CN104923387A - Method for recycling wet process coal washing screen underflow - Google Patents
Method for recycling wet process coal washing screen underflow Download PDFInfo
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- CN104923387A CN104923387A CN201510331211.8A CN201510331211A CN104923387A CN 104923387 A CN104923387 A CN 104923387A CN 201510331211 A CN201510331211 A CN 201510331211A CN 104923387 A CN104923387 A CN 104923387A
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- Prior art keywords
- coal
- wet process
- mud bucket
- recycling
- underflow
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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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- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention discloses a method for recycling wet process coal washing screen underflow. According to the method, the screen underflow generated by wet process coal dressing can return onto a screen to be recycled repeatedly through the characteristic that tiny particulate matter in a saturation state on the dehydration (medium-removal) screen surface can still pass through the screen surface, a good recycling effect can be achieved, special-purpose equipment is needless, and the recycling technological process is simplified. The method is suitable for recycling and treating other wet process beneficiation screen underflow.
Description
Technical field
The present invention relates to the recovery process of wet process coal cleaning screenings, as coarse slime or wash the coarse grained recovery method of cash.
Background technology
The coarse grain slime recovery of prior art coal washery main flow is mainly by Horizontal centrifugal dehydrator, and the special equipments such as high frequency shale shaker reclaim, and equipment cost is higher, and power consumption is large, and technological process is comparatively numerous and diverse.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provides one can recycle wet process coal cleaning screenings by special equipment, and the more simple recovery method of technological process compared to existing technology.
Technical scheme of the present invention is: a kind of recovery method of wet process coal cleaning screenings, comprises the following steps:
The underflow materials of tail coal mud bucket is directly got to through Pulp pump the front washing cash sculping screen discharge end first water spray and is reclaimed;
Tail coal mud bucket overflow material enters cleaned coal mud bucket or two sections of thickeners;
The underflow materials of cleaned coal mud bucket enters one section of thickener through Pulp pump;
The front that the underflow materials of one section of thickener directly gets to head coal sculpingscreen discharge end first water spray through Pulp pump is reclaimed;
If the front that the underflow materials of three products coal washery cleaned coal mud bucket directly gets to head coal sculpingscreen discharge end first water spray through Pulp pump is reclaimed, the overflow material of cleaned coal mud bucket enters floatation system.
Described screenings is coarse slime or washes cash coarse granule.
Design philosophy of the present invention is: dehydration (de-mediated) compass screen surface in the saturated condition finely ground particles also can walk goods by compass screen surface, such as the screenings of operationally 10 square metres of compass screen surface generations reclaims with the compass screen surface of this sieve 1 square metre again, major part material still can pass through compass screen surface, the present invention utilizes this characteristic, the screenings that wet dressing is produced returns on this sieve and repeatedly reclaims, reach good recovering effect, and need not special equipment, and simplify recovery process flow process.
Accompanying drawing explanation
Fig. 1 is the process chart that in prior art, two product dense medium separation screenings reclaim;
Fig. 2 is the process chart that in the present invention, two product dense medium separation screenings reclaim.
Detailed description of the invention
Below for two product dense medium separation screenings recovery process also by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
As shown in Figure 2, a kind of recovery method of wet process coal cleaning screenings, comprises the following steps:
The underflow materials of tail coal mud bucket is directly got to wash on cash sculping screen through Pulp pump and is reclaimed, and described cash sculping screen of washing is provided with multiple tracks water spray, and the underflow materials of tail coal mud bucket sprays the front in washing cash sculping screen discharge end first water spray;
Tail coal mud bucket overflow material enters cleaned coal mud bucket through overflow pipe;
The underflow materials of cleaned coal mud bucket enters one section of thickener through Pulp pump;
The underflow materials of one section of thickener is directly got on cleaned coal recovery sieve through Pulp pump and is reclaimed, and described cleaned coal reclaims sieve and is provided with multiple tracks water spray, and the underflow materials of one section of thickener sprays the front in cleaned coal recovery sieve discharge end first water spray;
By above method the screenings that wet process coal cleaning produces reclaimed repeatedly and can obtain good recovering effect.
Claims (3)
1. a recovery method for wet process coal cleaning screenings, is characterized in that, comprises the following steps:
(1) underflow materials of tail coal mud bucket is directly got to wash on cash sculping screen through Pulp pump and is reclaimed;
(2) tail coal mud bucket overflow material enters cleaned coal mud bucket or two sections of thickeners;
(3) underflow materials of cleaned coal mud bucket (one section of thickener) is directly got on head coal sculpingscreen through Pulp pump and is reclaimed;
(4) the overflow material of cleaned coal mud bucket enters floatation system or coal slime treatment system.
2. the recovery method of a kind of wet process coal cleaning screenings according to claim 1, is characterized in that, the underflow materials of tail coal mud bucket is sprayed the front in washing cash sculping screen discharge end first water spray.
3. the recovery method of a kind of wet process coal cleaning screenings according to claim 1, is characterized in that, the underflow materials of cleaned coal mud bucket (one section of thickener) is sprayed the front in head coal sculpingscreen discharge end first water spray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510331211.8A CN104923387A (en) | 2015-06-16 | 2015-06-16 | Method for recycling wet process coal washing screen underflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510331211.8A CN104923387A (en) | 2015-06-16 | 2015-06-16 | Method for recycling wet process coal washing screen underflow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104923387A true CN104923387A (en) | 2015-09-23 |
Family
ID=54110999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510331211.8A Pending CN104923387A (en) | 2015-06-16 | 2015-06-16 | Method for recycling wet process coal washing screen underflow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104923387A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB858756A (en) * | 1956-07-27 | 1961-01-18 | Edmond Harvengt | Process and apparatus for the treatment of materials in very small particles, particularly coal and ore slimes |
| CN102553703A (en) * | 2012-01-12 | 2012-07-11 | 中国矿业大学 | Coal slime treatment process for deslimed dense-medium coal separation |
| CN102847606A (en) * | 2012-09-01 | 2013-01-02 | 山东科技大学 | Coarse slime separation process |
| CN103464272A (en) * | 2013-09-02 | 2013-12-25 | 山东科技大学 | Coarse coal slime two-section water medium sorting method |
| CN103816992A (en) * | 2014-03-26 | 2014-05-28 | 威海市海王旋流器有限公司 | Coarse slime dense medium sorting technology and system |
| CN104084293A (en) * | 2014-07-29 | 2014-10-08 | 四川达竹煤电（集团）有限责任公司石板选煤发电厂 | Dense medium coarse slime sorting device and sorting process |
| CN104525358A (en) * | 2014-12-22 | 2015-04-22 | 纪玉华 | Process of coarse coal slime back washing in pre-desliming dense medium cyclone sorting |
-
2015
- 2015-06-16 CN CN201510331211.8A patent/CN104923387A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB858756A (en) * | 1956-07-27 | 1961-01-18 | Edmond Harvengt | Process and apparatus for the treatment of materials in very small particles, particularly coal and ore slimes |
| CN102553703A (en) * | 2012-01-12 | 2012-07-11 | 中国矿业大学 | Coal slime treatment process for deslimed dense-medium coal separation |
| CN102847606A (en) * | 2012-09-01 | 2013-01-02 | 山东科技大学 | Coarse slime separation process |
| CN103464272A (en) * | 2013-09-02 | 2013-12-25 | 山东科技大学 | Coarse coal slime two-section water medium sorting method |
| CN103816992A (en) * | 2014-03-26 | 2014-05-28 | 威海市海王旋流器有限公司 | Coarse slime dense medium sorting technology and system |
| CN104084293A (en) * | 2014-07-29 | 2014-10-08 | 四川达竹煤电（集团）有限责任公司石板选煤发电厂 | Dense medium coarse slime sorting device and sorting process |
| CN104525358A (en) * | 2014-12-22 | 2015-04-22 | 纪玉华 | Process of coarse coal slime back washing in pre-desliming dense medium cyclone sorting |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150923 |