CN113522529A - Anthracite ash reducing agent - Google Patents
Anthracite ash reducing agent Download PDFInfo
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- CN113522529A CN113522529A CN202110827440.4A CN202110827440A CN113522529A CN 113522529 A CN113522529 A CN 113522529A CN 202110827440 A CN202110827440 A CN 202110827440A CN 113522529 A CN113522529 A CN 113522529A
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- Prior art keywords
- agent
- inhibitor
- stirring
- flotation
- shearing
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- 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
- B03D1/002—Inorganic compounds
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- 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
- B03D2201/06—Depressants
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- 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
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention discloses an anthracite ash reduction medicament, which is characterized in that medicaments are respectively added in the processes of shearing flocculation and flotation, and comprise an inhibitor, a collecting agent and a foaming agent; the inhibitor comprises water glass and sodium hexametaphosphate, the weight ratio of the water glass to the sodium hexametaphosphate is 6:4, the use amount of the inhibitor is 1000-3000g/t, the collecting agent is kerosene, and the foaming agent is octanol; the concentration of the coal slurry is 80-100 g/L. The method comprises the following steps: mixing clean coal with the strength of less than 10 microns with water to prepare coal slurry; shearing and stirring for 10 seconds, adding a collecting agent, shearing and stirring for 1 minute, and adding an inhibitor to obtain flotation ore pulp containing the agent; adding a foaming agent into ore pulp containing an accelerant and stirring to obtain flotation ore pulp containing the foaming agent and the accelerant; and (5) carrying out flotation and foam scraping. The invention has the beneficial effects that: has good inhibition effect and can fully reduce ash. The components of the coal and the inorganic mineral are not changed, the temperature and the pressure of a chemical method are avoided, the equipment is not seriously corroded, and the environment is not seriously polluted.
Description
Technical Field
The invention relates to the field of coal chemical industry, in particular to an anthracite ash reduction medicament.
Background
The coal slime flotation is a process of realizing separation at a phase interface by depending on the difference of the wettability of the surfaces of coal and gangue. Because the difference of natural surface properties of the coal and the gangue cannot be effectively separated, a flotation reagent is often required to be added in the flotation process to change the hydrophobicity of the surface of the coal, improve the floatability of the coal and realize the effective separation of the coal and the gangue. The inhibitor can effectively inhibit clay minerals in the coal slime to achieve the ash reduction effect, so that the research of the inhibitor has important significance for reducing the ash of the coal slime.
The inhibitor comprises inorganic inhibitor and organic inhibitor. The single inhibitor used at present has poor inhibiting effect and cannot sufficiently reduce ash.
Disclosure of Invention
The invention aims to solve the problems and provides an anthracite ash reduction medicament.
An anthracite ash reduction medicament is respectively added in the processes of shearing flocculation and flotation, and is characterized by comprising an inhibitor, a collector and a foaming agent;
the inhibitor comprises water glass and sodium hexametaphosphate, the weight ratio of the water glass to the sodium hexametaphosphate is 6:4, the use amount of the inhibitor is 1000-3000g/t,
collecting agent is kerosene, and foaming agent is sec-octanol;
the using steps are as follows:
step S1: mixing clean coal with the strength of less than 10 microns with water to prepare coal slurry;
step S2: adding a collecting agent after shearing and stirring for 10 seconds, and adding an inhibitor after shearing and stirring for 1 minute to obtain flotation pulp containing the agent;
step S3: adding a foaming agent into ore pulp containing an accelerant and stirring to obtain flotation ore pulp containing the foaming agent and the accelerant;
step S4: and (5) carrying out flotation and foam scraping.
Preferably, the shear stirring rotation speed is 2200-.
Preferably, the kerosene is used in an amount of 500-3000 mL/t.
Preferably, the secondary octanol is used in an amount of 100-120 mL/t.
Preferably, the concentration of the coal slurry in the step S1 is 10-30 g/L.
The kerosene amount was measured by a fixed-condition experiment, the conditions are shown in Table 1, the results are shown in Table 2, the clean coal yield curve is shown in FIG. 1, and the clean coal ash curve is shown in FIG. 2. The result shows that the yield of the final flotation clean coal does not change greatly with the increase of the consumption of the kerosene, and the ash content of the clean coal gradually rises, so that the consumption of the collecting agent is not suitable to be too high. Preferably 1000-2500 g/t.
TABLE 1 kerosene amount experiment fixed conditions
TABLE 2 kerosene amounts experimental results
For optimal slurry concentration, the following shear flocculation concentration test was designed:
TABLE 3 shear flocculation concentration fixation conditions
The results are shown in Table 4.
TABLE 4 shear flocculation flotation results table
The shearing flocculation concentration is increased, the yield of clean coal is increased, the ash content of the clean coal is reduced, and the ultra-low flotation concentration is not beneficial to ultra-low flotation.
The invention has the beneficial effects that:
has good inhibition effect and can fully reduce ash. The components of the coal and the inorganic mineral are not changed, so that the conditions of temperature, pressure and the like of a chemical method are avoided, the equipment is not seriously corroded, and the environment is not seriously polluted.
Description of the drawings:
FIG. 1 is a graph showing the yield of clean coal in the kerosene test of the present invention.
FIG. 2 is a graph of the ash content of clean coal in a kerosene test according to the present invention.
FIG. 3 is a graph of shear flocculation flotation concentration yield according to the invention.
FIG. 4 is a shear flocculation flotation concentration ash curve of the present invention.
Detailed Description
The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the invention in any way.
Example 1:
the inhibitor comprises water glass and sodium hexametaphosphate, the weight ratio of the water glass to the sodium hexametaphosphate is 6:4 (used as experimental medicament), the use amount of the inhibitor is 1000g/t,2000g/t and 3000g/t,
the collecting agent is kerosene, the using amount of the kerosene is 1000mL/t,
the foaming agent is sec-octanol, the using amount of the sec-octanol is 100mL/t,
the concentration of the coal slurry is 10g/L,
step S1: mixing clean coal with the strength of less than 10 microns with water to prepare coal slurry;
step S2: shearing and stirring at the rotating speed of 2200r/min, adding a collecting agent after shearing and stirring for 10 seconds, and adding an inhibitor after shearing and stirring for 1 minute to obtain flotation pulp containing a medicament;
step S3: adding a foaming agent into ore pulp containing an accelerant and stirring to obtain flotation ore pulp containing the foaming agent and the accelerant;
step S4: and (5) carrying out flotation and foam scraping.
The following results were obtained using the above experimental agents and water glass as inhibitors, respectively:
from the above, when the experimental agent is 2000g/t, the ash content of the clean coal is significantly reduced.
Example 2:
the inhibitor comprises water glass and sodium hexametaphosphate, the weight ratio of the water glass to the sodium hexametaphosphate is 6:4 (used as experimental medicament), the use amount of the inhibitor is 1000g/t,2000g/t and 3000g/t,
the collecting agent is kerosene, the using amount of the kerosene is 2000mL/t,
the foaming agent is sec-octanol, the using amount of the sec-octanol is 110mL/t,
the concentration of the coal slurry is 20g/L,
step S1: mixing clean coal with the strength of less than 10 microns with water to prepare coal slurry;
step S2: shearing and stirring, namely adding a collecting agent after shearing and stirring for 10 seconds at the rotation speed of 2300r/min, and adding an inhibitor after shearing and stirring for 1 minute to obtain flotation pulp containing a medicament;
step S3: adding a foaming agent into ore pulp containing an accelerant and stirring to obtain flotation ore pulp containing the foaming agent and the accelerant;
step S4: and (5) carrying out flotation and foam scraping.
The following results were obtained using the above experimental agents and water glass as inhibitors, respectively:
from the above, when the experimental agent is 2000g/t, the ash content of the clean coal is significantly reduced.
Example 3:
the inhibitor comprises water glass and sodium hexametaphosphate, the weight ratio of the water glass to the sodium hexametaphosphate is 6:4 (used as experimental medicament), the use amount of the inhibitor is 1000g/t,2000g/t and 3000g/t,
collecting agent is kerosene, the using amount of the kerosene is 3000mL/t,
the foaming agent is sec-octanol, the using amount of the sec-octanol is 120mL/t,
the concentration of the coal slurry is 30g/L,
step S1: mixing clean coal with the strength of less than 10 microns with water to prepare coal slurry;
step S2: shearing and stirring, namely adding a collecting agent after shearing and stirring for 10 seconds at the rotation speed of 2300r/min, and adding an inhibitor after shearing and stirring for 1 minute to obtain flotation pulp containing a medicament;
step S3: adding a foaming agent into ore pulp containing an accelerant and stirring to obtain flotation ore pulp containing the foaming agent and the accelerant;
step S4: and (5) carrying out flotation and foam scraping.
The following results were obtained using the above experimental agents and water glass as inhibitors, respectively:
from the above, when the experimental agent is 2000g/t, the ash content of the clean coal is significantly reduced.
Example 4:
the inhibitor comprises water glass and sodium hexametaphosphate, the weight ratio of the water glass to the sodium hexametaphosphate is 6:4 (used as experimental medicament), the use amount of the inhibitor is 1000g/t,2000g/t and 3000g/t,
collecting agent is kerosene, the using amount of the kerosene is 3000mL/t,
the foaming agent is sec-octanol, the using amount of the sec-octanol is 100mL/t,
the concentration of the coal slurry is 20g/L,
step S1: mixing clean coal with the strength of less than 10 microns with water to prepare coal slurry;
step S2: shearing and stirring at the rotating speed of 2400r/min for 10 seconds, adding a collecting agent, shearing and stirring for 1 minute, and adding an inhibitor to obtain flotation pulp containing a medicament;
step S3: adding a foaming agent into ore pulp containing an accelerant and stirring to obtain flotation ore pulp containing the foaming agent and the accelerant;
step S4: and (5) carrying out flotation and foam scraping.
The following results were obtained using the above experimental agents and water glass as inhibitors, respectively:
from the above, when the experimental agent is 2000g/t, the ash content of the clean coal is significantly reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. An anthracite ash reduction medicament is respectively added in the processes of shearing flocculation and flotation, and is characterized by comprising an inhibitor, a collector and a foaming agent;
the inhibitor comprises water glass and sodium hexametaphosphate, the weight ratio of the water glass to the sodium hexametaphosphate is 6:4, the use amount of the inhibitor is 1000-3000g/t,
collecting agent is kerosene, and foaming agent is sec-octanol;
the using steps are as follows:
step S1: mixing clean coal with the strength of less than 10 microns with water to prepare coal slurry;
step S2: adding a collecting agent after shearing and stirring for 10 seconds, and adding an inhibitor after shearing and stirring for 1 minute to obtain flotation pulp containing the agent;
step S3: adding a foaming agent into ore pulp containing an accelerant and stirring to obtain flotation ore pulp containing the foaming agent and the accelerant;
step S4: and (5) carrying out flotation and foam scraping.
2. The anthracite ash reducing agent as set forth in claim 1, wherein the shear stirring speed is 2200-2500 r/min.
3. The anthracite ash reducing agent as set forth in claim 1, wherein the amount of kerosene used is 500-3000 mL/t.
4. The anthracite ash reducing agent as set forth in claim 1, wherein the amount of sec-octanol used is 100-120 mL/t.
5. The anthracite ash reducing agent as set forth in claim 1, wherein the concentration of the coal slurry in step S1 is 10-30 g/L.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110827440.4A CN113522529A (en) | 2021-07-21 | 2021-07-21 | Anthracite ash reducing agent |
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| CN202110827440.4A CN113522529A (en) | 2021-07-21 | 2021-07-21 | Anthracite ash reducing agent |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4272250A (en) * | 1979-06-19 | 1981-06-09 | Atlantic Richfield Company | Process for removal of sulfur and ash from coal |
| WO1984004701A1 (en) * | 1983-05-21 | 1984-12-06 | British Petroleum Co Plc | Beneficiation of carbonaceous fuels |
| CN1042373A (en) * | 1988-10-31 | 1990-05-23 | 中国矿业大学北京研究生部 | Prepare water coal slurry fuel process with coal separating plant's duff |
| CN1181996A (en) * | 1997-09-17 | 1998-05-20 | 中国矿业大学北京研究生部 | Deep physical coal deliming and desulphurizing technology |
| CN104525385A (en) * | 2015-01-14 | 2015-04-22 | 中南大学 | Coal dressing collecting agent and preparing method thereof |
| CN105396684A (en) * | 2015-12-21 | 2016-03-16 | 深圳市瑞成世代实业有限公司 | Method for extracting ultra-low-ash-content pure coal from coal slime |
-
2021
- 2021-07-21 CN CN202110827440.4A patent/CN113522529A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4272250A (en) * | 1979-06-19 | 1981-06-09 | Atlantic Richfield Company | Process for removal of sulfur and ash from coal |
| WO1984004701A1 (en) * | 1983-05-21 | 1984-12-06 | British Petroleum Co Plc | Beneficiation of carbonaceous fuels |
| CN1042373A (en) * | 1988-10-31 | 1990-05-23 | 中国矿业大学北京研究生部 | Prepare water coal slurry fuel process with coal separating plant's duff |
| CN1181996A (en) * | 1997-09-17 | 1998-05-20 | 中国矿业大学北京研究生部 | Deep physical coal deliming and desulphurizing technology |
| CN104525385A (en) * | 2015-01-14 | 2015-04-22 | 中南大学 | Coal dressing collecting agent and preparing method thereof |
| CN105396684A (en) * | 2015-12-21 | 2016-03-16 | 深圳市瑞成世代实业有限公司 | Method for extracting ultra-low-ash-content pure coal from coal slime |
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Inventor after: Liu Wenchang Inventor after: Lu Yu Inventor after: Li Yongqiang Inventor after: Chen Junming Inventor after: Guo Jianbin Inventor after: Wang Beibei Inventor before: Liu Wenchang Inventor before: Guo Jianbin Inventor before: Lu Yu Inventor before: Li Yongqiang Inventor before: Chen Junming Inventor before: Wang Beibei |
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Application publication date: 20211022 |