CN202658177U - Bottom blowing protection brick structure for converter - Google Patents
Bottom blowing protection brick structure for converter Download PDFInfo
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- CN202658177U CN202658177U CN 201220182804 CN201220182804U CN202658177U CN 202658177 U CN202658177 U CN 202658177U CN 201220182804 CN201220182804 CN 201220182804 CN 201220182804 U CN201220182804 U CN 201220182804U CN 202658177 U CN202658177 U CN 202658177U
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- brick
- protection brick
- layer protection
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Abstract
The utility model relates to a bottom blowing protection brick structure for a converter, and belongs to the technical field of converter equipment. By the structure, the damage of a bottom blowing gas supply element is reduced, and the service life of the bottom blowing gas supply element is prolonged. According to the technical scheme, the structure consists of an upper-layer protection brick, a middle-layer protection brick, a lower-layer protection brick and a multi-layer circular seam tubular gas supply element, wherein the upper-layer protection brick, the middle-layer protection brick and the lower-layer protection brick are connected from top to bottom in sequence; the middle-layer protection brick and the lower-layer protection brick are normally constructed in a furnace bottom fireproof brick; the upper-layer protection brick is higher than a normal furnace bottom; fireproof clay is constructed at the periphery of the upper-layer protection brick to form a hemisphere; and the multi-layer circular seam tubular gas supply element is arranged in middle holes of the upper-layer protection brick, the middle-layer protection brick and the lower-layer protection brick. The structure has the advantages that the structure is simple, high in practicability and stability and relatively low in manufacturing cost, bottom blowing gas permeability can be well improved, and the service life of a bottom blowing brick is prolonged; and the structure is convenient to mount and maintain and does not have any adverse effect on a normal bottom blowing process, and converter production equipment is not required to be rearranged or reconstructed.
Description
Technical field
The utility model relates to a kind of protection tile of converter multilayer circumferential weld tubular type bottom-blowing air feed element, belongs to the converter installation technical field.
Background technology
Bottom-blowing of converter is ripe process for making, has adopted since the Technology of Slag Splashingfor Furnace Maintenance, and furnace life constantly raises, and furnace life generally can both remain to more than 10000 stoves at present, even higher.The benefit that slag splashing brings is obvious to all, but negative impact also clearly, and wherein the most important is exactly the repetitive process that furnace bottom constantly descends and raises, and causes the bottom-blowing air feed element Partial Blocking, or completely loses the effect of bottom blowing.Improve bottom lance life, it is remained to more than 10000 stoves with spattering slag rear converter furnace life, and bring into play good bottom blowing effect, there is no at present any unit and can solve this technical barrier fully.
How to improve the work-ing life of bottom-blowing air feed element, the influence factor that reduces the damage of bottom-blowing air feed element is the important directions of current research.Through a large amount of practices with studies show that the loss mechanism of bottom tuyere mainly contains: (1) bubble impact.Gas enters the molten bath by gas supply element with the form of bubble, when the moment of bubble disengagement element end, the refractory materials around it is had a shock action, claims this phenomenon to be the counterattack of " " bubble.The bottom gas-feeding flow is larger, and response frequency is also higher, and ability is larger, and is also more serious to deteriorating of refractory materials on every side.(2) water hammer corrodes.Bubble disengagement element end the time, cause MOLTEN STEEL FLOW, washing away the refractory materials of component ambient, this manifesting is called " water hammer erosion ".Gas supply flow is larger, and is also just more serious to " the water hammer erosion " of refractory materials.(3) pit melting loss.Because jointly washing away of gas and molten steel forms pit at the component ambient refractory materials, is also referred to as " concave bottom ", pit is darker, and transmission of heat by convection is also poorer, has more aggravated the melting loss of refractory materials.Because the acting in conjunction of above-mentioned phenomenon, gas supply element is destroyed.Improve gas supply element structure of refractory on every side for this reason, strengthen the protection to gas supply element, the erosive velocity of slowing down gas supply element, what then show is extremely important.
The utility model content
Technical problem to be solved in the utility model provides a kind of simple structure, practicality is good, stability is high, long service life, can reduce bottom-blowing air feed element damage, improve the bottom-blowing of converter in the work-ing life of bottom-blowing air feed element and protect brick structure.
The technical scheme that solves the problems of the technologies described above is:
A kind of bottom-blowing of converter protects brick structure, it protects brick, middle level by the upper strata and protects that brick, lower floor protect brick, multilayer circumferential weld tubular type gas supply element forms, the upper strata protects that brick, middle level protect brick, lower floor protects brick and connects successively from top to bottom, brick is protected in the middle level, lower floor protects brick and normally builds by laying bricks or stones in furnace bottom refractory brick, the upper strata is protected brick and is higher than normal furnace bottom, and multilayer circumferential weld tubular type gas supply element is installed in that brick is protected on the upper strata, brick is protected in the middle level and lower floor protects in the interstitial hole of brick.
Above-mentioned bottom-blowing of converter protects brick structure, and described upper strata is protected and built into semisphere by laying bricks or stones by refractory mortar around the brick, magnesia be poured in the upper strata protect brick and multilayer circumferential weld tubular type gas supply element between the slit in.
Above-mentioned bottom-blowing of converter protects brick structure, and described multilayer circumferential weld tubular type gas supply element is bottom blowing gun.
The beneficial effects of the utility model:
Simple structure, practicality is good, stability is high, manufacturing cost is lower, can improve preferably the ventilation property of bottom blowing, prolongs bottom blowing brick work-ing life;
2. installation, easy to maintenance does not need the existing installation of converter production plant is rearranged and transforms, and can not cause any detrimentally affect to normal bottom blowing process.
Description of drawings
Fig. 1 is the utility model structural representation.
Mark is as follows among the figure: the upper strata is protected brick 1, middle level and is protected brick 2, bottom blowing gun 3, lower floor and protect brick 4, furnace shell 5, refractory mortar 6, gas 7.
Embodiment:
The utility model protects brick 1, middle level by the upper strata and protects that brick 2, lower floor protect brick 4, multilayer circumferential weld tubular type gas supply element forms.
Show among the figure that lower floor protects brick 4, middle level and protects brick 2 and normally build by laying bricks or stones at furnace bottom innerly, lower floor protects brick 4 and builds by laying bricks or stones on furnace shell 5, and the middle level is protected brick 2 and built by laying bricks or stones in lower floor and protect on the brick 4.The upper strata is protected brick 1 and is built by laying bricks or stones in the middle level and protect on the brick 2, and the upper strata is protected brick 1 and protected brick 2 gaps with the middle level and be bonded together with refractory mortar 6.The upper strata is protected brick 1 and is higher than normal furnace bottom 80 ~ 90mm, and the upper strata is built into semisphere by laying bricks or stones with refractory mortar 6 around protecting brick 1.
Show among the figure that multilayer circumferential weld tubular type gas supply element is bottom blowing gun 3, bottom blowing gun 3 passes interstitial hole that furnace shell 5 and three layers protect brick supplied gas 7 in the stove, pours into magnesia in slit between brick 1 and the bottom blowing gun 3 is protected on the upper strata.
By the baker process before natural air drying and the converter blow-on, three layers are protected brick and will closely link together.
Behind converter smelting the first stove, begin to spatter slag operation, before spattering slag, add 2-3t lime at furnace bottom, by the cooling effect of lime and stirring, the cooling effect of nitrogen, slag will be attached to the upper strata and protect around the brick 1, and in the smelting process, furnace bottom also can increase certain height gradually afterwards.Because this moment, gas permeable brick exceeded the refractory brick of 80 ~ 90mm all around than other position, it is too fast that this part refractory brick can prevent that in the later lining erosion process of furnace bottom gas permeable brick from descending, and improved like this life-span of bottom blowing.
Claims (3)
1. a bottom-blowing of converter protects brick structure, it is characterized in that: it protects brick (1), middle level by the upper strata and protects that brick (2), lower floor protect brick (4), multilayer circumferential weld tubular type gas supply element forms, the upper strata protects that brick (1), middle level protect brick (2), lower floor protects brick (4) and connects successively from top to bottom, brick (2) is protected in the middle level, lower floor protects brick (4) and normally builds by laying bricks or stones in furnace bottom refractory brick, the upper strata is protected brick (1) and is higher than normal furnace bottom, and multilayer circumferential weld tubular type gas supply element is installed in that brick (1) is protected on the upper strata, brick (2) is protected in the middle level and lower floor protects in the interstitial hole of brick (4).
2. bottom-blowing of converter according to claim 1 protects brick structure, it is characterized in that: described upper strata is protected brick (1) and is built into semisphere by laying bricks or stones by refractory mortar (6) all around, magnesia be poured in the upper strata protect brick (1) and multilayer circumferential weld tubular type gas supply element between the slit in.
3. bottom-blowing of converter according to claim 1 and 2 protects brick structure, it is characterized in that: described multilayer circumferential weld tubular type gas supply element is bottom blowing gun (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220182804 CN202658177U (en) | 2012-04-26 | 2012-04-26 | Bottom blowing protection brick structure for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220182804 CN202658177U (en) | 2012-04-26 | 2012-04-26 | Bottom blowing protection brick structure for converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202658177U true CN202658177U (en) | 2013-01-09 |
Family
ID=47453096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220182804 Expired - Lifetime CN202658177U (en) | 2012-04-26 | 2012-04-26 | Bottom blowing protection brick structure for converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202658177U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105950818A (en) * | 2016-06-17 | 2016-09-21 | 首钢总公司 | Control method for prolonging bottom blowing service life of top-bottom combined blowing converter |
| CN106065426A (en) * | 2016-08-01 | 2016-11-02 | 北京荣诚京冶科技有限公司 | A kind of bottom blowing element supplying oxygen spray powder bottom converter |
| CN107326142A (en) * | 2017-06-23 | 2017-11-07 | 钢铁研究总院 | A kind of bottom-blowing of converter shield brick and its building method and smelting process |
| CN109628687A (en) * | 2018-12-30 | 2019-04-16 | 钢铁研究总院 | A method of preventing converter bottom blowing gas-feeding element tuyere position bleed-out |
-
2012
- 2012-04-26 CN CN 201220182804 patent/CN202658177U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105950818A (en) * | 2016-06-17 | 2016-09-21 | 首钢总公司 | Control method for prolonging bottom blowing service life of top-bottom combined blowing converter |
| CN105950818B (en) * | 2016-06-17 | 2018-01-23 | 首钢总公司 | A kind of control method for improving the top and bottom combined blown converter bottom blowing life-span |
| CN106065426A (en) * | 2016-08-01 | 2016-11-02 | 北京荣诚京冶科技有限公司 | A kind of bottom blowing element supplying oxygen spray powder bottom converter |
| CN106065426B (en) * | 2016-08-01 | 2018-05-29 | 北京荣诚京冶科技有限公司 | A kind of bottom blowing element that oxygen spray powder is supplied for converter bottom |
| CN107326142A (en) * | 2017-06-23 | 2017-11-07 | 钢铁研究总院 | A kind of bottom-blowing of converter shield brick and its building method and smelting process |
| CN107326142B (en) * | 2017-06-23 | 2019-04-26 | 钢铁研究总院 | A kind of bottom-blowing of converter shield brick and its building method and smelting process |
| CN109628687A (en) * | 2018-12-30 | 2019-04-16 | 钢铁研究总院 | A method of preventing converter bottom blowing gas-feeding element tuyere position bleed-out |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 063016 Hebei province Tangshan City Road North Binhe Road, No. 9 Patentee after: River steel Limited by Share Ltd Tangshan branch Address before: 063016 Hebei province Tangshan City Road North Binhe Road, No. 9 Patentee before: Hebei Steel Co., Ltd., Tangshan Branch |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |
|
| CX01 | Expiry of patent term |