CN101135494A - Hole design of six-petal plum blossom hole hot-blast stove grate - Google Patents
Hole design of six-petal plum blossom hole hot-blast stove grate Download PDFInfo
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- CN101135494A CN101135494A CNA2007101574338A CN200710157433A CN101135494A CN 101135494 A CN101135494 A CN 101135494A CN A2007101574338 A CNA2007101574338 A CN A2007101574338A CN 200710157433 A CN200710157433 A CN 200710157433A CN 101135494 A CN101135494 A CN 101135494A
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- 238000013461 design Methods 0.000 title claims abstract description 18
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 57
- 239000011449 brick Substances 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 238000009423 ventilation Methods 0.000 abstract description 16
- 238000005266 casting Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 229910003460 diamond Inorganic materials 0.000 description 8
- 239000010432 diamond Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 230000008602 contraction Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention relates to the field of a grate system of a hot blast stove of an iron-making blast furnace, in particular to a hole pattern design of a grate of a hot blast stove with six petals and plum blossom holes. Seven densely arranged round holes corresponding to the cast iron grid blocks and the checker bricks on the grate of the hot blast stove are combined into a six-petal plum blossom hole, the section of the contact part of the upper surface of the cross beam and the grate is reduced, the vent hole of the contact part of the cross beam is made into a six-petal plum blossom hole and an infinity hole, and the six-petal plum blossom hole grate with various external dimensions is formed by arranging and combining the six-petal plum blossom hole, the round hole, the infinity hole, the three-petal plum blossom hole and other hole patterns, and the blast furnace hot blast stove is designed into a corresponding structural form. The invention has the advantages of reasonable casting structure, uniform wall thickness, consistent strength and rigidity in all directions, good stability of the cast iron checker blocks and checker bricks, high system stability and strong bearing capacity; the structural stress is small, the problems of deformation and cracking caused by shrinkage, expansion and load in the manufacturing and using processes are solved, and the service life is prolonged; the ventilation area is large, and the ventilation rate is high; the manufacturing cost is low, and the manufacturing process is simple.
Description
Technical field
The present invention relates to design, manufacturing, installation, debugging, the operation technique field of blast furnace hot-blast stove fire grate system, particularly a kind of pass design of six lobe plum blossom hole hot-blast stove fire grates.
Background technology
Hot-blast stove is the capital equipment of blast furnace air feed system, is the air blast heating facility of being piled up by checker brick.Checker brick absorb and storing heat in the Combustion of Hot Air Furnace phase as the carrier of heat of high temperature, are on air emitting heat heating air blast.By dwindling checker brick brick bore dia, can increase the heating surface (area) (HS of stove fillings, guarantee to have enough heat exchanges in the unit interval; Can increase the heat storage volume of stove fillings, guarantee necessary hot storage capacity, improve the blast furnace air temperature, for blast furnace brings good benefit.For this reason, the trend that gradually adopts the small-bore checker brick is arranged in the high-temperature and long-efficiency hot blast stove design, design and adopted the different apertures of series such as 19 holes, 31 holes, 37 holes, 61 holes, the checker brick of different pass (round or polygonal).Increase along with the diminishing of checker brick aperture, hole count on the one hand, has increased the displacement of fire grate foundry goods expanded by heating, drives the aperture, the displacement of porous checker brick at place, adjacent two fire grate slits and the problem damaged; On the other hand, along with the increase of the reducing of fire grate foundry goods air grating hole dimension, air grating hole number, its manufacture difficulty strengthens.For this reason, a lot of high-temperature and long-efficiency hot-blast stoves begin to adopt one deck cast iron grid piece (cast iron flow distribution plate) identical with the checker brick section as transition between fire grate and checker brick, have occurred the hot-blast stove fire grate version of checker brick-cast iron flow distribution plate-intensive circular hole fire grate-pillar and checker brick-cast iron grid piece-diamond hole fire grate (or hexagonal mesh hole fire grate)-crossbeam-pillar accordingly.The hot-blast stove fire grate system of checker brick-cast iron flow distribution plate-intensive circular hole fire grate-pillar, its cast iron flow distribution plate has adopted the pass structure of a kind of " four-way ", following one bigger circular hole is split into the small sircle hole of three dense distribution, is used with different apertures checker brick; Big hole below it positions by the circular hole of two step ladder circular rings and intensive circular hole fire grate; Fire grate is by shore supports independently, and fire grate adopts seam location with an intercolumniation.The center of gravity of fire grate and the central lines of pillar or close make that the resistance to overturning of hot-blast stove fire grate system of this version is relatively poor.The size that is adopted strengthens intensive round checkerwork cell can be convenient to Foundry Production by the cooperating of the realization of cast iron flow distribution plate and aperture, porous checker brick; But its circular casting section thickness that is the intensive arrangement is inhomogeneous, easily cracks during casting; Compare with the fire grate of other pass, the fire grate weight of unit are is big, the manufacturing cost height.
In version is in the hot-blast stove fire grate system of checker brick-cast iron grid piece-diamond hole fire grate (or hexagonal mesh hole fire grate)-crossbeam-pillar, the cast iron grid piece that plays fixation positions by annulus of its underpart and the rhombus of fire grate (perhaps hexagon) checkerwork cell, every fire grate is supported by two crossbeams, the two ends of crossbeam are by two shore supports, a pillar can support two crossbeams simultaneously, though this hot-blast stove fire grate stability of a system increases, and yet has the following disadvantages:
1) plays the annulus of cast iron grid piece bottom of fixation and rhombus (hexagon) checkerwork cell of fire grate, only can limit the displacement of its horizontal direction, can not limit the rotation of cast iron grid piece axial direction, also exist because of the displacement of fire grate expanded by heating, rotate the problem that causes the checker brick displacement and damage and drive cast iron grid piece;
The intensity difference of the diamond hole fire grate that 2) is adopted (or hexagonal mesh hole fire grate) all directions, in manufacturing and use, the temperature variant contraction of all directions, swell increment difference easily cause distortion, cracking problem, manufacture difficulty is bigger, and service life is short;
3) diamond hole fire grate (hexagonal mesh hole fire grate) checkerwork cell dowel infall is that wedge angle connects, make and use in have distortion, cracking problem, the structural stability of fire grate is poor, intensity, bearing capacity are low, are used for medium and small blast furnace more;
4) at the infall in rhombus checkerwork cell (hexagonal mesh hole), cast iron grid piece instability, the checker brick on cast iron grid piece and top thereof have the possibility of inclination, displacement, influence the stability of system;
5) checkerwork cell of the cast iron grid piece on diamond hole fire grate (hexagonal mesh hole fire grate) checkerwork cell dowel and its top has a large amount of juxtapositions, and the air vent checkerwork cell of cast iron grid piece is influenced ventilation effect by partial occlusion;
6) on hot-blast stove round edge edge, the dowel place that increases for the structural strength that increases diamond hole fire grate (or hexagonal mesh hole fire grate) can't design air vent, reduces the ventilation effect of its top cast iron grid piece and checker brick;
7) be distributed with the △ type ventilation checkerwork cell of a large amount of small bores on the fire grate of hexagonal mesh hole, the Foundry Production difficulty is bigger, will be blocked with the △ type ventilation checkerwork cell of crossbeam contact position, influences ventilation effect.
Except that the hot-blast stove fire grate system of said structure form, also generally adopt a kind of hot-blast stove fire grate system that forms by three lobe plum blossom hole fire grate-crossbeam-pillars at present.The stability of the hot-blast stove fire grate system of this version is better, and the bearing capacity height of fire grate adopts cast iron grid piece partly to solve because of fire grate expanded by heating, displacement, drives the checker brick displacement of locating in adjacent two fire grate slits and the problem of damaging.But because the quincunx ventilation checkerwork cell of three lobes sectional dimension is less, the location of cast iron grid piece is difficult to realize.Under the situation that adopts the small-bore checker brick, the air grating aperture of fire grate is also along with dwindling, and the ventilation checkerwork cell that causes itself and crossbeam contact portion is by partial occlusion.
Summary of the invention
Purpose of the present invention is exactly by using for reference the hot-blast stove fire grate system characteristics of various versions, providing a kind of new pass structure fire grate that can satisfy the demand of blast funnace hot blast stove high-temperature and long-efficiency: the pass design of six lobe plum blossom hole hot-blast stove fire grates.
The objective of the invention is to realize by following technical proposals:
The pass design of six lobe plum blossom hole fire grates of the present invention, it is characterized in that with on the blast furnace hot-blast stove fire grate with cast iron grid piece, seven dense arrangement circular holes of checker brick correspondence are merged into one six lobe plum blossom hole, with above the crossbeam with the reduced cross-sectional of fire grate contact position, to make six lobe plum blossom holes with the air vent of crossbeam contact position, six lobe plum blossom hole and circular holes are also passed through in ∞ word hole, ∞ word hole or three lobe plum blossom hole diplodal permutation and combination form six lobe plum blossom hole fire grates of various appearance and sizes, the corresponding version that blast funnace hot blast stove is designed to checker brick-six lobe plum blossom hole fire grate-crossbeam-pillar or checker brick-cast iron grid piece-six lobe plum blossom hole fire grate-crossbeam-pillar.
Described version is the blast funnace hot blast stove fire grate system of checker brick-cast iron grid piece-six lobe plum blossom hole fire grate-crossbeam-pillar, to locate cast iron grid piece bottom and be made into and the corresponding various boss forms of fire grate pass, cast iron grid piece will be carried out level and circumferencial direction location.
To be merged into one six lobe plum blossom hole with cast iron grid piece, seven dense arrangement circular holes that checker brick are corresponding on the described fire grate, and form six lobe plum blossom hole fire grates of various appearance and sizes by the permutation and combination of six lobe plum blossom holes and circular hole, ∞ word hole or three lobe plum blossom hole diplodals.
Cast iron grid piece bottom, described location is made into and the corresponding various boss forms of fire grate pass, cast iron grid piece is carried out level and circumferencial direction location.
The periphery place of the straight flange that the needs of described hot-blast stove fire grate are gained in strength, circular arc limit and six lobe plum blossom holes only is provided with some circular holes and circular hole combination bore.
In described hot-blast stove fire grate and crossbeam contact position, the combination bore that some are merged into by a plurality of circular holes is set, to guarantee ventilation effect.
The pass of six lobe plum blossom hole fire grates of the present invention has that casting structure is reasonable, and wall thickness is even, all directions intensity, rigidity unanimity, and the good stability of cast iron grid piece, checker brick, stability of a system height, bearing capacity is strong; Realize between the ventilation checkerwork cell that the circular arc wall thickness connects, structural stress is little, can solve contraction in manufacturing, the use, expansion, load preferably and the distortion, the cracking problem that cause, can prolong hot-blast stove fire grate system long service life; The fire grate draught area of unit are is big, and the ventilation rate height can be used with the checker brick in various apertures, and it is smooth and easy to ventilate; Fire grate in light weight, low cost of manufacture, manufacturing process is simple, and form and position tolerance is easy to characteristics such as assurance.Not isometric blast furnace, hot blast stove design become the version of checker brick-six lobe plum blossom hole fire grate-crossbeam-pillar or checker brick-cast iron grid piece-six lobe plum blossom hole fire grate-crossbeam-pillar.
Below with certain 4350m
3Blast funnace hot blast stove fire grate system be example, the six lobe plum blossom hole fire grates of being invented are further described.What as shown in the figure, hot-blast stove fire grate system adopted is the version of checker brick-cast iron grid piece-six lobe plum blossom hole fire grate-crossbeam-pillar.On the basis that guarantees the crossbeam support strength, with above the crossbeam with the reduced cross-sectional of fire grate contact position; Forms such as six lobe plum blossom holes, ∞ word hole will be made, to guarantee ventilation effect with the air vent of crossbeam contact position; The fire grate of various appearance and sizes is arranged in a combination by six lobe plum blossom holes and circular hole, ∞ word hole; The layout of location cast iron grid piece, plain cast iron grid piece is arranged according to alternately arranging by linearly aligned six lobe plum blossom holes in individual direction, realizes the location.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is for pressing the structural representation of linearly aligned six lobe plum blossom holes and circular hole, ∞ word hole combination stove grate.
Fig. 3 is the structural representation with the corresponding location of six lobe plum blossom holes cast iron grid piece.
The structural representation that the six lobe plum blossom hole fire grates that Fig. 4 arranges for intensity cooperate with cast iron grid piece.
The specific embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
As shown in Figure 1, the pass design of six lobe plum blossom hole fire grates of the present invention, it is characterized in that with on the blast furnace hot-blast stove fire grate with cast iron grid piece 5, seven dense arrangement circular holes of checker brick correspondence are merged into one six lobe plum blossom hole, with above the crossbeam 2 with the reduced cross-sectional of fire grate contact position, to make six lobe plum blossom holes or ∞ word hole and form six lobe plum blossom hole fire grates of various appearance and sizes, the corresponding version that blast funnace hot blast stove is designed to checker brick-six lobe plum blossom hole fire grate 3-crossbeam 2-pillar 1 or checker brick-cast iron grid piece 5-six lobe plum blossom hole fire grate 3-crossbeam 2-pillars 1 with the air vent of crossbeam 2 contact positions by six lobe plum blossom holes and circular hole or ∞ word hole or three lobe plum blossom hole diplodal permutation and combination.
Described version is the blast funnace hot blast stove fire grate system of checker brick-cast iron grid piece 5-six lobe plum blossom hole fire grate 3-crossbeam 2-pillars 1, to locate cast iron grid piece 4 bottoms and be made into and the corresponding various boss forms of fire grate pass, cast iron grid piece 5 will be carried out level and circumferencial direction location.
As Fig. 2, shown in Figure 4, to be merged into one six lobe plum blossom hole with cast iron grid piece 5, seven dense arrangement circular holes that checker brick are corresponding on the described fire grate, and form six lobe plum blossom hole fire grates of various appearance and sizes by the permutation and combination of six lobe plum blossom holes and circular hole, ∞ word hole or three lobe plum blossom hole passes.Fig. 2 is for pressing the structural representation of linearly aligned six lobe plum blossom holes and circular hole, ∞ word hole combination stove grate.The structural representation that the six lobe plum blossom hole fire grates that Fig. 4 arranges for intensity cooperate with cast iron grid piece 5.
Cast iron grid piece 5 bottoms, described location are made into and the corresponding various boss forms of fire grate pass, cast iron grid piece is entered 5 row levels and circumferencial direction location.
The periphery place of the straight flange that the needs of described hot-blast stove fire grate are gained in strength, circular arc limit and six lobe plum blossom holes only is provided with some circular holes and circular hole combination bore.
In described hot-blast stove fire grate and crossbeam 2 contact positions, the combination bore that some are merged into by a plurality of circular holes is set, to guarantee ventilation effect.
The advantage of the intensive circular hole fire grate of collection of the present invention, three lobe plum blossom hole fire grates, diamond hole fire grate and hexagonal mesh hole fire grate has overcome its deficiency separately, and has had following Some features:
1) casting structure is reasonable, and wall thickness is even, and all directions intensity, rigidity are consistent, and resistance to overturning is good, Bearing capacity is strong;
2) the circular arc wall thickness connects, and structural stress is little, can solve preferably in manufacturing, the use procedure to receive Contracting, expansion, load and the distortion, the problem of Cracking that cause are conducive to simplified manufacturing technique, prolongation makes Use the life-span;
3) can realize the unimpeded of all air vents, the via area of checker brick is unaffected;
4) can be used with the checker brick in various apertures, manufacturing process is simple, and the accuracy of manufacture is higher, The form and position tolerance of ventilation checkerwork cell is easy to guarantee;
5) the fire grate draught area of unit are is big, the ventilation rate height; Fire grate in light weight made Cost is low;
6) six lobe plum blossom holes are conducive to locate the spirit of the plain cast iron grid piece of cast iron grid piece and delocalization Live and arrange the good stability of cast iron grid piece, checker brick;
7) can adopt six lobe plum blossom hole fire grate-crossbeam-pillars or cast iron grid piece-six lobe plum blossom hole The hot-blast stove version of fire grate-crossbeam-pillar is to satisfy the blast furnace needs of various volumes.
Table 1 shows the comparison of various pass fire grates.
The comparison of table 1, various pass fire grates
| % by weight | Surface area % | Draught area % | Draught area/weight | Surface area/% by weight | |
| Intensive circular hole fire grate three lobe plum blossom hole fire grate diamond hole fire grate hexagon grid hole fire grate linear array six lobe plum blossom hole fire grate dense arrangement six lobe plum blossom hole fire grates | 100 72 61 77 67 82 | 100 85 58 84 76 90 | 100 144 171 148 152 141 | 0.5634 0.5634 0.5059 0.5068 0.5680 0.5064 | 100 118 96 109 115 109 |
Claims (6)
1. the pass of lobe plum blossom hole hot-blast stove fire grate design, it is characterized in that and to be merged into one six lobe plum blossom hole with cast iron grid piece, seven dense arrangement circular holes that checker brick are corresponding on the hot-blast stove fire grate, and form six lobe plum blossom hole fire grates of various appearance and sizes, the corresponding version that blast funnace hot blast stove is designed to checker brick-six lobe plum blossom hole fire grate-crossbeam-pillar or checker brick-cast iron grid piece-six lobe plum blossom hole fire grate-crossbeam-pillar by the pass permutation and combination of six lobe plum blossom holes and circular hole, ∞ word hole or three lobe plum blossom holes.
2. the pass design of six lobe plum blossom hole fire grates according to claim 1, it is characterized in that described version is the blast funnace hot blast stove fire grate system of checker brick-cast iron grid piece-six lobe plum blossom hole fire grate-crossbeam-pillar, to locate cast iron grid piece bottom and be made into and the corresponding various boss forms of fire grate pass, cast iron grid piece will be carried out level and circumferencial direction location.
3. the pass design of six lobe plum blossom hole fire grates according to claim 1, it is characterized in that and to be merged into one six lobe plum blossom hole with cast iron grid piece, seven dense arrangement circular holes that checker brick are corresponding on the described fire grate, with above the crossbeam with the reduced cross-sectional of fire grate contact position, to make six lobe plum blossom holes, ∞ word hole with the air vent of crossbeam contact position, and form six lobe plum blossom hole fire grates of various appearance and sizes by the permutation and combination of six lobe plum blossom holes and circular hole, ∞ word hole or three lobe plum blossom holes.
4. the pass design of six lobe plum blossom hole fire grates according to claim 1 is characterized in that cast iron grid piece bottom, described location is made into and the corresponding various boss forms of fire grate pass, and cast iron grid piece is carried out level and circumferencial direction location.
5. the design of the pass of six lobe plum blossom hole fire grates according to claim 1 is characterized in that the periphery place of straight flange, circular arc limit and the six lobe plum blossom holes of gaining in strength at the needs of described hot-blast stove fire grate some circular holes and circular hole combination bore only being set.
6. the pass design of six lobe plum blossom hole fire grates according to claim 1 is characterized in that in described hot-blast stove fire grate and crossbeam contact position, and the combination bore that is merged into by a plurality of circular holes is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101574338A CN100513921C (en) | 2007-10-15 | 2007-10-15 | Hole design of six-petal plum blossom hole hot-blast stove grate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101574338A CN100513921C (en) | 2007-10-15 | 2007-10-15 | Hole design of six-petal plum blossom hole hot-blast stove grate |
Publications (2)
| Publication Number | Publication Date |
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| CN101135494A true CN101135494A (en) | 2008-03-05 |
| CN100513921C CN100513921C (en) | 2009-07-15 |
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| CNB2007101574338A Expired - Fee Related CN100513921C (en) | 2007-10-15 | 2007-10-15 | Hole design of six-petal plum blossom hole hot-blast stove grate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371344A (en) * | 2010-08-20 | 2012-03-14 | 鞍钢重型机械有限责任公司 | Process for casting hot air grate for blast furnace |
| CN102049471B (en) * | 2009-10-27 | 2012-11-14 | 鞍钢重型机械有限责任公司 | Design method for grate core of grid hole hot blast stove |
| CN103672911A (en) * | 2012-09-25 | 2014-03-26 | 北京凯吉盛工贸发展有限公司 | Fire grate and incinerator employing the same |
| CN108844088A (en) * | 2018-06-19 | 2018-11-20 | 鞍钢重型机械有限责任公司 | A kind of abnormity plum blossom hole fire grate and stove fillings support system |
| CN111981851A (en) * | 2020-06-24 | 2020-11-24 | 中冶南方武汉钢铁设计研究院有限公司 | Grate with flow dividing function |
| CN112063787A (en) * | 2020-09-28 | 2020-12-11 | 中冶京诚工程技术有限公司 | Hot-blast furnace checker brick strutting arrangement |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1461822A (en) * | 1973-03-19 | 1977-01-19 | Didier Werke Ag | Checkerwork-supporting grate for blast furnace stoves |
| US4308910A (en) * | 1977-01-07 | 1982-01-05 | Davy Inc. | Checkerwork supporting means |
| CN2066863U (en) * | 1989-12-26 | 1990-12-05 | 冶金工业部重庆钢铁设计研究院 | Grate for blast furnace hot-blast stove and support pillar |
| CN2396359Y (en) * | 1999-11-24 | 2000-09-13 | 河南拓普炼铁技术联合开发公司 | Seven hole checker brick with plum blossom shaped checker hole |
| JP4015052B2 (en) * | 2003-04-18 | 2007-11-28 | 新日鉄エンジニアリング株式会社 | Gitter brick for hot stove |
| CN201137947Y (en) * | 2007-10-15 | 2008-10-22 | 鞍钢重型机械有限责任公司冶炼设备制造厂 | Hole design of six-petal plum blossom hole hot-blast stove grate |
-
2007
- 2007-10-15 CN CNB2007101574338A patent/CN100513921C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049471B (en) * | 2009-10-27 | 2012-11-14 | 鞍钢重型机械有限责任公司 | Design method for grate core of grid hole hot blast stove |
| CN102371344A (en) * | 2010-08-20 | 2012-03-14 | 鞍钢重型机械有限责任公司 | Process for casting hot air grate for blast furnace |
| CN102371344B (en) * | 2010-08-20 | 2015-05-27 | 鞍钢重型机械有限责任公司 | Process for casting hot air grate for blast furnace |
| CN103672911A (en) * | 2012-09-25 | 2014-03-26 | 北京凯吉盛工贸发展有限公司 | Fire grate and incinerator employing the same |
| CN108844088A (en) * | 2018-06-19 | 2018-11-20 | 鞍钢重型机械有限责任公司 | A kind of abnormity plum blossom hole fire grate and stove fillings support system |
| CN108844088B (en) * | 2018-06-19 | 2024-05-17 | 鞍钢重型机械有限责任公司 | Grid with special-shaped plum blossom holes and hot-blast stove lattice brick supporting system |
| CN111981851A (en) * | 2020-06-24 | 2020-11-24 | 中冶南方武汉钢铁设计研究院有限公司 | Grate with flow dividing function |
| CN112063787A (en) * | 2020-09-28 | 2020-12-11 | 中冶京诚工程技术有限公司 | Hot-blast furnace checker brick strutting arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100513921C (en) | 2009-07-15 |
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