CN104624410A - Method for adjusting separation density of dense medium cyclone - Google Patents
Method for adjusting separation density of dense medium cyclone Download PDFInfo
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- CN104624410A CN104624410A CN201510027118.8A CN201510027118A CN104624410A CN 104624410 A CN104624410 A CN 104624410A CN 201510027118 A CN201510027118 A CN 201510027118A CN 104624410 A CN104624410 A CN 104624410A
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Abstract
The invention discloses a method for adjusting separation density of a dense medium cyclone and belongs to the technical field of magnetic separation. The method comprises the following steps: setting a radical magnetic field in a cyclone, and performing complex stacking on a magnetic force and forces such as a centrifugal force, a buoyancy force, a gravitational force and a fluid drag force to modify migration and enrichment regularities of magnetic particles, so as to realize re-distribution of the magnetic particles in the cyclone. The method is simple in process, high in operability, applicable to separators with radial outlets and wide in application range.
Description
Technical field
The present invention relates to a kind of method regulating dual medium cyclone dressing density, belong to magnetic separation technique field.
Background technology
At present, along with the development of magnetic field technique, various magnetic force compound coal separation preparation equipment also arises at the historic moment, as column magnetic separator, magnetic force jigging machine, and magnetic heavy-duty machine etc.Magnetic mineral detached job or with magnetic-particle be other mineral of dense medium separation operation in, use magnetic field force and buoyancy, gravity, fluid drag, the superposition of centrifugal force etc., treat the accumulation of sorting material, dispersion, skew under realizing compound force field, thus realize classification or separation operation object.In coal preparation technique, dense medium cyclone is wide with its selected grade, and treating capacity is large, is suitable for the choosing of sorting difficulty and pole difficult separation coal and is used widely.For the adjustment of dual medium cyclone dressing situation, still main based on change structure parameter and operating condition at present: when coal varitation, coal preparation plant generally adjusts separating density by change underflow opening and overflow pipe size, due to the particularity of coal separation shopwork condition, overflow pipe insertion depth adjusting device is often difficult to adjustment because coal slime is blocked; Change underflow opening and need again the parking that stops production, not only cause detract equipment life, also easily cause pipeline blockage, and can not steplessly adjust, especially when raw coal character consecutive variations, adjustment is got up more at a loss what to do.Therefore, how to realize three-product HM cyclone separating density, especially the online regulation and control of two sections of density, be still China's coal separation industry of a specified duration and unsettled a technical difficult problem.At present, as other magnetic force devices, superposed in magnetic field with the eddy flow field of force, rarely have report to realize the adjustment of dual medium cyclone dressing effect under magneticaction, if can adjust with complementary field, above problem just can be readily solved.
Summary of the invention
The present invention aims to provide a kind of method regulating dual medium cyclone dressing density, by by magnetic field force and centrifugal force, the complex superposition effect of the power such as buoyancy, gravity, fluid drag, changes migration and the enrichment discipline of magnetic-particle, and then realizes magnetic-particle distributing again in cyclone.By changing relative position and the magnetic field intensity of magnetic system and cyclone, online step-less adjustment dual medium cyclone dressing density can be realized.
The invention provides a kind of method regulating dual medium cyclone dressing density, radial magnetic field is set in cyclone, by regulating magnetic system to arrange and magnetic field intensity, regulating the sorting situation of cyclone.
In such scheme, described magnetic system each magnetic pole N-S pole is alternately evenly arranged at cyclone periphery, according to sorting requirement, by processing and fabricating adjusting device or manually deploy to ensure effective monitoring and control of illegal activities, magnetic system is fixed on cyclone cone section or underflow opening position, carries out the adjustment of separating effect.
Further, described magnetic pole is electromagnet or permanent magnet.
In such scheme, described magnetic system method for arranging is: magnetic pole is evenly arranged along cyclone cone segments or underflow opening cross section, and N pole and S pole are alternately placed, and implementation method is: adjacent electromagnet is under the consistent prerequisite of coil direction of winding, and exciting current is contrary; Under the prerequisite that exciting current direction is consistent, adjacent pole direction of winding is contrary.Further, described magnetic pole position is: when needing to reduce separating density, is arranged on by magnetic pole bottom cyclone cone section; When needing to promote separating density, magnetic pole is arranged on cyclone underflow opening passage.
In such scheme, the regulative mode of described magnetic field intensity is: when magnetic pole adopts electromagnet, carry out the adjustment of magnetic field intensity by changing exciting current size; When magnetic pole adopts permanent magnet, by changing magnetize intensity or the change magnet superposition number adjustment magnetic field intensity of single magnet.
In such scheme, described magnetic system pole number is 2N, and wherein N gets 2,3,4 or 5, and for ensureing that each magnetic pole can stablize placement, N is no more than 5.
In such scheme, the adjusting device of described processing and fabricating and cyclone cone segments and underflow opening manufactured materials are the not non-magnet_conductible material such as magnetic stainless steel, nylon or polyurethane; Core material is the high permeability materials such as electrical sheet, soft iron, and iron-core coil is evenly close around forming by copper enamel-covered wire.
Described adjusting device comprises adjustment vertical rod, each magnetic pole is fixed by regulating vertical rod, the structure of adjustment vertical rod is: comprise vertical bar and height regulating rod, vertical bar is vertical with base to be arranged, and vertically bar can slide in the horizontal direction along the horizontal slide on base, fixes magnetic system horizontal level after determining position by the first bolt; It is inner that height regulating rod is enclosed within vertical bar, and height regulating rod also slides along height slip cableway in short transverse, fixes magnetic system vertical position after determining position by the second bolt; Dwang is fixed by the upper end of the 3rd bolt and height regulating rod, and dwang can rotate along the 3rd bolt, and angle determines rear fixing magnetic system angle position.The other end of dwang fixes one piece of magnetic pole, and dwang can do 0 ~ 90 ° of rotation along the 3rd bolt, thus regulates the position of magnetic pole.
The method of above-mentioned adjustment dual medium cyclone dressing density, comprises the following steps:
(1) during cyclone initialization or when cyclone separation index is normal, without the need to regulating device;
(2) when separating density is high, product chemical examination ash content is when exceeding standard, and adjustment magnetic system is fixing to cyclone cone hypomere, and magnetic pole and cyclone are bored wall and be 90 ° and vertically place; The reduction to separating density can be realized by adjustment magnetic pole thickness or exciting current change magnetic field intensity; If separation index can not be realized ideal in magnetic field intensity adjustable range, finely tune magnetic system position up and down, repeat above step, until obtain qualified products;
(3) when separating density is low, product chemical examination ash content is low, and when waste pack coal amount is large, adjustment magnetic system is fixing to cyclone underflow opening, and magnetic pole and underflow opening limit wall are 90 ° and vertically place; Adjustment magnetic pole thickness, magnetic pole logarithm or exciting current size change magnetic field intensity, realize the lifting of separating density, until obtain qualified products.According to said method with step, can Reasonable adjustment cyclone operating mode.
Utilize the inventive method, only need require by the adjustment to magnetic system position and magnetic field intensity according to sorting process, the adjustment to separation index can be realized.Not only greatly alleviate the working strength of operating personnel, also provide a kind of effective regulate and control method for stepless on-line control cyclone operating mode, compared with additive method, the present invention has the following advantages:
(1) magnetic system preparation method is simple, easily implements, and preparation speed is fast, and price is low;
(2) method of adjustment is simple, successful, only can need be achieved the goal by adjustment magnetic system position and magnetic field intensity according to product requirement, and the stopping production avoiding replacing underflow opening to bring is stopped, and greatly reduces staff labor intensity;
(3) this method technique is simple, workable, is applicable to the separator with axially outlet, has wide range of applications.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that electromagnet of the present invention is arranged in bottom cyclone cone section.
Fig. 2 is the schematic diagram that electromagnet of the present invention is arranged in cyclone underflow opening.
Fig. 3 is that each magnetic pole regulates vertical rod structural representation.
Fig. 4 is the profile along A-A line in Fig. 3.
In figure: 1-cyclone cone segments, 2-cyclone underflow opening, 3-magnetic pole, 4-the 3rd bolt, 5-height regulating rod, the vertical bar of 6-, 7-horizontal slide, 8-base, 9-first bolt, the vertical slideway of 10-, 11-second bolt, 12-dwang.
P1-tapering magnet places signal, and P2-underflow opening magnet places signal.
Detailed description of the invention
Further illustrate the present invention below by embodiment and accompanying drawing, but be not limited to following examples.
Embodiment:
A kind of method regulating dual medium cyclone dressing density that the present embodiment provides is by arranging radial magnetic field in cyclone, by regulating magnetic system to arrange and magnetic field intensity, regulates the sorting situation of cyclone.Concrete technology is operating as: described magnetic system each magnetic pole N-S pole is alternately evenly arranged at cyclone periphery, according to sorting requirement, by processing and fabricating adjusting device or manually deploy to ensure effective monitoring and control of illegal activities, magnetic system is fixed on cyclone cone section or underflow opening position, carries out the adjustment of separating effect.Further, described magnetic pole is electromagnet or permanent magnet.
The magnetic system method for arranging required is: magnetic pole is evenly arranged along cyclone cone segments or underflow opening cross section, and N pole and S pole are alternately placed, and implementation method is: adjacent electromagnet is under the consistent prerequisite of coil direction of winding, and exciting current is contrary; Under the prerequisite that exciting current direction is consistent, adjacent pole direction of winding is contrary.
Concrete magnetic pole position is: when needing to reduce separating density, is arranged on by magnetic pole bottom cyclone cone section; When needing to promote separating density, magnetic pole is arranged on cyclone underflow opening passage.
Schematic diagram is placed, for 4 magnetic poles as Fig. 1,2 shows magnetic system position.
Fig. 1 is the schematic diagram that electromagnet of the present invention is arranged in bottom cyclone cone section.Magnetic pole 3 is evenly arranged along cyclone cone segments 1 cross section, and N pole and S pole are alternately placed, and implementation method is: adjacent electromagnet is under the consistent prerequisite of coil direction of winding, and exciting current is contrary; Under the prerequisite that exciting current direction is consistent, adjacent pole direction of winding is contrary.
Fig. 2 is the schematic diagram that electromagnet of the present invention is arranged in cyclone underflow opening.Magnetic pole 3 is evenly arranged along cyclone underflow opening 2 cross section, and N pole and S pole are alternately placed, and implementation method is: adjacent electromagnet is under the consistent prerequisite of coil direction of winding, and exciting current is contrary; Under the prerequisite that exciting current direction is consistent, adjacent pole direction of winding is contrary.
Magnetic system in the present invention is by adjusting device or manually deploy to ensure effective monitoring and control of illegal activities, and described adjusting device comprises adjustment vertical rod, and each magnetic pole is fixed by regulating vertical rod.As shown in Figure 3, Figure 4, the structure of adjustment vertical rod is: comprise vertical bar 6 and height regulating rod 5, vertical bar 6 is vertical with base 8 to be arranged, and vertically bar 6 can slide in the horizontal direction along the horizontal slide 7 on base 8, fixes magnetic system horizontal level after determining position by the first bolt 9; It is inner that height regulating rod 5 is enclosed within vertical bar 6, and height regulating rod 5 also slides along vertical slideway 10 at vertical direction, fixes magnetic system vertical position after determining position by the second bolt 11; Dwang 12 is fixed with the upper end of height regulating rod 5 by the 3rd bolt 4, and dwang 12 can rotate along the 3rd bolt 4, and the other end of dwang 12 fixes one piece of magnetic pole.
Regulate magnetic pole and cyclone cone segments or underflow opening outer wall corresponding angle, angle fixes the 3rd bolt 4 after determining; Level, highly, rotate Three Degree Of Freedom and coordinate adjustment, magnetic can be realized and tie up to freely adjusting of cone and underflow opening.After magnetic system position is fixing, requires to regulate magnetic field intensity according to sorting process, carry out technique adjustment.In Fig. 4, dwang can around the 3rd screws 0-90 °.
Each pole pair answers one to regulate vertical rod, and adjusting device regulates vertical rod to assemble by 2N.
When magnetic pole adopts electromagnet, carry out the adjustment of magnetic field intensity by changing exciting current size; When magnetic pole adopts permanent magnet
Time, by changing magnetize intensity or the change magnet superposition number adjustment magnetic field intensity of single magnet.
Magnetic system of the present invention pole number is 2N, and wherein N gets 2,3,4 or 5, and for ensureing that each magnetic pole can stablize placement, N is no more than 5.
In such scheme, described adjusting device and cyclone cone segments and underflow opening manufactured materials are not magnetic stainless steel, nylon or polyurethane; Core material is electrical sheet or soft iron, and iron-core coil is evenly close around forming by copper enamel-covered wire.
For place with good conditionsi, the automatic control to magnetic system position and exciting current size all can be realized.
When separating density height, adjustment magnetic system, to cyclone cone hypomere, can realize the reduction to separating density by adjustment magnetic pole thickness or exciting current change magnetic field intensity.If separation index can not be realized ideal in magnetic field intensity adjustable range, again finely tune magnetic system position, repeat above step, until obtain qualified products.When separating density is low, adjustment magnetic system is also fixing to cyclone underflow opening.Adjustment magnetic pole thickness, magnetic pole logarithm or exciting current size change magnetic field intensity, realize the lifting of separating density, until obtain qualified products.
The present embodiment regulates the method for dual medium cyclone dressing density, comprises the following steps:
(1) during cyclone initialization or when cyclone separation index is normal, without the need to regulating device;
(2) when separating density is high, product chemical examination ash content is when exceeding standard, and adjustment magnetic system is fixing to cyclone cone hypomere, and magnetic pole and cyclone are bored wall and be 90 ° and vertically place; The reduction to separating density can be realized by adjustment magnetic pole thickness or exciting current change magnetic field intensity; If separation index can not be realized ideal in magnetic field intensity adjustable range, again finely tune magnetic system position, repeat above step, until obtain qualified products;
(3) when separating density is low, product chemical examination ash content is low, and when waste pack coal amount is large, adjustment magnetic system is fixing to cyclone underflow opening, and magnetic pole and underflow opening limit wall are 90 ° and vertically place; Adjustment magnetic pole thickness, magnetic pole logarithm or exciting current size change magnetic field intensity, realize the lifting of separating density, until obtain qualified products.
Claims (9)
1. regulating a method for dual medium cyclone dressing density, it is characterized in that: radial magnetic field is set in cyclone, by regulating magnetic system to arrange and magnetic field intensity, regulating the sorting situation of cyclone.
2. the method for adjustment dual medium cyclone dressing density according to claim 1, it is characterized in that: described magnetic system each magnetic pole N-S pole is alternately evenly arranged at cyclone periphery, according to sorting requirement, by processing and fabricating adjusting device or manually deploy to ensure effective monitoring and control of illegal activities, magnetic system is fixed on cyclone cone section or underflow opening position, carries out the adjustment of separating effect.
3. the method for adjustment dual medium cyclone dressing density according to claim 2, is characterized in that: described magnetic pole is electromagnet or permanent magnet.
4. the method for adjustment dual medium cyclone dressing density according to claim 1, it is characterized in that: described magnetic system method for arranging is: magnetic pole is evenly arranged along cyclone cone segments or underflow opening cross section, N pole and S pole are alternately placed, implementation method is: adjacent electromagnet is under the consistent prerequisite of coil direction of winding, and exciting current is contrary; Under the prerequisite that exciting current direction is consistent, adjacent pole direction of winding is contrary.
5. the method for adjustment dual medium cyclone dressing density according to claim 4, is characterized in that: described magnetic pole position is: when needing to reduce separating density, is arranged on by magnetic pole bottom cyclone cone section; When needing to promote separating density, magnetic pole is arranged on cyclone underflow opening passage.
6. the method for adjustment dual medium cyclone dressing density according to claim 1, is characterized in that: the regulative mode of described magnetic field intensity is: when magnetic pole adopts electromagnet, carry out the adjustment of magnetic field intensity by changing exciting current size; When magnetic pole adopts permanent magnet, by changing magnetize intensity or the change magnet superposition number adjustment magnetic field intensity of single magnet.
7. the method for adjustment dual medium cyclone dressing density according to claim 1, is characterized in that: described magnetic system pole number is 2N, and wherein N gets 2,3,4 or 5.
8. the method for adjustment dual medium cyclone dressing density according to claim 1, is characterized in that: described adjusting device and cyclone cone segments and underflow opening manufactured materials are not magnetic stainless steel, nylon or polyurethane; Core material is electrical sheet or soft iron, and iron-core coil is evenly close around forming by copper enamel-covered wire.
9. the method for adjustment dual medium cyclone dressing density according to claim 1, is characterized in that: comprise the following steps:
(1) during cyclone initialization or when cyclone separation index is normal, without the need to regulating device;
(2) when separating density is high, product chemical examination ash content is when exceeding standard, and adjustment magnetic system is fixing to cyclone cone hypomere, and magnetic pole and cyclone are bored wall and be 90 ° and vertically place; The reduction to separating density can be realized by adjustment magnetic pole thickness or exciting current change magnetic field intensity; If separation index can not be realized ideal in magnetic field intensity adjustable range, again finely tune magnetic system position, repeat above step, until obtain qualified products;
(3) when separating density is low, product chemical examination ash content is low, and when waste pack coal amount is large, adjustment magnetic system is fixing to cyclone underflow opening, and magnetic pole and underflow opening limit wall are 90 ° and vertically place; Adjustment magnetic pole thickness, magnetic pole logarithm or exciting current size change magnetic field intensity, realize the lifting of separating density, until obtain qualified products.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510027118.8A CN104624410B (en) | 2015-01-20 | 2015-01-20 | A kind of method for adjusting dual medium cyclone dressing density |
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| CN201510027118.8A CN104624410B (en) | 2015-01-20 | 2015-01-20 | A kind of method for adjusting dual medium cyclone dressing density |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108284003A (en) * | 2018-01-22 | 2018-07-17 | 太原理工大学 | A kind of device and method reducing cyclone separating density |
| CN109092577A (en) * | 2018-07-20 | 2018-12-28 | 太原理工大学 | A method of reducing dual medium cyclone dressing technique Jie's consumption indirectly using external magnetic field |
| CN109201354A (en) * | 2018-11-06 | 2019-01-15 | 中南大学 | MAGNETIC HYDROCYCLONES, magnetic reconnection conjunction separation system and the magnetic reconnection selected for weak magnetic mineral closes the method sorted |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108284003A (en) * | 2018-01-22 | 2018-07-17 | 太原理工大学 | A kind of device and method reducing cyclone separating density |
| CN108284003B (en) * | 2018-01-22 | 2020-02-28 | 太原理工大学 | Device and method for reducing sorting density of cyclone |
| CN109092577A (en) * | 2018-07-20 | 2018-12-28 | 太原理工大学 | A method of reducing dual medium cyclone dressing technique Jie's consumption indirectly using external magnetic field |
| CN109201354A (en) * | 2018-11-06 | 2019-01-15 | 中南大学 | MAGNETIC HYDROCYCLONES, magnetic reconnection conjunction separation system and the magnetic reconnection selected for weak magnetic mineral closes the method sorted |
| CN109201354B (en) * | 2018-11-06 | 2023-10-31 | 中南大学 | Magnetic hydrocyclone, combined magnetic-gravity separation system and combined magnetic-gravity separation method for weakly magnetic mineral concentration |
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