CN104741211A - Grading size mixing and bulk flotation separation process - Google Patents
Grading size mixing and bulk flotation separation process Download PDFInfo
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- CN104741211A CN104741211A CN201510093153.XA CN201510093153A CN104741211A CN 104741211 A CN104741211 A CN 104741211A CN 201510093153 A CN201510093153 A CN 201510093153A CN 104741211 A CN104741211 A CN 104741211A
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- mixing
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
Abstract
The invention discloses a grading size mixing and bulk flotation separation process. The grading size mixing and bulk flotation separation process comprises the following steps that 1, flotation feeding coal slime is pumped to a grading cyclone to be graded according to a certain granularity (0.074mm or 0.125mm), and coarse pulp and fine pulp obtained after grading enter a size mixing device for size pre-mixing; 2, the coarse pulp enters a single-section impeller size mixing agitator, the size mixing time is no less than 4 min so as to ensure sufficient adsorption of flotation collectors on the surfaces of mine particles, the fine pulp enters a multi-section forced stirring size mixing device provided with three layers of stirring impellers and a high stirring rotation speed, and the linear velocity of the stirring impellers is no less than 6 m/s; 3, the coarse pulp and fine pulp after size pre-mixing are mixed through a pipeline and fed to a flotation column/machine, and flotation clean coal and flotation tailings are obtained after separation of the flotation column/machine. The grading size mixing and bulk flotation separation process is simple in technological process, low in investment, low in energy consumption, low in operation expense, high in separation efficiency and remarkable in economic benefit.
Description
Technical field
The present invention relates to mud coal sorting technology field, particularly relate to a kind of classification and size mixing-bulk flotation sorting process.
Background technology
The sorting upgrading of difficult separation coal mud is the focus of domestic and international expert research always, increases the coarse grain rate of recovery key that be coal slime flotation be efficiently separated selective with particulate.Generally speaking, slime separation, by size mixing and flotation two parts form, enters float coal mud and after sizing mixing, enters flotation device (flotation column) sub-elect cleaned coal and tail coal.Outstanding problem that current most of coal preparation plants flotation link faces is that reagent consumption is large, cleans ash is high on the one hand, and mainly microfine specific surface is large for this, has adsorbed a large amount of floating agents, and the thin mud of high ash is joined with moisture and caused by being carried secretly to floatation clean coal; Then that tail coal ash content is low on the other hand, a large amount of low grey coarse granules fails effectively to be reclaimed, main cause be coarse granule surface hydrophobic improve inadequate, with bubble adhesion loosely and the probability that comes off is high, thin sludge-polluted with run thick problem and to divide at easy floating difficult separation coal mud and choose performance particularly outstanding.Easily floating difficult separation coal mud principal character is that thin cement content is high, flotation speed is fast, medium degree of metamorphism, floatability good (as coking coal, rich coal etc.), conventional flotation is difficult to obtain low ash extract coal and height ash tail coal, and this part coal slime often belongs to scarce resource, the sorting strengthening this part coal slime is significant.
Conventional flotation only pays close attention to flotation operation, carry out reinforcing particle by flotation conditions (floatation concentration, aeration quantity etc.) optimization to be separated, but the importance of operation of sizing mixing is ignored, in fact sizing mixing has been the significant process that medicament disperses, particulate surface hydrophobic improves, and is the effective way improving mineralising efficiency in floatation process.In flotation, thin sludge-polluted and the thick problem of race are adsorbed and poor selectivity close relation the lack of balance of medicament with thickness grain in process of sizing mixing.Microfine is too adsorbed medicament makes part intermediate density level or the thin mud hydrophobicity of high ash improve and enter floatation clean coal, and coarse grain makes low ash particle mud improved hydrophobicity not enough not to the absorption of medicament and is lost in tail coal, size mixing operation Chinese medicine and particle non-selective adsorption has caused thin sludge-polluted and has run thick problem, makes flotation be difficult to reach ideal effect.The process of sizing mixing should give prominence to the selective absorption of particle and medicament to strengthen the hydrophobic difference on coal grain and spoil surface, cause cleaned coal to pollute for middle ash or the thin absorption of mud to medicament non-selectivity of high ash and the absorption of coarse grain and medicament is loosely easily lost in problem in tail coal, propose one and meet size mixing demand and flow process simple coal slime efficient separation technique of thickness grain simultaneously and utilize be of great importance for realizing coal resources high effect cleaningization.
Summary of the invention
The object of the invention is to provide a kind of simple slime separation technique improving thick fine particles flotation effect, solve that thin sludge-polluted in conventional flotation technique is serious, coarse grain be easily lost in problem in tail coal, provide a kind of low cost, technique is simple, small investment, the efficiency of separation are high, the process of business efficiency easy floating difficult separation coal mud significantly.
The present invention adopts following technical scheme:
Classification of the present invention sizes mixing-and bulk flotation sorting process is as follows:
A, operation of sizing mixing: under the condition adding flotation collector, coarse grain ore pulp is sized mixing in the agitator of individual layer impeller, under the condition of rotating speed that ensures to size mixing, strengthening prolongation when sizing mixing the m-time of sizing mixing be not less than 4min; Particulate ore pulp is sized mixing in multistage action of forced stirring bucket, and under the condition ensureing the time of sizing mixing, strengthening improves speed of agitator-agitator arm linear velocity and is not less than 6m/s;
B, size mixing after flotation operation: the thickness grain ore pulp after sizing mixing respectively is entered in flotation column/machine carried out sorting by gravity flow after pipeline mixing, obtains floatation clean coal and floating tail-coal.
Classification of the present invention sizes mixing-and the concrete grammar of bulk flotation sorting process is as follows:
(1) graded operation:
Delivered in classifying cyclone by floatation feed coal slime compression pump and carry out classification according to certain particle size (0.074mm or 0.125mm), the coarse grain ore pulp obtained after classification and particulate ore pulp enter size mixing equipment and size mixing in advance;
(2) to size mixing operation:
Coarse grain ore pulp enters single hop impeller and to size mixing agitator, and the time of sizing mixing is not less than 4min to guarantee the abundant absorption of flotation collector on coal grain surface; Particulate ore pulp enters in multistage action of forced stirring size mixing equipment, and this equipment is provided with three layers of agitator arm and speed of agitator is high, and agitator arm linear velocity is not less than 6m/s;
(3) flotation operation:
Be given to after coarse grain ore pulp after sizing mixing in advance is mixed by pipeline with particulate ore pulp in flotation column/machine, after flotation column/machine sorting, obtain floatation clean coal and floating tail-coal.
In step (1), float coal mud will be entered and obtain coarse grain ore pulp and particulate ore pulp with 0.074mm or 0.125mm classification.
In step (2), when coarse grain ore pulp and particulate ore pulp carry out sizing mixing operation, add diesel oil or kerosene as flotation collector, consumption is 100-300g/t.Ensure that into floating pulp density be 60-80g/L by adding the water yield.
Good effect of the present invention is as follows:
The present invention is the practical technique based on coal slime flotation, sizes mixing Process Energy input raising thickness grain to medicament adsorption effect by strengthening thickness grain.Coarse grain fully ensures that under certain speed conditions of sizing mixing the time of sizing mixing strengthens it to medicament suction-operated to improve its rate of recovery; Under the condition that particulate met the demands in the time of sizing mixing, strengthening is sized mixing rotating speed effect, and the balance reaching desorption probability and collision probability is selective with what strengthen that particulate and medicament adsorb.Classification is sized mixing and not only can be met large or fine granule to the different demands of medicament in amount, the more important thing is that the coupling of the energy input of being sized mixing in mixing plant in difference by operation large or fine granule of sizing mixing ensures that particle and medicament are adsorbed on the raising in matter, first Application classification sizes mixing-and bulk flotation technique realization thickness grain in difference sizes mixing mixing plant sizes mixing the coupling of Process Energy to realize the efficient separation of thick fine slime.
Its major advantage has:
A, the classification of float coal mud will be entered after size mixing separately, the pharmaceutical quantities demand of thickness grain is met by different agents system, can effectively avoid particulate because its specific area is large, high adsorption capacity and competitive Adsorption to medicament, solve thick fine slime and mixing the disequilibrium of sizing mixing in process floating agent amount, ensure that balanced with in the particulate rate of recovery of coarse grain;
B, coarse grain ore pulp under certain rotating speed of sizing mixing, strengthen the abundant guarantee of time of sizing mixing in multistage action of forced stirring size mixing equipment; Particulate ore pulp in single hop impeller sizes mixing agitator under certain time of sizing mixing, strengthen the high rotating speed input of impeller of sizing mixing, in the energy input that the process of sizing mixing is different, particle and medicament are realized to thick fine slime and is adsorbed on raising in matter, facilitate thick fine slime and realize Selective Separation according to hydrophobic difference in floatation process.
C, this technological process are simple, small investment, and power consumption is little, and operating cost is low, and compare with traditional floatation process, the efficiency of separation is high, remarkable in economical benefits.
Accompanying drawing explanation
Fig. 1 is sorting process FB(flow block) of the present invention.
Fig. 2 is that classification of the present invention is sized mixing the-installation drawing of bulk flotation sorting process.
In figure: size mixing agitator, E particulate of A floatation feed pond, B classification pan feeding pump, C classifying cyclone, D coarse grain is sized mixing the mixed ore pulp of thickness grain ore pulp, 7 floatation clean coals, 8 floating tail-coals that agitator, F flotation column (machine), G bubble generator, H circulating pump, I cleaned coal pond, J tail coal pond, 1 selected buoyant, 2 particulate ore pulps, 3 coarse grain ore pulps, 4 medicaments, 5 recirculated waters, 6 have sized mixing in advance.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
Example: as shown in Figure 1, classification of the present invention is sized mixing-bulk flotation technique, first delivered in classifying cyclone by floatation feed coal slurrypump and carry out classification according to certain particle size (0.074mm or 0.125mm), the coarse grain ore pulp obtained after classification and particulate ore pulp enter size mixing equipment and size mixing in advance.According to the different requirements that coarse grain ore pulp and particulate ore pulp input energy of sizing mixing, mate with different stirring size mixing equipments.Coarse grain ore pulp feeds single hop impeller and to size mixing agitator, fully ensures to size mixing the time to guarantee the abundant absorption of flotation collector at particle surface; Particulate ore pulp feeds in multistage action of forced stirring size mixing equipment, and this equipment is provided with three layers of agitator arm and speed of agitator is high, and particulate ore pulp and flotation collector can be made fully to disperse in size mixing equipment, realizes effective absorption of fine slime and collecting agent.Under coarse grain ore pulp on-line velocity is not less than 4m/s, strengthen the abundant guarantee of time of sizing mixing; Particulate ore pulp is being not less than under 2min, strengthens the high rotating speed input of impeller of sizing mixing.Be given in flotation column (machine) after coarse grain ore pulp after sizing mixing in advance is mixed by pipeline with particulate ore pulp, after flotation column (machine) sorting, obtain floatation clean coal and floating tail-coal.Laboratory results shows, and compared to conventional flotation, classification sizes mixing-and bulk flotation can improve clean coal yield 0.5%, reduce cleans ash 1.5% under identical medicine consumption condition.
As shown in Figure 2, classification of the present invention size mixing-device of bulk flotation technique mainly comprises floatation feed bucket A, classification pan feeding pump B, classifying cyclone C, coarse grain size mixing agitator D, particulate sizes mixing agitator E, flotation column (machine) F, bubble generator G, circulating pump H, cleaned coal bucket I, tail coal bucket J.First floatation feed 1 is fed floatation feed bucket A to cushion, to ensure that cyclone feed evenly obtains better grading effect, then deliver to classifying cyclone C with classification pan feeding pump B with certain pressure and carry out classification and obtain particulate ore pulp 2 and coarse grain ore pulp 3.Particulate ore pulp 2 flows automatically in multistage action of forced stirring size mixing equipment E, and adds a certain amount of medicament 4, sizes mixing under rotating speed inputs make particulate ore pulp and medicament fully disperse to size mixing at necessarily size mixing time and height of guarantee; Coarse grain ore pulp 3 is sized mixing in agitator D from flowing to single hop impeller, adds a certain amount of medicament 4 and sizes mixing under the time and abundant guarantee is sized mixing at certain speed of agitator, can add a certain amount of recirculated water 5 to ensure the concentration of sizing mixing that coarse grain ore pulp is suitable according to actual conditions.The mixed ore pulp 6 of thickness grain ore pulp of having sized mixing in advance carries out sorting by pipeline self to flotation column (machine) F, obtains floatation clean coal 7 and enters cleaned coal pond I and tail coal pond J respectively with floating tail-coal 8.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalents thereof.
Claims (4)
1. classification is sized mixing-bulk flotation a sorting process, it is characterized in that:
A, operation of sizing mixing: under the condition adding flotation collector, coarse grain ore pulp is sized mixing in the agitator of individual layer impeller, under the condition of rotating speed that ensures to size mixing, strengthening prolongation when sizing mixing the m-time of sizing mixing be not less than 4min; Particulate ore pulp is sized mixing in multistage action of forced stirring bucket, and under the condition ensureing the time of sizing mixing, strengthening improves speed of agitator-agitator arm linear velocity and is not less than 6m/s;
B, size mixing after flotation operation: the thickness grain ore pulp after sizing mixing respectively is entered in flotation column/machine carried out sorting by gravity flow after pipeline mixing, obtains floatation clean coal and floating tail-coal.
2. classification as claimed in claim 1 is sized mixing-bulk flotation sorting process, it is characterized in that: the concrete grammar of described technique is as follows:
(1) graded operation:
Delivered in classifying cyclone by floatation feed coal slime compression pump and carry out classification according to granularity, the coarse grain ore pulp obtained after classification and particulate ore pulp enter size mixing equipment and size mixing in advance;
(2) to size mixing operation:
Coarse grain ore pulp enters single hop impeller and to size mixing agitator, and the time of sizing mixing is not less than 4min to guarantee the abundant absorption of flotation collector on coal grain surface; Particulate ore pulp enters in multistage action of forced stirring size mixing equipment, and this equipment is provided with three layers of agitator arm and speed of agitator is high, and agitator arm linear velocity is not less than 6m/s;
(3) flotation operation:
Be given to after coarse grain ore pulp after sizing mixing in advance is mixed by pipeline with particulate ore pulp in flotation column/machine, after flotation column/machine sorting, obtain floatation clean coal and floating tail-coal.
3. classification as claimed in claim 2 is sized mixing-bulk flotation sorting process, it is characterized in that: in step (1), will enter float coal mud and obtain coarse grain ore pulp and particulate ore pulp with 0.074mm or 0.125mm classification.
4. classification as claimed in claim 2 is sized mixing-bulk flotation sorting process, it is characterized in that: in step (2), when coarse grain ore pulp and particulate ore pulp carry out sizing mixing operation, add diesel oil or kerosene as flotation collector, consumption is 100-300g/, ensures that into floating pulp density be 60-80g/L by adding the water yield.
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| CN201510093153.XA CN104741211A (en) | 2015-03-02 | 2015-03-02 | Grading size mixing and bulk flotation separation process |
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Cited By (6)
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| CN106512769A (en) * | 2016-12-13 | 2017-03-22 | 安徽理工大学 | System and method for uniformly mixing fine crushed coal slime with coarse grain lump coal |
| CN108262173A (en) * | 2018-01-20 | 2018-07-10 | 华北科技学院 | A kind of coal slime cooperates with floatation process |
| CN109365140A (en) * | 2018-11-15 | 2019-02-22 | 中国矿业大学 | A kind of width sized coal mud flotation method |
| CN109759241A (en) * | 2019-01-31 | 2019-05-17 | 中国矿业大学 | A kind of device and method of width particle size fraction coal slime flotation |
| CN111298985A (en) * | 2020-04-14 | 2020-06-19 | 高台县宏源矿业有限责任公司 | Method for flotation recovery of fluorite concentrate from fluorite tailings |
| CN112934482A (en) * | 2021-03-16 | 2021-06-11 | 中国恩菲工程技术有限公司 | Flotation method and flotation device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106512769A (en) * | 2016-12-13 | 2017-03-22 | 安徽理工大学 | System and method for uniformly mixing fine crushed coal slime with coarse grain lump coal |
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| CN108262173A (en) * | 2018-01-20 | 2018-07-10 | 华北科技学院 | A kind of coal slime cooperates with floatation process |
| CN109365140A (en) * | 2018-11-15 | 2019-02-22 | 中国矿业大学 | A kind of width sized coal mud flotation method |
| CN109759241A (en) * | 2019-01-31 | 2019-05-17 | 中国矿业大学 | A kind of device and method of width particle size fraction coal slime flotation |
| CN109759241B (en) * | 2019-01-31 | 2019-11-29 | 中国矿业大学 | A kind of device and method of width particle size fraction coal slime flotation |
| CN111298985A (en) * | 2020-04-14 | 2020-06-19 | 高台县宏源矿业有限责任公司 | Method for flotation recovery of fluorite concentrate from fluorite tailings |
| CN111298985B (en) * | 2020-04-14 | 2021-12-24 | 高台县宏源矿业有限责任公司 | Method for flotation recovery of fluorite concentrate from fluorite tailings |
| CN112934482A (en) * | 2021-03-16 | 2021-06-11 | 中国恩菲工程技术有限公司 | Flotation method and flotation device |
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