CN101579733A - Nozzle structure at bottom of refining furnace and nozzle filling method - Google Patents
Nozzle structure at bottom of refining furnace and nozzle filling method Download PDFInfo
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- CN101579733A CN101579733A CNA2009101424749A CN200910142474A CN101579733A CN 101579733 A CN101579733 A CN 101579733A CN A2009101424749 A CNA2009101424749 A CN A2009101424749A CN 200910142474 A CN200910142474 A CN 200910142474A CN 101579733 A CN101579733 A CN 101579733A
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Abstract
The invention relates to a nozzle structure at the bottom of a refining furnace and a nozzle filling method. The nozzle structure at the bottom of the refining furnace comprises a seating brick, a nozzle brick, refractory lining, a refining furnace base, a plug, a rotatable bracket and a supporting frame, and is characterized in that: the nozzle brick is manufactured by adopting aluminum-carbon refractory material taking resin as bonding agent, and the chamfer angle of the upper mouth of an inner cavity of the nozzle brick is R58mm. The nozzle filling method comprises the following steps: in the situation that the lower mouth of the inner cavity of the nozzle brick is plugged and locked by the plug, cast-iron scrap is filled in the inner cavity of the nozzle brick to the height of 80-120mm and tamped, and then flow guiding sand is filled at the upper layer of the cast-iron scrap to the upper edge of the inner cavity of the nozzle brick and tamped so as to complete the plugging and filling of the nozzle, wherein the flow guiding sand adopts zirconium flow guiding sand. The invention has the advantages that: the aluminum-carbon refractory nozzle brick taking resin as bonding agent can meet the requirement of multi-box casting of the refining furnace, simultaneously the radian at the upper end of the inner cavity of the nozzle brick is changed from R90 to R58, the nozzle is tightly closed in the casting process, and the use of the zirconium flow guiding sand and the improvement of the filling method realize that multi-box casting molten steel of the refining furnace can automatically flow out along with the falling of the flow guiding sand, thus achieving the purpose of automatic casting.
Description
Technical field:
The present invention relates to a kind of refining furnace bottom water mouth structure and mouth of a river fill method, belong to the smelting placing field of steel.
Background technology:
Chinese patent CN1206062C discloses a kind of Multi-box Gating System Of Hot Charging Plug Rod Of Refining Furnace, constitute by lifting stopper rod structure and refining furnace underseal gate structure two parts, the chock plug that makes the hot charging stopper rod with finish many casees of molten steel running gate system after refining furnace underseal gate structure matches.The shortcoming that refining furnace underseal gate structure exists in this patent is: what use at present is high aluminium material sprue brick, its inner chamber (mouth of a river) is shaped as the straight-through shape of loudspeaker, (mouth of a river is suitable for reading) the suitable for reading chamfering that contacts with the chock plug of hot charging stopper rod is R90, prolongation along with refining time, the duration of pouring, top, the high aluminium material mouth of a river and chock plug contact site constantly deteriorate, it is not tight to cause casting nozzle and chock plug to coincide, and produces molten steel diffusing stream cast situation out of control.The R90 mouth of a river and chock plug contact-making surface are big, and it is dumb that stopper rod opens and closes, and has the R90 chamfering big again, and mouth of a river wall is thin, cause damage easilier, thereby also cause the mouth of a river to fit badly, and influence pouring operation.
Adding of the mouth of a river filled method and is to use chromium matter drainage sand to carry out the filling at the mouth of a river in Chinese patent CN1206062C, molten steel injects the concise bag initial stage, chromium matter drainage material sintering, LF stove refining effect through about 1 hour, the sinter layer thickening, sinter layer can not lean on the gravity effect of molten steel and fragmentation, can not realize automatic casting, therefore, in order to prevent the sintering of place, the mouth of a river cold steel of knot and drainage sand, above the mouth of a river, place a block casting iron covering plate, even like this, also there is the heat of 70%-80% need burn the oxygen processing, causes the boiling water mouth time longer, generally need about 5 minutes.Even do not burning under the situation that oxygen can disclose out with hammer drill, the boiling water mouth also needs 2-3 minute.Make that the interior molten steel temperature drop of bag is big, it is more to put cold steel, increases the molten steel smelting cost.So just increased Master Cost.In addition, cast iron flat cooperates imprecision with the mouth of a river, moves out the mouth of a river and needs to fill with drainage sand around it for preventing it, causes the waste of drainage sand again.
Summary of the invention:
The objective of the invention is provides a kind of drainage need not burn that oxygen, molten steel flow out automatically, the boiling water mouth time is short in order to overcome above-mentioned the deficiencies in the prior art, can reduce drainage molten steel amount, reduce the refining furnace bottom water shutoff mouth structure and the mouth of a river fill method of molten steel cost.
At the bottom of refining furnace bottom water mouth structure of the present invention comprises brick cup, nozzle brick, refractory lining, refining furnace, obstruction, rotatable carriage, support, it is characterized in that: nozzle brick employing resin is that the aluminum-carbon refractory material of bond is manufactured, and nozzle brick inner chamber chamfering suitable for reading is R58mm.
The mouth of a river of the present invention fill method is: under the situation of nozzle brick inner chamber end opening by obstruction shutoff and locking, in the nozzle brick inner chamber, fill the high and tamping of cast-iron scrap 80～120mm earlier, fill drainage sand again on the cast-iron scrap upper strata to nozzle brick inner chamber upper edge and tamping, promptly finish the shutoff at the mouth of a river and fill, wherein: drainage sand adopts zirconium matter drainage sand.
The difference of refining furnace bottom water mouth structure is among the present invention and the Chinese patent CN1206062C: the material of nozzle brick is different, nozzle brick inner chamber chamfering difference suitable for reading; The difference of mouth of a river fill method is: the material difference of drainage sand, the packed height difference of cast-iron scrap have also been saved cast iron flat.
Advantage of the present invention is:
Selecting resin for use is that the aluminium carbon of bond does not burn the requirement that nozzle brick can satisfy the many casees cast of refining furnace, radian R90 with nozzle brick inner chamber upper end changes R58 into simultaneously, contact under the good situation with the mouth of a river at chock plug, make stopper rod open and close flexibly, the mouth of a river is closed tightly in the casting process, reduce the mouth of a river and fit badly the stream cast phenomenon of loosing, improve the utilization rate of molten steel.
Along with the change mouth of a river filling mode of drainage sand material has also improved, zirconium matter drainage sand refractoriness height is easy-sintering not, can realize opening iron stops up, drainage sand falls behind molten steel down and falls thereupon, under the situation of drainage smoothly, reduce drainage molten steel amount, simultaneously since its refractoriness height not the characteristic of easy-sintering can on original structure, cut cast iron flat, simultaneously the proportioning of packing material is improved, the loading of cast iron break flour is increased to 80～120mm, and these have all reached the purpose that reduces the molten steel smelting cost.
The present invention is further perfect Multi-box Gating System Of Hot Charging Plug Rod Of Refining Furnace makes the present invention have more operability, has further improved the reliability of system, has more the popularization practical value.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
The specific embodiment:
With reference to accompanying drawing 1, refining furnace bottom water mouth structure of the present invention comprises at the bottom of brick cup 1, nozzle brick 2, refractory lining 4, the refining furnace 5, stop up 7, rotatable carriage 8, support 9, the unfired Al-C sprue brick (is the aluminum-carbon refractory material of bond with the resin) that nozzle brick 2 adopts Mount Taishan, Shanghai refractory material Co., Ltd to produce is manufactured, and nozzle brick inner chamber chamfering suitable for reading is R58mm.
Mouth of a river fill method is: under the situation of nozzle brick inner chamber end opening by obstruction 7 shutoff and locking, in the nozzle brick inner chamber, fill 6 one hundred millimeters high and tampings of cast-iron scrap earlier, fill drainage sand 3 again on cast-iron scrap 6 upper stratas to nozzle brick inner chamber upper edge and tamping, Xixia County, Henan Province good fortune of using drainage sand 3 are full of the zirconium matter drainage sand that metallurgical material Co., Ltd produces, these properties of product are stable, the self-opening rate height.
Result of the test: drainage is smooth.All heat drainages are all very well, need not burn oxygen, and hammer drill flows out molten steel once disclosing, and the drainage molten steel is less, and the mouth of a river is closed tightly.
Claims (2)
1, the structure at the mouth of a river, a kind of refining furnace bottom, at the bottom of comprising brick cup, nozzle brick, refractory lining, refining furnace, obstruction, rotatable carriage, support, it is characterized in that: nozzle brick employing resin is that the aluminum-carbon refractory material of bond is manufactured, and nozzle brick inner chamber chamfering suitable for reading is R58mm.
2, a kind of mouth of a river fill method of refining furnace bottom water mouth structure according to claim 1, it is characterized in that: under the situation of nozzle brick inner chamber end opening by obstruction shutoff and locking, in the nozzle brick inner chamber, fill the high and tamping of cast-iron scrap 80～120mm earlier, fill drainage sand again on the cast-iron scrap upper strata to nozzle brick inner chamber upper edge and tamping, promptly finish the shutoff at the mouth of a river and fill, wherein: drainage sand adopts zirconium matter drainage sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101424749A CN101579733A (en) | 2009-06-11 | 2009-06-11 | Nozzle structure at bottom of refining furnace and nozzle filling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101424749A CN101579733A (en) | 2009-06-11 | 2009-06-11 | Nozzle structure at bottom of refining furnace and nozzle filling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101579733A true CN101579733A (en) | 2009-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101424749A Pending CN101579733A (en) | 2009-06-11 | 2009-06-11 | Nozzle structure at bottom of refining furnace and nozzle filling method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123602A (en) * | 2016-08-19 | 2016-11-16 | 郑州东方安彩耐火材料有限公司 | Production system poured into a mould safely by refractory material |
| CN108405845A (en) * | 2016-11-07 | 2018-08-17 | 中车齐齐哈尔车辆有限公司 | The loading method of stuffing sand is loaded into ladle |
| CN112122585A (en) * | 2020-09-07 | 2020-12-25 | 宁国市宏达电炉有限公司 | Bottom pouring type induction holding furnace |
| CN112743071A (en) * | 2020-12-30 | 2021-05-04 | 湖南华菱湘潭钢铁有限公司 | high-Cr alloy steel drainage sand and use method thereof |
| CN112872347A (en) * | 2021-01-15 | 2021-06-01 | 山东钢铁集团日照有限公司 | Secondary filling process for ladle drainage sand |
| CN114247877A (en) * | 2021-12-03 | 2022-03-29 | 山东莱钢永锋钢铁有限公司 | Device and method for casting of square billet continuous casting tundish |
| CN114273649A (en) * | 2021-12-31 | 2022-04-05 | 北京瑞普同创科技发展有限公司 | Casting process of sizing quick-change tundish |
-
2009
- 2009-06-11 CN CNA2009101424749A patent/CN101579733A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123602A (en) * | 2016-08-19 | 2016-11-16 | 郑州东方安彩耐火材料有限公司 | Production system poured into a mould safely by refractory material |
| CN106123602B (en) * | 2016-08-19 | 2018-02-27 | 郑州东方安彩耐火材料有限公司 | Refractory material pours into a mould safely production system |
| CN108405845A (en) * | 2016-11-07 | 2018-08-17 | 中车齐齐哈尔车辆有限公司 | The loading method of stuffing sand is loaded into ladle |
| CN112122585A (en) * | 2020-09-07 | 2020-12-25 | 宁国市宏达电炉有限公司 | Bottom pouring type induction holding furnace |
| CN112743071A (en) * | 2020-12-30 | 2021-05-04 | 湖南华菱湘潭钢铁有限公司 | high-Cr alloy steel drainage sand and use method thereof |
| CN112872347A (en) * | 2021-01-15 | 2021-06-01 | 山东钢铁集团日照有限公司 | Secondary filling process for ladle drainage sand |
| CN114247877A (en) * | 2021-12-03 | 2022-03-29 | 山东莱钢永锋钢铁有限公司 | Device and method for casting of square billet continuous casting tundish |
| CN114273649A (en) * | 2021-12-31 | 2022-04-05 | 北京瑞普同创科技发展有限公司 | Casting process of sizing quick-change tundish |
| CN114273649B (en) * | 2021-12-31 | 2023-06-02 | 北京瑞普同创科技发展有限公司 | Casting technology of sizing quick-change tundish |
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Open date: 20091118 |