CN103212486B - Method for low-grade magnesite flotation - Google Patents
Method for low-grade magnesite flotation Download PDFInfo
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- CN103212486B CN103212486B CN201310162307.7A CN201310162307A CN103212486B CN 103212486 B CN103212486 B CN 103212486B CN 201310162307 A CN201310162307 A CN 201310162307A CN 103212486 B CN103212486 B CN 103212486B
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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 method for floating field, relate to particularly a kind of method for floating that magnesite lean ore is processed as to high-quality magnesite.
Background technology
Magnesite is due to higher fire resistance, caking property and other good physicochemical characteristic, and is widely used in the fields such as metallurgy, building materials, chemical industry, light industry, agriculture and animal husbandry and magnesium metal refinement.Magnesite is one of Dominant Mineral Resources of China, and type is mainly sparry magnesite type, and its reserves, output, export volume all occupy first place in the world.Approximately 3,000,000,000 tons of China's magnesite gross reserves, wherein, account for 53% of gross reserves containing I and II product more than MgO43%, and wherein primes above (containing select quality) magnesite reserves 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 that the MgO content needing most in the world is at present greater than 47% superfine magnesite reserves is considerably less.
Although China's magnesite reserves account for the more than 1/4th of world's gross reserves, in the exploitation of magnesite with in utilizing, exist the waste that an outstanding problem is resource serious.Due to 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 by exhaustion.
In fact in so-called lean ore, the grade of MgO is also in 40% left and right, and the recovery ratio less than 50% in some mine of China is even lower, causes the significant wastage of resource, and a large amount of ore storages are abandoned, and also cause environmental pollution.According to on-the-spot investigation, understand, containing 160 yuan per ton of the price of superfine giobertite more than MgO47%, and containing only 20～30 yuan/ton of the I and II giobertites of MgO44%～46%, and this part ore accounts for the more than 70% of gross reserves.Therefore how improving the content of MgO in 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 a kind of method of flotation low-grade magnesite, adopt method of the present invention; can effectively improve the content of MgO in low-grade magnesite, reduce impurity content, can make full use of existing magnesite resource; not only save the energy, and protection of the environment.
The technical solution used in the present invention is: a kind of method of flotation low-grade magnesite, and step is as follows:
1) ore grinding: ore grinding after magnesite lean ore is pulverized, get 200 order screenings, obtain 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, stir 3-5 minute, fills air, discards the foam on upper strata, leaves and takes bottom material;
3) the bottom material twice direct flotation: direct flotation for the first time, by liquid-solid ratio 2-4:1, get direct flotation medicament and the 2nd) obtaining in step, under environment temperature, stirs after 3-5 minute, fills air flotation, accesses upper foam material; Upper foam material is repeated once, carry out direct flotation for the second time, by the upper foam material finally accessing, dry.
The method of above-mentioned a kind of flotation low-grade magnesite, the consisting of of described reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1-2.
The method of above-mentioned a kind of flotation low-grade magnesite, 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 different magnesites mine, Liaoning Area, differently containing high silicon magnesite mineral type characteristic, carry out lean ore purification Technology's Study, establish corase grind-reverse flotation silica removal-twice direct flotation selected open circuit flow process and realized the separated of valuable mineral and gangue mineral, and obtained comparatively ideal technical indicator.Magnesite lean ore can be purified to the more than 47% superfine magnesite of MgO content.Method of the present invention can operate under the low temperature environment of 0 ℃.The present invention has realized industrial scale, has broken through magnesite silicone content in the past and has been greater than 1% unrenewable boundary, and for our province, for low-grade magnesite, comprehensive utilization has launched new page.Discarded magnesite is utilized, and has expanded in a sense domestic magnesite resource reserves.By ore dressing, solve mining area discarded object problem of environmental pollution simultaneously.
The specific embodiment
the method of 1 one kinds of flotation low-grade magnesites of embodiment
(1) step is as follows
1) ore grinding: (Haicheng decorated archway area low-grade magnesite, siliceous 2.30%, MgO 43%, Fe by magnesite lean ore
2o
32.6%) pulverize rear ore grinding, get 200 order screenings, obtain magnesite lean ore powder;
2) reverse flotation first: by liquid-solid ratio 1:1(, 1kg magnesite lean ore powder needs the reverse floatation agent of 1 liter), negate floating agent and magnesite lean ore powder, under environment temperature, stir 3 minutes, fills air, discards the foam on upper strata, leaves and takes bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1;
3) the bottom material twice direct flotation: direct flotation for the first time: by liquid-solid ratio 3:1, get direct flotation medicament and the 2nd) obtaining in step, under environment temperature, stirs and fills air flotation after 3 minutes, accesses upper foam material; Direct flotation for the second time: again by liquid-solid ratio 3:1, by direct flotation medicament and the upper foam mixing of materials accessing, under environment temperature, stirs and fill air flotation after 3 minutes, access upper foam material, oven dry, obtains 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-grade magnesites of embodiment
(1) step is as follows
1) ore grinding: (In Dashiqiao Area, Liaoning low-grade magnesite, siliceous 2.50%, MgO 42%, Fe by magnesite lean ore
2o
32.2%) pulverize rear ore grinding, get 200 order screenings, obtain magnesite lean ore powder;
2) reverse flotation first: by liquid-solid ratio 1:1, negate floating agent and magnesite lean ore powder, under environment temperature, stir 3 minutes, fills air, discards the foam on upper strata, leaves and takes bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1.5;
3) the bottom material twice direct flotation: direct flotation for the first time, by liquid-solid ratio 2:1, get direct flotation medicament and the 2nd) obtaining in step, under environment temperature, stirs air flotation after 3 minutes, accesses upper materials; The upper materials accessing is repeated once, carry out direct flotation for the second time, by the upper materials finally accessing, dry, obtain 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, in target product, contain: 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-grade magnesites of embodiment
(1) step is as follows
1) ore grinding: ore grinding after magnesite lean ore (Liaoyang Region low-grade magnesite, siliceous 3.50%, MgO 41%, CaO 2.2%) is pulverized, get 200 order screenings, obtain magnesite lean ore powder;
2) reverse flotation first: by liquid-solid ratio 2:1, negate floating agent and magnesite lean ore powder, under environment temperature, stir 3 minutes, fills air, discards the foam on upper strata, leaves and takes bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1;
3) the bottom material twice direct flotation: direct flotation for the first time, by liquid-solid ratio 4:1, get direct flotation medicament and the 2nd) obtaining in step, under environment temperature, stirs air flotation after 3 minutes, accesses the material on upper strata; The upper materials accessing is repeated once, carry out direct flotation for the second time, by the upper materials finally accessing, dry, obtain 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, in target product, contain: 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-grade magnesites of embodiment
(1) step is as follows
1) ore grinding: ore grinding after magnesite lean ore (siliceous 2.0%, MgO 42.4%) is pulverized, get 200 order screenings, obtain magnesite lean ore powder;
2) reverse flotation first: by liquid-solid ratio 1:1, negate floating agent and magnesite lean ore powder, under environment temperature, stir 3 minutes, fills air, discards the foam on upper strata, leaves and takes bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:2;
3) the bottom material twice direct flotation: direct flotation for the first time, by liquid-solid ratio 2:1, get direct flotation medicament and the 2nd) obtaining in step, under environment temperature, stirs air flotation after 3 minutes, accesses the material on upper strata; The upper materials accessing is repeated once, carry out direct flotation for the second time, by the upper materials finally accessing, dry, be 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, in target product, contain: silicon 0.12%, MgO 48.87%.The MgO rate of recovery is 75.34%.
the method of 5 one kinds of flotation low-grade magnesites of embodiment
(1) step is as follows
1) ore grinding: ore grinding after magnesite lean ore (siliceous 3.5%, MgO 43.8%) is pulverized, get 200 order screenings, obtain magnesite lean ore powder;
2) reverse flotation first: by liquid-solid ratio 1:1, negate floating agent and magnesite lean ore powder, under environment temperature, stir 3 minutes, fills air, discards the foam on upper strata, leaves and takes bottom material;
Consisting of of reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1.5;
3) the bottom material twice direct flotation: direct flotation for the first time, by liquid-solid ratio 3:1, get direct flotation medicament and the 2nd) obtaining in step, under environment temperature, stirs air flotation after 3 minutes, accesses the material on upper strata; The upper materials accessing is repeated once, carry out direct flotation for the second time, by the upper materials finally accessing, dry, obtain 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, in target product, contain: silicon 0.14%, MgO 48.57%.The MgO rate of recovery is 75%.
Claims (1)
1. a method for flotation low-grade magnesite, is characterized in that step is as follows:
1) ore grinding: ore grinding after magnesite lean ore is pulverized, get 200 order screenings, obtain 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, stir 3-5 minute, fills air, discards the foam on upper strata, leaves and takes bottom material;
3) the bottom material twice direct flotation: direct flotation for the first time, by liquid-solid ratio 2-4:1, get direct flotation medicament and the 2nd) obtaining in step, under environment temperature, stirs after 3-5 minute, fills air flotation, accesses upper foam material; Upper foam material is repeated once, carry out direct flotation for the second time, by the upper foam material finally accessing, dry;
Consisting of of described reverse floatation agent: by weight, ten di-primary amines: hydrochloric acid is 1:1-2;
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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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| CN112551921B (en) * | 2020-11-25 | 2022-06-07 | 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 |
| WO2024098089A1 (en) * | 2022-11-11 | 2024-05-16 | Ardea Resources Limited | Acid neutraliser composition |
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