CN103937920A - Blast furnace center conical segment throat pipe and treating method for wear-resistant structure thereof - Google Patents
Blast furnace center conical segment throat pipe and treating method for wear-resistant structure thereof Download PDFInfo
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- CN103937920A CN103937920A CN201410188677.2A CN201410188677A CN103937920A CN 103937920 A CN103937920 A CN 103937920A CN 201410188677 A CN201410188677 A CN 201410188677A CN 103937920 A CN103937920 A CN 103937920A
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Abstract
The invention discloses a blast furnace center conical segment throat pipe and a treating method for a wear-resistant structure thereof, belonging to the technical fields of design and manufacture of accessory devices of metallurgical equipment. The invention provides a blast furnace center conical segment throat pipe strong in wear resistance and long in service life and a treating method for the wear-resistant structure of the blast furnace center conical segment throat pipe. The blast furnace center conical segment throat pipe comprises a blast furnace center conical segment throat pipe matrix, wherein a wear-resistant structure composed of a wear-resistant cladding layer and a wear-resistant mounting layer is covered on the surface at the inner side of the blast furnace center conical segment throat pipe matrix, and the wear-resistant cladding layer is covered on the wear-resistant mounting layer and the inner side wall of the blast furnace center conical segment throat pipe matrix which is not provided with the wear-resistant mounting layer. According to the treating method, infiltration is realized in such a way that the inner side of the blast furnace center conical segment throat pipe matrix is provided with a refractory accommodating cavity for accommodating wear-resistant material powder, and then, the blast furnace center conical segment throat pipe matrix is wholly heated through a resistance furnace.
Description
Technical field
The present invention relates to a kind of blast furnace center cone section trunnion, belong to metallurgical equipment auxiliary equipment design and manufacturing technology field.The invention still further relates to a kind for the treatment of process for described blast furnace center cone section trunnion abrasion-proof structure.
Background technology
At present, the center cone section trunnion in domestic adjustment of Top Charging Equipment generally adopts build-up wear-resistant wlding or adopts wear resistance castings manufacture.Because described blast furnace center cone section trunnion is positioned at opening for feed top, the erosive wear of bearing furnace charge is the most serious, is generally work-ing life about 8 months; And the suffered erosive wear of described center cone section trunnion lower part equipment is relatively little, can reach about 2 years its work-ing life, causes center cone section trunnion and bottom relevant device turnaround to differ greatly.Integral replacing causes the running cost of equipment to roll up, and also can cause the waste of resource simultaneously; Do not change, have a strong impact on again normally carrying out of production, not only reduce turnout, but also can cause the waste of raw materials for production, lose more than gain on the contrary.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of fastness to wear strong, the blast furnace center cone section trunnion of long service life.The present invention also provides a kind for the treatment of process for described blast furnace center cone section trunnion abrasion-proof structure.
For solving the problems of the technologies described above adopted technical scheme be: described blast furnace center cone section trunnion comprises blast furnace center cone section trunnion matrix, on the inner surface of described blast furnace center cone section trunnion matrix, be coated with the abrasion-proof structure being made up of wear-resisting cladding layer and wear-resisting mounting layer, described wear-resisting cladding layer covers described wear-resisting mounting layer and does not install on the inner side-wall of described blast furnace center cone section trunnion matrix of described wear-resisting mounting layer.
Further to be provided with mounting groove on the basic inner side-wall of described blast furnace center cone section trunnion, described wear-resisting mounting layer is made up of wear-resisting alloy block, and described wear-resisting alloy block is arranged on the inner side-wall of described blast furnace center cone section trunnion matrix by described mounting groove.
Further, described wear-resisting cladding layer is fused at described wear-resisting alloy block and the wear-resistant alloy layer on the described blast furnace center cone section trunnion matrix inner side-wall of described wear-resisting mounting layer is not installed by pattern of invasion.
Be further, described mounting groove being projected as in its vertical section interior large outside little dovetail-indent, the wear-resisting alloy block being arranged in described mounting groove is the swallow-tail form wear-resisting alloy block suitable with described dovetail-indent shape, and described swallow-tail form wear-resisting alloy block is infiltrated and is connected with described dovetail-indent by described wear-resisting cladding layer.
For the treatment process of described blast furnace center cone section trunnion abrasion-proof structure, comprise the following steps,
A, prepare loose tool inside blast furnace center cone section trunnion matrix and the container cavity of resistance to material,
According to the described blast furnace center cone section trunnion matrix of design paper preparation, and on the inner side-wall of described blast furnace center cone section trunnion matrix, prepare the mounting groove that wear-resisting alloy block is installed,
According to the container cavity of resistance to material design paper, preparation shape and described blast furnace center cone section trunnion base shape are suitable, and loose tool inside the container cavity of resistance to material of the participation formation container cavity of resistance to material;
B, assemble wear-resisting alloy block and assemble the container cavity of resistance to material,
First needs are infiltrated to the wear-resisting alloy block of described blast furnace center cone section trunnion matrix inner side, are installed on described blast furnace center cone section trunnion matrix by described mounting groove,
And then by loose tool inside the described container cavity of resistance to material, be installed to the inner side of the above-mentioned blast furnace center cone section trunnion matrix that wear-resisting alloy block has been installed, form the taper container cavity of resistance to material that comprises loose tool inside blast furnace center cone section trunnion matrix and the container cavity of resistance to material, and at the large end of the described taper container cavity of resistance to material, opening is set;
C, filling high-abrasive material, infiltration material and treating compound,
First in the described taper container cavity of resistance to material, load high-abrasive material powder tamping by described opening,
And then cross section is installed on described opening is funnel shaped container cavity, and infiltrate material and appropriate liquid immersion agent to filling in appropriate particulate state in described container cavity successively;
D, infiltrate, first by the above-mentioned high-abrasive material powder that is filled with, particulate state infiltrates the blast furnace center cone section trunnion matrix of material and liquid immersion agent and puts into resistance furnace, then start the resistive heater of described resistance furnace, described in inciting somebody to action, be filled with high-abrasive material powder, particulate state infiltrates material and the blast furnace center cone section trunnion matrix homogeneous heating to 1150 of liquid immersion agent DEG C～1200 DEG C, be incubated at least 2 two hours, make to infiltrate material fusing and fully diffusion infiltrate to loose tool inside matrix and the container cavity of resistance to material, then after below being cooled to 250 DEG C with stove, the outer air cooling of stove forms blast furnace center cone section trunnion blank,
Loose tool inside e, the processing removal container cavity of resistance to material, after described blast furnace center cone section trunnion blank cool to room temperature, loose tool inside the container cavity of resistance to material described in removing by machining equipment again, has so just completed the once work for the treatment of of described blast furnace center cone section trunnion abrasion-proof structure.
Be further, in step a, the mounting groove of processing on described blast furnace center cone section trunnion matrix being projected as of its vertical section interior large outside little dovetail-indent, in step b, the wear-resisting alloy block being arranged in described mounting groove is the swallow-tail form high rigidity YG11C W-Co kind wear-resisting alloy block suitable with described dovetail-indent.
Further, in step c, be WC powdered alloy to the high-abrasive material powder loading in the described taper container cavity of resistance to material, i.e. carbon tungsten alloy powder.
Further, in step c, infiltrate material for manganese-copper particulate material to the particulate state of loading in described container cavity.
Further, be provided with shrouding on the top of container cavity described in step c, described shrouding, by described container cavity sealing, is provided with gap communication type exhaust guide on described shrouding.
Further, described gap communication type exhaust guide comprise vapor pipe and steel ball, are processed with V-type groove at the free end of described vapor pipe, being placed in described V-type groove of described steel ball activity.
The invention has the beneficial effects as follows: by being coated with the abrasion-proof structure being formed by wear-resisting cladding layer and wear-resisting mounting layer on the inner surface at described blast furnace center cone section trunnion matrix, and make described wear-resisting cladding layer cover described wear-resisting mounting layer and not install on the inner side-wall of described blast furnace center cone section trunnion matrix of described wear-resisting mounting layer.Like this; because described abrasion-proof structure has comprised the wearing layer of two-layer unlike material and structure; thereby described blast furnace center cone section trunnion was in use both made after the long-term frictional wear of wear-resisting cladding layer quilt of outside; still also have wear-resisting mounting layer below described blast furnace center cone section trunnion matrix is protected and be unlikely to scrap at once; so not only improve the fastness to wear of described blast furnace center cone section trunnion, and can effectively extend its work-ing life.Simultaneously, adopt wetting method disclosed by the invention, not only can effectively ensure the thickness of described wear-resisting cladding layer, and because infiltrating at high temperature fusing of material, described particulate state can fill up fully the gap between described wear-resisting alloy block and described mounting groove, can make the infiltration material of fusing fully spread through insulation infiltrates to matrix and loose tool, the wear-resisting alloy block that forms described wear-resisting mounting layer to improve is connected effect with the infiltration of blast furnace center cone section trunnion matrix, thereby after ensureing both to have made outer field wear-resisting cladding layer be worn, the fastness to wear of the wear-resisting mounting layer of internal layer also can not reduce because of coming off, and then make the fastness to wear of described blast furnace center cone section trunnion, obtain more efficiently guarantee work-ing life.
Brief description of the drawings
Fig. 1 is the vertical profile structural representation of blast furnace center cone section trunnion of the present invention;
Fig. 2 is the vertical profile schematic diagram of the blast furnace center cone section trunnion that relates to for the treatment of process of the present invention.
In figure, be labeled as: inside blast furnace center cone section trunnion matrix 1, wear-resisting cladding layer 2, wear-resisting mounting layer 3, abrasion-proof structure 4, mounting groove 5, the container cavity of resistance to material, loose tool 6, the container cavity of resistance to material 7, opening 8, high-abrasive material powder 9, container cavity 10, particulate state infiltrate material 11, liquid immersion agent 12, shrouding 13, vapor pipe 14, steel ball 15.
Embodiment
That a kind of fastness to wear provided by the invention is strong as shown in Figure 1 and Figure 2, the blast furnace center cone section trunnion of long service life, and a kind for the treatment of process for described blast furnace center cone section trunnion abrasion-proof structure.Described blast furnace center cone section trunnion comprises blast furnace center cone section trunnion matrix 1, on the inner surface of described blast furnace center cone section trunnion matrix 1, be coated with the abrasion-proof structure 4 being made up of wear-resisting cladding layer 2 and wear-resisting mounting layer 3, described wear-resisting cladding layer 2 covers described wear-resisting mounting layer 3 and does not install on the inner side-wall of described blast furnace center cone section trunnion matrix 1 of described wear-resisting mounting layer 3.In order further to improve the effect that is connected between described wear-resisting mounting layer 3 and described blast furnace center cone section trunnion matrix 1, improve the wear-resisting effect of wear-resisting cladding layer 2 and wear-resisting mounting layer 3 simultaneously, on the inner side-wall of described blast furnace center cone section trunnion basic 1, be provided with mounting groove 5, described wear-resisting mounting layer 3 is made up of wear-resisting alloy block, and described wear-resisting alloy block is arranged on by described mounting groove 5 on the inner side-wall of described blast furnace center cone section trunnion matrix 1; Described wear-resisting cladding layer 2 is for fusing at described wear-resisting alloy block and the wear-resistant alloy layer on described blast furnace center cone section trunnion matrix 1 inner side-wall of described wear-resisting mounting layer 3 not being installed by pattern of invasion; And described mounting groove 5 for being projected as in its vertical section interior large outside little dovetail-indent, the wear-resisting alloy block being arranged in described mounting groove 5 is the swallow-tail form wear-resisting alloy block suitable with described dovetail-indent shape, and described swallow-tail form wear-resisting alloy block is infiltrated and is connected with described dovetail-indent by described wear-resisting cladding layer 2.
For the treatment process of described blast furnace center cone section trunnion abrasion-proof structure, comprise the following steps,
A, prepare loose tool 6 inside blast furnace center cone section trunnion matrix 1 and the container cavity of resistance to material,
According to the described blast furnace center cone section trunnion matrix 1 of design paper preparation, and on the inner side-wall of described blast furnace center cone section trunnion matrix 1, prepare the mounting groove 5 that wear-resisting alloy block is installed,
According to the container cavity of resistance to material design paper, preparation shape and described blast furnace center cone section trunnion matrix 1 shape are suitable, and loose tool 6 inside the container cavity of resistance to material of the participation formation container cavity of resistance to material 7;
B, assemble wear-resisting alloy block and assemble the container cavity of resistance to material 7,
First needs are infiltrated to the wear-resisting alloy block of described blast furnace center cone section trunnion matrix 1 inner side, are installed on described blast furnace center cone section trunnion matrix 1 by described mounting groove 5,
And then by loose tool 6 inside the described container cavity of resistance to material, be installed to the inner side of the above-mentioned blast furnace center cone section trunnion matrix 1 that wear-resisting alloy block has been installed, form the taper container cavity of resistance to material that comprises loose tool 6 inside blast furnace center cone section trunnion matrix 1 and the container cavity of resistance to material, and at the large end of the described taper container cavity of resistance to material, opening 8 is set;
C, filling high-abrasive material, infiltration material and treating compound,
First in the described taper container cavity of resistance to material, load high-abrasive material powder 9 tamping by described opening 8,
And then cross section is installed on described opening 8 is funnel shaped container cavity 10, and infiltrate material 11 and appropriate powdery treating compound 12 to filling in appropriate particulate state in described container cavity 10 successively;
D, infiltrate, first by the above-mentioned high-abrasive material powder 9 that is filled with, particulate state infiltrates the blast furnace center cone section trunnion matrix 1 of material 11 and liquid immersion agent 12 and puts into resistance furnace, then start the resistive heater of described resistance furnace, described in inciting somebody to action, be filled with high-abrasive material powder 9, particulate state infiltrates material 11 and blast furnace center cone section trunnion matrix 1 homogeneous heating to 1150 of liquid immersion agent 12 DEG C～1200 DEG C, be incubated at least two hours, make to infiltrate material 11 fusings and fully diffusion infiltrate to loose tool 6 inside matrix 1 and the container cavity of resistance to material, then after below being cooled to 250 DEG C with stove, the outer air cooling of stove forms blast furnace center cone section trunnion blank,
Loose tool inside e, the processing removal container cavity of resistance to material, after described blast furnace center cone section trunnion blank cool to room temperature, loose tool 6 inside the container cavity of resistance to material described in removing by machining equipment again, has so just completed the once work for the treatment of of described blast furnace center cone section trunnion abrasion-proof structure.
By being coated with the abrasion-proof structure 4 being formed by wear-resisting cladding layer 2 and wear-resisting mounting layer 3 on the inner surface at described blast furnace center cone section trunnion matrix 1, and make described wear-resisting cladding layer 2 cover described wear-resisting mounting layer 3 and not install on the inner side-wall of described blast furnace center cone section trunnion matrix 1 of described wear-resisting mounting layer 3.Like this; because described abrasion-proof structure has comprised the wearing layer of two-layer unlike material and structure; thereby described blast furnace center cone section trunnion was in use both made after the long-term frictional wear of wear-resisting cladding layer 2 quilt of outside; still also have wear-resisting mounting layer 3 below described blast furnace center cone section trunnion matrix 1 is protected and be unlikely to scrap at once; so not only improve the fastness to wear of described blast furnace center cone section trunnion, and can effectively extend its work-ing life.Simultaneously, adopt wetting method disclosed by the invention, not only can effectively ensure the thickness of described wear-resisting cladding layer 2, and because infiltrating, described particulate state expects that gap the diffusion that can fill up fully between described wear-resisting alloy block and described mounting groove 5 through heating and thermal insulation infiltrate to matrix and loose tool, the wear-resisting alloy block that forms described wear-resisting mounting layer 3 to improve is connected effect with the infiltration of blast furnace center cone section trunnion matrix 1, thereby after ensureing both to have made outer field wear-resisting cladding layer 2 be worn, the fastness to wear of the wear-resisting mounting layer 3 of internal layer also can not reduce because of coming off, and then make the fastness to wear of described blast furnace center cone section trunnion, obtain more efficiently guarantee work-ing life.
In above-mentioned embodiment, for described treatment process is matched with described blast furnace center cone section throat tubular construction, simultaneously again can more effective raising form the effect of impregnation between wear-resisting alloy block and the described blast furnace center cone section trunnion matrix 1 of described wear-resisting mounting layer 3, simultaneously, improve the wear resistance of described wear-resisting cladding layer 2, in step a, on described blast furnace center cone section trunnion matrix 1 mounting groove 5 of processing being projected as of its vertical section interior large outside little dovetail-indent, in step b, the wear-resisting alloy block being arranged in described mounting groove 5 is the swallow-tail form high rigidity YG11C W-Co kind wear-resisting alloy block suitable with described dovetail-indent, in step c, be WC powdered alloy, i.e. carbon tungsten alloy powder to the high-abrasive material powder 9 loading in the described taper container cavity of resistance to material.
Further, for convenient infiltration operates, improve bonding properties, in step c, infiltrating material 11 to the particulate state of described container cavity 10 interior fillings is manganese-copper particulate material; For fear of in impregnation process, when long-term heat preservation, foreign matter enters in described container cavity 10, quality product after impact infiltrates, top at container cavity 10 described in step c is provided with shrouding 13, described shrouding 13 seals described container cavity 10, is provided with gap communication type exhaust guide on described shrouding; And in order to simplify described gap communication type exhaust guide structure; but can play the effect of protection; described gap communication type exhaust guide comprise vapor pipe 14 and steel ball 15, are processed with V-type groove at the free end of described vapor pipe 14, being placed in described V-type groove of described steel ball 15 activities.
Further, in order to get rid of the air in container cavity, preventing from infiltrating material oxidation under high temperature, in step c, is inorganic oil to the liquid immersion agent 12 of described container cavity 10 interior injections.
Infiltration of the present invention connects, and is two kinds of component that needs are linked together and expects at high temperature to infiltrate and link together by infiltration, as brazing of the prior art, soldering, belongs to class method of attachment.
Claims (10)
1. a blast furnace center cone section trunnion, comprise blast furnace center cone section trunnion matrix (1), it is characterized in that: on the inner surface of described blast furnace center cone section trunnion matrix (1), be coated with the abrasion-proof structure (4) being made up of wear-resisting cladding layer (2) and wear-resisting mounting layer (3), described wear-resisting cladding layer (2) covers described wear-resisting mounting layer (3) and do not install on the inner side-wall of described blast furnace center cone section trunnion matrix (1) of described wear-resisting mounting layer (3).
2. blast furnace center cone section trunnion according to claim 1, it is characterized in that: on the inner side-wall of described blast furnace center cone section trunnion basic (1), be provided with mounting groove (5), described wear-resisting mounting layer (3) is made up of wear-resisting alloy block, and described wear-resisting alloy block is arranged on the inner side-wall of described blast furnace center cone section trunnion matrix (1) by described mounting groove (5).
3. blast furnace center cone section trunnion according to claim 2, is characterized in that: described wear-resisting cladding layer (2) is for fusing at described wear-resisting alloy block and the wear-resistant alloy layer on described blast furnace center cone section trunnion matrix (1) inner side-wall of described wear-resisting mounting layer (3) not being installed by pattern of invasion.
4. according to the blast furnace center cone section trunnion described in claim 2 or 3, it is characterized in that: described mounting groove (5) being projected as in its vertical section interior large outside little dovetail-indent, the wear-resisting alloy block being arranged in described mounting groove (5) is the swallow-tail form wear-resisting alloy block suitable with described dovetail-indent shape, and described swallow-tail form wear-resisting alloy block is infiltrated and is connected with described dovetail-indent by described wear-resisting cladding layer (2).
5. for the treatment process of blast furnace center cone section trunnion abrasion-proof structure described in claim 3, it is characterized in that: comprise the following steps,
A, prepare loose tool (6) inside blast furnace center cone section trunnion matrix (1) and the container cavity of resistance to material,
According to the described blast furnace center cone section trunnion matrix (1) of design paper preparation, and on the inner side-wall of described blast furnace center cone section trunnion matrix (1), prepare the mounting groove (5) that wear-resisting alloy block is installed,
According to the container cavity of resistance to material design paper, preparation shape and described blast furnace center cone section trunnion matrix (1) shape are suitable, and loose tool (6) inside the container cavity of resistance to material of the participation formation container cavity of resistance to material (7);
B, assemble wear-resisting alloy block and assemble the container cavity of resistance to material (7),
First will infiltrate the wear-resisting alloy block of described blast furnace center cone section trunnion matrix (1) inner side, be installed to described blast furnace center cone section trunnion matrix (1) above by described mounting groove (5),
And then loose tool (6) inside the described container cavity of resistance to material is installed to the inner side of the above-mentioned blast furnace center cone section trunnion matrix (1) that wear-resisting alloy block has been installed, form the taper container cavity of resistance to material that comprises loose tool (6) inside blast furnace center cone section trunnion matrix (1) and the container cavity of resistance to material, and at the large end of the described taper container cavity of resistance to material, opening (8) is set;
C, filling high-abrasive material, infiltration material and treating compound,
First in the described taper container cavity of resistance to material, load high-abrasive material powder (9) tamping by described opening (8),
And then be funnel shaped container cavity (10) at the upper installation of described opening (8) cross section, and in described container cavity (10), fill in appropriate particulate state infiltration material (11) and appropriate liquid immersion agent (12) successively;
D, infiltrate, first by the above-mentioned high-abrasive material powder (9) that is filled with, particulate state infiltrates the blast furnace center cone section trunnion matrix (1) of material (11) and liquid immersion agent (12) and puts into resistance furnace, then start the resistive heater of described resistance furnace, described in inciting somebody to action, be filled with high-abrasive material powder (9), particulate state infiltrates blast furnace center cone section trunnion matrix (1) homogeneous heating to 1150 DEG C of material (11) and liquid immersion agent (12)～1200 DEG C, be incubated at least two hours, make to infiltrate material (11) fusing and fully diffusion infiltrate to loose tool (6) inside matrix (1) and the container cavity of resistance to material, then after below being cooled to 250 DEG C with stove, the outer air cooling of stove forms blast furnace center cone section trunnion blank,
Loose tool inside e, the processing removal container cavity of resistance to material, after described blast furnace center cone section trunnion blank cool to room temperature, loose tool (6) inside the container cavity of resistance to material described in removing by machining equipment again, has so just completed the once work for the treatment of of described blast furnace center cone section trunnion abrasion-proof structure.
6. treatment process according to claim 5, it is characterized in that: in step a, the mounting groove (5) of the upper processing of described blast furnace center cone section trunnion matrix (1) being projected as of its vertical section interior large outside little dovetail-indent, in step b, the wear-resisting alloy block being arranged in described mounting groove (5) is the swallow-tail form high rigidity YG11C W-Co kind wear-resisting alloy block suitable with described dovetail-indent.
7. the treatment process for blast furnace center cone section trunnion wearing layer according to claim 5, it is characterized in that: in step c, be WC powdered alloy, i.e. carbon tungsten alloy powder to the high-abrasive material powder (9) loading in the described taper container cavity of resistance to material.
8. the treatment process for blast furnace center cone section trunnion wearing layer according to claim 5, is characterized in that: in step c, infiltrating material (11) to the particulate state of the interior filling of described container cavity (10) is manganese-copper particulate material.
9. according to the treatment process for blast furnace center cone section trunnion wearing layer described in claim 5,6,7 or 8, it is characterized in that: be provided with shrouding (13) on the top of container cavity described in step c (10), described shrouding (13), by described container cavity (10) sealing, is provided with gap communication type exhaust guide on described shrouding (13).
10. the treatment process for blast furnace center cone section trunnion wearing layer according to claim 9, it is characterized in that: described gap communication type exhaust guide comprise vapor pipe (14) and steel ball (15), free end at described vapor pipe (14) is processed with V-type groove, and what described steel ball (15) was movable is placed in described V-type groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188677.2A CN103937920B (en) | 2014-05-06 | 2014-05-06 | The treatment process of blast furnace center cone section trunnion and abrasion-proof structure thereof |
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| CN201410188677.2A CN103937920B (en) | 2014-05-06 | 2014-05-06 | The treatment process of blast furnace center cone section trunnion and abrasion-proof structure thereof |
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| CN103937920B CN103937920B (en) | 2016-03-16 |
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Citations (6)
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|---|---|---|---|---|
| SU256787A1 (en) * | И. М. Елинсон , В. А. бов | FUNNEL OF CONE SHUTTER OF THE LOADING DEVICE | ||
| SU1344780A1 (en) * | 1986-02-03 | 1987-10-15 | Производственное Объединение "Ждановтяжмаш" | Method of preparing cone and bowl for operation |
| RU2086658C1 (en) * | 1995-04-28 | 1997-08-10 | Акционерное общество "Новолипецкий металлургический комбинат" | Blast furnace charge chute |
| CN2518868Y (en) * | 2001-05-24 | 2002-10-30 | 攀枝花钢铁有限责任公司机械制造公司 | Quick-changing combined central throat tube |
| CN2908965Y (en) * | 2006-03-08 | 2007-06-06 | 周卓林 | Wear-resistant material supply pipe |
| CN201670847U (en) * | 2010-04-30 | 2010-12-15 | 武汉钢铁(集团)公司 | Central throat at central part of bell-less top gearbox of blast furnace |
-
2014
- 2014-05-06 CN CN201410188677.2A patent/CN103937920B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU256787A1 (en) * | И. М. Елинсон , В. А. бов | FUNNEL OF CONE SHUTTER OF THE LOADING DEVICE | ||
| SU1344780A1 (en) * | 1986-02-03 | 1987-10-15 | Производственное Объединение "Ждановтяжмаш" | Method of preparing cone and bowl for operation |
| RU2086658C1 (en) * | 1995-04-28 | 1997-08-10 | Акционерное общество "Новолипецкий металлургический комбинат" | Blast furnace charge chute |
| CN2518868Y (en) * | 2001-05-24 | 2002-10-30 | 攀枝花钢铁有限责任公司机械制造公司 | Quick-changing combined central throat tube |
| CN2908965Y (en) * | 2006-03-08 | 2007-06-06 | 周卓林 | Wear-resistant material supply pipe |
| CN201670847U (en) * | 2010-04-30 | 2010-12-15 | 武汉钢铁(集团)公司 | Central throat at central part of bell-less top gearbox of blast furnace |
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| Publication number | Publication date |
|---|---|
| CN103937920B (en) | 2016-03-16 |
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