CN104561432A - Method for producing core part of centrifugal roller by spheroidizing process - Google Patents
Method for producing core part of centrifugal roller by spheroidizing process Download PDFInfo
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- CN104561432A CN104561432A CN201410845335.3A CN201410845335A CN104561432A CN 104561432 A CN104561432 A CN 104561432A CN 201410845335 A CN201410845335 A CN 201410845335A CN 104561432 A CN104561432 A CN 104561432A
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- ladle
- molten iron
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- spheroidizing
- nodularization
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Abstract
The invention discloses a method for producing a core part of a centrifugal roller by a spheroidizing process, and belongs to the field of roller cores. The method comprises the following steps: a, adding raw materials into a smelting furnace for smelting; b, discharging molten iron after reaching a tapping temperature, entering a molten iron ladle, and transferring the molten iron ladle to a side absorption type dust removal station through a crane; c, pouring the molten iron in the ladle into a pouring ladle filled with a spheroidizing agent for spheroidizing; d, performing slagging-off and temperature control on the molten iron in the pouring ladle; e, performing pouring on the roller core, wherein the tapping temperature of the molten iron in the step b is 1,420-1,540 DEG C and the spheroidizing temperature for pouring the molten iron into the pouring ladle in the step c is 1,380-1,510 DEG C. The method for producing the core part of the centrifugal roller reduces production cost, alleviates pollution and meets environmental protection and clean production requirements.
Description
Technical field
The present invention relates to a kind of production method of roll core, especially a kind of roll core producing method adopting ladle-to-ladle spheriodizing technique.
Background technology
Roll is made up of roller core and the roll sheath be enclosed within outside roller core, core of the roll material is spheroidal graphite cast iron, need to carry out spheroidizing to the molten iron without spheroidizing before core of the roll cast, original spheroidizing mode directly enters into after being come out of the stove by molten iron in stove in the hot metal ladle having added nodulizing agent of being sling by overhead traveling crane to carry out spheroidizing.Due to a large amount of flue dust can be produced in the process of spheroidizing, cause environmental pollution, along with cleaner production requirement, do not adopt any dedusting method to carry out spheroidizing not allowed to continue again to produce yet, therefore original spheroidizing mode is used must to install top suction type cleaning apparatus additional above smelting furnace, but the high temperature of smelting furnace and molten iron can bring impact to the work-ing life of top suction type cleaning apparatus, install on factory building top that top suction type cleaning apparatus expense is comparatively large and dust removing effects is bad simultaneously.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of centrifugal roller core nodularization production method, and reduce production cost, decreasing pollution, reaches environmental protection and cleaner production requirement.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
Centrifugal roller core nodularization production method, comprises the following steps:
Step a, adds melting in smelting furnace by raw material;
Step b, molten iron is come out of the stove after reaching tapping temperature and is entered hot metal ladle, hot metal ladle is transferred to side-suction type dust removing station;
Step c, carries out spheroidizing by ladle-to-ladle for the molten iron in the hot metal ladle pouring ladle to being equipped with nodulizing agent;
Steps d, carries out skimming temperature control by the molten iron in pouring ladle;
Step e, carries out the cast of roll core;
In described step b, molten iron tapping temperature is 1420 ~ 1540 DEG C, and in step c, the ladle-to-ladle nodularization temperature to pouring ladle is 1380 ~ 1510 DEG C.
The further improvement of technical solution of the present invention is: ladle-to-ladle flow is 5000 ~ 10000kg/min.
The further improvement of technical solution of the present invention is: described nodulizing agent is rare earth magnesium nodularizer, and chemical composition is: Mg:8% ~ 11%, rare earth: 2% ~ 3%, Si:30% ~ 40%, and all the other are Fe, and nodulizing agent add-on is the 1.0-1.5% of pouring ladle iron water amount.
Owing to have employed technique scheme, the technical progress that the present invention obtains is:
Decant avoids the higher top suction type cleaning apparatus of cost of use, reduces production cost, adopts side-suction type dust removing station to solve dust removal problem, focusing on totally, reaching environmental protection and cleaner production requirement by producing volume of smoke during the process of core liquid iron balling.
By ensureing improving cast iron quality to the state modulator of molten steel tapping temperature, ladle-to-ladle nodularization temperature, ladle-to-ladle flow, adopt rare earth magnesium nodularizer to make molten iron react comparatively steady, nodularization effect is stablized, decreasing pollution.
Embodiment
Below in conjunction with embodiment, the present invention is described in further details:
Embodiment one
Centrifugal roller core nodularization production method, comprises the following steps:
Step a, adds melting in smelting furnace by raw material;
Step b, molten iron is come out of the stove after reaching 1420 DEG C and is entered hot metal ladle, and hot metal ladle is transferred to side-suction type dust removing station through crane;
Step c, molten iron temperature carries out spheroidizing by ladle-to-ladle for molten iron in the hot metal ladle pouring ladle to being equipped with nodulizing agent 1380 DEG C time, ladle-to-ladle iron flow is 5000kg/min, nodulizing agent is rare earth magnesium nodularizer, chemical composition is: Mg:8%, rare earth: 2%, Si:30%, all the other are Fe, and nodulizing agent add-on is 1.0% of iron water amount;
Steps d, by the molten iron drossing temperature control in pouring ladle;
Step e, carries out the cast of roll core.
Embodiment two
Centrifugal roller core nodularization production method, comprises the following steps:
Step a, adds melting in smelting furnace by raw material;
Step b, molten iron is come out of the stove after reaching 1480 DEG C and is entered hot metal ladle, and hot metal ladle is transferred to side-suction type dust removing station through crane;
Step c, molten iron temperature carries out spheroidizing by ladle-to-ladle for molten iron in the hot metal ladle pouring ladle to being equipped with nodulizing agent 1450 DEG C time, ladle-to-ladle iron flow is 7500kg/min, nodulizing agent is rare earth magnesium nodularizer, chemical composition is: Mg:10%, rare earth: 2.5%, Si:35%, all the other are Fe, and nodulizing agent add-on is 1.2% of pouring ladle iron water amount;
Steps d, by the molten iron drossing temperature control in pouring ladle;
Step e, carries out the cast of roll core.
Embodiment three
Centrifugal roller core nodularization production method, comprises the following steps:
Step a, adds melting in smelting furnace by raw material;
Step b, molten iron is come out of the stove after reaching 1540 DEG C and is entered hot metal ladle, and hot metal ladle is transferred to side-suction type dust removing station through crane;
Step c, molten iron temperature carries out spheroidizing by ladle-to-ladle for molten iron in the hot metal ladle pouring ladle to being equipped with nodulizing agent 1510 DEG C time, ladle-to-ladle iron flow is 10000kg/min, nodulizing agent is rare earth magnesium nodularizer, chemical composition is: Mg:11%, rare earth: 3%, Si:40%, all the other are Fe, and nodulizing agent add-on is 1.5% of iron water amount.
Steps d, by the molten iron drossing temperature control in pouring ladle;
Step e, carries out the cast of roll core.
Adopt above step that the molten iron reaching the standard of coming out of the stove is not carried out any process when hot metal ladle transferred to by smelting furnace, to be transferredly to side-suction type dust removing station, carry out spheroidizing again, avoid in the nodularization of smelting furnace place and produce volume of smoke, eliminate at the higher top suction type cleaning apparatus of factory building top installation costs, reduce production cost, side-suction type dust removing station good dedusting effect, can reach environmental protection and cleaner production requirement simultaneously.By ensureing improving cast iron quality to the state modulator of molten steel tapping temperature, ladle-to-ladle nodularization temperature, ladle-to-ladle flow, the rare earth magnesium nodularizer simultaneously adopted makes molten iron react comparatively steady, and nodularization effect is stablized, decreasing pollution.
Claims (3)
1. centrifugal roller core nodularization production method, is characterized in that: comprise the following steps:
Step a, adds melting in smelting furnace by raw material;
Step b, molten iron is come out of the stove after reaching tapping temperature and is entered hot metal ladle, hot metal ladle is transferred to side-suction type dust removing station;
Step c, carries out spheroidizing by ladle-to-ladle for the molten iron in the hot metal ladle pouring ladle to being equipped with nodulizing agent;
Steps d, carries out skimming temperature control by the molten iron in pouring ladle;
Step e, carries out the cast of roll core;
In described step b, molten iron tapping temperature is 1420 ~ 1540 DEG C, and in step c, the ladle-to-ladle nodularization temperature to pouring ladle is 1380 ~ 1510 DEG C.
2. centrifugal roller core nodularization production method according to claim 1, is characterized in that: ladle-to-ladle flow is 5000 ~ 10000kg/min.
3. centrifugal roller core nodularization production method according to claim 1, it is characterized in that: described nodulizing agent is rare earth magnesium nodularizer, chemical composition is: Mg:8% ~ 11%, rare earth: 2% ~ 3%, Si:30% ~ 40%, all the other are Fe, and nodulizing agent add-on is the 1.0-1.5% of pouring ladle iron water amount.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410845335.3A CN104561432B (en) | 2014-12-31 | 2014-12-31 | Centrifugal roller core nodularization production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410845335.3A CN104561432B (en) | 2014-12-31 | 2014-12-31 | Centrifugal roller core nodularization production method |
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| CN104561432A true CN104561432A (en) | 2015-04-29 |
| CN104561432B CN104561432B (en) | 2016-09-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5791859A (en) * | 1980-11-26 | 1982-06-08 | Kubota Ltd | Centrifugal casting of spheroidal graphite casting |
| CN1069074A (en) * | 1992-07-30 | 1993-02-17 | 冶金工业部钢铁研究总院 | Spheroidizing method for centrifugal casting compounded roller |
| CN203030607U (en) * | 2012-11-29 | 2013-07-03 | 江苏恒立高压油缸股份有限公司 | Molten iron nodulizing stokehold dust-removing air collection device |
| CN103556039A (en) * | 2013-10-30 | 2014-02-05 | 青岛良力精铸有限公司 | Preparation method of nodular cast iron of alloy for roll |
-
2014
- 2014-12-31 CN CN201410845335.3A patent/CN104561432B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5791859A (en) * | 1980-11-26 | 1982-06-08 | Kubota Ltd | Centrifugal casting of spheroidal graphite casting |
| CN1069074A (en) * | 1992-07-30 | 1993-02-17 | 冶金工业部钢铁研究总院 | Spheroidizing method for centrifugal casting compounded roller |
| CN203030607U (en) * | 2012-11-29 | 2013-07-03 | 江苏恒立高压油缸股份有限公司 | Molten iron nodulizing stokehold dust-removing air collection device |
| CN103556039A (en) * | 2013-10-30 | 2014-02-05 | 青岛良力精铸有限公司 | Preparation method of nodular cast iron of alloy for roll |
Non-Patent Citations (2)
| Title |
|---|
| 刘云浦 等: "前炉坑内侧吸式除烟尘装置", 《铸造》 * |
| 王健: "意大利的球墨铸铁盖包法处理工艺及装备", 《铸造技术》 * |
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| CN104561432B (en) | 2016-09-07 |
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