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CN1300352C - Nickel-iron smelting process from nickel oxide ore containing crystal water through blast furnace - Google Patents

Nickel-iron smelting process from nickel oxide ore containing crystal water through blast furnace Download PDF

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CN1300352C
CN1300352C CNB200510102985XA CN200510102985A CN1300352C CN 1300352 C CN1300352 C CN 1300352C CN B200510102985X A CNB200510102985X A CN B200510102985XA CN 200510102985 A CN200510102985 A CN 200510102985A CN 1300352 C CN1300352 C CN 1300352C
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nickel
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furnace smelting
fluorite
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CN1743476A (en
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刘沈杰
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Priority to EP05801995.1A priority patent/EP1927666B1/en
Priority to PCT/CN2005/001828 priority patent/WO2006045254A1/en
Priority to KR1020107006683A priority patent/KR20100039907A/en
Priority to KR1020067017163A priority patent/KR20070085068A/en
Priority to JP2008530297A priority patent/JP4734415B2/en
Priority to AU2005299184A priority patent/AU2005299184B2/en
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Priority to MYPI20064303A priority patent/MY147763A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/02—General features in the manufacture of pig-iron by applying additives, e.g. fluxing agents
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/008—Composition or distribution of the charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/02—Obtaining nickel or cobalt by dry processes
    • C22B23/023—Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
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  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
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  • Manufacture And Refinement Of Metals (AREA)

Abstract

本发明提供一种含结晶水氧化镍矿经高炉冶炼镍铁工艺，主要包括将原矿破碎筛分，矿粉制成烧结矿，烧结矿块、焦炭、石灰石/生石灰、白云石和萤石混配进行高炉冶炼得到镍铁，其中添加剂与烧结矿重量比为：萤石0.3～20%、白云石0～8%、石灰石/生石灰4～35%，工艺还包括将烧结矿块粉碎筛分进行磁选得精矿粉再进行烧结，和现有技术相比，本发明所提供的镍铁冶炼工艺中萤石与烧结矿的比例可以降低铬对炉温的影响，同时也避免因为含氟过高导致炉缸烧穿等事故发生；白云石中所含有的镁可以解决镍铬矿中铬引起的铁水流动性差的问题；石灰石不但可以提供碱度还能均衡上述两种添加剂，发明所提供的高炉冶炼法成本低廉，原料回收率高。The invention provides a process for smelting nickel-iron ore containing crystalline water through a blast furnace, which mainly includes crushing and screening the raw ore, making the ore powder into sintered ore, and mixing sintered ore lumps, coke, limestone/quicklime, dolomite and fluorite. Ferronickel is obtained by blast furnace smelting, in which the weight ratio of additives to sintered ore is: 0.3-20% of fluorite, 0-8% of dolomite, 4-35% of limestone/quicklime, and the process also includes crushing and screening the sintered ore for magnetic separation The concentrated ore powder is then sintered. Compared with the prior art, the ratio of fluorite to sintered ore in the ferronickel smelting process provided by the present invention can reduce the influence of chromium on the furnace temperature, and at the same time avoid Accidents such as furnace hearth burn-through occurred; the magnesium contained in dolomite can solve the problem of poor fluidity of molten iron caused by chromium in nickel-chromium ore; limestone can not only provide alkalinity but also balance the above two additives. The method has low cost and high raw material recovery rate.

Description

含结晶水的氧化镍矿经高炉冶炼镍铁工艺Nickel Oxide Ore Containing Crystal Water Smelting Ferronickel by Blast Furnace

技术领域：Technical field:

本发明涉及高炉冶炼工艺，特别是含结晶水的氧化镍矿经高炉冶炼镍铁工艺。The invention relates to a blast furnace smelting process, in particular to a blast furnace smelting nickel-iron ore containing crystal water.

背景技术：Background technique:

随着全球不锈钢和特殊钢的广泛应用，造成冶炼不锈钢和特殊钢的最主要元素——镍金属供应短缺，引起价格飞涨。传统的镍金属生产主要从占地球镍资源30％的硫化镍矿中提取，其生产工艺成熟。但经过近百年连续开采，目前储量不足，资源呈现危机。迫使人们对占地球镍资源70％的红土镍矿(氧化镍矿)中提取镍金属给予更多重视。长期以来红土镍矿没有得到大规模开发的主要原因是从此类矿藏中提取镍的工艺成本高、工艺复杂、产量低、污染严重。目前国际上对高品位的红土镍矿(含镍量在2.0％以上)，一般采用矿热炉冶炼，不过这个工艺存在耗电高、环境污染大、间隙式生产产量低等弊端。对于低品位的红土镍矿多采用湿法冶炼，即硫酸浸泡的方法，将红土镍矿中固态的氧化镍、氧化铬、氧化铁等转化为液态的硫酸镍、硫酸铬、硫酸亚铁等混合溶液，再将硫酸镍从中分离出来，经过电解形成仅占总量1～2％的金属镍，其余成分都被废弃。此工艺设备一次性投资大、工艺复杂、周期长、环境污染严重。也可以采用高炉冶炼，但由于红土镍矿常伴生有Cr2O3成分，而铬的熔点很高，使得融化后的铁水粘度大，含镍铬铁水不能顺利流出，造成冻炉、毁炉的严重后果。国内外多家企业和研究机构对于红土镍矿经高炉一步法冶炼成镍铁(镍铁)的工艺研究进行了很久，但至今没有成功的报道。因此，寻找一种高效低耗、产量高、成本低，且无污染或低污染的从红土镍矿直接冶炼成镍铁的工艺技术成为业内亟待解决的课题。With the wide application of stainless steel and special steel around the world, the most important element for smelting stainless steel and special steel - nickel metal is in short supply, causing the price to soar. Traditional nickel metal production is mainly extracted from nickel sulfide ore, which accounts for 30% of the earth's nickel resources, and its production process is mature. However, after nearly a hundred years of continuous mining, the current reserves are insufficient and the resources are in crisis. Force people to pay more attention to extracting nickel metal from laterite nickel ore (nickel oxide ore), which accounts for 70% of the earth's nickel resources. The main reason why laterite nickel ore has not been developed on a large scale for a long time is that the process of extracting nickel from such deposits is high in cost, complicated in process, low in output and serious in pollution. At present, high-grade lateritic nickel ore (with a nickel content above 2.0%) is generally smelted in submerged arc furnaces in the world. However, this process has disadvantages such as high power consumption, large environmental pollution, and low output in intermittent production. For low-grade laterite nickel ore, wet smelting is often used, that is, the method of soaking in sulfuric acid to convert solid nickel oxide, chromium oxide, iron oxide, etc. in laterite nickel ore into liquid nickel sulfate, chromium sulfate, ferrous sulfate, etc. solution, and nickel sulfate is separated from it, and electrolysis forms only 1 to 2% of the total amount of nickel metal, and the rest of the components are discarded. The one-time investment of this process equipment is large, the process is complex, the cycle is long, and the environmental pollution is serious. It can also be smelted in a blast furnace, but since the laterite nickel ore is often accompanied by Cr 2 O 3 components, and the melting point of chromium is very high, the molten iron after melting has a high viscosity, and the molten iron containing nickel and chromium cannot flow out smoothly, resulting in freezing and destroying the furnace. Serious consequences. Many enterprises and research institutes at home and abroad have conducted research on the process of smelting laterite nickel ore into nickel-iron (iron-nickel) by one-step blast furnace for a long time, but there is no successful report so far. Therefore, it is an urgent problem to be solved in the industry to find a high-efficiency, low-consumption, high-yield, low-cost, and pollution-free or low-pollution technology for directly smelting ferronickel from laterite nickel ore.

发明内容：Invention content:

本发明旨在解决上述问题，提供一种含结晶水的氧化镍矿经高炉一步法冶炼镍铁工艺。The present invention aims to solve the above problems, and provides a process for smelting nickel-iron ore containing crystal water in a blast furnace in one step.

本发明的上述目的是通过下面的技术方案实现的。The above-mentioned purpose of the present invention is achieved through the following technical solutions.

本发明提供一种含结晶水氧化镍矿经高炉冶炼镍铁工艺，主要包括如下步骤：The invention provides a process for smelting nickel-iron ore containing crystalline water through a blast furnace, which mainly includes the following steps:

将原矿破碎筛分，其中粒径小于2mm的矿粉与焦粉、生石灰/石灰石混合配料进行烧结，得到烧结矿块；The raw ore is crushed and screened, and the ore powder with a particle size of less than 2mm is mixed with coke powder and quicklime/limestone for sintering to obtain sintered ore nuggets;

将烧结矿块、焦炭、石灰石/生石灰、白云石和萤石混配进行高炉冶炼得到镍铁，其中，下列添加剂与烧结矿重量比为：Ferronickel is obtained by mixing sintered ore lumps, coke, limestone/quicklime, dolomite and fluorite in a blast furnace, wherein the weight ratio of the following additives to sintered ore is:

萤石                      0.3～20％Fluorite 0.3～20%

白云石                    0～8％Dolomite 0～8%

石灰石/生石灰             4～35％。Limestone/quicklime 4-35%.

本发明所提供的含结晶水氧化镍矿经高炉冶炼镍铁工艺还可包括如下步骤：The crystalline water-containing nickel oxide ore provided by the present invention can also include the following steps through the process of smelting ferronickel in a blast furnace:

将一次烧结所得烧结矿块粉碎后经300～500目筛子筛分后进行磁选得精矿粉；Crush the sintered ore block obtained from the primary sintering, and then sieve through a 300-500-mesh sieve, and then perform magnetic separation to obtain the concentrate powder;

将精矿粉与焦粉、生石灰/石灰石混合配料进行烧结，得到烧结矿块；Sintering the concentrate powder, coke powder, and quicklime/limestone to obtain sintered ore nuggets;

将二次烧结后的烧结矿块与焦炭、石灰石/生石灰、白云石和萤石混配进行高炉冶炼得到镍铁。The sintered ore after secondary sintering is mixed with coke, limestone/quicklime, dolomite and fluorite for blast furnace smelting to obtain ferronickel.

其中所述氧化镍矿的主要成分及其重量比为：The main components and weight ratios thereof of the nickel oxide ore are:

镍：0.5～4％；Nickel: 0.5~4%;

铬：0.3～12％；Chromium: 0.3-12%;

铁：7～55％。Iron: 7-55%.

其中所述的添加剂与烧结矿的重量比优选为：Wherein the weight ratio of additive and sintered ore is preferably:

萤石                      0.3～10％Fluorite 0.3～10%

白云石                    0.5～5％Dolomite 0.5～5%

石灰石/生石灰             8～20％。Limestone/quicklime 8-20%.

其中所述石灰石中CaO含量大于50％，生石灰中CaO含量大于80％，所述白云石中Mg含量＞10％，所述萤石中CaF2含量＞80％。Wherein the CaO content in the limestone is greater than 50%, the CaO content in the quicklime is greater than 80%, the Mg content in the dolomite is greater than 10%, and the CaF2 content in the fluorite is greater than 80%.

和现有技术相比，传统高炉冶炼工艺中，炉温最高可达到1700℃左右，氧化镍矿中所含铬多以三氧化二铬形式存在，三氧化二铬的熔点在2300℃左右，所以氧化镍矿中铬的还原程度有限，导致冶炼所得铁水流动性差，容易发生冻炉现象，甚至发生事故。本发明所提供的镍铬铁矿冶炼镍铁工艺中加入萤石可以有效降低铬对炉温的影响，提高了铁水的流动性，同时，因为本发明所提供的冶炼工艺中所加入萤石的量经过严格计算，可以有效避免因为萤石加入量过高导致炉缸烧穿等事故发生。同时，本发明所提供的工艺中白云石所含的镁也可以帮助解决镍铬矿中铬引起的铁水流动性差的问题。石灰石不但可以提供碱度还能均衡上述两种添加剂。本发明所提供的高炉一步法冶炼工艺具有工艺流程短、连续生产产量大、红土镍矿中镍铬铁元素一次性全部被提取，资源利用率高。其冶炼产生的炉渣是生产水泥的良好原料，除排放一定量的CO2气体，没有其它固体或液体废弃物产生，无污染。Compared with the existing technology, in the traditional blast furnace smelting process, the maximum furnace temperature can reach about 1700°C, and the chromium contained in nickel oxide ore mostly exists in the form of dichromium trioxide, and the melting point of dichromium trioxide is about 2300°C, so The reduction degree of chromium in nickel oxide ore is limited, resulting in poor fluidity of molten iron obtained from smelting, prone to freezing furnace phenomenon, and even accidents. The addition of fluorite to the ferronickel smelting process provided by the invention can effectively reduce the influence of chromium on the furnace temperature and improve the fluidity of molten iron. At the same time, because the fluorite added in the smelting process provided by the invention The amount has been strictly calculated, which can effectively avoid accidents such as hearth burn-through due to excessive fluorite addition. At the same time, the magnesium contained in the dolomite in the process provided by the present invention can also help solve the problem of poor fluidity of molten iron caused by chromium in the nickel-chromium ore. Limestone not only provides alkalinity but also balances the above two additives. The blast furnace one-step smelting process provided by the invention has the advantages of short process flow, large continuous production output, all nickel, chromium and iron elements in the laterite nickel ore can be extracted at one time, and the resource utilization rate is high. The slag produced by its smelting is a good raw material for cement production. Except for a certain amount of CO 2 gas, there is no other solid or liquid waste and no pollution.

经过对比，本发明所提供的高炉冶炼工艺成本低，传统矿热炉工艺需要耗费2000～4000度电/吨铁，焦炭0.5吨，本发明所提供的工艺中高炉耗电150～200度电/吨铁。节约能源，产量大，高炉平均产量大于矿热炉平均产量。污染少，粉尘少。原料回收率高，收率分别为：铁97～98％，镍99％，铬40～50％。After comparison, the cost of the blast furnace smelting process provided by the present invention is low. The traditional submerged arc furnace process needs to consume 2000-4000 kWh/ton of iron and 0.5 tons of coke. The blast furnace power consumption in the process provided by the invention is 150-200 kWh/t tons of iron. Energy saving, large output, the average output of the blast furnace is greater than the average output of the submerged arc furnace. Less pollution and less dust. The recovery rate of raw materials is high, and the yields are respectively: 97-98% of iron, 99% of nickel, and 40-50% of chromium.

具体实施方式：Detailed ways:

下面接合具体实施例对本发明进行进一步的解释说明，下列实施例并不限制本发明的保护范围，所有基于本发明的思想做的修改和调整都属于本发明保护的范围。The present invention will be further explained in conjunction with specific examples below. The following examples do not limit the scope of protection of the present invention, and all modifications and adjustments made based on the ideas of the present invention belong to the scope of protection of the present invention.

实施例中原矿选自阿尔巴尼亚进口的镍铬铁矿。In the embodiment, the raw ore is selected from nickel-chromite imported from Albania.

将原矿破碎筛分，其中粒径小于2mm的矿粉与焦粉、生石灰/石灰石混合配料进行烧结，得到烧结矿块；The raw ore is crushed and screened, and the ore powder with a particle size of less than 2mm is mixed with coke powder and quicklime/limestone for sintering to obtain sintered ore nuggets;

将一次烧结所得烧结矿块粉碎后经300～500目筛子筛分后进行磁选得精矿粉；Crush the sintered ore block obtained from the primary sintering, and then sieve through a 300-500-mesh sieve, and then perform magnetic separation to obtain the concentrate powder;

将精矿粉与焦粉、生石灰/石灰石混合配料进行烧结，得到烧结矿块；将粒径10～50mm的烧结矿块烧结矿和其它原料混合冶炼，得到镍铁。The concentrate powder is mixed with coke powder and quicklime/limestone for sintering to obtain sintered ore lumps; the sintered ore lumps with a particle size of 10-50 mm are mixed and smelted with other raw materials to obtain ferronickel.

所用镍铬铁矿主要成份及含量(重量％)为The main components and content (% by weight) of nickel-chromite used are

所得烧结矿的主要成分及含量(重量％)为：The main components and content (% by weight) of gained sintered ore are:

Figure C20051010298500062
Figure C20051010298500062

高炉炉料组成(重量Kg)如下表Blast furnace charge composition (weight Kg) is as follows

Figure C20051010298500063
Figure C20051010298500063

高炉冶炼工艺参数Blast furnace smelting process parameters

Figure C20051010298500071
Figure C20051010298500071

冶炼所得镍铁主要成分及含量(重量％)为：The main components and content (% by weight) of smelting gained ferronickel are:

Figure C20051010298500072
Figure C20051010298500072

Claims (7)

1. a nickel oxide ore that contains crystal water is through blast-furnace smelting ferronickel technology, and it is characterized in that: described blast furnace smelting process mainly comprises the steps:
With the crushing raw ore screening, wherein particle diameter carries out sintering less than breeze and coke powder, the unslaked lime/Wingdale mix of 2mm, obtains the sintering nugget;
Sintering nugget, coke, Wingdale/unslaked lime, rhombspar and fluorite be mixed carry out blast-furnace smelting and obtain ferronickel, wherein, following additive and agglomerate weight ratio are:
Fluorite 0.3～20%
Rhombspar 0～8%
Wingdale/unslaked lime 4～35%.
2. the nickel oxide ore that contains crystal water as claimed in claim 1 is through blast-furnace smelting ferronickel technology, and wherein said blast furnace smelting process also comprises the steps:
The pulverizing of sintering nugget is got fine ore after carry out magnetic separation after the screening of 300～500 mesh sieves;
Fine ore and coke powder, unslaked lime/Wingdale mix are carried out sintering, obtain the sintering nugget;
Sintering nugget behind the double sintering and coke, Wingdale/unslaked lime, rhombspar and fluorite be mixed carry out blast-furnace smelting and obtain ferronickel.
3. the nickel oxide ore that contains crystal water as claimed in claim 1 or 2 is through blast-furnace smelting ferronickel technology, and the main component of wherein said nickel oxide ore and weight ratio thereof are: nickel: 0.5～4%; Chromium: 0.3～12%; Iron: 7～55%.
4. the nickel oxide ore that contains crystal water as claimed in claim 1 or 2 is through blast-furnace smelting ferronickel technology, and the weight ratio of wherein said additive and agglomerate is preferably:
Fluorite 0.3～10%
Rhombspar 0.5～5%
Wingdale/unslaked lime 8～20%.
5. the nickel oxide ore that contains crystal water as claimed in claim 1 or 2 is through blast-furnace smelting ferronickel technology, and CaO content is greater than 50% in the wherein said Wingdale, and CaO content is greater than 80% in the unslaked lime.
6. the nickel oxide ore that contains crystal water as claimed in claim 1 or 2 is through blast-furnace smelting ferronickel technology, Mg content＞10% in the wherein said rhombspar.
7. the nickel oxide ore of crystal water that contains as claimed in claim 1 or 2 is through blast-furnace smelting ferronickel technology, CaF in the wherein said fluorite 2Content＞80%.
CNB200510102985XA 2005-09-16 2005-09-16 Nickel-iron smelting process from nickel oxide ore containing crystal water through blast furnace Ceased CN1300352C (en)

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KR1020067017163A KR20070085068A (en) 2005-09-16 2005-11-02 A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace
PCT/CN2005/001828 WO2006045254A1 (en) 2005-09-16 2005-11-02 A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace
KR1020107006683A KR20100039907A (en) 2005-09-16 2005-11-02 A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace
EP05801995.1A EP1927666B1 (en) 2005-09-16 2005-11-02 A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace
JP2008530297A JP4734415B2 (en) 2005-09-16 2005-11-02 Method of refining nickel oxide ore containing crystal water into nickel iron in a blast furnace
AU2005299184A AU2005299184B2 (en) 2005-09-16 2005-11-02 A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace
MYPI20064303A MY147763A (en) 2005-09-16 2006-10-10 A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace

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