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WO2006050658A1 - A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace - Google Patents

A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace Download PDF

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WO2006050658A1
WO2006050658A1 PCT/CN2005/001827 CN2005001827W WO2006050658A1 WO 2006050658 A1 WO2006050658 A1 WO 2006050658A1 CN 2005001827 W CN2005001827 W CN 2005001827W WO 2006050658 A1 WO2006050658 A1 WO 2006050658A1
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smelting
ore
blast furnace
nickel oxide
nickel
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Chinese (zh)
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Shenjie Liu
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    • 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
    • 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
    • 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

Definitions

  • the invention relates to a blast furnace smelting process, in particular to a process of smelting ferronickel by a blast furnace of nickel oxide ore without crystal water.
  • nickel metal the most important element of smelting stainless steel and special steel
  • the traditional nickel metal production is mainly extracted from the nickel sulfide ore which accounts for 30% of the earth's nickel resources, and its production process is mature.
  • the current reserves are insufficient and resources are in crisis. It is forced to pay more attention to the extraction of nickel metal from the laterite nickel ore (nickel oxide ore) which accounts for 70% of the earth's nickel resources.
  • the solution is separated from the nickel sulfate, and metal nickel is formed by electrolysis to form only 1 to 2% of the total amount, and the remaining components are discarded.
  • the process equipment has large investment, complicated process, long cycle and serious environmental pollution.
  • the use of blast furnace smelting is undoubtedly a more economical choice, but because the laterite nickel ore is often accompanied by Cr 2 0 3 components, and the melting point of chromium is high,
  • the sintered ore is crushed and sieved, and the sintered ore with a particle size of 10 to 50 mm is a smelting raw material of the blast furnace, and the ore powder having a particle diameter of less than 10 mm is re-sintered;
  • Nickel 0. 5 ⁇ 4. 5%
  • the CaO content is greater than 50% limestone, quicklime CaO content greater than 80%, the content of Mg in the dolomite> 10%, in the fluorite CaF 2 content of> 80%.
  • the blast furnace smelting process provided by the invention has low cost, and the traditional ore furnace process requires 2000 to 4000 kWh/ton of iron, and the coke is 0.5 ton.
  • the blast furnace consumes 150 ⁇ 200 in the process provided by the invention. Electricity / ton of iron. Energy saving, large output, average blast furnace output is greater than the average output of the submerged arc furnace. Less pollution and less dust.
  • the raw material recovery rate is high, and the yields are: iron 97 ⁇ 98%, nickel 99%, chromium 40 ⁇ 50%. detailed description:
  • Sintered ore, raw ore, coke, limestone/lime, dolomite and fluorite are mixed and smelted to obtain ferronickel.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace, which comprises breaking and screening the raw ore, preparing agglomerate from the breeze, mixing the agglomerate, coke, limestone/calcined lime, dolomite and fluorite, and smelting them to obtain ferronickel in the blast furnace. The weight ratios of additives to agglomerate are as follows: fluorite 0.3~8%, dolomite 0~8%, limestone/ calcined lime 4~35%. Compared with the prior arts, by means of the ratio of fluorite to agglomerate in the smelting process of the invention, the influence of chromium upon furnace temperature can be reduced, and the burning through accident of hearth due to excessive content of fluorine can be avoided. The magnesium in dolomite can settle the problem of poor fluidity of molten iron caused by the chromium in nickel-chromium ore. Limestone not only provides the basicity but also balances the said additives. The smelting process of the invention is low in cost, and has a high recovery rate of raw material.

Description

不含结晶水氧化镍矿经高炉冶炼镍铁工艺 技术领域：  No crystallization of nickel oxide ore by blast furnace smelting ferronickel technology:

本发明涉及高炉冶炼工艺， 特别是不含结晶水的氧化镍矿经高 炉冶炼镍铁工艺。 ' 背景技术：  The invention relates to a blast furnace smelting process, in particular to a process of smelting ferronickel by a blast furnace of nickel oxide ore without crystal water. ' 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）， 一般釆用矿热炉冶炼， 不 过这个工艺存在耗 E 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 ft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。采用高炉冶炼无疑是较为经济的 选择， 但由于红土镍矿常伴生有 Cr203成分， 而铬的熔点很高， 使得融 With the wide application of stainless steel and special steel in the world, the supply of nickel metal, the most important element of smelting stainless steel and special steel, is in short supply, causing the price to soar. The traditional nickel metal production is mainly extracted from the 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 resources are in crisis. It is forced to pay more attention to the extraction of nickel metal from the laterite nickel ore (nickel oxide ore) which accounts for 70% of the earth's nickel resources. The main reason why red earth nickel ore has not been developed on a large scale for a long time is that the process of extracting nickel from such mineral deposits has high process cost, complicated process, low output and serious pollution. At present, high-grade laterite nickel ore (containing more than 2.0% nickel) is generally used for smelting in submerged arc furnaces. However, this process has disadvantages such as high consumption E, large environmental pollution, and low production yield of gaps. For low-grade laterite ft ore, wet smelting, that is, sulfuric acid immersion, is used to convert solid nickel oxide, chromium oxide, iron oxide, etc. in laterite nickel ore into liquid nickel sulfate, chromium sulfate, ferrous sulfate, etc. The solution is separated from the nickel sulfate, and metal nickel is formed by electrolysis to form only 1 to 2% of the total amount, and the remaining components are discarded. The process equipment has large investment, complicated process, long cycle and serious environmental pollution. The use of blast furnace smelting is undoubtedly a more economical choice, but because the laterite nickel ore is often accompanied by Cr 2 0 3 components, and the melting point of chromium is high,

. 替换页《细则第 26条） 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。 发明内容： Replacement page "Article 26" The molten iron has a high viscosity, and the nickel-containing ferrochrome cannot flow smoothly, causing serious consequences of freezing the furnace and destroying the furnace. Many domestic and foreign enterprises and research institutes have carried out research on the process of smelting nickel-iron (nickel-iron) by red blast furnace in one step by blast furnace, but there has been no successful report so far. Therefore, it is an urgent problem to be solved in the industry to find a process technology that directly smelters into nickel-iron from laterite nickel ore with high efficiency, low consumption, high output, low cost, and no pollution or low pollution. Summary of the invention:

本发明旨在解决上述问题， 提供一种不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 one-step smelting process of nickel iron by a blast furnace containing nickel oxide ore without crystal water.

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

本发明提供一种不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 ferronickel by blast furnace without crystallization of water nickel oxide ore, which mainly comprises the following steps:

将原矿破碎筛分， 其中粒径 10〜60mm的原矿块为高炉冶炼原料， 粒径小于 10mm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 sieved, wherein the raw ore block with a particle size of 10~60mm is a smelting raw material for blast furnace, the mineral powder with a particle diameter of less than 10mm is sintered with the coke powder and quicklime/limestone mixed ingredients to obtain a sintered ore;

将烧结矿块破碎筛分， 粒径 10〜50mm的烧结矿块为高炉冶炼原 料， 粒径小于 10mm的矿粉重新烧结；  The sintered ore is crushed and sieved, and the sintered ore with a particle size of 10 to 50 mm is a smelting raw material of the blast furnace, and the ore powder having a particle diameter of less than 10 mm is re-sintered;

将烧结矿块、 原矿块、 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： 萤石 0. 3〜8%  The sinter smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting

白云石 0〜8%  Dolomite 0~8%

石灰石 /生石灰 4〜35%。  Limestone / quicklime 4 to 35%.

更正页（细则第 1条) 其中冶炼步骤中可不添加原矿块作为冶炼原料。 Correction page (rule 1) In the smelting step, raw ore nuggets may not be added as raw materials for smelting.

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

镍： 0. 5〜4. 5%;  Nickel: 0. 5~4. 5%;

铬： 0· 3〜12%;  Chromium: 0·3~12%;

铁： 38〜55%。  Iron: 38~55%.

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

萤石 0. 3〜5%  Fluorite 0. 3~5%

白云石 0. 5〜5%  Dolomite 0. 5~5%

石灰石 /生石灰 8〜15%。  Limestone / quicklime 8~15%.

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 is greater than 50% limestone, quicklime CaO content greater than 80%, the content of Mg in the dolomite> 10%, in the fluorite CaF 2 content of> 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 °C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 2300Ό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 更正页（细则第 91条） 一次性全部 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 prior art, in the traditional blast furnace smelting process, the furnace temperature can reach up to about 1700 °C, and the chromium contained in the nickel oxide ore is mostly in the form of chromic oxide, and the melting point of chromic oxide is about 2300 ,, so The degree of reduction of chromium in nickel oxide ore is limited, resulting in poor fluidity of molten iron obtained from smelting, and it is prone to freezing furnace phenomenon and even accidents. The addition of fluorite in the ferrochrome smelting ferronickel process provided by the invention can effectively reduce the influence of chromium on the furnace temperature, improve the fluidity of the molten iron, and at the same time, because the fluorite added in the smelting process provided by the invention The amount is strictly calculated, which can effectively avoid accidents such as the burning of the hearth caused by the excessive amount of fluorite. 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 flow of molten iron caused by chromium in the nickel-chromium ore. Limestone not only provides alkalinity but also balances the two additives mentioned above. The one-step smelting process of the blast furnace provided by the invention has a short process flow, a large continuous production yield, and a nickel ferrochrome correction in the laterite nickel ore (Article 91) All the one-time extraction, high resource utilization. The slag produced by its smelting is a good raw material for the production of cement. Except for discharging a certain amount of co 2 gas, no other solid or liquid waste is produced, and there is no pollution.

经过比对，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%。 具体实施方式：  After comparison, the blast furnace smelting process provided by the invention has low cost, and the traditional ore furnace process requires 2000 to 4000 kWh/ton of iron, and the coke is 0.5 ton. The blast furnace consumes 150~200 in the process provided by the invention. Electricity / ton of iron. Energy saving, large output, average blast furnace output is greater than the average output of the submerged arc furnace. Less pollution and less dust. The raw material recovery rate is high, and the yields are: iron 97~98%, nickel 99%, chromium 40~50%. detailed description:

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 invention is further illustrated by the following examples, which are not intended to limit the scope of the invention, and all modifications and adaptations based on the inventive concept are within the scope of the invention.

将原矿破碎筛分， 其中粒径 10〜60mm的原矿块为高炉冶炼原料， 粒径小于 lOim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 sieved, wherein the raw ore block with a particle size of 10~60mm is a smelting raw material of the blast furnace, and the ore powder with a particle diameter of less than lOim is sintered with the coke powder and the quicklime/limestone mixed batch to obtain a sintered ore;

将烧结矿块破碎筛分， 粒径 10〜50mm的烧结矿块为高炉冶炼原 料， 粒径小于 10mm的矿粉重新烧结；  The sintered ore is crushed and sieved, and the sintered ore with a particle size of 10 to 50 mm is a smelting raw material of the blast furnace, and the ore powder having a particle diameter of less than 10 mm is re-sintered;

将烧结矿块、 原矿块、 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。  Sintered ore, raw ore, coke, limestone/lime, dolomite and fluorite are mixed and smelted to obtain ferronickel.

更正页（细则第 91条) 将烧结矿和其它原料混合冶炼，其中烧结矿与原矿可以任意比例 混合， 也可完全使用烧结矿或原矿， 如全部使用原矿， 矿石与焦炭比 例为 1.9〜2.1： 1，如全部使用烧结矿，矿与焦炭比例为 2.2〜2.4： 1。 Correction page (Article 91) The sinter and other raw materials are mixed and smelted, wherein the sinter and the ore can be mixed in any ratio, or the sinter or ore can be completely used. For example, all the ore is used, and the ratio of ore to coke is 1.9 to 2.1: 1. If all the sinter is used, The ratio of mine to coke is 2.2~2.4: 1.

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

Figure imgf000007_0001
所得烧结矿的主要成分及含量 （重量％) 为:
Figure imgf000007_0001
The main components and content (% by weight) of the obtained sintered ore are:

Fe Ni Cr Ca Si  Fe Ni Cr Ca Si

1 36.10 4.78 12.10 6.10 3.34  1 36.10 4.78 12.10 6.10 3.34

2 38.24 3.63 10.87 5.82 3.40  2 38.24 3.63 10.87 5.82 3.40

3 40.81 1.76 9.04 5.61 3.52  3 40.81 1.76 9.04 5.61 3.52

4 43.57 1.38 7.48 5.30 3.61  4 43.57 1.38 7.48 5.30 3.61

5 44.82 0.88 3.48 5.10 3.62  5 44.82 0.88 3.48 5.10 3.62

6 46.50 0.54 3.18 4.91 3.63 高炉炉料组成 （重量 Kg) 如下表 6 46.50 0.54 3.18 4.91 3.63 Blast furnace charge composition (weight Kg) as shown in the following table

Figure imgf000008_0001
Figure imgf000008_0001

高炉冶炼工艺参数

Figure imgf000008_0002
冶炼所得镍铁主要成分及含量 （重量％) 为： Blast furnace smelting process parameters
Figure imgf000008_0002
The main components and content (% by weight) of ferronickel obtained by smelting are:

Fe Ni Cr S PFe Ni Cr S P

1 48.26 31.10 33.11 0.061 0.0601 48.26 31.10 33.11 0.061 0.060

2 52.31 10.59 23.10 0.059 0.0612 52.31 10.59 23.10 0.059 0.061

3 64.58 8.32 22.38 0.059 0.0593 64.58 8.32 22.38 0.059 0.059

4 75.51 5.98 13.36 0.060 0.0584 75.51 5.98 13.36 0.060 0.058

5 85.29 3.24 7.09 0.058 0.0575 85.29 3.24 7.09 0.058 0.057

6 93.46 0.92 0.63 0.057 0.060 6 93.46 0.92 0.63 0.057 0.060

Claims

权利 要 求 书 Claim 1.一种不含结晶水氧化镍矿经高炉冶炼镍铁工艺， 其特征在 于： 所述高炉冶炼工艺主要包括如下步骤：  A process for smelting ferronickel by a blast furnace containing no crystallization water nickel oxide ore, characterized in that: the blast furnace smelting process mainly comprises the following steps: 将原矿破碎筛分， 其中粒径 10〜60mm的原矿块为高炉冶炼原料， 粒径小于 10mm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 sieved, wherein the raw ore block with a particle size of 10~60mm is a smelting raw material for blast furnace, the mineral powder with a particle diameter of less than 10mm is sintered with the coke powder and quicklime/limestone mixed ingredients to obtain a sintered ore; 将烧结矿块破碎筛分， 粒径 10〜50mm的烧结矿块为高炉冶炼原 料， 粒径小于 10皿的矿粉重新烧结；  The sintered ore is crushed and sieved, and the sintered ore with a particle size of 10 to 50 mm is a smelting raw material of the blast furnace, and the ore powder having a particle diameter of less than 10 is re-sintered; 将烧结矿块、 原矿块、 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： 萤石 0. 3〜8%  The sinter smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting smelting 白云石 0〜8' '0  Dolomite 0~8' '0 石灰石 /生石灰 4〜35%。  Limestone / quicklime 4 to 35%. 2.如权利要求 1所述的不含结晶水氧化镍矿经高炉冶炼镍铁工 艺， 其中所述氧化镍矿的主要成分及其重量比为： 镍： 0. 5〜4. 5%; 铬： 0. 3〜12¾)； 铁： 38〜55%。 2. The non-crystalline water as claimed in claim 1 nickel oxide ore by blast-furnace smelting nickel-iron process, wherein the main component of nickel oxide ore and the weight ratio: Ni: 0. 5% 5~4; Chromium : 0. 3~123⁄4); Iron: 38~55%. 3.如权利要求 1所述的不含结晶水氧化镍矿经高炉冶炼镍铁工 艺， 其中冶炼步骤中可不添加原矿块作为冶炼原料。  The process of smelting nickel-iron in a blast furnace containing no crystal water nickel oxide ore according to claim 1, wherein the raw ore block is not added as a raw material for smelting in the smelting step. 4.如权利要求 1或 3所述的不含结晶水氧化镍矿经高炉冶炼镍铁 工艺， 其中所述的添加剂与烧结矿的重量比优选为：  The process for smelting ferronickel by blast furnace containing no crystal water nickel oxide ore according to claim 1 or 3, wherein the weight ratio of said additive to sintered ore is preferably: 萤石 0. 3〜5%  Fluorite 0. 3~5% 白云石 0. 5〜5¾>  Dolomite 0. 5~53⁄4> 更正页（细^第 91条) 石灰石 /生石灰 8〜15%。 Correction page (thin ^Article 91) Limestone/lime is 8~15%. 5.如权利要求 1或 3所述的不含结晶水氧化镍矿经高炉冶炼镍 铁工艺， 其中所述石灰石中 CaO含量大于 50%， 生石灰中 CaO含量大于 80%。  The kiln-free smelting ferronickel process according to claim 1 or claim 3, wherein the limestone has a CaO content of more than 50% and the quicklime has a CaO content of more than 80%. 6.如权利要求 1或 3所述的不含结晶水氧化镍矿经高炉冶炼镍 铁工艺， 其中所述白云石中 Mg含量〉 10%。  The process for smelting ferronickel by a blast furnace containing no crystal water nickel oxide ore according to claim 1 or 3, wherein the dolomite has a Mg content of > 10%. 7.如权利要求 1或 3所述的不含结晶水氧化镍矿经高炉冶炼镍 铁工艺， 其中所述萤石中 CaF2含量〉 80%。 The process for smelting nickel-iron by blast furnace containing no crystal water nickel oxide ore according to claim 1 or 3, wherein the fluorite has a CaF 2 content of > 80%. 更正页（细则第 91条) Correction page (Article 91)
PCT/CN2005/001827 2005-09-16 2005-11-02 A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace Ceased WO2006050658A1 (en)

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