CN102226233B - Method and system for pretreating lateritic nickel ore - Google Patents
Method and system for pretreating lateritic nickel ore Download PDFInfo
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- CN102226233B CN102226233B CN2011101404352A CN201110140435A CN102226233B CN 102226233 B CN102226233 B CN 102226233B CN 2011101404352 A CN2011101404352 A CN 2011101404352A CN 201110140435 A CN201110140435 A CN 201110140435A CN 102226233 B CN102226233 B CN 102226233B
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Abstract
The invention relates to a method and system for pretreating lateritic nickel ore. The invention is implemented by baking, screening and crushing lateritic nickel ore with high water content. By using the technical scheme provided by the invention, water can be effectively removed from lateritic nickel ore with high water content and viscosity, and lump ore and fine ore are recycled respectively, thereby providing insurance for efficient utilization of lateritic nickel ore; and besides, the technological process and equipment are simple and accessible, so that the cheap lateritic nickel ore has large-scale industrial application prospects.
Description
Technical field
The present invention relates to field of metallurgy, be specifically related to a kind of method and treatment system that reduces the red soil nickel ore water cut of pretreatment stage before smelting.
Background technology
At present, China's nickel sulfide ore gradually reduces, and the red soil nickel ore exploitation is worth greatly and increases.Though the red soil nickel ore treatment process mainly is divided into wet method smelting process and pyrometallurgical smelting process, at present more sophisticated in the world wide to utilize the process method of red soil nickel ore smelting ferronickel alloy be main with pyrometallurgical smelting still.Utilize the method for red soil nickel ore pyrometallurgical smelting ferronickel to mainly contain blast furnace process, electric furnace process etc.
At home; In recent years adopt the pyrometallurgical smelting laterite nickel ore and producing ferronickel comparatively general; A large amount of low-grade and ultralow grade red soil nickel ores of import; A large amount of use nickeliferous below 2%, the low-grade or ultralow grade red soil nickel ore of minimum content 0.8%-1.0% particularly, the pyrometallurgical smelting laterite nickel ore and producing ferronickel has become one of topmost primary nickel source in the domestic stainless steel smelting.
Generally speaking, import red soil nickel ore average moisture content is 30～40%, can not directly smelt, and must carry out pre-treatment, removes the moisture in the red soil nickel ore.And contain some nickelic lump ores in the red soil nickel ore, for minute matter is utilized red soil nickel ore, the high value added utilization lump ore needs at pretreatment stage it to be sieved.Therefore, the pre-treatment step of red soil nickel ore is very necessary, can not only optimize and utilize red soil nickel ore, improves ferronickel output, cuts down the consumption of energy, and the pyrometallurgical smelting red soil nickel ore can be carried out.
Summary of the invention
Big for overcoming existing red soil nickel ore water cut, not tractable defective the invention provides a kind of pretreatment process of red soil nickel ore.
Said method comprising the steps of:
(1) red soil nickel ore is carried out the screening first time, sieve out the lump ore of diameter greater than 200mm;
(2) undersized nickel minerals is dried, and makes it keep the water cut of 6～8wt%;
(3) nickel minerals after the oven dry carries out the screening second time, sieves out the lump ore of diameter greater than 100mm;
(4) undersized fine ore gets into screening for the third time, sieves out diameter greater than the lump ore of 10mm and the diameter fine ore less than 10mm, and said diameter is stacked subsequent use less than the fine ore of 10mm.
Carry out dedusting after the said red soil nickel ore oven dry of step (2).
Step (1), (3) and (4) described lump ore adopt and be crushed to diameter step by step is that merging is subsequent use below the 10mm.
The present invention also provides a kind of pretreatment system of red soil nickel ore, comprises successively according to material transmission order: feeding machine, screening plant, drying plant, dust removal installation, screening plant and screening plant for the third time for the second time for the first time; Wherein, adjacent two equipment rooms transmit material by conveyor.
Said screening plant connects a jaw crusher separately, and the jaw crusher downstream connect same hammer mill, or said screening plant connects same jaw crusher, and the jaw crusher downstream connect same hammer mill; Wherein, adjacent two equipment rooms transmit material by conveyor.
Said screening plant is vibratory screening apparatus or roller screen, and said drying plant is stoving oven or drying kiln, and said dust removal installation is a sack cleaner.
Said drying kiln comprises a cylindric kiln body, is evenly distributed with the blocking material plate of high 20～35cm, wide 20～30cm on the inwall of said kiln body, each blocking material plate and on every side the distance between the blocking material plate be 20～30cm.
3～8 meters in said drying kiln inwall opening for feed to the kiln body, the top of each blocking material plate are provided with the iron chains of long a 30～80cm.
The blocking material plate of said drying kiln is the steel blocking material plate.
Said drying kiln also comprises powder Fuel lance and/or geseous fuel burner.
In the technical scheme according to the invention, red soil nickel ore contains some nickelic lump ores usually, and the present invention finds; The economic worth of lump ore is higher than common red soil nickel ore; Most of lump ore is nickeliferous up to more than 2.5%, and iron content 5～10% can be used as nickeliferous, iron or other micro-sources and joins and join.The lump ore volume is big and quality is hard, and therefore, the reply red soil nickel ore sieves step by step, adopts processing mode targetedly more separately.The red soil nickel ore fine ore can directly be stored up subsequent use or stir back subsequent use; Lump ore then carries out fragmentation through different disintegrating apparatus step by step; For example, can use the jaw crusher jaw broken earlier, re-use hammer-crusher and pulverize; Can reduce the loss of disintegrating apparatus, avoid the inhomogeneous disintegrating apparatus that causes of red soil nickel ore volume normally to move.
In the technical scheme according to the invention, for oven dry and the kiln of dry red soil nickel ore provide the pyritous thermal source to have 4 kinds: the one, residual heat resources such as the various waste gas that available heat can be provided, tail gas, flue gas; The 2nd, all gases fuel is like Sweet natural gas, LPG liquefied petroleum gas, coke-oven gas, coal gas of converter, blast furnace gas etc.; The 3rd, various solid fuels import kiln like flame behind the coal combustion, or directly coal injection burning in kiln; The 4th, various liquid fuels are like various oils products such as gasoline, kerosene, diesel oil, heavy oil, the liquid fuel of various non-oils such as alcohol.Wherein, from the consideration of cost and efficient, adopt the thermal source of first kind of form more economical; Next adopts second and third kind form; Therefore drying kiln according to the invention also comprises powder Fuel lance and/or geseous fuel burner, and different heat sources can be used separately, also can make up use.The water cut of oven dry back nickel minerals is the water cut of surface attachment water.
In the technical scheme according to the invention, gathering on the inwall of said drying kiln is provided with blocking material plate, because the viscosity of red soil nickel ore is bigger; Be not easy during oven dry to disperse; And be bonded in easily on the kiln wall, oven dry can't normally be carried out, also can cause scrapping of drying plant when serious.In order to overcome this technological deficiency, the present invention is provided with blocking material plate (like Fig. 4) on the wall within it, and the effect of play dispersion, stirring makes the red soil nickel ore fine ore separate with lump ore, and can be fast, oven dry equably.Opening for feed place at drying kiln; Red soil nickel ore agglutinating situation is particularly serious; For the effect of strengthening disperseing, stirring, the top of the blocking material plate at 3～8 meters all is provided with the soft iron chains (like Fig. 5) of a 30～80cm in drying kiln inwall opening for feed to kiln body, the effect of not only can play dispersion, stirring; Can also play shock absorption, alleviate of the impact of comparatively large vol lump ore the kiln body.
Technical scheme of the present invention is high to water cut, tough red soil nickel ore has good water removal effect; And realized that the nickelic lump ore of red soil nickel ore effectively separates with low nickel powder ore deposit; Make red soil nickel ore obtain utilization of branch matter and high value added utilization; And technical process and simple equipments, be easy to get, have the heavy industrialization Application Prospect.
Description of drawings
Fig. 1 is the process flow sheet of red soil nickel ore pretreatment process of the present invention;
Fig. 2 is one of synoptic diagram of red soil nickel ore pretreatment system of the present invention;
Fig. 3 be red soil nickel ore pretreatment system of the present invention synoptic diagram two;
Fig. 4 is the synoptic diagram of the inner section of drying kiln of the present invention;
Fig. 5 is the structural representation of drying kiln blocking material plate of the present invention.
Wherein, 1, feeding machine; 2, screening plant for the first time; 3, drying plant; 4, dust removal installation; 5, screening plant for the second time; 6, screening plant for the third time; 7, jaw crusher; 8, hammer mill; 30, drying kiln kiln body; 31, blocking material plate; 32, iron chains.
Embodiment
Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
(1) as shown in Figure 2, and moist red soil nickel ore (average nickeliferous 1.87%, iron 12%; Crystal water 21%; Attached water 15% contains 40% stone, wherein crosses more than the semidiameter 300mm; Be bonded among the red soil nickel ore), get into 1.2m * 6m apron feeder 1 (steel plate chain band structure) input B1000 feed belt through forklift.Raw material is sent into the vibratory screening apparatus 2 of 1.8m * 5.4m, and (sieve aperture 200 * 200mm) sieves out the nickelic lump ore of diameter greater than 200mm, and lump ore is transported to jaw crusher 7 and is crushed to less than 150mm.
(2) the vibratory screening apparatus undersize gets in the cylindric drying kiln 3 of 3.5 * 40m (diameter * length) through conveyor less than the red soil nickel ore of 200mm; Be evenly distributed with the steel blocking material plate 31 of high 20cm, wide 25cm on the inwall of drying kiln kiln body 30, each blocking material plate and on every side the distance between the blocking material plate be about 20cm.To going deep into intravital 7～8 meters of kiln, the top of each blocking material plate all is provided with a soft iron chain 32 that about 50cm is long from the opening for feed of drying kiln inwall, and shown in Figure 4 and 5, blocking material plate adopts steel structure.Red soil nickel ore is dried in drying kiln, and drying kiln adopts blast furnace gas as thermal source through the geseous fuel burner, makes nickel minerals keep the surface attachment water of 6～8wt%, avoids airborne dust in subsequent delivery and the screening process.Adopt common sack cleaner 4 to carry out dedusting after the drying course, efficiency of dust collection need be controlled at more than 95%.
(3) nickel minerals after the dedusting is transported to roller screen 5 through conveyor and carries out second time screening, sieves out the lump ore of diameter greater than 100mm, and lump ore is transported to jaw crusher 7, and to be crushed to diameter be 15～40mm.
(4) undersize of screening for the second time is transported to another roller screen 6 and gets into screening for the third time, sieves out diameter greater than the lump ore of 10mm and less than the fine ore of 10mm, and lump ore is transported to jaw crusher 7 and is crushed to diameter below 40mm.Diameter is directly stacked subsequent use less than the fine ore of 10mm or after simple process such as stirrer stirring, is stacked subsequent use.
(5) aforementionedly get into same hammer mill 8 through conveyor through the broken lump ore of jaw crusher, hammer broken to diameter be below the 10mm, stack subsequent use.
(1), in (3), (4) step lump ore not carry out jaw broken, all the other are with embodiment 1 step (1)～(4).
(5) aforementioned lump ore transfers to same jaw crusher 7 through belt, is crushed to diameter 50～100mm, gets into a hammer mill 8 again, hammer broken to diameter be below the 10mm, stack subsequent use, as shown in Figure 3.
Though used general explanation, embodiment and experiment in the preceding text, the present invention has been done detailed description, on basis of the present invention, can to some modifications of do or improvement, this will be apparent to those skilled in the art.Therefore, these modifications or the improvement on the basis of not departing from spirit of the present invention, made all belong to the scope that requirement of the present invention is protected.
Claims (7)
1. the pretreatment process of a red soil nickel ore is characterized in that, may further comprise the steps:
(1) red soil nickel ore is carried out the screening first time, sieve out the lump ore of diameter greater than 200mm;
(2) undersized nickel minerals is dried, and makes it keep the water cut of 6～8wt%;
(3) nickel minerals after the oven dry carries out the screening second time, sieves out the lump ore of diameter greater than 100mm;
(4) undersized fine ore gets into screening for the third time, sieves out diameter greater than the lump ore of 10mm and the diameter fine ore less than 10mm, and said diameter is stacked subsequent use less than the fine ore of 10mm;
Wherein, the described lump ore of step (1), (3) and (4) adopt be crushed to step by step diameter be merge below the 10mm subsequent use.
2. method according to claim 1 is characterized in that, carries out dedusting after the said red soil nickel ore oven dry of step (2).
3. the pretreatment system of a red soil nickel ore is characterized in that, comprises successively according to material transmission order: feeding machine, screening plant, drying plant, dust removal installation, screening plant and screening plant for the third time for the second time for the first time; Wherein, adjacent two equipment rooms transmit material by conveyor;
Said drying plant is a drying kiln, and said drying kiln comprises a cylindric kiln body, is evenly distributed with the blocking material plate of high 20～35cm, wide 20～30cm on the inwall of said kiln body, each blocking material plate and on every side the distance between the blocking material plate be 20～30cm;
3～8 meters in said drying kiln inwall opening for feed to the kiln body, the top of each blocking material plate are provided with the iron chains of long a 30～80cm.
4. pretreatment system according to claim 3; It is characterized in that said screening plant connects a jaw crusher separately, the jaw crusher downstream connect same hammer mill; Or said screening plant connects same jaw crusher, and the jaw crusher downstream connect same hammer mill; Wherein, adjacent two equipment rooms transmit material by conveyor.
5. according to claim 3 or 4 described pretreatment systems, it is characterized in that said screening plant is vibratory screening apparatus or roller screen, said dust removal installation is a sack cleaner.
6. pretreatment system according to claim 3 is characterized in that, the blocking material plate of said drying kiln is the steel blocking material plate.
7. pretreatment system according to claim 3 is characterized in that, said drying kiln also comprises powder Fuel lance and/or geseous fuel burner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101404352A CN102226233B (en) | 2011-05-27 | 2011-05-27 | Method and system for pretreating lateritic nickel ore |
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| CN2011101404352A CN102226233B (en) | 2011-05-27 | 2011-05-27 | Method and system for pretreating lateritic nickel ore |
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| CN102226233A CN102226233A (en) | 2011-10-26 |
| CN102226233B true CN102226233B (en) | 2012-11-21 |
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Families Citing this family (10)
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| CN102758093A (en) * | 2012-07-02 | 2012-10-31 | 张芃 | Smelting method for nickel oxide ore |
| CN105734277B (en) * | 2014-12-09 | 2019-05-28 | 张家彦 | Process the linked system and its process of lateritic nickel ore pellet |
| CN104962728A (en) * | 2015-06-30 | 2015-10-07 | 广西盛隆冶金有限公司 | Laterite-nickel ore preprocessing method |
| CN105170284A (en) * | 2015-09-21 | 2015-12-23 | 德保县新德誉选矿有限公司 | Bauxite dry-washing and screening system |
| CN106391442A (en) * | 2016-08-31 | 2017-02-15 | 安徽纽亚达科技有限责任公司 | Mica iron oxide dewatering, drying and screening device and using method thereof |
| CN106378302A (en) * | 2016-08-31 | 2017-02-08 | 安徽纽亚达科技有限责任公司 | Micaceous iron oxide drying and screening device |
| CN107245643A (en) * | 2017-04-19 | 2017-10-13 | 广西盛隆冶金有限公司 | A kind of sea sand ore deposit and lateritic nickel ore preprocess method |
| CN107899817A (en) * | 2017-11-23 | 2018-04-13 | 中山市君禾机电设备有限公司 | The recovery method and system of a kind of acrylic resin powder |
| CN115178467B (en) * | 2021-04-02 | 2023-06-23 | 中冶长天国际工程有限责任公司 | Lump ore pretreatment system and pretreatment method based on shaft tube type rotary kiln |
| CN115212984A (en) * | 2022-06-21 | 2022-10-21 | 黄石新兴管业有限公司 | Online crushing and screening equipment and process for large-particle-size nickel ores |
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| CN100478477C (en) * | 2007-07-09 | 2009-04-15 | 贵研铂业股份有限公司 | Method for extracting nickel iron alloy from laterite ore |
| CN101358281B (en) * | 2008-07-15 | 2010-07-21 | 朝阳昊天有色金属有限公司 | Lateritic ore preprocess method |
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