CN105478353B - A kind of sieve bottom of Bar strip type coal dust vibration sieve - Google Patents
A kind of sieve bottom of Bar strip type coal dust vibration sieve Download PDFInfo
- Publication number
- CN105478353B CN105478353B CN201610008294.1A CN201610008294A CN105478353B CN 105478353 B CN105478353 B CN 105478353B CN 201610008294 A CN201610008294 A CN 201610008294A CN 105478353 B CN105478353 B CN 105478353B
- Authority
- CN
- China
- Prior art keywords
- sieve
- coal dust
- bar strip
- coal
- strip type
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
Abstract
The invention discloses a kind of sieve bottoms of Bar strip type coal dust vibration sieve, the sieve bottom includes several layers screening group, any layer screening group in the several layers screening group includes Bar strip type sieve (17) and U-shaped square hole type sieve (18), and sealing strip (19) are arranged between Bar strip type sieve (17) and U-shaped square hole type sieve (18) and are fixed together by fixing piece (20).Sieve bottom of the invention can effectively intercept various sundries, be not easy to shake broken, improve quality of pc.
Description
Technical field
The invention belongs to granular coal injection technical fields, in particular it relates to a kind of sieve bottom of Bar strip type coal dust vibration sieve.
Background technique
Pulverized coal injection in blast furnace is the anchracite duff for being directly blown levigate into furnace from blast-furnace tuyere or bituminous coal powder or two
The mixed coal powder of person.It is played in blast furnace ironmaking process to pulverized coal injection in blast furnace with substitute for coke and the work of heat and reducing agent is provided
With, so that coke ratio is reduced, reduction pig iron cost, it may be said that pulverized coal injection is the important technical revolution that modern blast furnace is smelted.
There is two class technology of pulverized coal injection and granular coal injection by coal powder size division.The development of pulverized coal injection technology is more early, and compares into
It is ripe；Granular coal injection technology is just to have obtained rapidly developing application in recent years on the part blast furnace of the states such as English, method, Sweden.For example,
Britain's steel connection No. 4 blast furnaces of Scunthorpe United Victorea just use granular coal injection technology, and coal ratio reaches 201kg/t, reaches generation
Boundary's advanced level.
At home or even Asia region, up to the present only Laigang uses granular coal injection technology.The beans process system
It is gone into operation in 2005, is 2 × 1880m3Pulverized coal injection.Beans flouring technology prepares coal dust using hammer mill.What it was prepared
Coal powder size characteristic distributions are to account for 100% less than 5mm, reach 95% less than 2mm, are less than 0.074mm (i.e. 200 meshes) and only account for
25% or so, average particle size is 0.55mm~0.65mm.The raw coal that beans pulverized coal preparation system process flow prepares as shown in Figure 1: is logical
It crosses feeder belt 3 and enters hammer mill 2 from top, under the draft effect of main induced draft fan 12, the burning of combustion gas furnace 1 is generated
Dry gas, which enters hammer mill, dries raw coal, and raw coal is ground coal-forming under the collective effect for hammering and drying
Powder；Dry gas carries coal dust and successively enters cyclone separator 4 by hammer crushing motor spindle under main induced draft fan draft effect
With cloth bag collection machine 11；The coal dust that cyclone separator and cloth bag collection machine are collected passes through butterfly valve 5,1# unloading valve 6 and 2# respectively and unloads
Grey valve 9, screw conveyor 10 reach 1# coal dust vibration sieve 7 and 2# coal dust vibration sieve 8, are entered by the qualified coal dust (screenings) of screening
The underproof material such as pulverized coal bin, sundries and bulky grain (oversize) enters outlet after powder-returning funnel；It is isolated through cloth bag collection machine
The exhaust gas come is discharged into atmosphere by the chimney that main induced draft fan exports.
Production for many years is practice have shown that two big main problems of beans pulverized coal preparation system are exactly that pipe wear and blast furnace block up rifle, and
It is determined by the Processes and apparatus feature of its beans pulverized coal preparation system.Wherein blast furnace block up rifle then with quality of pc is unstable greatest pass
System, problem then screening plant of the outstanding behaviours in beans powder collecting system.Hammer mill " going out under above entering " goes out powder mode, determines
Its ability for not having compared with medium-speed pulverizer (the coal-grinding equipment of fine coal pulverized coal preparation system) processing separating sundries, so into
All sundries in the raw coal of pulverized coal preparation system, which will shake to sieve by coal dust, carries out screening process.Beans powder collecting system uses Bar strip type
Coal dust vibration sieve, structure is as shown in Fig. 2, coal dust enters coal dust vibration sieve from coal powder entrance 13, by vibration to coal on sieve bottom 15
Powder is sieved.
The coal dust vibration sieve using sieve bottom be Bar strip type sieve, be made of altogether upper, middle and lower three pieces, rod gap 2.5mm~
Between 3.0mm.Its structure is as shown in figure 3, use the flange bolt and upper sieve nest 14, the installation fixation of lower sieve nest 16 in surrounding.
Above-mentioned sieve bottom rod diameter is between 2.5mm~3.0mm, and quality of pc is relatively stable under normal circumstances, from blast furnace
Stifled rifle index judges that normal every shift blocks up rifle number at 20 times or so.But it is also frequently present of following problem: sundries in use
Perhaps bulky grain card squeezes between rod or rod warps under vibration and coal dust percussion and deflection, or
There is the case where fatigue fracture in rod, these can all make to sieve on bottom several times of gap enlargement of adjacent rod, so as to cause sundries,
The oversizes such as bulky grain enter under sieve, while the sundries of sheet or fine strip shape is inherently easier through rod gap, from
And quality of pc is seriously affected, cause blast furnace the production accident of large area spray gun blocking occur.
Continuous improvement with blast furnace to coal injection quality requirement, it is necessary to the sundries that is further reduced in coal dust and big
Particle, to improve and stablize the quality of coal dust, it is ensured that the continuous-stable of pulverized coal injection.Therefore, beans system coal dust matter is promoted
Can amount just sustainable development and a continuous key link promoting at the set technique.
Summary of the invention
The object of the present invention is to provide a kind of sieve bottoms of Bar strip type coal dust vibration sieve, which can effectively intercept various miscellaneous
Object is not easy to shake broken, improves quality of pc.
In order to achieve the above objectives, present invention employs the following technical solutions:
A kind of sieve bottom of Bar strip type coal dust vibration sieve, the sieve bottom includes several layers screening group, in the several layers screening group
Any layer screening group include Bar strip type sieve 17 and U-shaped square hole type sieve 18, Bar strip type sieve 17 and U-shaped square hole type sieve 18
Between sealing strip 19 be set and be fixed together by fixing piece 20.
Preferably, the number of plies of the several layers screening group is three layers, respectively upper layer, middle layer, lower layer.The technology of the present invention people
Member can also select other numbers of plies to be arranged as needed.
Sealing strip of the invention is for being sealed the gap between sieve after combination.
The present invention improves optimization to the sieve bottom structure of Bar strip type coal dust vibration sieve, improves its interception and sieving capacity, from
And improve and stablize the quality of pc of beans pulverized coal preparation system.Since beans pulverized coal preparation system is at present only this, the whole nation, so sieve
The optimization Need Hierarchy Theory at bottom calculates, with greater need for pilot production, so by constantly online installation test, so that it is determined that original
On the basis of coal dust vibration sieve structure is constant, increase the technical solution of one layer of square hole type sieve.And by multiple repetition test,
In the case where ensuring beans powder production capacity, it is determined that the key parameters such as the reasonable pitch-row in square hole screen bottom and aperture.
The present invention has the advantages that 1) by the transformation to single equipment partial structurtes in pulverized coal preparation system, to realize
Coal dust vibration sieve intercepts and the promotion of sieving capacity, to achieve the purpose that promote beans quality of pc；2) screening group is used, and
Lower screen in screening group is the square hole type sieve of stainless steel plate punching, and sieve bottom overall weight increases seldom, will not influence sieve
Divide effect；3) the various sundries to be got off by the upper sieve mesh screen in screening group can effectively be intercepted by lower screen bottom, it is ensured that beans
The stabilization of quality of pc；4) stainless steel mesh for applying U-shaped structure ensure that in vibration environment, which has certain
Extensibility, it is not easy to which vibration is split；And U-shaped structure increases the spacing of two layers of sieve, is conducive to the flowing of material, is also convenient for online clear
Reason sieve bottom.
Beans coal dust vibration sieve of the invention uses Combined screen mesh, and quality of pc not only gets a promotion, but also can be steady in a long-term
In higher level.The judgement of rifle index is blocked up from blast furnace, present every shift blocks up rifle number and is reduced to 5 times or less.The prior art is as increased
The double-deck bar screen bottom, although sundries can be intercepted effectively, its disadvantage is significant: it is this sieve bottom production only 1 hour or so when
Between, the sundries such as fiber will seriously wind rod, serious to restrict powder production capacity processed, and sieve in bottom between upper and lower level sieve spacing too
It is small, it is difficult to Hand scarf sundries；And bilayer bar screen weight increase is more, also will affect vibration sieve screening effect.
Detailed description of the invention
Fig. 1 is beans pulverized coal preparation system process flow chart；
Fig. 2 is coal dust vibration sieve structure schematic diagram；
Fig. 3 is the structural schematic diagram of Bar strip type sieve；
Fig. 4 is the structural schematic diagram of screening group of the present invention；
Fig. 5 is the top view of Fig. 4；
Appended drawing reference: 1, combustion gas furnace；2, hammer mill；3, feeder belt；4, cyclone separator；5, butterfly valve；6,1#
Unloading valve；7,1# coal dust vibration sieve；8,2# coal dust vibration sieve；9,2# unloading valve；10, screw conveyor；11, cloth bag collection machine；12, main
Air-introduced machine；13, coal powder entrance；14, upper sieve nest；15, bottom is sieved；16, lower sieve nest；17, Bar strip type sieve；18, U-shaped square hole type sieve
Net；19, sealing strip；20 fixing pieces.
Specific embodiment
With the drawings and specific embodiments, the present invention is described in further detail below.
Embodiment 1
As shown in Figure 4 and Figure 5, the sieve bottom of a kind of Bar strip type coal dust vibration sieve, the sieve bottom include three-layer screen group, and described three
Any layer screening group in layer screening group includes Bar strip type sieve 17 and U-shaped square hole type sieve 18, Bar strip type sieve 17 and U-shaped side
Sealing strip 19 is set between cellular type sieve 18 and is fixed together by fixing piece 20.
Shown screening group is respectively upper layer, middle layer, lower layer.
According to the square hole type sieve of the installation dimension production mating U-shaped structure of three pieces of Bar strip type sieve.Between two layers of sieve
Add sealing strip, using flange bolt and coal dust vibration sieve in upper sieve nest and lower sieve nest be attached installation.Sieve bottom is installed
Afterwards, the test of beans p owder production can be started, during which pay attention to the parameters such as concern powder yield processed, vibration sieve amplitude, coal dust result of laboratory test.
It is constantly optimized by test of many times, so that it is determined that quality of pc can be steady in the case where guaranteeing beans powder production capacity
The significant datas such as the pitch-row at the square hole screen bottom promoted surely and aperture.
It is shaken after sieving the above-mentioned transformation of completion to coal dust, during beans p owder production, powder production capacity processed can meet blast furnace substantially
Blowing demand.The structure for sieving the square hole screen bottom of stainless steel plate punching in bottom increases seldom, substantially without shadow sieve bottom overall weight
Ring screening effect；The various sundries to be got off by upper screen can effectively be intercepted by lower screen, it is ensured that beans quality of pc
Stablize；The stainless steel mesh of U-shaped structure, ensure that in vibration environment, and sieve has certain extensibility, it is not easy to which vibration is split；
And U-shaped structure increases the spacing of two layers of sieve, is conducive to the flowing of material, is also convenient for Hand scarf lower screen.Beans coal
After powder vibration sieve Double-layer screen transformation, quality of pc not only gets a promotion, but also can be steadily in the long term in higher level.It is stifled from blast furnace
The judgement of rifle index, present every shift block up rifle number and are reduced to 5 times or less.
Comparative example 1
Before technological invention application, the invention at double-layer siamesed bar screen bottom was once tested, careless grid carried in raw coal etc. are miscellaneous
Object forms fibrous sundries after powder hammer-crusher processed, will be wrapped on rod by bar screen bottom, seriously affects powder processed and produces
Can, and because spacing is smaller between two layer screen bottom, it is difficult to Hand scarf also has larger restriction to raising powder production capacity；And it is double
Layer bar screen weight increase is more, also will affect vibration sieve screening effect.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, it will be apparent to an ordinarily skilled person in the art that technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (1)
1. a kind of sieve bottom of Bar strip type coal dust vibration sieve, the sieve bottom includes three-layer screen group, respectively upper layer, middle layer, lower layer,
It is characterized in that, any layer screening group in three-layer screen group includes Bar strip type sieve (17) and U-shaped square hole type sieve (18), rod
Sealing strip (19) are set between formula sieve (17) and U-shaped square hole type sieve (18) and are fixed together by fixing piece (20)；
The U-shaped square hole type sieve has U-shaped structure in vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008294.1A CN105478353B (en) | 2016-01-07 | 2016-01-07 | A kind of sieve bottom of Bar strip type coal dust vibration sieve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008294.1A CN105478353B (en) | 2016-01-07 | 2016-01-07 | A kind of sieve bottom of Bar strip type coal dust vibration sieve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105478353A CN105478353A (en) | 2016-04-13 |
| CN105478353B true CN105478353B (en) | 2019-01-08 |
Family
ID=55665832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610008294.1A Active CN105478353B (en) | 2016-01-07 | 2016-01-07 | A kind of sieve bottom of Bar strip type coal dust vibration sieve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105478353B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110711695A (en) * | 2019-11-10 | 2020-01-21 | 江苏九洲环保技术有限公司 | Polyolefin master batch sizing vibrating screen |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2402411Y (en) * | 1999-09-15 | 2000-10-25 | 刘玉镇 | Screen mesh |
| CN2520218Y (en) * | 2002-02-06 | 2002-11-13 | 孙功民 | Compound double-layer cantilever screen mesh |
| CN100430157C (en) * | 2007-07-02 | 2008-11-05 | 王为 | Cylinder screening equipment |
| CN202129216U (en) * | 2011-06-13 | 2012-02-01 | 张梦迪 | Novel mesh-variable sieve |
| CN202238652U (en) * | 2011-09-01 | 2012-05-30 | 上海盾牌矿筛有限公司 | Dual-layer composite anti-hole blockage screen mesh |
| CN202655224U (en) * | 2012-04-19 | 2013-01-09 | 成都智利达科技有限公司 | Novel grading screening machine |
| CN104415909A (en) * | 2013-08-22 | 2015-03-18 | 天津市汉达特碳制品有限公司 | Multi-stage vibrating sieve |
| CN205463174U (en) * | 2016-01-07 | 2016-08-17 | 山东钢铁股份有限公司 | Rod formula buggy shakes at bottom of sieve that sieves |
-
2016
- 2016-01-07 CN CN201610008294.1A patent/CN105478353B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105478353A (en) | 2016-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103934082A (en) | Novel mineral slag grinding system | |
| CN204710675U (en) | A kind of raw material crushing-separating apparatus of refractory material | |
| CN105236782A (en) | Machine-made sand production system, and production method and application thereof | |
| CN203862359U (en) | Novel slag grinding system | |
| CN108380380A (en) | Product dry type fine crushing sorts Iron concentrate technique | |
| CN103949322A (en) | Nickel slag grinding system and production process thereof | |
| CN105478353B (en) | A kind of sieve bottom of Bar strip type coal dust vibration sieve | |
| CN111215220A (en) | Production process system for producing multi-product machine-made sand | |
| CN103272711A (en) | Iron mine powder multi-level air classifying system and method | |
| CN108114771A (en) | A kind of breaking magnetic separator | |
| CN207238206U (en) | A kind of environment-friendly type pulverized coal preparation system | |
| CN205463174U (en) | Rod formula buggy shakes at bottom of sieve that sieves | |
| CN110468274A (en) | Electric furnace ash prepares cold-consolidated ball Processes and apparatus | |
| CN204325392U (en) | A kind of beans pulverized coal preparation system | |
| CN104876463A (en) | Dry machine-made sand production system | |
| CN205613709U (en) | A buggy separator for high -efficient boiler | |
| CN211012464U (en) | Combustion size classification device for iron-making sintering | |
| CN104451006B (en) | A kind of beans pulverized coal preparation system and milling method | |
| CN205199601U (en) | Material scattering machine | |
| CN203281437U (en) | Multi-stage air classification system for powdered iron ore | |
| CN204841987U (en) | Selection bed deashes | |
| CN206997042U (en) | Environment-friendly type ore sizing system | |
| CN206304792U (en) | A kind of energy saving and environment friendly Rice processor | |
| CN104399667A (en) | Stainless steel slag sorting device and stainless steel slag sorting method | |
| CN205496052U (en) | Bitonic screen separation STREAMING efficinet separator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |