CN111468303A - Method for preparing flotation collector from ether mixture - Google Patents
Method for preparing flotation collector from ether mixture Download PDFInfo
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- CN111468303A CN111468303A CN202010315603.6A CN202010315603A CN111468303A CN 111468303 A CN111468303 A CN 111468303A CN 202010315603 A CN202010315603 A CN 202010315603A CN 111468303 A CN111468303 A CN 111468303A
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- flotation
- ether
- coal
- preparing
- stirring
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000005188 flotation Methods 0.000 title claims abstract description 59
- 239000000203 mixture Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 29
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 29
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims abstract description 12
- LCGLNKUTAGEVQW-UHFFFAOYSA-N methyl monoether Natural products COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 36
- -1 dimethoxy dimethyl ether Chemical compound 0.000 claims description 12
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 10
- 239000002283 diesel fuel Substances 0.000 claims description 9
- 239000003350 kerosene Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 18
- 239000003814 drug Substances 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 abstract description 3
- 239000003245 coal Substances 0.000 description 71
- 239000000126 substance Substances 0.000 description 12
- 238000011084 recovery Methods 0.000 description 11
- 239000000047 product Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical group CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 125000000524 functional group Chemical group 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
- B03D2203/08—Coal ores, fly ash or soot
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention relates to a method for preparing a flotation collector by an ether mixture, which comprises the following steps of (1) selecting 45-50% of hydrocarbon oil, 45-50% of mixed ether and 5-10% of accelerator; (2) respectively adding the components in the step (1) into a mixing tank, and stirring by using a stirring shaft for uniformly mixing for 10-15 minutes; (3) and after stirring is finished, the product is obtained. Experiments prove that the flotation efficiency can be obviously improved, the medicament consumption is reduced, and the cost is further reduced by using the collecting agent.
Description
Technical Field
The invention relates to the technical field of flotation agents, in particular to a method for preparing a flotation collector from an ether mixture.
Background
The flotation is the most extensive method for separating fine-grained minerals, so that the ash reduction and quality improvement of fine-grained coal slime can be effectively realized, and the utilization value of the fine-grained coal slime is improved. However, the conventional collecting agents (such as diesel oil, kerosene and the like) are used for flotation of low-rank coal slime, so that the problems of high medicine consumption, high flotation cost and the like exist, and the low-rank coal slime is difficult to realize economic and efficient separation. Therefore, a large amount of low-rank coal slime which is not subjected to sorting and upgrading is selectively mixed with the fine clean coal for sorting, so that the quality of the power coal product is reduced, and the combustion pollution is serious. And for part of medium-high-ash low-order coal slime, the coal slime is discarded to gangue due to extremely low utilization value, and spontaneous combustion and dust emission harm exist.
Because the surface of the low-rank coal slime contains a plurality of oxygen functional groups, a hydration film formed on the surface of the low-rank coal slime is relatively thick, the conventional collecting agent is difficult to spread on the surface to obviously improve the surface hydrophobicity of the low-rank coal slime, and the recovery rate of the low-rank coal slime is often improved by increasing the using amount of the collecting agent. In the flotation separation, when diesel oil is used as a collecting agent, the consumption of coal slime per ton is over 8kg/t, and even reaches 50kg/t, and the expensive medicament cost makes the low-rank coal flotation uneconomical.
Therefore, aiming at the current situations that the conventional reagent for flotation of the low-rank coal slime has high medicine consumption and high cost and the unconventional flotation method has poor operability, the special high-efficiency reagent suitable for conventional flotation of the low-rank coal slime is developed, so that the flotation upgrading of the power coal slime in China and the high-efficiency clean utilization of coal resources are facilitated, and the special high-efficiency reagent has great significance for reducing coal pollution and improving the economic efficiency of coal enterprises.
Disclosure of Invention
The invention aims to provide a method for preparing a flotation collector from an ether mixture, and aims to provide a novel flotation collector and improve the flotation effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing flotation collector from ether mixture comprises (1) selecting hydrocarbon oil 45-50%, mixed ether 45-50%, and promoter 5-10%;
(2) respectively adding the components in the step (1) into a mixing tank, and stirring by using a stirring shaft for uniformly mixing for 10-15 minutes;
(3) and after stirring is finished, the product is obtained.
Further, the hydrocarbon oil is selected from C10-C16 hydrocarbon oil.
Further, the mixed ether is a mixture of dimethoxy dimethyl ether and trimethoxy dimethyl ether, and the mass ratio of the dimethoxy dimethyl ether to the trimethoxy dimethyl ether is 20:3-20: 5.
Further, the accelerator is ethylene oxide.
Further, the hydrocarbon oil is selected from at least one of diesel oil or kerosene.
Further, the hydrocarbon oil accounts for 46% by mass, the mixed ether accounts for 48% by mass, and the accelerator accounts for 6% by mass.
The invention has the beneficial effects that:
the C10-C16 hydrocarbon oil adopted in the flotation collector is a common coal chemical byproduct, the price is low, the source is wide, and the added accelerant is a common chemical product and is easy to obtain.
The mixed ether in the collecting agent has stronger polarity than hydrocarbons in kerosene, gasoline and the like, and can form hydrogen bonds with various oxygen-containing functional groups in coal, such as hydroxyl, carboxyl, phenolic hydroxyl and the like, namely, the mixed ether is subjected to chemical adsorption. The chemical adsorption can improve the hydrophobicity of the coal, reduce the tension of an oil-water interface, promote the dispersion of the mixed ether in a water phase, and enable the mixed ether to be in contact with the coal particles, thereby improving the selectivity of flotation.
Furthermore, the flotation collector disclosed by the invention adopts ethylene oxide as an accelerant, and the strong polar oxygen atoms of the ethylene oxide act with main oxygen-containing functional groups (C-O, C ═ O, COO-and the like) on the surface of the coal slime, so that the hydrophobicity of coal particles is greatly improved. Under the synergistic effect of the accelerant, the hydrocarbon oil can be efficiently spread on the surface of the coal particles, so that the flotation efficiency is obviously improved, and the consumption of the chemical agent is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the tables in the embodiments of the present invention.
Example 1:
a method of preparing a flotation collector from an ether mixture, comprising the steps of:
(1) selecting hydrocarbon oil with the mass ratio of 46%, mixed ether with the mass ratio of 48% and an accelerant with the mass ratio of 6%.
The hydrocarbon oil is selected from C10-C16 hydrocarbon oil, and in the embodiment, diesel oil.
The mixed ether is a mixture of dimethoxy dimethyl ether and trimethoxy dimethyl ether, and the mass ratio of the dimethoxy dimethyl ether to the trimethoxy dimethyl ether is 20: 3.
The accelerator is ethylene oxide.
(2) Respectively adding the components in the step (1) into a mixing tank, and stirring by using a stirring shaft to uniformly mix the components for 10 minutes;
(3) and after stirring is finished, obtaining the collecting agent.
Example 2:
a method of preparing a flotation collector from an ether mixture, comprising the steps of:
(1) selecting 50% of hydrocarbon oil, 45% of mixed ether and 5% of accelerator by mass ratio.
The hydrocarbon oil is selected from C10-C16 hydrocarbon oil, and in the embodiment, diesel oil.
The mixed ether is a mixture of dimethoxy dimethyl ether and trimethoxy dimethyl ether, and the mass ratio of the dimethoxy dimethyl ether to the trimethoxy dimethyl ether is 20: 4.
The accelerator is ethylene oxide.
(2) Respectively adding the components in the step (1) into a mixing tank, and stirring by using a stirring shaft for uniformly mixing for 13 minutes;
(3) and after stirring is finished, obtaining the collecting agent.
Example 3:
a method of preparing a flotation collector from an ether mixture, comprising the steps of:
(1) selecting hydrocarbon oil with the mass ratio of 45%, mixed ether with the mass ratio of 50% and an accelerant with the mass ratio of 5%.
The hydrocarbon oil is selected from C10-C16 hydrocarbon oil, and in the embodiment, diesel oil.
The mixed ether is a mixture of dimethoxy dimethyl ether and trimethoxy dimethyl ether, and the mass ratio of the dimethoxy dimethyl ether to the trimethoxy dimethyl ether is 20: 3.
The accelerator is ethylene oxide.
(2) Respectively adding the components in the step (1) into a mixing tank, and stirring by using a stirring shaft to uniformly mix the components for 12 minutes;
(3) and after stirring is finished, obtaining the collecting agent.
Example 4:
a method of preparing a flotation collector from an ether mixture, comprising the steps of:
(1) selecting hydrocarbon oil 45 wt%, mixed ether 45 wt% and promoter 10 wt%.
The hydrocarbon oil is selected from C10-C16 hydrocarbon oil, and kerosene in the embodiment.
The mixed ether is a mixture of dimethoxy dimethyl ether and trimethoxy dimethyl ether, and the mass ratio of the dimethoxy dimethyl ether to the trimethoxy dimethyl ether is 20: 5.
The accelerator is ethylene oxide.
(2) Respectively adding the components in the step (1) into a mixing tank, and stirring by using a stirring shaft for uniformly mixing for 15 minutes;
(3) and after stirring is finished, obtaining the collecting agent.
Experimental example 1:
coal slime property: the coal sample comes from an open-air coal storage yard in a certain mining area of inner Mongolia, and the coal slime is fed with 32% of ash. The granularity of the coal sample is fine, and the coal slime with the granularity of-0.074 mm accounts for 60 percent of the coal sample.
And (2) a flotation step, namely weighing 120g of dry coal slime at the stirring speed of a stirring shaft of a flotation machine of 1500rpm, pouring the dry coal slime into a flotation tank filled with tap water to prepare flotation ore pulp (the concentration of the ore pulp is 80 g/L), adding a collecting agent, stirring for 3min, respectively carrying out experiments on the collecting agent prepared according to the above embodiments, adding a foaming agent, namely secondary octanol, stirring for 30s, introducing gas (the aeration quantity J g0.8cm/s of the flotation machine), carrying out foam scraping for 3min, respectively filtering, drying and weighing the scraped foam and residues at the tank bottom, namely flotation clean coal and flotation tail coal, and calculating the recovery rate of combustible products, wherein the results are shown in Table 1.
The combustible recovery rate of clean coal is specified by a coal flotation evaluation method (MT259-91), and the calculation formula is as follows:
in the formula: ecThe recovery rate of combustible bodies of the flotation clean coal is percent; r iscYield of flotation clean coal,%; a. thed，cIs a flotation clean coal dry baseAsh,%; a. thed，fIs the flotation feed dry basis ash content percent.
Table 1:
as can be seen from Table 1, when the consumption of the collector in the embodiment 1 is 2.0kg/t, the recovery rate of the clean coal combustible substance reaches 25.32%, the ash content of the clean coal is 15.28%, the flotation index is obviously better than the index when the consumption of the diesel oil is 10kg/t, the recovery rate of the combustible substance is only 6.12%, and the ash content of the clean coal is 20.12%. In the embodiment 2, when the consumption of the collecting agent is 2.8kg/t, the recovery rate of the combustible body of the clean coal reaches 32.14%, the ash content of the clean coal is 15.68%, and the flotation effect is further improved.
Experimental example 2:
coal slime property: the coal sample is from an open-air coal storage yard in a certain mining area in Shanxi, and the coal slime is fed with 22% of ash.
Coal slime with the size fraction of-0.074 mm accounts for 55% of the coal sample.
And (2) a flotation step, namely weighing 120g of dry coal slime at the stirring speed of a stirring shaft of a flotation machine of 1500rpm, pouring the dry coal slime into a flotation tank filled with tap water to prepare flotation ore pulp (the concentration of the ore pulp is 80 g/L), adding a collecting agent, stirring for 3min, respectively carrying out experiments on the collecting agent prepared according to the above embodiments, adding a foaming agent, namely secondary octanol, stirring for 30s, introducing gas (the aeration quantity J g0.8cm/s of the flotation machine), carrying out foam scraping for 3min, respectively filtering, drying and weighing the scraped foam and residues at the tank bottom, namely flotation clean coal and flotation tail coal, and calculating the recovery rate of combustible products, wherein the results are shown in Table 2.
Table 2:
as can be seen from Table 2, in the embodiment 1, when the consumption of the collecting agent is 2.0kg/t, the recovery rate of the clean coal combustible substance is 24.31%, the ash content of the clean coal is 15.32%, the flotation index is obviously better than the index when the consumption of the diesel oil is 10kg/t, the recovery rate of the combustible substance is only 6.12%, and the ash content of the clean coal is 20.12%. In the embodiment 2, when the consumption of the collecting agent is 2.8kg/t, the recovery rate of the combustible body of the clean coal reaches 32.84%, the ash content of the clean coal is 14.97%, and the flotation effect is further improved.
Compared with the prior art, the invention has the following beneficial effects:
(1) the flotation collector provided by the invention adopts ethylene oxide as an accelerant and mixed ether as a main component. The ether mixture and the strong polar oxygen atom of the ethylene oxide act with the main oxygen-containing functional groups (C-O, C ═ O, COO-and the like) on the surface of the coal slime, so that the hydrophobicity of the coal particles is greatly improved. Under the synergistic effect of the accelerant, the hydrocarbon oil can be efficiently spread on the surface of the coal particles, so that the flotation efficiency is obviously improved, and the consumption of the chemical agent is reduced.
(2) The C10-C16 hydrocarbon oil adopted in the flotation collector provided by the invention is a common coal chemical industry byproduct, is low in price and wide in source, and the added accelerant is a common chemical industry product and is easy to obtain.
(3) The mixed ether in the collecting agent has stronger polarity than hydrocarbons in kerosene, gasoline and the like, and can form hydrogen bonds with various oxygen-containing functional groups in coal, such as hydroxyl, carboxyl, phenolic hydroxyl and the like, namely, the mixed ether is subjected to chemical adsorption. The chemical adsorption can improve the hydrophobicity of the coal, reduce the tension of an oil-water interface, promote the dispersion of the mixed ether in a water phase, and enable the mixed ether to be in contact with the coal particles, thereby improving the selectivity of flotation.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.
Claims (6)
1. A method for preparing a flotation collector from an ether mixture is characterized by comprising the following steps: comprises the following steps of (1) selecting 45-50% of hydrocarbon oil, 45-50% of mixed ether and 5-10% of accelerator;
(2) respectively adding the components in the step (1) into a mixing tank, and stirring by using a stirring shaft for uniformly mixing for 10-15 minutes;
(3) and after stirring is finished, the product is obtained.
2. A method of preparing a flotation collector according to the ether mixture of claim 1, wherein: the hydrocarbon oil is C10-C16 hydrocarbon oil.
3. A method of preparing a flotation collector according to the ether mixture of claim 1, wherein: the mixed ether is a mixture of dimethoxy dimethyl ether and trimethoxy dimethyl ether, and the mass ratio of the dimethoxy dimethyl ether to the trimethoxy dimethyl ether is 20:3-20: 5.
4. A method of preparing a flotation collector according to the ether mixture of claim 1, wherein: the accelerator is ethylene oxide.
5. A method of preparing a flotation collector according to the ether mixture of claim 2, wherein: the hydrocarbon oil is at least one of diesel oil or kerosene.
6. A method of preparing a flotation collector according to any one of claims 1 to 5, characterised in that: 46% of the hydrocarbon oil, 48% of the mixed ether and 6% of the accelerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010315603.6A CN111468303A (en) | 2020-04-21 | 2020-04-21 | Method for preparing flotation collector from ether mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010315603.6A CN111468303A (en) | 2020-04-21 | 2020-04-21 | Method for preparing flotation collector from ether mixture |
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| Publication Number | Publication Date |
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| CN111468303A true CN111468303A (en) | 2020-07-31 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108940602A (en) * | 2018-08-21 | 2018-12-07 | 中国矿业大学 | Collecting agent and method for floating for weakly caking coal coal slime flotation |
| CN109174463A (en) * | 2018-08-21 | 2019-01-11 | 中国矿业大学 | Collecting agent and preparation method, method for floating for oxidized coal coal slime flotation |
| CN109569890A (en) * | 2018-11-26 | 2019-04-05 | 河南安立信环保科技有限公司 | Mix ether flotation agent and preparation method thereof |
| WO2019075169A2 (en) * | 2017-10-12 | 2019-04-18 | Cytec Industries Inc. | Methods for flotation recovery of value material from coarse-sized particles |
-
2020
- 2020-04-21 CN CN202010315603.6A patent/CN111468303A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019075169A2 (en) * | 2017-10-12 | 2019-04-18 | Cytec Industries Inc. | Methods for flotation recovery of value material from coarse-sized particles |
| CN108940602A (en) * | 2018-08-21 | 2018-12-07 | 中国矿业大学 | Collecting agent and method for floating for weakly caking coal coal slime flotation |
| CN109174463A (en) * | 2018-08-21 | 2019-01-11 | 中国矿业大学 | Collecting agent and preparation method, method for floating for oxidized coal coal slime flotation |
| CN109569890A (en) * | 2018-11-26 | 2019-04-05 | 河南安立信环保科技有限公司 | Mix ether flotation agent and preparation method thereof |
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