CN102553717A - Beneficiation process for high-sulfur hematite - Google Patents
Beneficiation process for high-sulfur hematite Download PDFInfo
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Abstract
Provided is a beneficiation process for high-sulfur hematite, which is characterized in that two-section continuous ball-milling and screening are performed on the raw ore, magnetic separation is performed on the discharged ore, anion reverse flotation roughing is performed on magnetic-separated concentrate, anion reverse flotation agents are added, anion reverse flotation choiceness is performed on anion reverse flotation roughing concentrate, anion reverse flotation choiceness tailings are combined with anion reverse flotation roughing tailings and then are subjected to anions reverse flotation scavenging, cation reverse flotation roughing is performed on anion reverse flotation scavenging concentrate, collector dodecylamine is added, cation reverse flotation choiceness is performed on cation reverse flotation roughing concentrate, collector dodecylamine is added, cation reverse flotation choiceness concentrate and anion reverse flotation choiceness concentrate are combined into final iron ore concentrate, and anion reverse flotation scavenging tailings, cation reverse flotation roughing tailings, cation reverse flotation choiceness tailings and strong magnetic tailings are finally combined into final tailings. The beneficiation process for high-sulfur hematite improves content of iron, reduces content of silicone and sulfur and provides high-quality iron ore concentrate for steelmaking production and is suitable for beneficiation of high-sulfur magnetite.
Description
Technical field
The present invention relates to the technique of preparing field, particularly a kind of high-sulfur rhombohedral iron ore beneficiation technics.
Background technology
Fast development along with steel and iron industry; The iron ore demand rises year by year; Compare with world's iron ore resource, the iron ore resource total amount of China is more, but iron ore poor quality, complex structure, disseminated grain size are thin, the iron mineral kind is not single; Rich ore content is few, and 97.5% ore needs can utilize after the ore dressing.Present sulfur mass fraction is called the high-sulfur bloodstone greater than 0.3 bloodstone stone.The high-sulfur bloodstone can be discharged the sulfur dioxide gas atmosphere pollution in steel-making, the too high meeting of sulfur-bearing becomes fragile steel in the steel simultaneously, so countries in the world steel plant all make great efforts to improve through the content that reduces sulphur in the iron ore quality of iron and steel.
Existing sulfur method has physics method, chemical method and bioanalysis.The sulfur method that generally adopts in the industry at present is the physics method, promptly through washing, like gravity treatment, magnetic separation, flotation or its combined process flow, makes iron, the two resources of sulphur obtain reasonable use.And the difficulty that adopts the physics method to make iron ore propose the iron desulfurization is how to use method for floating separation of iron mineral and sulfur mineral.Because the sulfur mineral in the ore mainly exists with the pyrite form, the general floating agent that adopts is xanthate and 2
#Oil.The method that iron mineral separates with sulfur mineral has two kinds, and a kind of is to select iron mineral to select sulfur mineral before earlier, but because 2
#The oil frothing capacity is strong, and medicament itself is also longer action time, selects the medicament that remains in behind the sulphur in the ore pulp that the silicon operation is fallen in follow-up flotation and impacts; Occur chats at the scene in the actual production and return the phenomenon that foam is more, be difficult for froth breaking; And along with chats constantly returns, the foam that swims in the ore pulp surface increases the foam volume of roughly selecting operation, and selectivity variation, the assorting room of medicament are affected; Finally have influence on iron concentrate grade, so select xanthate as selecting the sulphur medicament.Second kind is to select sulfur mineral after selecting iron mineral earlier, owing to select the starch that adds in the iron process, pyrite is had inhibitory action, and the sulphur in the iron ore concentrate is difficult to remove, so normally select sulfur mineral earlier.
At present; Iron ore is carried the more employing anion reverse floatation of Fe and reducing Si; It is strong and can be through the control of a plurality of medicament variablees realization flotation operations in floatation process that the anion collecting agent has selectivity; But anion reverse floatation generally adopts the normal temperature beneficiation collecting agent at present, requires temperature about 30 ℃, just can have good ore dressing effect.Under the situation of north of china in winter; Adopt anion reverse floatation technology to carry Fe and reducing Si, effect is undesirable, and cation-collecting agent has the good low-temperature resistance performance; Can about 10 ℃, realize commercial production, thereby save that the expense of heating is fallen, low production cost and floating agent system be simple.
At present, in the ore-dressing technique of high-sulfur bloodstone, when carrying iron, should fall silicon and fall sulphur again, temporarily also not have instantiation.
Summary of the invention
The present invention provides a kind of high-sulfur rhombohedral iron ore beneficiation technics, its objective is when satisfying the iron concentrate grade and the rate of recovery, and the content of silicon and objectionable impurities sulphur in the reduction iron ore concentrate is for STEELMAKING PRODUCTION provides high-quality iron ore concentrate.
The objective of the invention is to realize through following technical proposals:
High-sulfur rhombohedral iron ore beneficiation technics of the present invention; It is characterized in that with grade be 30-33%, sulfur mass fraction carries out two sections continuous ore grindings greater than 0.3% high-sulfur bloodstone raw ore; Be milled to granularity and feed magnetic separation for the product of-200 order content more than 90%, adopt anion reverse floatation to fall sulphur to the magnetic concentrate that obtains and fall silicon, the concentrate that the anion reverse floatation that obtains is scanned adopts cation reverse flotation to carry Fe and reducing Si; The final high-quality iron ore concentrate that obtains, concrete steps are following:
1) with grade be 30-33%, sulfur mass fraction feeds two sections continuous ball millings greater than 0.3% high-sulfur bloodstone raw ore, screening,
2) its granularity is fed weak magnetic for the ore discharge of-200 order content more than 90%, the mine tailing of weak magnetic feeds strong magnetic,
3) concentrate of low intensity magnetic separation merges with the concentrate of high intensity magnetic separation that to have obtained the iron grade be that 43.0%-47.30%, sulfur content are that the rough concentrate of 0.6%-1.0% feeds anion reverse floatation and roughly selects; And adding desulfurizing agent butyl xanthate 80-100g/t; PH adjustment agent NaOH 950-1150g/t, inhibitor DF 450-800g/t, activator CaO 320-420g/t; Collecting agent 600-1000g/t
4) it is selected that the concentrate that the anion reverse floatation that obtains is roughly selected feeds anion reverse floatation, and add collecting agent 300-500g/t, and the mine tailing that the selected mine tailing of anion reverse floatation is roughly selected with anion reverse floatation feeds anion reverse floatation and scans,
5) concentrate that the anion reverse floatation that obtains is scanned feeds cation reverse flotation and roughly selects, and adds collecting agent lauryl amine 30-80g/t,
6) it is selected that the concentrate that the cation reverse flotation that obtains is roughly selected feeds cation reverse flotation; And adding collecting agent lauryl amine 10-30g/t; The selected concentrate of concentrate that cation reverse flotation is selected and anion reverse floatation is combined into final iron ore concentrate; Its grade is 67.0-67.3%, sulfur content 0.030-0.040%, SiO
2The selected mine tailing of mine tailing that the mine tailing that content 3.3-4.5%, anion reverse floatation scan, cation reverse flotation are roughly selected and cation reverse flotation constitutes flotation tailing, and this flotation tailing is combined into true tailings, its grade 12.0-14.5% with strong magnetic tail ore deposit.
The characteristics of high-sulfur rhombohedral iron ore beneficiation technics of the present invention are:
1, only uses pyritous collecting agent butyl xanthate, and utilize the frothing capacity of anion collecting agent,, on the iron ore concentrate desulfurization method, important breakthrough is arranged pyrite and silica emersion together.In addition, in sweetening process, do not add 2
#Oil need not consider that significant foam that the oils foaming agent produced to selecting the influence of iron process, has reduced reagent cost, has simplified technological process;
2, anion reverse floatation is scanned the concentrate employing cation reverse flotation of acquisition, can obtain the sub-fraction iron ore concentrate again, improves the concentrate rate of recovery;
3, because anion reverse floatation has obtained most of iron ore concentrate in advance, thus the ore deposit amount that gets into the cation reverse flotation operation reduced, thus reduced the cation reverse flotation dosing;
4, in technological process; Because sulphur is mainly discharged from the anion reverse floatation froth pulp; And every section mine tailing is returning to last operation not all; The concentrate that anion reverse floatation is scanned gained carries out cation reverse flotation and selects, has both guaranteed the further recovery to iron ore concentrate, guaranteed simultaneously iron ore concentrate than low sulfur content;
5. employed collecting agent is the low temperature collecting agent in anion reverse floatation technology, and the slurry temperature during flotation is 10-15 ℃.
The present invention had both fallen silicon when carrying iron, fall sulphur again, and the grade of its iron ore concentrate is 67.0-67.3%, sulfur content 0.030-0.040%, SiO
2Content 3.3-4.5% is for STEELMAKING PRODUCTION provides high-quality iron ore concentrate.Iron recovery reaches 84.04-91.00% simultaneously, has improved economic benefit.And the present invention also is applicable to sorting of high-sulfur magnetic iron ore.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present invention.
As shown in Figure 1; High-sulfur rhombohedral iron ore beneficiation technics of the present invention; It is characterized in that with grade be 30-33%, sulfur mass fraction carries out two sections continuous ore grindings greater than 0.3% high-sulfur bloodstone raw ore, is milled to granularity and feeds magnetic separation for the product of-200 order content more than 90%, its strong magnetic tail mineral products rate is 35%-40%; Grade is 8-10%, and having obtained the iron grade at last is that 43.0%-47.30%, sulfur content are the rough concentrate of 0.6%-1.0%.Adopt anion reverse floatation to fall sulphur the magnetic separation rough concentrate that obtains and fall silicon, the concentrate that the anion reverse floatation that obtains is scanned adopts cation reverse flotation to carry Fe and reducing Si, finally obtains the high-quality iron ore concentrate.Concrete steps are following:
Embodiment one:
1) be that 30.5% high-sulfur bloodstone raw ore feeds two sections continuous ball millings with grade, screening,
2) its granularity feeds weak magnetic for the ore discharge of-200 order content more than 90%, and the mine tailing of weak magnetic feeds strong magnetic,
3) concentrate of the concentrate of weak magnetic and strong magnetic merge obtained that the iron grade is 45.30%, sulfur content is 0.85%, SiO
2Content is that 26.82% rough concentrate feeds anion reverse floatation together and roughly selects, and adds desulfurizing agent butyl xanthate 80-100g/t, PH adjustment agent NaOH 950-1150g/t; Inhibitor DF 450-800g/t; Activator CaO 320-420g/t, collecting agent 600-1000g/t
4) it is selected that the concentrate that the anion reverse floatation that obtains is roughly selected feeds anion reverse floatation, and add collecting agent 300-500g/t, and the mine tailing that the selected mine tailing of anion reverse floatation is roughly selected with anion reverse floatation feeds anion reverse floatation and scans,
5) grade that obtains is 50.2-53.1%, sulfur content is 0.03-0.05%, SiO
2Content is that concentrate that 8.5-9.1% anion reverse floatation is scanned feeds cation reverse flotation and roughly selects, and adds collecting agent lauryl amine 30-80g/t,
6) it is selected that the concentrate that the cation reverse flotation that obtains is roughly selected feeds cation reverse flotation; And adding collecting agent lauryl amine 10-30g/t; The selected concentrate of concentrate that cation reverse flotation is selected and anion reverse floatation is combined into final iron ore concentrate; Its grade is 67.15-67.20%, and sulfur content is 0.035-0.040%, SiO
2Content is 3.5-4.2%, and the selected mine tailing of mine tailing that the mine tailing that anion reverse floatation is scanned, cation reverse flotation are roughly selected and cation reverse flotation constitutes flotation tailing, and this flotation tailing is combined into true tailings with strong magnetic tail ore deposit, and its grade is 12.82-14.20%.
Embodiment two:
1) be that 33% high-sulfur bloodstone raw ore feeds two sections continuous ball millings with grade, screening,
2) its granularity feeds weak magnetic for the ore discharge of-200 order content more than 90%, and the mine tailing of weak magnetic feeds strong magnetic,
3) concentrate of the concentrate of weak magnetic and strong magnetic merges that to have obtained the iron grade be 47.30%, and sulfur content is 1.0%, SiO
2Content is that 25.42% rough concentrate feeds anion reverse floatation together and roughly selects, and adds desulfurizing agent butyl xanthate 80-100g/t, PH adjustment agent NaOH 950-1150g/t; Inhibitor DF 450-800g/t; Activator CaO 320-420g/t, collecting agent 600-1000g/t
4) it is selected that the concentrate that the anion reverse floatation that obtains is roughly selected feeds anion reverse floatation, and add collecting agent 300-500g/t, and the mine tailing that the selected mine tailing of anion reverse floatation is roughly selected with anion reverse floatation feeds anion reverse floatation and scans,
5) grade that obtains is 53.3-55.6%, sulfur content is 0.035-0.053%, SiO
2Content is that concentrate that 8.0-8.9% anion reverse floatation is scanned feeds cation reverse flotation and roughly selects, and adds collecting agent lauryl amine 30-80g/t;
6) it is selected that the concentrate that the cation reverse flotation that obtains is roughly selected feeds cation reverse flotation; And adding collecting agent lauryl amine 10-30g/t; The selected concentrate of concentrate that cation reverse flotation is selected and anion reverse floatation is combined into final iron ore concentrate; Its grade is 67.3-67.42%, and sulfur content is 0.037-0.039%, SiO
2Content is 3.3-4.1%, and the selected mine tailing of mine tailing that the mine tailing that anion reverse floatation is scanned, cation reverse flotation are roughly selected and cation reverse flotation constitutes flotation tailing, and this flotation tailing is combined into true tailings with strong magnetic tail ore deposit, and its grade is 12.78-14.16%.
The present invention had both fallen silicon when carrying iron, fall sulphur again, and its grade of the grade of its iron ore concentrate is 67.0-67.3%, sulfur content 0.030-0.040%, SiO
2Content 3.3-4.5% is for STEELMAKING PRODUCTION provides high-quality iron ore concentrate.Iron recovery reaches 84-91.00% simultaneously, has improved economic benefit.And the present invention also is applicable to sorting of high-sulfur magnetic iron ore.
Claims (1)
1. high-sulfur rhombohedral iron ore beneficiation technics; It is characterized in that with grade be 30-33%, sulfur mass fraction carries out two sections continuous ore grindings greater than 0.3% high-sulfur bloodstone raw ore; Be milled to granularity and feed magnetic separation more than 90% for-200 purpose product contents account for; Obtain the crude iron concentrate through weak magnetic-high intensity magnetic separation process, adopt anion reverse floatation to carry iron to the magnetic separation crude iron concentrate that obtains and fall sulphur and fall silicon, the concentrate that the anion reverse floatation that obtains is scanned adopts cation reverse flotation to carry Fe and reducing Si; The final high-quality iron ore concentrate that obtains, concrete steps are following:
1) with head grade be 30-33%, sulfur mass fraction feeds two sections continuous ball millings greater than 0.3% high-sulfur bloodstone stone, screening,
2) ore discharge that its granularity is accounted for more than 90% for-200 purpose product contents feeds low intensity magnetic separation, and the mine tailing of weak magnetic feeds high intensity magnetic separation,
3) concentrate of low intensity magnetic separation merges with the concentrate of high intensity magnetic separation that to have obtained the iron grade be that 43.0%-47.30%, sulfur content are that the rough concentrate of 0.6%-1.0% feeds anion reverse floatation and roughly selects; And adding desulfurizing agent butyl xanthate 80-100g/t; PH adjustment agent NaOH 950-1150g/t, inhibitor DF 450-800g/t, activator CaO 320-420g/t; Low temperature collecting agent 600-1000g/t
4) it is selected that the iron ore concentrate of the anion reverse floatation that obtains being roughly selected feeds anion reverse floatation, and add collecting agent 300-500g/t, and the mine tailing that the selected mine tailing of anion reverse floatation is roughly selected with anion reverse floatation feeds anion reverse floatation and scans,
5) concentrate that the anion reverse floatation that obtains is scanned feeds cation reverse flotation and roughly selects, and adds collecting agent lauryl amine 30-80g/t,
6) it is selected that the concentrate that the cation reverse flotation that obtains is roughly selected feeds cation reverse flotation; And adding collecting agent lauryl amine 10-30g/t; The selected concentrate of concentrate that cation reverse flotation is selected and anion reverse floatation is combined into final iron ore concentrate; Its grade is 67.0-67.3%, sulfur content 0.030-0.040%, SiO
2The selected mine tailing of mine tailing that the mine tailing that content 3.3-4.5%, anion reverse floatation scan, cation reverse flotation are roughly selected and cation reverse flotation constitutes flotation tailing, and this flotation tailing is combined into true tailings, its grade 12.0-14.5% with strong magnetic tail ore deposit.
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| CN104069937A (en) * | 2014-05-16 | 2014-10-01 | 马钢集团设计研究院有限责任公司 | Ore dressing method for removing pyrrhotite from iron ore |
| CN104259014A (en) * | 2014-09-05 | 2015-01-07 | 吉首大学 | Rotor cyclone two-stage tandem type mineral flotation and defoaming device |
| CN104259009A (en) * | 2014-08-08 | 2015-01-07 | 西北矿冶研究院 | Copper-iron-sulfur separation composite inhibitor and high-sulfur refractory copper-iron ore beneficiation method |
| CN104624383A (en) * | 2014-12-09 | 2015-05-20 | 鞍钢集团矿业公司 | Hematite reverse flotation inhibitor and preparation and use method thereof |
| CN105324497A (en) * | 2013-06-27 | 2016-02-10 | 株式会社神户制钢所 | Production method for low-sulfur iron ore |
| CN106345605A (en) * | 2016-11-27 | 2017-01-25 | 玉溪大红山矿业有限公司 | Quality improvement and silicon reduction technology for superfine silicate type low-grade hard-dressing hematite roughing concentrate |
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| CN107051716A (en) * | 2017-06-14 | 2017-08-18 | 北京中矿东方矿业有限公司 | A kind of strong magnetic reverse flotation dephosphorization desiliconization ore-dressing technique of Gao Lin Caviar shape bloodstone |
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| CN105324497B (en) * | 2013-06-27 | 2017-05-31 | 株式会社神户制钢所 | The low manufacture method containing sulphur iron ore |
| CN105324497A (en) * | 2013-06-27 | 2016-02-10 | 株式会社神户制钢所 | Production method for low-sulfur iron ore |
| US10596578B2 (en) | 2013-06-27 | 2020-03-24 | Kobe Steel, Ltd. | Production method for low-sulfur iron ore |
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| CN104259009A (en) * | 2014-08-08 | 2015-01-07 | 西北矿冶研究院 | Copper-iron-sulfur separation composite inhibitor and high-sulfur refractory copper-iron ore beneficiation method |
| CN104259009B (en) * | 2014-08-08 | 2017-01-11 | 西北矿冶研究院 | Copper-iron-sulfur separation composite inhibitor and high-sulfur refractory copper-iron ore beneficiation method |
| CN104259014A (en) * | 2014-09-05 | 2015-01-07 | 吉首大学 | Rotor cyclone two-stage tandem type mineral flotation and defoaming device |
| CN104624383B (en) * | 2014-12-09 | 2017-02-01 | 鞍钢集团矿业有限公司 | Hematite reverse flotation inhibitor and preparation and use method thereof |
| CN104624383A (en) * | 2014-12-09 | 2015-05-20 | 鞍钢集团矿业公司 | Hematite reverse flotation inhibitor and preparation and use method thereof |
| CN106345605B (en) * | 2016-11-27 | 2019-10-18 | 玉溪大红山矿业有限公司 | A kind of low-grade difficulty of fine silicate-type selects red iron rougher concentration upgrading drop silicon technology |
| CN106345605A (en) * | 2016-11-27 | 2017-01-25 | 玉溪大红山矿业有限公司 | Quality improvement and silicon reduction technology for superfine silicate type low-grade hard-dressing hematite roughing concentrate |
| CN106733226A (en) * | 2016-12-19 | 2017-05-31 | 华北理工大学 | The pillar cation reverse flotation technique of Hematite |
| CN106733226B (en) * | 2016-12-19 | 2019-03-01 | 华北理工大学 | The pillar cation reverse flotation technique of Hematite |
| CN107051716A (en) * | 2017-06-14 | 2017-08-18 | 北京中矿东方矿业有限公司 | A kind of strong magnetic reverse flotation dephosphorization desiliconization ore-dressing technique of Gao Lin Caviar shape bloodstone |
| CN108355827A (en) * | 2018-02-09 | 2018-08-03 | 鞍钢集团矿业设计研究院有限公司 | Continuous Grinding magnetic weight flow processing mixed type iron ore technique |
| CN108355828A (en) * | 2018-02-09 | 2018-08-03 | 鞍钢集团矿业设计研究院有限公司 | The full permanent magnetism short route of Continuous Grinding handles mixed type iron ore technique |
| CN111744679A (en) * | 2020-07-10 | 2020-10-09 | 攀枝花学院 | Iron ore flotation method |
| CN111905918A (en) * | 2020-09-09 | 2020-11-10 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for preparing ultrapure iron concentrate by deep processing of commercial grade magnetite concentrate |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Angang Group Mine Company |