CN103341398B - Coal separation method in which lump coal and fine coal dense media share same recovery system - Google Patents
Coal separation method in which lump coal and fine coal dense media share same recovery system Download PDFInfo
- Publication number
- CN103341398B CN103341398B CN201310240813.3A CN201310240813A CN103341398B CN 103341398 B CN103341398 B CN 103341398B CN 201310240813 A CN201310240813 A CN 201310240813A CN 103341398 B CN103341398 B CN 103341398B
- Authority
- CN
- China
- Prior art keywords
- coal
- medium
- fine
- lump
- qualified
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention belongs to the technical field of coal, relates to a dense medium coal separation method, in particular to a coal separation method in which lump coal and fine coal dense media share a same recovery system. The method includes the steps that classification desliming is conducted on raw coal, lump coal dense medium separation is conducted on the lump coal, and fine coal dense medium separation is conducted on first fine coal after being desliming; second lump clean coal and second fine clean coal are combined, then secondary medium draining classification is conducted on the second lump clean coal and the second fine clean coal, lump gangues and second fine gangues are combined, then secondary medium draining is conducted on the lump gangues and the second fine gangues, and qualified media are acquired through magnetic separation and fed to lump coal dense medium separation and fine coal dense medium separation after shunt. The second lump clean coal and the second fine clean coal are combined, and secondary medium draining classification is conducted on both the second lump clean coal and the second fine clean coal at the same time, so that the suspension liquid density of the lump coal dense media and the suspension liquid density of the fine coal dense media are independently adjusted. The method is simple in process, easy and convenient to operate, good in operational stability, high in classification accuracy, flexible in product structure, and low in investment and operating cost.
Description
Technical field
The invention belongs to colliery engineering field.Particularly, the present invention relates to heavy media coal separation method, particularly the shared coal preparation method of a kind of lump coal and smalls dense media recovery system.
Background technology
Heavy media coal separation method has obtained commercial Application widely.There are two kinds of dense medium separation techniques according to material size difference: preparation of unsized raw coal, preparation of sized raw coal.In preparation of unsized raw coal technique, lump coal and smalls mix, enter heavy medium cyclone simultaneously, in same heavy-media suspension environment, separate, this technique is poor to lump coal and the larger coal adaptability of smalls density consist difference, in addition, the wide grade of pan feeding distributes and has significantly reduced separating effect.And both mix the flexibility and the market adaptability that have reduced product structure.In preparation of sized raw coal technique, selected separately after both classifications, lump coal separation and smalls sorting are two independently systems, its medium recovery system is separate, the complexity that this has not only strengthened sorting process, has increased screening installation quantity, has also increased substantially investment and operating cost.
Summary of the invention
Therefore, the object of the invention is for the deficiencies in the prior art, provide that a kind of technique is simple, easy to operate, sharpness of separation is high, good operation stability, product structure flexibly, investment and the cheap lump coal of operating cost and the shared coal preparation method of smalls dense media recovery system.
For above-mentioned purpose, technical scheme of the present invention comprises the following steps:
A) raw coal is carried out to graded desliming, obtain lump coal, the first smalls and the first black water;
B
1) lump coal obtaining in step a) is carried out to lump coal dense medium separation, obtain first block of cleaned coal and piece spoil;
B
2) the first smalls obtaining in step a) is carried out to desliming, obtain the second smalls and coal slime; Preferably, gained the second smalls enters mixing tank, carries out smalls dense medium separation, obtains the first fine cleaned coal and the first last spoil;
C
1) by step b
1) in first block of cleaned coal obtaining carry out a de-mediated, obtain second block of cleaned coal and the first qualified medium;
C
2) by step b
2) in the first fine cleaned coal of obtaining carry out a de-mediated, obtain the second fine cleaned coal and the second qualified medium;
D) by step c
1) in the second block of cleaned coal and the step c that obtain
2) in obtain second fine cleaned coal merge, carry out secondary de-mediated classification, obtain the 3rd block of cleaned coal, the 3rd fine cleaned coal, the 3rd qualified medium and first rare medium;
E) the 3rd fine cleaned coal obtaining in step d) is carried out to centrifugal dehydration, obtain the 4th fine cleaned coal and the second black water.
According to method of the present invention, described method also comprises step f): the first last spoil is carried out to a de-mediated, obtain the second last spoil and the 4th qualified medium.
According to method of the present invention, described method also comprises step g): piece spoil and the second last spoil are merged, carry out secondary de-mediated, obtain spoil, second rare medium and the 5th qualified medium.
According to method of the present invention, described method also comprises step h): the first qualified medium enters qualified medium bucket, and the second qualified medium, the 4th qualified medium and the 5th qualified medium enter mixing tank.
According to method of the present invention, described method also comprises step I): the 3rd qualified medium is shunted, part shunting enters qualified medium bucket, part shunting merges with first rare medium and second rare medium, carry out magnetic separation, obtain the 3rd black water and dense medium, preferably, described dense medium enters qualified medium bucket and mixing tank after shunting.
Qualified medium is less than by water, magnetite powder and particle diameter the mixture that the coal slime of 0.5mm forms, and three's proportionate relationship has determined the density of qualified medium.The inventor finds, by the 3rd qualified medium is shunted, can regulate well the ratio of nonmagnetics in qualified medium bucket, i.e. coal slime ratio.In one embodiment of the invention, the shunt volume of the 3rd qualified medium can be to control like this: the magnetic-substance content meter that can measure coal slurry content in qualified medium bucket is housed on medium pipeline, coal slurry content measured value and setting value are compared, regulate and control the open degree of shunting according to comparative result.For example, when measured value is higher than when setting value, can increase open degree, thereby improve the shunt volume entering in magnetic separator; When measured value is lower than when setting value, can reduce open degree, thereby reduce the shunt volume entering in magnetic separator.Setting value can be determined according to actual production scale and separating density, and the selection of setting value is known those skilled in the art.
The inventor also finds, by dense medium is shunted, can regulate well the ratio of dense medium.In one embodiment of the invention, this shunting can regulate and control by the following method: on the export pipeline of qualified medium bucket and mixing tank, be separately installed with densitometer, control according to densitometer size the quantity of circulating water of adding, according to water circulation control shunt volume.For example, when densitometer show value is during higher than required value, increase the amount of adding recirculated water, reduce the shunt volume of dense medium simultaneously.If the quantity of circulating water of adding reduces always, illustrate that the shunt volume of dense medium is few, need many shuntings, until the quantity of circulating water of adding reaches stationary value.Required value can be determined according to actual production scale and separating density, and the selection of required value is known those skilled in the art.
According to method of the present invention, described method also comprises step j): described the first black water, the second black water, the 3rd black water and coal slime are entered to slurry circulating system.
According to method of the present invention, described method also comprises step k): the qualified medium in described qualified medium bucket is fed to lump coal dense medium separation.
According to method of the present invention, described method also comprises step l): in described qualified medium bucket, add magnetite powder and recirculated water; Preferably, also comprise step m): in described mixing tank, add magnetite powder and recirculated water.
In said method, the object that adds magnetite powder and recirculated water is the density adjusting from the heavy-media suspension of qualified medium bucket and mixing tank.Preferably (but being not limited to), the addition of magnetite powder equates with the amount of the magnetite powder that product after sorting is taken away.For example, can determine according to the regulation in " coal preparation technique design practical technique handbook " addition of magnetite powder, per ton block of cleaned coal and piece spoil are all taken away 0.3kg magnetite powder, and fine cleaned coal per ton and last spoil are all taken away 0.6kg magnetite powder.
According to method of the present invention, described method also comprises step n): in the secondary de-mediated step described in step g), add recirculated water.
According to method of the present invention, described method also comprises step o): to graded desliming step, step b described in step a)
2) described in desliming step and/or secondary de-mediated classification step described in step d) in add recirculated water.
The inventor finds, adds recirculated water can strengthen significantly the effect of graded desliming, desliming and/or secondary de-mediated classification in said method.Preferably (but being not limited to), the addition of recirculated water can be carried out according to the regulation in " coal washing engineering design specification GB50359-2010 " and " coal preparation technique design practical technique handbook ", i.e. and injection flow rate when graded desliming and desliming is 2.0m
3/ ton coal, injection flow rate when secondary de-mediated classification is 1.5m
3/ ton coal.
Except as otherwise noted, the raw coal described in the present invention refers to from the coal of down-hole extraction, through prescreening (screen-aperture can for but be not limited to 150mm) or particle diameter is greater than to the coal that the particle diameter obtaining after the coarse coal fragmentation of 150mm is less than 150mm.
Except as otherwise noted, the first smalls described in the present invention obtains smalls after referring to the classified desliming of raw coal, the second smalls refers to the smalls that the first smalls obtains after desliming, wherein, " first " and " second " there is no concrete meaning, only distinguishes for the material that different step is obtained to same title.Similarly, in the present invention all the other described " first ", " second ", " the 3rd ", " the 4th " and " the 5th " also only distinguish for the material of same title that different step is obtained everywhere.
It will be appreciated by those skilled in the art that and can select various known equipment each step for the method for the invention according to actual production scale.For example, in conventional equipment, can select graded desliming to sieve for graded desliming of the present invention, select dense media shallow-tank separator for lump coal dense medium separation of the present invention, select desliming screen for desliming of the present invention, select dense medium cyclone for smalls dense medium separation of the present invention, select the de-mediated of gravity flow screen for first block of cleaned coal of the present invention, select the de-mediated of fine cleaned coal de-mediated sieve bend for the first fine cleaned coal of the present invention, select the secondary de-mediated classification of cleaned coal vibration de-mediated classifying screen for second block of cleaned coal and second fine cleaned coal of merging of the present invention, select centrifugal dehydrator for centrifugal dehydration of the present invention, select the de-mediated of last spoil de-mediated sieve bend for the first last spoil of the present invention, select spoil vibration sculping screen for the piece spoil of merging of the present invention and the secondary de-mediated of the second last spoil, select part flow arrangement for shunting of the present invention, select magnetic separator for magnetic separation of the present invention.
Compared with prior art, the present invention at least has following beneficial effect:
(1) piece spoil and second block of cleaned coal all enter smalls de-mediated system, have saved step and the equipment such as piece spoil vibration sculping screen and piece cleaned coal vibration sculping screen in prior art, have both simplified technique, have reduced again cost;
(2) second block of cleaned coal and the second fine cleaned coal are merged, jointly carry out secondary de-mediated classification, realized the independent of lump coal and smalls heavy-media suspension density and regulated, easy and simple to handle, good operation stability, sharpness of separation is high;
(3) carry out after secondary de-mediated classification at piece spoil and the second last spoil, first rare medium and second rare medium directly carry out magnetic separation, save step and the equipment such as rare medium bucket, rare medium pump and corresponding wear-resisting pipeline in prior art, reduced investment and operation cost.
Brief description of the drawings
Below, describe by reference to the accompanying drawings embodiment of the present invention in detail, wherein:
Fig. 1 is the flow chart of an embodiment of coal preparation method of the present invention.
description of reference numerals:
1-raw coal, 2, 7, 27, 31, 44-recirculated water, 3-graded desliming, 4-the first smalls, 5-lump coal, 6-the first black water, 8-desliming, 9-the second smalls, 10-coal slime, 11-lump coal dense medium separation, 12-mixing tank, first block of cleaned coal of 13-, 14-piece spoil, 15-smalls dense medium separation, the last spoil of 16-first, 17-the first fine cleaned coal, 18, 19, a de-mediated of 20-, 21-the first qualified medium, second block of cleaned coal of 22-, the last spoil of 23-second, 24-the 4th qualified medium, 25-the second qualified medium, 26-the second fine cleaned coal, bis-de-mediated of 28-, the rare medium of 29-second, 30-the 5th qualified medium, bis-de-mediated classifications of 32-, 33-the 3rd qualified medium, the rare medium of 34-first, 35-the 3rd fine cleaned coal, 36, 42-shunting, 37-centrifugal dehydration, 38-magnetic separation, 39-the 3rd black water, the dense medium of 40-, 41-the second black water, 43-qualified medium bucket, 45-magnetite powder, 46-spoil, 47-slurry circulating system, 48-the 4th fine cleaned coal, the 3rd block of cleaned coal of 49-.
Detailed description of the invention
Below in conjunction with embodiment, taking production scale as the coal preparation plant of 2,000,000 tons/year is as example, the present invention is further described in detail, the equipment of selecting in illustrated embodiment and embodiment and method of operating thereof are only for explaining the present invention, be not intended to limit scope of the present invention, those skilled in the art can adopt other equipment with or close function identical with following equipment to implement the present invention.
As shown in Figure 1, adopt 1 graded desliming banana screen (model is WZDS-30 × 73) that raw coal (1) is carried out to graded desliming (3), simultaneously with 90m
3the amount of/h adds recirculated water (2), to strengthen graded desliming effect, obtains lump coal (5), the first smalls (4) and the first black water (6);
Adopt 1 dense-medium shallow-tank separator (model is MZC1048) that lump coal (5) is carried out to lump coal dense medium separation (11), obtain first block of cleaned coal (13) and piece spoil (14);
Adopt 1 desliming banana (model is WZDS-30 × 61) sieve that the first smalls (4) is carried out to desliming (6), simultaneously with 129m
3the amount of/h adds recirculated water (7), to strengthen desliming effect, obtains the second smalls (9) and coal slime (10), and the second smalls (9) enters mixing tank (12); Then adopt 1 heavy medium cyclone (model is FZJ850) that the second smalls (9) is carried out to smalls dense medium separation (15), obtain the first fine cleaned coal (17) and the first last spoil (16);
Adopt gravity flow screen that first block of cleaned coal (13) carried out to a de-mediated (20), obtain second block of cleaned coal (22) and the first qualified medium (21); Adopt 1 sieve bend (model is HFK2100) that the first fine cleaned coal (17) is carried out to a de-mediated (19), obtain the second fine cleaned coal (26) and the second qualified medium (25); Adopt 1 sieve bend (model is OSB1500) that the first last spoil (16) is carried out to a de-mediated (18), obtain the second last spoil (23) and the 4th qualified medium (24);
Merge second block of cleaned coal (22) and the second fine cleaned coal (26), adopt 1 cleaned coal vibration de-mediated classifying screen (model is WZK-30 × 73, sieve aperture 1mm, 25mm) to be carried out secondary de-mediated classification (32), simultaneously with 266m
3the amount of/h adds recirculated water (31), to strengthen secondary de-mediated grading effect, obtains the 3rd block of cleaned coal of oversize (49), screenings the 3rd fine cleaned coal (35), the 3rd qualified medium (33) and first rare medium (34); Adopt 1 Horizontal centrifugal dehydrator (model is HM-1400) that the 3rd fine cleaned coal (35) is carried out to centrifugal dehydration (37), obtain the 4th fine cleaned coal (48) and the second black water (41);
Merge piece spoil (14) and the second last spoil (23), adopt 1 spoil vibration sculping screen (model is WZK-20 × 52, and sieve seam is 1mm) to be carried out secondary de-mediated (28), simultaneously with 73m
3the amount of/h adds recirculated water (27), to strengthen secondary de-medium effectiveness, obtains spoil (46), second rare medium (29) and the 5th qualified medium (30);
The first qualified medium (21) is entered to the qualified medium bucket (43) that diameter is 4.5m, and the second qualified medium (29), the 4th qualified medium (24) and the 5th qualified medium (30) enter the mixing tank that diameter is 4.0m (12); Adopt 1 current divider box that the 3rd qualified medium (33) is shunted, part shunting enters qualified medium bucket (43), part shunting merges with first rare medium (34) and second rare medium (29), adopt 4 wet magnetic separators (model is 914 × 2972LH) to be carried out magnetic separation (38), obtain the 3rd black water (39) and dense medium (40), wherein dense medium (40) enters qualified medium bucket (43) and mixing tank (12) after 1 current divider box shunting;
In qualified medium bucket (43), add magnetite powder (45) and add recirculated water (44) with the amount of 0.54t/h with the amount of 0.32t/h, in mixing tank (12), add magnetite powder (45) and add recirculated water (44) to guarantee there is all the time material in qualified medium bucket (43) and mixing tank (12) with the amount of 0.7t/h with the amount of 0.24t/h, the qualified medium in qualified medium bucket (43) is fed to lump coal dense medium separation (11);
The first black water (6), the second black water (41), the 3rd black water (39) and coal slime (10) are entered to slurry circulating system (47).
Although the present invention is described in detail; but should be appreciated that foregoing description is not in order to limit the present invention, without departing from the spirit and scope of the present invention; any amendment of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
Claims (12)
1. the shared coal preparation method of lump coal and smalls dense media recovery system, the method comprises the following steps:
A) raw coal is carried out to graded desliming, obtain lump coal, the first smalls and the first black water;
B
1) lump coal that step is obtained in a) carries out lump coal dense medium separation, obtains first block of cleaned coal and piece spoil;
B
2) the first smalls that step is obtained in a) carries out desliming, obtains the second smalls and coal slime; Gained the second smalls enters mixing tank, carries out smalls dense medium separation, obtains the first fine cleaned coal and the first last spoil;
C
1) by step b
1) in first block of cleaned coal obtaining carry out a de-mediated, obtain second block of cleaned coal and the first qualified medium;
C
2) by step b
2) in the first fine cleaned coal of obtaining carry out a de-mediated, obtain the second fine cleaned coal and the second qualified medium;
D) by step c
1) in the second block of cleaned coal and the step c that obtain
2) in obtain second fine cleaned coal merge, carry out secondary de-mediated classification, obtain the 3rd block of cleaned coal, the 3rd fine cleaned coal, the 3rd qualified medium and first rare medium;
E) by steps d) in the 3rd fine cleaned coal that obtains carry out centrifugal dehydration, obtain the 4th fine cleaned coal and the second black water.
2. method according to claim 1, is characterized in that, described method also comprises step f): the first last spoil is carried out to a de-mediated, obtain the second last spoil and the 4th qualified medium.
3. method according to claim 2, is characterized in that, described method also comprises step g): piece spoil and the second last spoil are merged, carry out secondary de-mediated, obtain spoil, second rare medium and the 5th qualified medium.
4. method according to claim 3, is characterized in that, described method also comprises step h): the first qualified medium enters qualified medium bucket, and the second qualified medium, the 4th qualified medium and the 5th qualified medium enter mixing tank.
5. method according to claim 3, is characterized in that, described method also comprises step I): the 3rd qualified medium is shunted, part shunting enters qualified medium bucket, part shunting merges with first rare medium and second rare medium, carries out magnetic separation, obtains the 3rd black water and dense medium.
6. method according to claim 5, is characterized in that, described method also comprises step: by step I) in the described dense medium that obtains after shunting, enter qualified medium bucket and mixing tank.
7. method according to claim 5, is characterized in that, described method also comprises step j): described the first black water, the second black water, the 3rd black water and coal slime are entered to slurry circulating system.
8. according to the method described in any one in claim 4 to 7, it is characterized in that, described method also comprises step k): the qualified medium in described qualified medium bucket is fed to lump coal dense medium separation.
9. according to the method described in any one in claim 4 to 7, it is characterized in that, described method also comprises step l): in described qualified medium bucket, add magnetite powder and recirculated water.
10. according to the method described in any one in claim 4 to 7, it is characterized in that, described method also comprises step m): in described mixing tank, add magnetite powder and recirculated water.
11. according to the method described in any one in claim 4 to 7, it is characterized in that, described method also comprises step n): to step g) described in secondary de-mediated classification step in add recirculated water.
12. according to the method described in any one in claim 1 to 7, it is characterized in that, described method also comprises step o): graded desliming step, the step b described in a) to step
2) described in desliming step and/or steps d) add recirculated water in described secondary de-mediated classification step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310240813.3A CN103341398B (en) | 2013-06-18 | 2013-06-18 | Coal separation method in which lump coal and fine coal dense media share same recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310240813.3A CN103341398B (en) | 2013-06-18 | 2013-06-18 | Coal separation method in which lump coal and fine coal dense media share same recovery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103341398A CN103341398A (en) | 2013-10-09 |
| CN103341398B true CN103341398B (en) | 2014-10-29 |
Family
ID=49276247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310240813.3A Expired - Fee Related CN103341398B (en) | 2013-06-18 | 2013-06-18 | Coal separation method in which lump coal and fine coal dense media share same recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103341398B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104069939A (en) * | 2014-06-27 | 2014-10-01 | 内蒙古伊泰煤炭股份有限公司 | Fine coal sorting method |
| CN105855066B (en) * | 2016-02-25 | 2018-08-24 | 徐浩军 | A kind of flotation medium recovery system |
| CN109999991A (en) * | 2019-03-28 | 2019-07-12 | 通用技术集团工程设计有限公司 | A kind of thermal coal dense medium sorting process effectively reducing slime content |
| CN112371325A (en) * | 2020-09-21 | 2021-02-19 | 新汶矿业集团有限责任公司洗煤分公司 | Power coal grading washing process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5794791A (en) * | 1987-11-30 | 1998-08-18 | Genesis Research Corporation | Coal cleaning process |
| CN1424151A (en) * | 2002-12-31 | 2003-06-18 | 天地科技股份有限公司唐山分公司 | Process for heavy media separation of coarse coal slurry |
| CN102211087A (en) * | 2011-05-23 | 2011-10-12 | 中矿绿能(北京)工程技术有限公司 | Air and heavy medium dry coal preparation process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2008299561B2 (en) * | 2007-09-10 | 2014-02-13 | Global Coal Solutions Pty Ltd | Beneficiation of coal |
-
2013
- 2013-06-18 CN CN201310240813.3A patent/CN103341398B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5794791A (en) * | 1987-11-30 | 1998-08-18 | Genesis Research Corporation | Coal cleaning process |
| CN1424151A (en) * | 2002-12-31 | 2003-06-18 | 天地科技股份有限公司唐山分公司 | Process for heavy media separation of coarse coal slurry |
| CN102211087A (en) * | 2011-05-23 | 2011-10-12 | 中矿绿能(北京)工程技术有限公司 | Air and heavy medium dry coal preparation process |
Non-Patent Citations (4)
| Title |
|---|
| 3NZX型重介质旋流器在中马村选煤厂的应用;焦红光等;《煤炭加工与综合利用》;20071231(第3期);第7-9页 * |
| 付银香.重介质旋流器分选无烟煤工艺在天地王坡煤业公司选煤厂中的应用.《选煤技术》.2008,(第1期), |
| 焦红光等.3NZX型重介质旋流器在中马村选煤厂的应用.《煤炭加工与综合利用》.2007,(第3期), |
| 重介质旋流器分选无烟煤工艺在天地王坡煤业公司选煤厂中的应用;付银香;《选煤技术》;20080229(第1期);第37-39页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103341398A (en) | 2013-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102211054B (en) | Process for sorting coarse coal slime by utilizing heavy medium liquid-solid fluidized bed | |
| CN108212506B (en) | A kind of magnetic-is red-the classification pre-selection of water chestnut compound iron ore, fine New Method for Sorting | |
| CN103341398B (en) | Coal separation method in which lump coal and fine coal dense media share same recovery system | |
| CN207521145U (en) | Coal synthesis sorting assembly line | |
| CN109331987A (en) | A kind of coal measures intergrowth mineral produces resource wholegrain grade dry separation cleaning technology and system | |
| CN105080701B (en) | One kind interference selected difficulty of bed roughing Slime dense medium cyclone selects separation of coarse slime method | |
| CN101664715A (en) | Ore-dressing technique capable of effectively improving comprehensive utilization rate of mine resources | |
| CN102847606A (en) | Coarse slime separation process | |
| CN105597914B (en) | A kind of dense media disturbs bed separation of coarse slime system | |
| CN106607183A (en) | Modular high density coal system oil shale quality promoting technology and quality promoting system | |
| CN104624407B (en) | Two sections of cyclone open circuit flow production powdered concentrated phosphate equipment | |
| CN202725309U (en) | Coarse slime separation system | |
| CN111167594B (en) | Constant-low shunt-based non-pressure three-product and coal slime dense-medium separation improved process | |
| CN109201354A (en) | MAGNETIC HYDROCYCLONES, magnetic reconnection conjunction separation system and the magnetic reconnection selected for weak magnetic mineral closes the method sorted | |
| CN104492615A (en) | Grinding classification method | |
| CN107020200B (en) | Blending process of flotation clean coal in full-grain clean coal | |
| CN204194144U (en) | Thick floatation equipment is cut based on entering the pre-current stabilization of floating ore pulp | |
| CN105964392A (en) | Coal dressing and desliming system | |
| CN209997781U (en) | Coarse coal slime dense medium sorting system | |
| CN110170370B (en) | System and process for reducing lower limit of gravity separation granularity of dense medium coal preparation plant | |
| Deurbrouck et al. | Performance characteristics of coal-washing equipment: dense-medium cyclones | |
| CN210449500U (en) | Coal dressing and desliming system for coal slime reseparation | |
| CN103433121B (en) | Dense-medium and low-density separation process | |
| CN209156147U (en) | The MAGNETIC HYDROCYCLONES selected for weak magnetic mineral and magnetic reconnection close separation system | |
| Ramsaywok et al. | Case study: High capacity spiral concentrators |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANDI SCIENCE + TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: WANG CHENGJIANG Effective date: 20141010 Free format text: FORMER OWNER: CHEN HUI TANG LIGANG Effective date: 20141010 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100029 CHAOYANG, BEIJING TO: 100013 CHAOYANG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20141010 Address after: 100013 Heping Street, Heping Street, Beijing, Chaoyang District, No. 5 Patentee after: Tiandi Science & Technology Co., Ltd. Address before: 100029, Beijing, Chaoyang District stability outside the door to win the ancient home building No. 2, 1303 Patentee before: Wang Chengjiang Patentee before: Chen Hui Patentee before: Tang Ligang |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20180618 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |