CN101862701B - Comprehensive processing method of high phosphorus-sulfur siderite - Google Patents
Comprehensive processing method of high phosphorus-sulfur siderite Download PDFInfo
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Abstract
The invention provides a comprehensive processing method of high phosphorus-sulfur siderite, which is characterized in that high-quality iron ore concentrate with grade of iron reaching more than 60 percent and recycling rate of iron reaching more than 70 percent is obtained through ore grinding, reverse-floatation desulphurization, reverse-floatation dephosphorization, scavenging dephosphorization, reduction roasting and ore grinding and low-intensity magnetic separation; moreover, the iron ore concentrate contains less than 0.08 percent phosphorous, less than 0.30 percent sulfur and less than 8 percent silicone, so the high phosphorus-sulfur siderite resource is reasonably utilized, and the problem of the contradiction of the supply and the demand of the iron ore resource can be thoroughly solved. The method is free from discharging any waste, the floated filter liquid is completely returned to be recycled in the process procedures, the floated sulfur-contained and phosphorous-contained foam is processed after being recycled to become valuables; therefore, the process is simple and convenient, the production cost is low, and the selection quality is high.
Description
Technical field
The present invention relates to a kind of processing method of siderite, especially a kind of integrated conduct method of high phosphorus-sulfur siderite belongs to the technique of preparing field.
Background technology
For higher siderites of impurity content such as phosphorus sulphur, experimental study both at home and abroad is a lot, but the example of input development and use seldom, and main cause is that mineral processing index is undesirable, high cost.After with single floatation process high phosphorus-sulfur siderite being carried out flotation, though certain effect is arranged, iron concentrate grade is lower, only is 32～37%, and the rate of recovery is 33～45%, and sulphur in the iron ore concentrate, phosphorus, silicone content are higher, and the utmost point is unfavorable for blast furnace process.
Chinese patent disclosed one in 2008 and has been called " low-grade and Complex Iron Ore method for efficiently separating " patent application (CN101413057), this patent application is that the Complex Iron Ore stone classification of different grades and kind is processed, obtain respectively lump ore and breeze, again fine ore is carried out pelletizing, drying, preheating, reduction roasting, after the cooling, through ore grinding, magnetic separation, perhaps through ore grinding, magnetic separation, reverse flotation, thereby obtain iron ore concentrate or reduced iron powder.Classification is processed and is referred to, that is: be that the iron ore of 50%-56% is after broken, screening with ferrous grade, drying and preheating is directly carried out in the ore deposit on the sieve that obtains, particulate breeze under the sieve then passes through ore grinding, washup, again after ore grinding, the desliming, sorting obtains iron ore concentrate and the sludge of iron content 58-60%, dewater after afterwards the sludge of washup, desliming and sorting being collected, drying, and add therein pelletizing behind the additive mixing; Through broken, screening, lump ore directly carries out drying and preheating on the sieve that obtains with the iron ore of ferrous grade 40%-50%, and the lower particulate breeze of sieve then obtains the fine iron ore powder through behind the dry milling, pelletizing behind the adding additive mixing in the fine iron ore powder; Be that the iron ore of 25%-40% is through broken, screening with ferrous grade, lump ore directly carries out drying and preheating on the sieve that obtains, particulate breeze under the sieve then obtains the crude iron fine powder through ore grinding, gravity treatment or high-gradient magnetic separation, reverse flotation, pelletizing behind the adding additive mixing in the crude iron fine powder.When the method that provides with this patent application was processed high phosphorus-sulfur siderite, will the emulate the advanced dephosphorization effect of capable reverse flotation work of the dephosphorization effect that carries out first the roasting operation was poor.
At present, the method of domestic processing siderite is mainly taked the again technique of magnetic separation of first roasting, such as large Xigou ditch, Shaanxi, during with the higher siderite of this single impurity contents such as disposal methods sulphur phosphorus, its product quality is difficult to reach requirement, be unfavorable for taking full advantage of of resource, more be difficult to solve the problem of present iron ore deposit imbalance between supply and demand.
Summary of the invention
For rationally utilizing the high phosphorus-sulfur siderite resource, thoroughly solve the problem of present iron ore deposit imbalance between supply and demand, improve iron concentrate grade and the rate of recovery, reduce sulphur, phosphorus, sila matter content in the iron ore concentrate, the invention provides a kind of integrated conduct method of high phosphorus-sulfur siderite.
The present invention solves the problems of the technologies described above the integrated conduct method that the technical scheme that adopts is a kind of like this high phosphorus-sulfur siderite, its process following process steps:
A, raw ore is carried out ore grinding, make the thin ore deposit of-320 purposes account for 90% above mass ratio;
B, adjust the ore grinding pH value to 4 of A step～6, temperature to 25～35 ℃ add xanthate by the amount in 300～600g/ ton ore deposit, and the amount in 50～100g/ ton ore deposit adds 2# oil, carries out reverse flotation desulfurizing, collection sulfur-bearing foam;
C, adjustment B step underflow pH value to 9～12, temperature to 25～35 ℃, amount by 900～1500g/ ton ore deposit adds aliphatic acid, the amount in 1900～2300g/ ton ore deposit adds waterglass, and the amount in 230～400g/ ton ore deposit adds starch, and the amount in 140～260g/ ton ore deposit adds alkali lignin, carry out the reverse flotation dephosphorization, collect phosphorous foam, underflow filters to get filter residue and filtrate, and filtrate send the regulating reservoir retrieval system to recycle;
D, in the phosphorous foam of C step, amount by 600～700g/ ton ore deposit adds aliphatic acid, the amount in 400～500g/ ton ore deposit adds waterglass, the amount in 50～100g/ ton ore deposit adds starch, the amount in 20～40g/ ton ore deposit adds alkali lignin, scans, and collects phosphorous foam, underflow filters to get filter residue and filtrate, and filtrate send the regulating reservoir retrieval system to recycle;
E, in the filter residue of C step, D step, add sodium carbonate or calcium carbonate by 3～6% mass ratio, the mass ratio by 5～9% adds coal dust, under 950～1100 ℃ of temperature, reduction roasting 1～2 hour gets the roasting reduction ore deposit;
F, account for 90% above mass ratio to-200 purposes with the roasting reduction ore deposit of E step is levigate, through conventional low intensity magnetic separation, obtain iron ore concentrate.
The reverse flotation desulfurizing of described B step carries out once at least, preferred secondary, and the flotation agent consumption successively decreases successively, and namely the flotation dosage used of reverse flotation desulfurizing is: xanthate 300～400g/ ton ore deposit, 2# oil 40～50g/ ton ore deposit; The flotation dosage that the secondary counter floatation desulphurization is used is: xanthate 50～150g/ ton ore deposit, 2# oil 20～40g/ ton ore deposit.
The reverse flotation dephosphorization of described C step carries out once at least, preferred secondary, and the flotation agent consumption successively decreases successively, namely the flotation dosage used of reverse flotation dephosphorization is: aliphatic acid 600～1000g/ ton ore deposit, waterglass 1500～1750g/ ton ore deposit, starch 220～350g/ ton ore deposit, alkali lignin 100～200g/ ton ore deposit; The flotation dosage that secondary counter flotation dephosphorization is used is: aliphatic acid 300～500g/ ton ore deposit, waterglass 400～600g/ ton ore deposit, starch 30～50g/ ton ore deposit, alkali lignin 40～60g/ ton ore deposit.
The xanthate of described B step, 2# oil are commercial conventional dose; Aliphatic acid in the C step, waterglass, starch, alkali lignin are commercial conventional dose.
The reduction roasting of described E step in conventional roaster, the routinely roasting finished of method of roasting.
The low intensity magnetic separation of described F step is finished with conventional weak magnetic separator.
Key of the present invention is:
1, the control mog reaches the effect of monomer dissociation by ore grinding, is conducive to improve the ore dressing quality, but overground, not only can increase production cost, can reduce mineral processing index simultaneously, so will control ore milling product, makes the thin ore deposit of-320 purposes account for 90% above mass ratio.
2, the pH value of control flotation step, it is improper that the pH value is adjusted, and the flotation operation index will be greatly affected even without sorting result, require reverse flotation desulfurizing step pH value to be controlled between 4～6, and the pH value is controlled between 9～12 in the reverse flotation dephosphorization step.
3, temperature also is an important influence factor in flotation step, keeps 25～35 ℃ of temperature can effectively increase the activity of beneficiation reagent, and the use amount of reduction medicament improves anti-floatation effeciency.
4, control flotation agent consumption, flotation agent can affect the floatation process index with quantity not sufficient, and flotation agent is excessive not only can influence index, can increase production cost simultaneously.
The present invention compared with prior art has following advantages and effect: adopt such scheme, can be with sulphur, the impurity such as phosphorus are selected in advance and are reclaimed through reverse flotation, iron mineral in the underflow after filtration, reduction roasting, levigate, low intensity magnetic separation, obtaining the iron grade reaches more than 60%, iron recovery reaches the high-quality iron ore concentrate more than 70%, and phosphorous below 0.08%, sulfur-bearing is below 0.30%, and is siliceous below 8%, and the high phosphorus-sulfur siderite resource is rationally utilized, thoroughly solved the problem of present iron ore deposit imbalance between supply and demand, the present invention does not outwards discharge any gurry, and the filtrate of flotation is all returned in this processing step and recycled, the sulfur-bearing that floatingly selects, reprocess after the phosphorous foam recovery, namely become valuables, therefore, simple process, production cost is low; sort the quality height, is a desirable high phosphorus-sulfur siderite integrated conduct method.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1
1, with iron content 30.82%, phosphorous 1.06%, the crushing raw ore ore grinding of sulfur-bearing 1.30% to the thin ore deposit of-320 purposes accounts for 90% above mass ratio;
2, adjust the ore grinding pH value to 5 of 1 step, 28 ℃ of temperature, the amount of pressing 350g/ ton ore deposit adds xanthate, and the amount in 45g/ ton ore deposit adds 2# oil, carries out reverse flotation desulfurizing one time, collects the sulfur-bearing foam;
3, in the underflow of above-mentioned 2 step remainders, the amount of pressing again 100g/ ton ore deposit adds xanthate, and the amount in 30g/ ton ore deposit adds 2# oil, carries out the secondary counter floatation desulphurization, collects the sulfur-bearing foam;
4, the underflow pH value with above-mentioned 3 steps transfers to 11,28 ℃ of temperature, and add aliphatic acid 800g/ ton ore deposit, and waterglass 1650g/ ton ore deposit, starch 280g/ ton ore deposit, the reverse flotation dephosphorization is carried out in alkali lignin 150g/ ton ore deposit one time, collects phosphorous foam;
5, in the underflow of above-mentioned 4 steps, add aliphatic acid 400g/ ton ore deposit, waterglass 500g/ ton ore deposit, starch 40g/ ton ore deposit, secondary counter flotation dephosphorization is carried out in alkali lignin 50g/ ton ore deposit, collects phosphorous foam;
6, the phosphorous foam with 4,5 collection step merges, and adds therein aliphatic acid 640g/ ton ore deposit, waterglass 440g/ ton ore deposit, and starch 70g/ ton ore deposit, scan in alkali lignin 30g/ ton ore deposit, collects phosphorous foam;
7, the underflow with 5 steps, 6 steps filters, and gets filter residue and filtrate, and filtrate is sent regulating reservoir to prepare against and recycled, and the adding mass ratio is 5% sodium carbonate in filter residue, and mass ratio is 7% coal dust, and under 980 ℃ of temperature, reduction roasting 2 hours gets the roasting reduction ore deposit;
8, levigate extremely-200 purposes in the roasting reduction ore deposit of above-mentioned 7 steps are accounted for 90% above mass ratio, through conventional low intensity magnetic separation, obtain final iron ore concentrate, gained concentrate index is: iron ore concentrate iron content 86.33%, and phosphorous 0.08%, sulfur-bearing 0.30%, siliceous 7.97%, iron recovery is 71.08%.
Embodiment 2
1, with iron content 31.53%, phosphorous 1.04%, the crushing raw ore ore grinding of sulfur-bearing 1.29% to the thin ore deposit of-320 purposes accounts for 90% above mass ratio;
2, adjust the ore grinding pH value to 4 of 1 step, 25 ℃ of temperature, the amount of pressing 300g/ ton ore deposit adds xanthate, and the amount in 40g/ ton ore deposit adds 2# oil, carries out reverse flotation desulfurizing one time, collects the sulfur-bearing foam;
3, in the underflow of above-mentioned 2 step remainders, the amount of pressing again 50g/ ton ore deposit adds xanthate, and the amount in 20g/ ton ore deposit adds 2# oil, carries out the secondary counter floatation desulphurization, collects the sulfur-bearing foam;
4, the underflow pH value with above-mentioned 3 steps transfers to 9,25 ℃ of temperature, and add aliphatic acid 600g/ ton ore deposit, and waterglass 1500g/ ton ore deposit, starch 200g/ ton ore deposit, the reverse flotation dephosphorization is carried out in alkali lignin 100g/ ton ore deposit one time, collects phosphorous foam;
5, in the underflow of above-mentioned 4 steps, add aliphatic acid 300g/ ton ore deposit, waterglass 400g/ ton ore deposit, starch 30g/ ton ore deposit, secondary counter flotation dephosphorization is carried out in alkali lignin 40g/ ton ore deposit, collects phosphorous foam;
6, the phosphorous foam with 4,5 collection step merges, and adds therein aliphatic acid 600g/ ton ore deposit, waterglass 400g/ ton ore deposit, and starch 50g/ ton ore deposit, scan in alkali lignin 20g/ ton ore deposit, collects phosphorous foam;
7, the underflow with 5 steps, 6 steps filters, and gets filter residue and filtrate, and filtrate is sent regulating reservoir to prepare against and recycled, and the adding mass ratio is 3% calcium carbonate in filter residue, and mass ratio is 5% coal dust, and under 950 ℃ of temperature, reduction roasting 2 hours gets the roasting reduction ore deposit;
8, levigate extremely-200 purposes in the roasting reduction ore deposit of above-mentioned 7 steps are accounted for 90% above mass ratio, through conventional low intensity magnetic separation, obtain final iron ore concentrate, gained concentrate index is: iron ore concentrate iron content 846.28%, and phosphorous 0.07%, sulfur-bearing 0.31%, siliceous 7.88%, iron recovery is 70.88%.
Implement 3
1, with iron content 32.23%, phosphorous 1.09%, the crushing raw ore ore grinding of sulfur-bearing 1.32% to the thin ore deposit of-320 purposes accounts for 90% above mass ratio;
2, adjust the ore grinding pH value to 6 of 1 step, 35 ℃ of temperature, the amount of pressing 400g/ ton ore deposit adds xanthate, and the amount in 50g/ ton ore deposit adds 2# oil, carries out reverse flotation desulfurizing one time, collects the sulfur-bearing foam;
3, in the underflow of above-mentioned 2 step remainders, the amount of pressing again 150g/ ton ore deposit adds xanthate, and the amount in 50g/ ton ore deposit adds 2# oil, carries out the secondary counter floatation desulphurization, collects the sulfur-bearing foam;
4, the underflow pH value with above-mentioned 3 steps transfers to 12,35 ℃ of temperature, and add aliphatic acid 1000g/ ton ore deposit, and waterglass 1750g/ ton ore deposit, starch 350g/ ton ore deposit, the reverse flotation dephosphorization is carried out in alkali lignin 200g/ ton ore deposit one time, collects phosphorous foam;
5, in the underflow of above-mentioned 4 steps, add aliphatic acid 500g/ ton ore deposit, waterglass 600g/ ton ore deposit, starch 50g/ ton ore deposit, secondary counter flotation dephosphorization is carried out in alkali lignin 60g/ ton ore deposit, collects phosphorous foam;
6, the phosphorous foam with 4,5 collection step merges, and adds therein aliphatic acid 700g/ ton ore deposit, waterglass 500g/ ton ore deposit, and starch 100g/ ton ore deposit, scan in alkali lignin 40g/ ton ore deposit, collects phosphorous foam;
7, the underflow with 5 steps, 6 steps filters, and gets filter residue and filtrate, and filtrate is sent regulating reservoir to prepare against and recycled, and the adding mass ratio is 6% sodium carbonate in filter residue, and mass ratio is 9% coal dust, and under 1100 ℃ of temperature, reduction roasting 1 hour gets the roasting reduction ore deposit;
8, levigate extremely-200 purposes in the roasting reduction ore deposit of above-mentioned 7 steps are accounted for 90% above mass ratio, through conventional low intensity magnetic separation, obtain final iron ore concentrate, gained concentrate index is: iron ore concentrate iron content 87.06%, and phosphorous 0.07%, sulfur-bearing 0.32%, siliceous 7.75%, iron recovery is 72.99%.
Claims (5)
1. the integrated conduct method of a high phosphorus-sulfur siderite is characterized in that through following process steps:
A, raw ore is carried out ore grinding, make the thin ore deposit of-320 purposes account for 90% above mass ratio;
B, adjust the ore grinding pH value to 4 of A step～6, temperature to 25～35 ℃ add xanthate by the amount in 300～600g/ ton ore deposit, and the amount in 50～100g/ ton ore deposit adds 2# oil, carries out reverse flotation desulfurizing, collection sulfur-bearing foam;
C, adjustment B step underflow pH value to 9～12, temperature to 25～35 ℃, amount by 900～1500g/ ton ore deposit adds aliphatic acid, the amount in 1900～2300g/ ton ore deposit adds waterglass, and the amount in 230～400g/ ton ore deposit adds starch, and the amount in 140～260g/ ton ore deposit adds alkali lignin, carry out the reverse flotation dephosphorization, collect phosphorous foam, underflow filters to get filter residue and filtrate, and filtrate send the regulating reservoir retrieval system to recycle;
D, in the phosphorous foam of C step, amount by 600～700g/ ton ore deposit adds aliphatic acid, the amount in 400～500g/ ton ore deposit adds waterglass, the amount in 50～100g/ ton ore deposit adds starch, the amount in 20～40g/ ton ore deposit adds alkali lignin, scans, and collects phosphorous foam, underflow filters to get filter residue and filtrate, and filtrate send the regulating reservoir retrieval system to recycle;
E, in the filter residue of C step, D step, add sodium carbonate or calcium carbonate by 3～6% mass ratio, the mass ratio by 5～9% adds coal dust, under 950～1100 ℃ of temperature, reduction roasting 1～2 hour gets the roasting reduction ore deposit;
F, account for 90% above mass ratio to-200 purposes with the roasting reduction ore deposit of E step is levigate, through conventional low intensity magnetic separation, obtain iron ore concentrate.
2. the integrated conduct method of high phosphorus-sulfur siderite as claimed in claim 1 is characterized in that the reverse flotation desulfurizing of described B step carries out once at least.
3. the integrated conduct method of high phosphorus-sulfur siderite as claimed in claim 1, the reverse flotation desulfurizing that it is characterized in that described B step carries out secondary, and the flotation agent consumption successively decreases successively, and namely the flotation dosage used of reverse flotation desulfurizing is: xanthate 300～400g/ ton ore deposit, 2# oil 40～50g/ ton ore deposit; The flotation dosage that the secondary counter floatation desulphurization is used is: xanthate 50～150g/ ton ore deposit, 2# oil 20～40g/ ton ore deposit.
4. the integrated conduct method of high phosphorus-sulfur siderite as claimed in claim 1 is characterized in that the reverse flotation dephosphorization of described C step carries out once at least.
5. the integrated conduct method of high phosphorus-sulfur siderite as claimed in claim 1, the reverse flotation dephosphorization that it is characterized in that described C step carries out secondary, and the flotation agent consumption successively decreases successively, namely the flotation dosage used of reverse flotation dephosphorization is: aliphatic acid 600～1000g/ ton ore deposit, waterglass 1500～1750g/ ton ore deposit, starch 220～350g/ ton ore deposit, alkali lignin 100～200g/ ton ore deposit; The flotation dosage that secondary counter flotation dephosphorization is used is: aliphatic acid 300～500g/ ton ore deposit, waterglass 400～600g/ ton ore deposit, starch 30～50g/ ton ore deposit, alkali lignin 40～60g/ ton ore deposit.
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| CN102836776B (en) * | 2011-06-21 | 2015-04-29 | 邵金堤 | Mineral separation production process technology |
| JP6009999B2 (en) * | 2013-06-27 | 2016-10-19 | 株式会社神戸製鋼所 | Method for producing low sulfur-containing iron ore |
| 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 |
| CN104141018B (en) * | 2014-07-23 | 2016-08-10 | 重庆大学 | A kind of slag recoverying and utilizing method |
| CN109127147A (en) * | 2018-07-19 | 2019-01-04 | 昆明理工大学 | A kind of beneficiation method of high phosphorus iron ore concentrate dephosphorus iron extraction |
| CN108970799A (en) * | 2018-08-06 | 2018-12-11 | 中国恩菲工程技术有限公司 | The system for handling Ultra-low-grade magnetite |
| CN108950186A (en) * | 2018-08-21 | 2018-12-07 | 成渝钒钛科技有限公司 | A kind of processing method for the manufacturing process and iron ore concentrate improving iron ore pellets yield |
| CN108754135A (en) * | 2018-08-21 | 2018-11-06 | 成渝钒钛科技有限公司 | The processing method for improving the manufacturing process and iron ore concentrate of the production efficiency of vanadium-titanium pellet |
| CN110038713B (en) * | 2019-03-29 | 2021-04-27 | 中冶北方（大连）工程技术有限公司 | Mineral separation process for apatite magnetite |
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| GB1356915A (en) * | 1972-01-29 | 1974-06-19 | Soquem | Froth flotation |
| US6170669B1 (en) * | 1998-06-30 | 2001-01-09 | The Commonwealth Of Australia Commonwealth Scientific And Industrial Research Organization | Separation of minerals |
| CN1857783A (en) * | 2006-05-30 | 2006-11-08 | 长沙矿冶研究院 | Beneficiation method for weak magnetic iron ores such as siderite, limonite and siderite paragenetic ore |
| CN101234367A (en) * | 2008-03-04 | 2008-08-06 | 昆明晶石矿冶有限公司 | Siderite floatation collector and preparation thereof |
| CN101264466A (en) * | 2008-05-12 | 2008-09-17 | 昆明理工大学 | High phosphorus and sulphur siderite full flotation mineral separation method |
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2010
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1356915A (en) * | 1972-01-29 | 1974-06-19 | Soquem | Froth flotation |
| US6170669B1 (en) * | 1998-06-30 | 2001-01-09 | The Commonwealth Of Australia Commonwealth Scientific And Industrial Research Organization | Separation of minerals |
| CN1857783A (en) * | 2006-05-30 | 2006-11-08 | 长沙矿冶研究院 | Beneficiation method for weak magnetic iron ores such as siderite, limonite and siderite paragenetic ore |
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| CN101264466A (en) * | 2008-05-12 | 2008-09-17 | 昆明理工大学 | High phosphorus and sulphur siderite full flotation mineral separation method |
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