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WO2006045254A1 - A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace - Google Patents

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

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Publication number
WO2006045254A1
WO2006045254A1 PCT/CN2005/001828 CN2005001828W WO2006045254A1 WO 2006045254 A1 WO2006045254 A1 WO 2006045254A1 CN 2005001828 W CN2005001828 W CN 2005001828W WO 2006045254 A1 WO2006045254 A1 WO 2006045254A1
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blast furnace
ore
smelting
limestone
nickel
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Chinese (zh)
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Shenjie Liu
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Priority to JP2008530297A priority patent/JP4734415B2/en
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    • 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
    • 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
    • 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

Definitions

  • the invention provides a process for smelting ferronickel containing crystallization water nickel oxide ore through a blast furnace, which mainly comprises the following steps:
  • the raw ore is crushed and sieved, wherein the ore powder having a particle size smaller than 2 legs is sintered with the coke powder and the quick lime/limestone mixture to obtain a sintered ore;
  • the weight ratio of the additive to the sintered ore is preferably:
  • 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 >10%
  • the CaF content in the fluorite is >80%.
  • the blast furnace smelting process provided by the invention has low cost, and the traditional submerged arc 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, less powder.
  • the raw material recovery rate is high, and the yields are: iron 97 ⁇ 98%, nickel 99%, chromium 40 ⁇ 50%.
  • the ore is selected from the group consisting of nickel-niobium ore imported from Bulgaria.
  • the ore is crushed and sieved, wherein the ore powder having a particle diameter of less than 2 mm is sintered with the coke powder and the quicklime/limestone mixture to obtain a sintered ore;
  • the sintered ore obtained by sintering once is pulverized, sieved through a 300-500 mesh sieve, and then magnetically selected to obtain a concentrate powder; Sintering the concentrate powder with the coke powder, quicklime/limestone mixture to obtain a sintered ore;
  • the main components and content (% by weight) of the obtained sinter are:
  • the main components and content (% by weight) of ferronickel obtained by smelting are:

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

Abstract

A smelting process of ferronickel with nickel oxide ore containing 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 0.3~20%, dolomite 0~8%, limestone/calcined lime 4~35%. The process further comprises magnetic separating the agglomerate after breaking and screening to obtain concentrate breeze, and then sintering. 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 upto 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

含结晶水氧化镍矿经高炉冶炼镍铁工艺 技术领域- 本发明涉及高炉冶炼工艺， 特别是含结晶水氧化镍矿经高炉冶 炼镍铁工艺。 背景技术：  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast furnace smelting process, particularly a process for smelting ferronickel by blast furnace containing crystallization of water nickel oxide ore. 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 白勺最主要元素——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 经过近百年连续开釆， 目前储量不足， 资源呈现危机。迫使人们对占 他球镍资源 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 f低品位的红土镍矿多釆用湿法冶炼， 即硫酸浸泡的方法，将红土镍 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 development, the current reserves are insufficient and resources are in crisis. It is forcing people to pay more attention to the extraction of nickel metal from the laterite nickel ore (nickel oxide ore) which accounts for 70% of the nickel resources of the ball. The main reason why the laterite nickel ore has not been developed on a large scale for a long time is that the process for extracting nickel from such mineral deposits has high process cost, complicated process, low yield and serious pollution. At present, high-grade laterite nickel ore (with nickel content above 2. 0%) is generally used in smelting of ore furnaces. However, this process has disadvantages such as high power consumption, large environmental pollution, and low gap production. For low-grade red earth nickel ore, wet smelting, ie, sulfuric acid immersion, red earth nickel

¾ 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。 ifc工艺设备一次性投资大、 I 艺复杂、 周期长、 环境污染严重。 也可以 用高炉冶炼， 但由于红 上镍矿常伴生有 Cr203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、 毀炉的严重后果。 国内外 多家企业和研究机构对于红土镍矿经高炉一歩法冶炼成镍铁 （镍铁） 的工艺研究进行了很久， 但至今没有成功的 ί艮道。 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： 3⁄4 solid nickel oxide, chromium oxide, iron oxide, etc. are converted into liquid nickel sulfate, chromium sulfate, ferrous sulfate and other mixed solutions, and then nickel sulfate is separated therefrom, and only 1 to 2% of the total amount is formed by electrolysis. The metal nickel, the rest of the ingredients are discarded. Ifc process equipment has a one-time investment, complex I, long cycle, and serious environmental pollution. It can also be smelted in a blast furnace, but since the red nickel ore is often accompanied by a Cr 2 0 3 component, the melting point of chromium is high, so that the molten iron viscosity after melting Large, nickel-containing chrome-iron water can not flow smoothly, causing serious consequences of freezing furnaces and furnaces. Many domestic and foreign enterprises and research institutes have carried out research on the process of smelting nickel-iron (nickel-iron) by later blast furnace in the blast furnace, but there has been no successful 艮. 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， 提供一种含 §晶水的氧化镍矿经高 炉一步法冶炼镍铁工艺。  The present invention is directed to solving the above problems, and provides a one-step smelting process of nickel iron by a blast furnace containing nickel oxide ore.

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 containing crystallization water nickel oxide ore through a blast furnace, which mainly comprises the following steps:

将原矿破碎筛分，其中粒径小于 2腿的矿粉与焦粉、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 ore powder having a particle size smaller than 2 legs is sintered with the coke powder and the quick lime/limestone mixture to obtain a sintered ore;

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：  The sinter sinter, coke, limestone/lime, dolomite and fluorite are mixed and smelted to obtain ferronickel. The following additives and sinter weight ratio are:

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 to 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： 将一次烧结所得烧结矿块粉碎后经 3O0〜500目筛子筛分后进行 磁选得精矿粉； The process for smelting ferronickel containing crystallization water nickel oxide ore provided by the invention may further comprise the following steps: The sintered ore obtained by sintering once is pulverized, sieved through a 3000 to 500 mesh sieve, and then magnetically selected to obtain a 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 with the coke powder, quicklime/limestone mixture to obtain a sintered ore;

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 石混配迸行高炉冶炼得到镍铁。  The sintered ore after secondary sintering is mixed with coke, limestone/lime, dolomite and fluorite to obtain ferronickel blast furnace 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 of the nickel oxide ore and the weight ratio thereof are:

镍： 0. 5〜40/0； Nickel: 0. 5~4 0 / 0 ;

铬： 0. 3〜12%；  Chrome: 0. 3~12%;

铁： 7〜55%。  Iron: 7 to 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 O. 3〜10%  Fluorite O. 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 CaF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 >10%, and the CaF content in the fluorite is >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错形式存在，三氧化二铬的 点在 230CTC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络对炉温的影 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， 本发送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 ί ι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 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 trioxide, and the point of chromium oxide is around 230 CTC, 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 to the ferrochrome smelting ferronickel process provided by the invention can effectively reduce the influence of the enthalpy on the furnace temperature, improve the fluidity of the molten iron, and at the same time, because the smelting process provided by the invention The amount of fluorite added is strictly calculated, which can effectively avoid accidents such as burning of the hearth due to excessive fluorite addition. At the same time, the magnesium contained in the dolomite in the process provided by this transmission 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 above two additives. The one-step smelting process of the blast furnace provided by the invention has the advantages of short process flow, large continuous production and large output of nickel chrome and iron in the laterite nickel ore, and the resource utilization rate is high. 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^少。原料回收率高，收率分别为： 铁 97〜98%， 镍 99%， 铬 40〜50%。  After comparison, the blast furnace smelting process provided by the invention has low cost, and the traditional submerged arc 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, less powder. The raw material recovery rate is high, and the yields are: iron 97~98%, nickel 99%, chromium 40~50%.

具体实施方式：  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.

实施例中原矿选自阿尔巴尼亚进口的镍袼铁矿。  In the examples, the ore is selected from the group consisting of nickel-niobium ore 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 ore is crushed and sieved, wherein the ore powder having a particle diameter of less than 2 mm is sintered with the coke powder and the quicklime/limestone mixture to obtain a sintered ore;

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； 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； The sintered ore obtained by sintering once is pulverized, sieved through a 300-500 mesh sieve, and then magnetically selected to obtain a concentrate powder; Sintering the concentrate powder with the coke powder, quicklime/limestone mixture to obtain a sintered ore;

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 sintered ore sintered ore having a particle diameter of 10 to 50 mm is mixed 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 the chromite ore used are

Figure imgf000007_0001
Figure imgf000007_0001

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

Fe Ni Cr Ca Si  Fe Ni Cr Ca Si

1 9.01 4.23 10.29 16.17 19.14  1 9.01 4.23 10.29 16.17 19.14

2 23.14 3.60 7.39 14.19 16.32  2 23.14 3.60 7.39 14.19 16.32

3 33.83 2.97 7.10 13.24 16.10  3 33.83 2.97 7.10 13.24 16.10

4 46.83 2.51 5.48 12.31 14.26  4 46.83 2.51 5.48 12.31 14.26

5 55.59 2.13 3.62 7.25 4.77  5 55.59 2.13 3.62 7.25 4.77

6 65.51 0.63 0.33 3.67 2.59 高炉炉料组成 （重量 Kg) 如下表

Figure imgf000008_0001
6 65.51 0.63 0.33 3.67 2.59 Blast furnace charge composition (weight Kg) as shown in the following table
Figure imgf000008_0001

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

Figure imgf000008_0002
Figure imgf000008_0002

冶炼所得镍铁主要成分及含量 （重量％) 为:  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 15.10 33.11 0.060 0.0611 48.26 15.10 33.11 0.060 0.061

2 52.31 10.59 23.10 0.059 0.06O2 52.31 10.59 23.10 0.059 0.06O

3 64.58 8.32 22.38 0.058 0.0593 64.58 8.32 22.38 0.058 0.059

4 75.51 5.98 13.36 0.059 0.0624 75.51 5.98 13.36 0.059 0.062

5 85.29 3.24 7.09 0.057 0.0575 85.29 3.24 7.09 0.057 0.057

6 93.46 0.92 0.63 0.061 0.058 6 93.46 0.92 0.63 0.061 0.058

Claims

权利 要 求 书 Claim 1.一种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 containing crystallization of nickel oxide ore by a blast furnace, characterized in that: the blast furnace smelting process mainly comprises the following steps: 将原矿破碎筛分，其中粒径小于 2mmi)勺矿粉与焦粉、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 particle size is less than 2 mmi), the spoon mineral powder is mixed with the coke powder and the quick lime/limestone mixture to obtain a sintered ore; 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：  The sinter sinter, coke, limestone/lime, dolomite and fluorite are mixed and smelted to obtain ferronickel. The following additives and sinter weight ratio are: 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 to 35%. 2.如权利要求 1所述的含结晶水氧化镍矿经高炉冶炼镍铁工 ¾, 其中所述高炉冶炼工艺还包括如下^骤：  2. The crystallization-containing nickel oxide ore according to claim 1 which is smelted by a blast furnace, wherein the blast furnace smelting process further comprises the following steps: 将烧结矿块粉碎后经 300〜500目筛子筛分后进行磁选得精矿粉； 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；  The sinter ore is pulverized and sieved through a 300-500 mesh sieve to obtain a fine ore powder; the concentrate powder is mixed with the coke powder, the quicklime/limestone mixture to obtain a sintered ore; 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/lime, dolomite and fluorite to carry out blast furnace smelting to obtain ferronickel. 3.如权利要求 1或 2所述的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%; 铬： 0. 3〜12%； 铁： 7〜55%。 3. The containing of claim 1 or claim 2 crystal water by blast furnace smelting nickel oxide, nickel-iron process, wherein the main component of nickel oxide ore and the weight ratio: Ni: 0. 5~4%; Cr: 0. 3~12%; Iron: 7~55%. 4.如权利要求 1或 2所述的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： 萤石 0. 3〜10% The process for smelting nickel iron in a blast furnace containing crystallization water nickel oxide ore according to claim 1 or 2, wherein the weight ratio of the additive to the sintered ore is preferably: 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%. 5.如权利要求 1或 2所述的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； 于50%，生石灰中 CaO含量大于 80%。  The process for smelting nickel-iron in a blast furnace containing crystallization water nickel oxide ore according to claim 1 or 2, wherein the CaO content in the limestone is 50%, and the CaO content in the quicklime is more than 80%. 6.如权利要求 1或 2所述的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 nickel iron in a blast furnace comprising a water-crystalline nickel oxide ore according to claim 1 or 2, wherein the dolomite has a Mg content of > 10%. 7.如权利要求 1或 2所述的含结晶水氧化镍矿经高炉冶炼镍铁 工艺， 其中所述萤石中 CaF含量〉 80%。  The process for smelting ferronickel containing crystallization of water-containing nickel oxide ore according to claim 1 or 2, wherein the fluorite has a CaF content of > 80%.
PCT/CN2005/001828 2005-09-16 2005-11-02 A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace Ceased WO2006045254A1 (en)

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