發(fā)的紅土礦項(xiàng)目等。發(fā)達(dá)