CN101550483A - Combined flow path processing method of laterite nickel - Google Patents

Combined flow path processing method of laterite nickel Download PDF

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Publication number
CN101550483A
CN101550483A CNA2009100944106A CN200910094410A CN101550483A CN 101550483 A CN101550483 A CN 101550483A CN A2009100944106 A CNA2009100944106 A CN A2009100944106A CN 200910094410 A CN200910094410 A CN 200910094410A CN 101550483 A CN101550483 A CN 101550483A
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nickel
ore
flotation
flow path
ball
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王炜
潘基泽
仇云华
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Yunnan Tin Group (holding) Co Ltd
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Yunnan Tin Group (holding) Co Ltd
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Priority to CNA2009100944106A priority Critical patent/CN101550483A/en
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Abstract

The present invention provides a new method of eduction-flotation (or eduction-magnetic separation-flotation) combined flow path for processing nickel oxide. The process is, crushing and milling the ore, adding chlorinating agent, reducing reagent, eduction auxiliaries, balling adhensive in a certain percentage, using ball shaping machine to produce balls of 8-15 mm, drying, using eduction furnace to bake at a temperature of 750-1100 DEG. When eduction is completed, crushing, then wet milling the ore slurry into a type of 200-300 holes in a certain percentage, using flotation machine (or magnetic separator -flotation machine ) to select clean nickel ore containing 10-18% nickel. The method has advantages of simple process, short flow path, low production cost, environment friendly, the method can improve recovery rate of nickel cobalt and make good use of limited resources, which has favorable application popularization foreground.

Description

A kind of combined flow path processing method of red soil nickel ore
Technical field
The invention belongs to the Non-ferrous Metallurgy field, relate to dissimilar red soil nickel ore chlorinations segregation reducing roasting-ore grinding-flotation (or magnetic-floating) treatment process.
Background technology:
Red soil nickel ore can be divided into 2 types, and a kind of is limonite type (irony ore deposit), is positioned at the top in mineral deposit, and iron height, nickel are low, and silicon, magnesium are lower, but cobalt contents is higher.Another kind is noumeite (magnesia ore deposit), is positioned at the bottom in mineral deposit, and silicon, Mg content are higher, and iron, cobalt contents are lower, but nickel content is higher.The nickeliferous low and ratio of components nickel sulfide ore complexity of red soil nickel ore many, carrying out enrichment by traditional ore-dressing technique, to be difficult to obtain the yield of concentrate and nickel very low; Simultaneously, because nickeliferous too low also being difficult to directly with simple metallurgical technology enrichment.Therefore, the exploitation red soil nickel ore is higher to the requirement of technology, also higher to the requirement of equipment.
Generally the treatment process of laterite (oxidation) nickel minerals has only three kinds at present: pyrogenic process, wet method and fiery wet method combination.
1, pyrogenic process nickel metallurgy iron process
Utilize the general technology of red soil nickel ore pyrometallurgical smelting ferronickel to be: at first with ore reduction to 50~150mm, send into dry kiln and be dried to that ore neither coheres and not too efflorescence, send calcination rotary kiln again, dry under 700 ℃ of temperature, preheating and calcining obtain calcining; Then calcining is added electric furnace, and add the volatile coal of calcining weight 10~30%, through 1000 ℃ retailoring, the thick Rhometal of output.The nearly all nickel and the oxide compound of cobalt all are reduced into metal in the process of electric furnace reduction melting, and the also principle of iron is adjusted by the add-on of coke; At last with thick Rhometal process blowing output finished product Rhometal.It is short that this technology has flow process, invests advantages such as little; But it also has the temperature of fusion height of furnace charge, required energy consumption height; Corrodibility is strong, the equipment requirements height; Product property is single, can only be used for stainless steel production; Shortcomings such as ferronickel is of low quality.
2, pyrogenic process nickel metallurgy sulfonium technology
The nickel matte technology specific implementation method of red soil nickel ore is similar to the processing mode of nickel sulfide ore.It produces ferronickel technology is in 1500~1600 ℃ of fusion process, adds sulphur, and output is hanged down nickel matte, produces high nickel matte by bessemerizing again.This product can use different processing modes, can make nickel rondelle, nickel powder and cathode nickel etc.But the precondition of this technology is that stable cheap sulphur source will be arranged, otherwise cost is too high.
3, wet method ammonia soaking technology
The ammonia soaking technology is to utilize nickel, cobalt to close with ammino and to be dissolved in the solution, and other impurity then is trapped in the slag, thereby nickel, cobalt selectivity are leached.Specifically be with the red soil nickel ore drying, grind, reducing roasting under 600~700 ℃ of temperature makes nickel, brill and part iron be reduced into alloy, and then soaks through 4 stage countercurrent ammonia, utilize nickel and cobalt to form the characteristic of joining, make valuable metals such as nickel, brill enter leach liquor with ammonia with thing.Leach liquor is through sulfide precipitation, mother liquor of precipitation of ammonium deironing again, ammonia still process, and output alkali formula single nickel salt, alkali formula single nickel salt changes into nickel oxide through calcining again, also can be through original production nickel powder also.The principal feature of this technology is to have avoided the influence of magnesium oxide and iron; But the nickel cobalt rate of recovery is low, is difficult to promote the use of.Up to the present, adopt the Ya Bulu refinery of the Australian QNI of only having of this art breading red soil nickel ore company and the Ni Jialuo smeltery of Cuba in the world.
4, wet method pressurized acid leaching
Under 250~270 ℃, the high-temperature and high-pressure conditions of 4~5MPa, with dilute sulphuric acid valuable metals such as nickel, brill are dissolved with iron, aluminium mineral, in subsequent reaction, control certain conditions such as pH value, impurity element hydrolysis such as iron, aluminium and silicon are entered in the slag, and nickel, cobalt selectivity enter solution.Leach liquor neutralizes, precipitates the high-quality nickel cobalt of output sulfide with the hydrogen sulfide reduction.Nickel cobalt sulfide is by the supporting output the finished product of traditional refinery practice.It is bigger that the technico-economical comparison of this technology is influenced by content, mineralogical characteristic, process water of ore grade, magnesium and aluminium etc., suitable treatment ore grade height, magnesium and aluminium content are low, iron mineral is based on the ore of pyrrhosiderite, not too are fit to handle the more ore of shale; And the easy fouling of autoclave courage and inner-walls of duct causes the useful volume of autoclave to reduce line clogging.
5, wet method normal pressure acidleach
The representative flow process of normal pressure acidleach is: raw ore is through broken, ore grinding, and through beneficiation enrichment, concentrate adds HCl and MgCl 2, carrying out adverse current under the condition of normal pressure and leach, leach liquor is after solid-liquid separation, and filtrate adds MgO carries out carrying out solid-liquid separation again behind the purifying and obtains mixed Ni, cobalt hydroxide, and gained filtrate is mainly contained MgCl 2Part filtrate cooperates with certain proportion with the HCl that thermal hydrolysis produces returns the leaching of normal pressure adverse current, the residual filtrate thermal hydrolysis obtains hydrochloric acid and MgO product, the normal pressure adverse current that turns back to hydrochloric acid leaches and uses, MgO can be according to actual needs, return in purifying and the Ni-Co precipitation and use, unnecessary MgO can be used as by-product and sells, to reduce production costs.Based on the variety of issue that pressurized acid leaching operation back is occurred, the proposition that normal pressure leaches is very attractive, but it still need be perfect in practice.
6, fiery wet method combined process
Pyrogenic process and wet method process combined are handled the factory of nickel oxide, the smeltery, big rivers and mountains that has only at present Japanese Usiminas in the world, its main processes is: raw ore is levigate and fine coal mixing briquetting, nodulizing drying and high temperature reduction roasting, roasted ore group is levigate again, and ore pulp carries out ore dressing (gravity treatment and magnetic separation) to be separated and obtain the Rhometal product.The maximum characteristics of this technology are that 85% energy in the energy consumption is provided by coal, thereby production cost is low.And the energy consumption of thermal process electrosmelting is provided by electric energy more than 80%, and both energy consumption cost price differences are very big.But the problem that this technology exists is also many, though the smeltery, rivers and mountains is through repeatedly improving greatly, Technology is still stable inadequately, and process its industrial scale decades still rests on produces about 10,000 tons in nickel per year.
People such as Wang Yunhua have proposed the technical scheme (application number 200610163831.6) of the reduction-grinding concentration treatment of dissimilar red soil nickel ores in Chinese patent literature.The present invention relates to a kind of technology that from red soil nickel ore, reclaims nickel, red soil nickel ore is through broken and levigate, by a certain percentage, add carbonaceous reducing agent, composite additive and red soil nickel ore mix grinding, become pelletizing 15~20mm with ball egg shaping mechanism, at 200~400 ℃ of drying 4~6h, adopt the rotary kiln reducing roasting, temperature is controlled at 950~1300 ℃.After the reducing roasting, carry out slightly breaking, then by certain ore pulp proportioning, after carrying out wet ball grinding, adopt shaking table to carry out gravity treatment, the nickel ore concentrate that gravity treatment obtains adopts 3000~5000 Gausses' magnetic separator to sort again, just obtain high-grade ferronickel collective concentrate, it is nickeliferous to reach 7~15%.This technical scheme has that adaptability to raw material is strong, technical process is short, environmental friendliness, with coal as main energy sources, electric power that need not be expensive provides a kind of new method as characteristics such as the energy for handling dissimilar red soil nickel ores, has good application and promotion prospect.But this scheme exists the following problem that haves much room for improvement in follow-up application: (1) owing to adopt the rotary kiln reducing roasting, therefore the temperature that needs is higher, and it is high that power consumption appears in corresponding meeting, and production cost increases; (2) can lose parts of fine grade concentrate at sorting process, because can cause the fine fraction of part 37 μ m from gravity tailings, to lose when carrying out gravity treatment earlier, cause last nickel recovery to be subjected to certain reduction, the ferronickel collective concentrate finally only can reach 7~15% under perfect condition; (3) special processing method has determined need adopt stronger magneticstrength when magnetic concentration working, and magnetizing current is corresponding bigger, and power consumption is also more, is unfavorable for that the energy-conservation of enterprise tap the latent power.
In sum, thermal process is handled nickel oxide ore production Rhometal and is had the flow process weak point, the efficient advantages of higher, but energy consumption is higher, it is energy consumption that maximum in its running cost constitutes item, as adopt electrosmelting, only power consumption just accounts for 50% of running cost, add the preceding drying of oxidation nickel minerals melting again, the fuel consumption of roasting pretreatment technology, energy consumption cost in the running cost accounts for more than 65% possibly, low-grade red soil nickel ore is owing to smelt ore amount fire energy consumption height in handling with thermal process, smelting cost is higher, so thermal process is mainly handled high-grade nickel laterite at present.The main method of low ore grade nickel laterite is a wet processing in handling at present, though lower than pyrogenic process on the cost, wet processing nickel oxide ore complex process, long flow path, processing condition are to the equipment requirements height.From angle energy-conservation, low-cost and comprehensive utilization (handling low-grade nickel oxide ore) nickel resources, fiery wet method combined process is to be worth further research and extension.
Summary of the invention:
The combined flow path processing method that the purpose of this invention is to provide a kind of red soil nickel ore, can obtain the material that nickel and cobalt containing is of high grade, the nickel cobalt rate of recovery is high, it is simple to have technology, flow process is short, production cost is low, environmental friendliness, nickel cobalt rate of recovery height, effectively utilize limited resources, use and the wide advantage of promotion prospect.
The present invention finishes according to the following steps:
With ore reduction, levigate, add chlorizating agent, reductive agent, auxiliary agent, group's ball binding agent in the ratio of calculating, make the pelletizing of 8~15mm with ball egg shaper, through super-dry, adopt the roasting of segregation stove, temperature is controlled at 750~1100 ℃, carry out fragmentation after the reducing roasting, be modulated into ore pulp then and carry out wet grinding to 200~320 orders, adopt flotation machine to sort, obtain nickeliferous 10~18% nickel ore concentrate.
Described chlorizating agent is technical grade calcium chloride or water-containing crystal MgCl 2, reductive agent is fineness 60 purpose coking coal powders, binding agent is a lime; The roasting of described segregation stove is controlled at 750~900 ℃ and 950~1100 ℃ two sections to be carried out, the ball sphere diameter 8~15mm of group, and group's ball thermal zone residence time in stove is 60~120 minutes; Described wet ball-milling ore grinding mass concentration is controlled at 50~60%, and grinding particle size is controlled at 200 order to 320 orders.
Allocate the ratios preparation of 6~9 gram chlorizating agents, 2~4 gram reductive agents, 1~2 gram auxiliary agent, 1~2 gram unslaked lime during group ball material in per 100 gram mineral aggregates.
Add flotation reagent after group's ball fine grinding and stir, regulate pH values of pulp to 8~10, send into flotation machine emersion nickel-containing material.Described flotation reagent is selected from collecting agent (butyl xanthate, butylamine black powder, oleic acid or oxidized paraffin wax soap, hydroximic acid), adjusts agent (sodium sulphite, copper sulfate, sodium humic acid, Na 2CO 3, water glass), pore forming material (pine tar) etc.Perhaps rolling into a ball after the ball fine grinding earlier with magneticstrength is that 1000~3000 Gausses' magnetic separator is selected metallic nickel or Rhometal strongly magnetic material, and fine grinding is with identical flotation process emersion nickel-containing mineral again.
Above-mentioned flotation operation is an one roughing, secondary is scanned, recleaning, the selected nickel ore concentrate that contains that obtains nickeliferous+cobalt 5~10%, wherein, the product of scanning for the first time returns with for the first time selected product merging and roughly selects operation, the product of scanning for the second time returns into scanning for the first time operation, and selected product returns selected operation for the first time for the second time, and promptly order is returned the mode of an operation, the selected nickel-containing material that obtains nickeliferous+cobalt 10~18% for the second time, nickel recovery 80~88%; Perhaps, magnetic concentration working is through one roughing, once purging selection, primary cleaning, obtain containing the ferronickel material, further sort after the material fine grinding with flotation, flotation through one roughing, scan for two to three times, primary cleaning, selected foam is a nickel ore concentrate, can obtain the nickel ore concentrate of nickeliferous+cobalt 10~18%.
The invention has the beneficial effects as follows: present method technology is simple, and flow process is short, and production cost is low, and environmental friendliness can obtain the nickel ore concentrate of nickel+cobalt 10~18%, nickel recovery 80~88%.Improve the rate of recovery of nickel cobalt greatly, effectively utilized limited resources, had good application and promotion prospect.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Embodiment 1:
Red soil nickel ore (the mixing ore deposit in magnesia ore deposit and irony ore deposit) raw ore chemical ingredients: Ni0.95~1.22%, Mg8.5~20.30%, Fe8.84~22.93%, Co0.03~0.075, Al0.094~3.56%, Si15.67~18.17%.
Processing condition: through the red soil nickel ore 1000g of seasoning, broken, ore grinding accounts for 98% to 100 orders, add 60 gram chlorizating agents, 30 gram reductive agents, 10 gram unslaked limes, 1 gram auxiliary agent, make 8~15mm pelletizing with ball egg shaper, employing rotary kiln segregation, the stove temperature is divided two warm areas, and temperature is respectively 750~850 ℃ and 1050~1100 ℃, roasting time 2h.After the segregation roasting, carry out fragmentation and wet grinding, the ore grinding mass concentration is 60%, and grinding particle size reaches 200 orders 90%, adopts behind the ball milling that flotation machine one roughing, secondary are scanned, recleaning, just obtains the nickel ore concentrate of nickel grade 10.50%, nickel recovery 82.6%.The flotation reagent kind and the consumption that use are: Na 2S1500g/t, water glass 700g/t, butyl xanthate 700g/t, pine tar 300g/t.
Embodiment 2:
Red soil nickel ore raw ore chemical ingredients: with embodiment 1.
Processing condition: segregation sinter process condition is with embodiment 1.After the segregation roasting, carry out fragmentation and wet grinding, the ore grinding mass concentration is 60%, and grinding particle size reaches 200 orders 95%, adopts behind the ball milling that flotation machine one roughing, secondary are scanned, recleaning, just obtains the nickel ore concentrate of nickel grade 11.10%, nickel recovery 83.05%.The flotation reagent kind and the consumption that use are: Na 2CO 31500g/t, water glass 700g/t, copper sulfate 600g/t, butylamine black powder 500g/t.
Embodiment 3:
Red soil nickel ore raw ore chemical ingredients: with embodiment 1.
Processing condition: segregation sinter process condition is with embodiment 1.After the segregation roasting, carry out fragmentation and wet grinding, ore milling concentration is 60%, and grinding particle size reaches 200 orders 65%, and group's ball is that 1500 Gausses' permanent magnetic separator is selected strongly magnetic material through one roughing, primary cleaning, once purging selection with magneticstrength earlier; The magnetic separation material is through ore grinding again, and grinding particle size reaches 320 orders 98%, through stirring, regulate pH values of pulp to 8~9, flotation machine one roughing, primary cleaning, scans for three times, obtains nickel ore concentrate.Nickel ore concentrate is nickeliferous+the ferronickel concentrate of cobalt 15.8%, and nickel recovery 85.16%.

Claims (5)

1, a kind of combined flow path processing method of red soil nickel ore, it is characterized in that finishing according to the following steps: with ore reduction, levigate, add chlorizating agent, reductive agent, auxiliary agent, binding agent in the ratio of calculating, make the pelletizing of 8~15mm with ball egg shaper, through super-dry, adopt the roasting of segregation stove, temperature is controlled at 750~1100 ℃, carries out fragmentation after the roasting, is modulated into ore pulp then and carry out wet grinding to 200~320 orders, adopt flotation machine to sort, obtain nickeliferous 10~18% nickel ore concentrate.
2, according to the combined flow path processing method of claims 1 described red soil nickel ore, it is characterized in that: described chlorizating agent is technical grade calcium chloride or water-containing crystal MgCl 2, reductive agent is fineness 60 purpose coking coal powders, binding agent is a lime; The roasting of described segregation stove is controlled at 750~900 ℃ and 950~1100 ℃ two sections to be carried out, the ball sphere diameter 8~15mm of group, and group's ball thermal zone residence time in stove is 60~120 minutes; Described wet ball-milling ore grinding mass concentration is controlled at 50~60%, and grinding particle size is controlled at 200 order to 320 orders.
3, according to the combined flow path processing method of claims 1 described red soil nickel ore, it is characterized in that: group's ball material is allocated the ratio preparation of 6~9 gram chlorizating agents, 2~4 gram reductive agents, 1~2 gram auxiliary agent, 1~2 gram unslaked lime in per 100 gram mineral aggregates.
4, according to the combined flow path processing method of claims 1 described red soil nickel ore, it is characterized in that: add flotation reagent after group's ball fine grinding and stir, regulate pH values of pulp to 8~10, send into flotation machine emersion nickel-containing material; Be that 1000~3000 Gausses' magnetic separator is selected metallic nickel or Rhometal strongly magnetic material with magneticstrength earlier perhaps, fine grinding is with identical flotation process emersion nickel-containing mineral again.
5, according to the combined flow path processing method of claims 3 described red soil nickel ores, it is characterized in that: flotation operation is an one roughing, and secondary is scanned, recleaning, the selected nickel ore concentrate that contains that obtains nickeliferous+cobalt 5~10%; Perhaps magnetic concentration working is through one roughing, and once purging selection, primary cleaning obtain containing the ferronickel material, further sort after the material fine grinding with flotation, flotation through one roughing, scan for two to three times, primary cleaning, obtain the nickel ore concentrate of nickeliferous+cobalt 10~18%.
CNA2009100944106A 2009-04-28 2009-04-28 Combined flow path processing method of laterite nickel Pending CN101550483A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101912815A (en) * 2010-08-25 2010-12-15 中南大学 Magnetic separation method for gathering rich nickel and cobalt from chloridized and separated low-grade laterite
CN102108438A (en) * 2011-02-12 2011-06-29 西安建筑科技大学 Method for producing pellets from laterite-nickel ore
CN102600981A (en) * 2012-03-20 2012-07-25 昆明理工大学 Flotation classification method of low-grade composite nickel oxide ores
CN103233114A (en) * 2013-04-28 2013-08-07 江苏曦元金属材料有限公司 Method for producing nickel/ferrum from nickel laterite ores
CN103882222A (en) * 2014-04-16 2014-06-25 江西理工大学 Method for extracting nickel and cobalt from nickel laterite by chloride roasting
CN105671305A (en) * 2016-02-04 2016-06-15 福安市康齐动力科技有限公司 Method for chloridizing, roasting and reducing laterite-nickel ore through bittern to prepare ferro-nickel fine powder
CN106824552A (en) * 2016-12-21 2017-06-13 广西睿桂涵农业有限公司 A kind of beneficiation method of lateritic nickel ore
WO2017185946A1 (en) * 2016-04-26 2017-11-02 上海鑫和镍业科技有限公司 Method for processing low-grade laterite nickel ore and beneficiation method therefor
CN110106368A (en) * 2019-04-19 2019-08-09 长沙矿冶研究院有限责任公司 A kind of method of lateritic nickel ore indirect heating compound roasting-floating and enriching nickel cobalt
CN112126788A (en) * 2020-05-14 2020-12-25 中冶长天国际工程有限责任公司 Method for extracting nonferrous metals by using incineration fly ash of hazardous organic wastes

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101912815A (en) * 2010-08-25 2010-12-15 中南大学 Magnetic separation method for gathering rich nickel and cobalt from chloridized and separated low-grade laterite
CN102108438A (en) * 2011-02-12 2011-06-29 西安建筑科技大学 Method for producing pellets from laterite-nickel ore
CN102600981A (en) * 2012-03-20 2012-07-25 昆明理工大学 Flotation classification method of low-grade composite nickel oxide ores
CN103233114A (en) * 2013-04-28 2013-08-07 江苏曦元金属材料有限公司 Method for producing nickel/ferrum from nickel laterite ores
CN103882222A (en) * 2014-04-16 2014-06-25 江西理工大学 Method for extracting nickel and cobalt from nickel laterite by chloride roasting
CN103882222B (en) * 2014-04-16 2015-11-04 江西理工大学 Red soil nickel ore chloride salt baking extracts the method for nickel cobalt
CN105671305A (en) * 2016-02-04 2016-06-15 福安市康齐动力科技有限公司 Method for chloridizing, roasting and reducing laterite-nickel ore through bittern to prepare ferro-nickel fine powder
WO2017185946A1 (en) * 2016-04-26 2017-11-02 上海鑫和镍业科技有限公司 Method for processing low-grade laterite nickel ore and beneficiation method therefor
CN107309079A (en) * 2016-04-26 2017-11-03 上海鑫和镍业科技有限公司 A kind of method and its beneficiation method for handling low-grade laterite nickel ore
CN106824552A (en) * 2016-12-21 2017-06-13 广西睿桂涵农业有限公司 A kind of beneficiation method of lateritic nickel ore
CN106824552B (en) * 2016-12-21 2019-05-14 广西睿桂涵农业有限公司 A kind of beneficiation method of lateritic nickel ore
CN110106368A (en) * 2019-04-19 2019-08-09 长沙矿冶研究院有限责任公司 A kind of method of lateritic nickel ore indirect heating compound roasting-floating and enriching nickel cobalt
CN112126788A (en) * 2020-05-14 2020-12-25 中冶长天国际工程有限责任公司 Method for extracting nonferrous metals by using incineration fly ash of hazardous organic wastes

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