CN103212486A - Method for low-grade magnesite flotation - Google Patents
Method for low-grade magnesite flotation Download PDFInfo
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- CN103212486A CN103212486A CN2013101623077A CN201310162307A CN103212486A CN 103212486 A CN103212486 A CN 103212486A CN 2013101623077 A CN2013101623077 A CN 2013101623077A CN 201310162307 A CN201310162307 A CN 201310162307A CN 103212486 A CN103212486 A CN 103212486A
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- magnesite
- flotation
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- lean ore
- direct flotation
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Abstract
The invention relates to a method for low-grade magnesite flotation. The method includes the following steps: carrying out ore grinding on magnesite lean ore after the magnesite lean ore is smashed, and selecting 200-mesh screen underflow to obtain magnesite lean ore powder; taking reverse flotation reagents and the magnesite lean ore powder according to the liquid-solid ratio of 1-2:1, stirring the reverse flotation reagents and the magnesite lean ore powder for 3-5 minutes at an environment temperature, filling air into the reverse flotation reagents and the magnesite lean ore powder, removing foam on the upper layer, and keeping material on the bottom layer; taking direct flotation reagents and the material on the bottom layer in the step 2) according to the liquid-solid ratio of 2-4:1, stirring the direct flotation reagents and the material on the bottom layer for 3-5 minutes at the environment temperature, carrying out air filling and the flotation, and taking the foam material on the upper layer; and carrying out the process on the material on the upper layer again, taking the material on the upper layer again, and drying the material on the upper layer. According to the method for the low-grade magnesite flotation, the MgO content in low-grade magnesite can be effectively improved, the impurity content can be reduced, existing magnesite resources can be fully used, and both energy saving and environment protection are achieved.
Description
Technical field
The invention belongs to the method for floating field, relate to a kind of method for floating that the magnesite lean ore is processed as high-quality magnesite particularly.
Background technology
Magnesite is because higher fire resistance, caking property and other good physicochemical characteristic, and is widely used in fields such as metallurgy, building materials, chemical industry, light industry, agriculture and animal husbandry and magnesium metal refinement.Magnesite is one of advantage mineral resources of China, and type is mainly the sparry magnesite type, and its reserves, output, export volume all occupy first place in the world.About 3,000,000,000 tons of China's magnesite gross reserves wherein, contains the above I and II product of MgO43% and accounts for 53% of gross reserves, and wherein above (containing select quality) the magnesite reserves of primes are 11.7 hundred million tons, account for 37.6% of gross reserves; 4.8 hundred million tons of seconds reserves account for 15.4% of gross reserves, and the MgO content that needs most in the world at present is considerably less greater than 47% superfine magnesite reserves.
Though China's magnesite reserves account for more than 1/4th of world's gross reserves, the waste that to have an outstanding problem in the exploitation of magnesite with in utilizing be resource is serious.Because economic cause and lack suitable ore dressing process technology, rich ore is only adopted in a lot of mines, and abandons so-called lean ore, and magnesite is non-renewable resources, abandons poorly to adopt excellent recovery method and make high-quality resource adopt fewer and fewer.Therefore the prospect of the magnesite resource of China allows of no optimist.According to estimates, by present mining type and exploitation rate, the high-quality ore resource in most of magnesite mining area in the whole nation is with exhaustion.
In fact the grade of MgO is also about 40% in the so-called lean ore, and the recovery ratio less than 50% in some mine of China, even lower causes the significant wastage of resource, and a large amount of ore storages are abandoned, and also cause environmental pollution.Investigate understanding factually, contain 160 yuan per ton of the price of the above superfine giobertite of MgO47%, and contain only 20～30 yuan/ton of the I and II giobertites of MgO44%～46%, and this part ore accounts for more than 70% of gross reserves.Therefore how improving the content of MgO in the low-grade magnesite, reduce impurity content, sufficiently and reasonably utilize existing magnesite resource, is problem demanding prompt solution.
Summary of the invention
In order to overcome the above problems, the invention provides the method for the low-grade magnesite of a kind of flotation, adopt method of the present invention; can improve the content of MgO in the low-grade magnesite effectively, reduce impurity content, can make full use of existing magnesite resource; not only energy savings, and protection environment.
The technical solution used in the present invention is: a kind of method of flotation low-level magnesite, and step is as follows:
1) ore grinding: the magnesite lean ore is pulverized the back ore grinding, get 200 order screenings, get magnesite lean ore powder;
2) reverse flotation: by liquid-solid ratio 1-2:1, negate floating agent and magnesite lean ore powder under environment temperature, stirred 3-5 minute, filled air, discarded the foam on upper strata, left and took the bottom material;
3) twice direct flotation: direct flotation for the first time, by liquid-solid ratio 2-4:1, get direct flotation medicament and the 2nd) the bottom material that obtains in the step under environment temperature, stirs after 3-5 minute, fills air flotation, accesses the upper foam material; With the repetitive operation of upper foam material once, carry out the direct flotation second time, with the upper foam material that accesses at last, oven dry.
The method of the above-mentioned low-grade magnesite of a kind of flotation, the consisting of of described reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1-2.
The method of the above-mentioned low-grade magnesite of a kind of flotation, the consisting of of described direct flotation medicament: by weight, linoleic acid: leukotrienes: lauryl sodium sulfate is 7-9:1-3: 1.
The invention has the beneficial effects as follows: the present invention is directed to the different magnesites of Liaoning Area mine, difference contains high silicon magnesite mineral type characteristic and carries out the lean ore purification Technology's Study, establish corase grind-reverse flotation silica removal-twice direct flotation selected open circuit flow process and realized separating of valuable mineral and gangue mineral, and obtained comparatively ideal technical indicator.The magnesite lean ore can be purified to the superfine magnesite of MgO content more than 47%.Method of the present invention can be operated under 0 ℃ low temperature environment.The present invention has realized industrial scale, and having broken through in the past, the magnesite silicone content has launched new page greater than 1% unrenewable boundary for our province fully utilizes for low-grade magnesite.Discarded magnesite obtains utilizing, and has enlarged domestic magnesite resource reserves in a sense.Solve mining area discarded object problem of environmental pollution simultaneously by ore dressing.
The specific embodiment
The method of 1 one kinds of low-grade magnesite of flotation of embodiment
(1) step is as follows
1) ore grinding: (the low-grade magnesite in Haicheng decorated archway area, siliceous 2.30%, MgO 43%, Fe with the magnesite lean ore
2O
32.6%) pulverizes the back ore grinding, get 200 order screenings, get magnesite lean ore powder;
2) reverse flotation at first: by liquid-solid ratio 1:1(promptly, 1kg magnesite lean ore powder needs 1 liter reverse floatation agent), negate floating agent and magnesite lean ore powder under environment temperature, stirred 3 minutes, filled air, discarded the foam on upper strata, left and took the bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1;
3) twice direct flotation: direct flotation for the first time: by liquid-solid ratio 3:1, get direct flotation medicament and the 2nd) the bottom material that obtains in the step under environment temperature, stirs and fills air flotation after 3 minutes, accesses the upper foam material; Direct flotation for the second time: again by liquid-solid ratio 3:1, with direct flotation medicament and the upper foam mixing of materials that accesses, under environment temperature, stirs and fill air flotation after 3 minutes, access the upper foam material, oven dry gets target product;
Consisting of of direct flotation medicament: by weight, linoleic acid: leukotrienes: lauryl sodium sulfate is 8:2:1.
(2) testing result
After testing, target product contains: silicon 0.2%, MgO 47.01%, Fe
2O
30.2%.The MgO rate of recovery is 81.50%.
The method of 2 one kinds of flotation low-level magnesites of embodiment
(1) step is as follows
1) ore grinding: (the low-grade magnesite in Dashiqiao, Liaoning area, siliceous 2.50%, MgO 42%, Fe with the magnesite lean ore
2O
32.2%) pulverizes the back ore grinding, get 200 order screenings, get magnesite lean ore powder;
2) reverse flotation at first: by liquid-solid ratio 1:1, negate floating agent and magnesite lean ore powder under environment temperature, stirred 3 minutes, filled air, discarded the foam on upper strata, left and took the bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1.5;
3) twice direct flotation: direct flotation for the first time, by liquid-solid ratio 2:1, get direct flotation medicament and the 2nd) the bottom material that obtains in the step under environment temperature, stirs air flotation after 3 minutes, accesses upper materials; With the upper materials repetitive operation that accesses once, carry out the direct flotation second time, with the upper materials that accesses at last, oven dry, target product;
Consisting of of direct flotation medicament: by weight, linoleic acid: leukotrienes: lauryl sodium sulfate is 7:2:1.
(2) testing result
After testing, contain in the target product: silicon 0.04%, MgO 48.01%, Fe
2O
30.01%.The MgO rate of recovery is 81.50%.
The method of 3 one kinds of flotation low-level magnesites of embodiment
(1) step is as follows
1) ore grinding: magnesite lean ore (the low-grade magnesite in Liaoyang area, siliceous 3.50%, MgO 41%, CaO 2.2%) is pulverized the back ore grinding, gets 200 order screenings, magnesite lean ore powder;
2) reverse flotation at first: by liquid-solid ratio 2:1, negate floating agent and magnesite lean ore powder under environment temperature, stirred 3 minutes, filled air, discarded the foam on upper strata, left and took the bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1;
3) twice direct flotation: direct flotation for the first time, by liquid-solid ratio 4:1, get direct flotation medicament and the 2nd) the bottom material that obtains in the step under environment temperature, stirs air flotation after 3 minutes, accesses the material on upper strata; With the upper materials repetitive operation that accesses once, carry out the direct flotation second time, with the upper materials that accesses at last, oven dry, target product;
Consisting of of direct flotation medicament: by weight, linoleic acid: leukotrienes: lauryl sodium sulfate is 9:3: 1.
(2) testing result
After testing, contain in the target product: silicon 0.14%, MgO 48.2%, and CaO 0.10%.The MgO rate of recovery is 81.50%.
The method of 4 one kinds of flotation low-level magnesites of embodiment
(1) step is as follows
1) ore grinding: magnesite lean ore (siliceous 2.0%, MgO 42.4%) is pulverized the back ore grinding, gets 200 order screenings, magnesite lean ore powder;
2) reverse flotation at first: by liquid-solid ratio 1:1, negate floating agent and magnesite lean ore powder under environment temperature, stirred 3 minutes, filled air, discarded the foam on upper strata, left and took the bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:2;
3) twice direct flotation: direct flotation for the first time, by liquid-solid ratio 2:1, get direct flotation medicament and the 2nd) the bottom material that obtains in the step under environment temperature, stirs air flotation after 3 minutes, accesses the material on upper strata; With the upper materials repetitive operation that accesses once, carry out the direct flotation second time, with the upper materials that accesses at last, oven dry is target product;
Consisting of of direct flotation medicament: by weight, linoleic acid: leukotrienes: lauryl sodium sulfate is 7:3:1.
(2) testing result
After testing, contain in the target product: silicon 0.12%, MgO 48.87%.The MgO rate of recovery is 75.34%.
The method of 5 one kinds of flotation low-level magnesites of embodiment
(1) step is as follows
1) ore grinding: magnesite lean ore (siliceous 3.5%, MgO 43.8%) is pulverized the back ore grinding, gets 200 order screenings, magnesite lean ore powder;
2) reverse flotation at first: by liquid-solid ratio 1:1, negate floating agent and magnesite lean ore powder under environment temperature, stirred 3 minutes, filled air, discarded the foam on upper strata, left and took the bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1.5;
3) twice direct flotation: direct flotation for the first time, by liquid-solid ratio 3:1, get direct flotation medicament and the 2nd) the bottom material that obtains in the step under environment temperature, stirs air flotation after 3 minutes, accesses the material on upper strata; With the upper materials repetitive operation that accesses once, carry out the direct flotation second time, with the upper materials that accesses at last, oven dry, target product;
Consisting of of direct flotation medicament: by weight, linoleic acid: leukotrienes: lauryl sodium sulfate is 8:3:1.
(2) testing result
After testing, contain in the target product: silicon 0.14%, MgO 48.57%.The MgO rate of recovery is 75%.
Claims (3)
1. the method for a flotation low-level magnesite is characterized in that step is as follows:
1) ore grinding: the magnesite lean ore is pulverized the back ore grinding, get 200 order screenings, get magnesite lean ore powder;
2) reverse flotation: by liquid-solid ratio 1-2:1, negate floating agent and magnesite lean ore powder under environment temperature, stirred 3-5 minute, filled air, discarded the foam on upper strata, left and took the bottom material;
3) twice direct flotation: direct flotation for the first time, by liquid-solid ratio 2-4:1, get direct flotation medicament and the 2nd) the bottom material that obtains in the step under environment temperature, stirs after 3-5 minute, fills air flotation, accesses the upper foam material; With the repetitive operation of upper foam material once, carry out the direct flotation second time, with the upper foam material that accesses at last, oven dry.
2. the method for the low-grade magnesite of a kind of flotation as claimed in claim 1 is characterized in that: the consisting of of described reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1-2.
3. the method for the low-grade magnesite of a kind of flotation as claimed in claim 1 is characterized in that: the consisting of of described direct flotation medicament: by weight, linoleic acid: leukotrienes: lauryl sodium sulfate is 7-9:1-3: 1.
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Cited By (10)
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|---|---|---|---|---|
| CN103537380A (en) * | 2013-10-28 | 2014-01-29 | 辽宁科技大学 | Reverse flotation, tailings cleaning and recleaning method of magnesite ore |
| CN104437883A (en) * | 2014-11-13 | 2015-03-25 | 中蓝连海设计研究院 | Digestion-desliming-reverse floatation method for treatment of low-grade magnesite high in silicon content and calcium content |
| CN104923407A (en) * | 2014-03-18 | 2015-09-23 | 沈阳铝镁设计研究院有限公司 | Technology for utilizing magnesite direct-reverse flotation return water |
| CN104923383A (en) * | 2014-03-18 | 2015-09-23 | 沈阳铝镁设计研究院有限公司 | Dressing and grinding technology for low-grade magnesite |
| CN104399593B (en) * | 2014-10-20 | 2017-02-15 | 辽宁科技大学 | Magnesite ore desilicication and decalcification method |
| CN108514952A (en) * | 2018-04-26 | 2018-09-11 | 丛茂生 | Giobertite method for floating |
| CN112007761A (en) * | 2019-10-09 | 2020-12-01 | 中蓝连海设计研究院有限公司 | Method for refining magnesite |
| CN112551921A (en) * | 2020-11-25 | 2021-03-26 | 海城远东矿业有限公司 | Carbonization activation beneficiation technology for high-silicon magnesite |
| CN112742607A (en) * | 2020-12-24 | 2021-05-04 | 辽宁省地质矿产研究院有限责任公司 | Method for flotation of cryptocrystalline magnesite |
| CN114985094A (en) * | 2021-03-02 | 2022-09-02 | 营口盛海化工有限公司 | New technological process for magnesite dressing |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537380A (en) * | 2013-10-28 | 2014-01-29 | 辽宁科技大学 | Reverse flotation, tailings cleaning and recleaning method of magnesite ore |
| CN103537380B (en) * | 2013-10-28 | 2015-10-21 | 辽宁科技大学 | A kind of reverse flotation |
| CN104923407A (en) * | 2014-03-18 | 2015-09-23 | 沈阳铝镁设计研究院有限公司 | Technology for utilizing magnesite direct-reverse flotation return water |
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| CN104399593B (en) * | 2014-10-20 | 2017-02-15 | 辽宁科技大学 | Magnesite ore desilicication and decalcification method |
| CN104437883A (en) * | 2014-11-13 | 2015-03-25 | 中蓝连海设计研究院 | Digestion-desliming-reverse floatation method for treatment of low-grade magnesite high in silicon content and calcium content |
| CN104437883B (en) * | 2014-11-13 | 2017-04-05 | 中蓝连海设计研究院 | Process the digestion desliming reverse flotation method of low grade high-silicon high calcium magnesite |
| CN108514952A (en) * | 2018-04-26 | 2018-09-11 | 丛茂生 | Giobertite method for floating |
| CN112007761A (en) * | 2019-10-09 | 2020-12-01 | 中蓝连海设计研究院有限公司 | Method for refining magnesite |
| CN112551921A (en) * | 2020-11-25 | 2021-03-26 | 海城远东矿业有限公司 | Carbonization activation beneficiation technology for high-silicon magnesite |
| CN112742607A (en) * | 2020-12-24 | 2021-05-04 | 辽宁省地质矿产研究院有限责任公司 | Method for flotation of cryptocrystalline magnesite |
| CN114985094A (en) * | 2021-03-02 | 2022-09-02 | 营口盛海化工有限公司 | New technological process for magnesite dressing |
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