CN102000785A - Covering technology of ladle nodulizer nodulized by pour-over process - Google Patents
Covering technology of ladle nodulizer nodulized by pour-over process Download PDFInfo
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- CN102000785A CN102000785A CN 201010573365 CN201010573365A CN102000785A CN 102000785 A CN102000785 A CN 102000785A CN 201010573365 CN201010573365 CN 201010573365 CN 201010573365 A CN201010573365 A CN 201010573365A CN 102000785 A CN102000785 A CN 102000785A
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- Prior art keywords
- nodulizer
- iron
- evenly
- covering
- technology
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005516 engineering process Methods 0.000 title abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 61
- 229910052742 iron Inorganic materials 0.000 claims abstract description 28
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 11
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims abstract description 8
- 229910004072 SiFe Inorganic materials 0.000 claims abstract description 7
- 239000010451 perlite Substances 0.000 claims abstract description 4
- 235000019362 perlite Nutrition 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 5
- 229910000861 Mg alloy Inorganic materials 0.000 abstract 2
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 2
- 150000002910 rare earth metals Chemical class 0.000 abstract 2
- 238000010924 continuous production Methods 0.000 abstract 1
- UCPIPQZQXIKSGB-UHFFFAOYSA-N [Fe].[Mg].[Fe] Chemical compound [Fe].[Mg].[Fe] UCPIPQZQXIKSGB-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 4
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- NJFMNPFATSYWHB-UHFFFAOYSA-N ac1l9hgr Chemical compound [Fe].[Fe] NJFMNPFATSYWHB-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- YADLKQDEUNZTLC-UHFFFAOYSA-N [Fe].[Ba] Chemical compound [Fe].[Ba] YADLKQDEUNZTLC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a covering technology of a ladle nodulizer nodulized by a pour-over process, by which the problems of over-fast reaction in advance and low absorptivity for the nodulizer are overcome. The technology comprises the following steps: evenly laying a nodulizer containing rare-earth ferrosilicon-magnesium alloy in the pit on the left side of a preheated nodulizing ladle dike; evenly covering ferrosilicon powder containing 75% of SiFe on the nodulizer of rare-earth ferrosilicon-magnesium alloy; evenly covering nodular cast iron chips on the ferrosilicon powder containing the 75% of SiFe; compacting with a flat rammer; evenly covering casting perlite on the nodular cast iron chips; and pouring molten iron from the right side of the dike. By using the technology, the nodulizer can react smoothly in abundant molten iron, thereby overcoming the problems of early superheating reaction and low absorptivity of the nodulizer. The technology is simple to operate and can be used for continuous production, and the quality of nodular cast iron is stable.
Description
Technical field
The present invention relates to the magnesium iron casting technique, especially pour the covering process of nodulizer in the method nodularization bag.
Background technology
Magnesium iron casting at present adopts furnace cupola or electric furnace to carry out the furnace charge melting, and the covering process that pours nodulizer in the method nodularization bag is the operation of a particular importance.The covering process that pours nodulizer in the method nodularization bag has various ways, what have covers with rice-straw ash, what have covers with the straw ash, what have covers with iron filings, the grey iron plate of the usefulness that has covers, and above-mentioned several method makes nodulizer cross fast response or the strong reaction of floating urgency in advance because coverage effect is bad, absorptivity is low, causes the unstable or failure of nodularization quality.
Summary of the invention
The invention provides a kind of covering process that pours nodulizer in the method nodularization bag, overcome nodulizer and crossed fast response and the low problem of absorptivity in advance.
The technical solution adopted for the present invention to solve the technical problems is: the nodulizer of even lay RE-Mg-ferrosilicon alloy composition in the pit of the spheroidising bag dykes and dams left side of preheating, evenly covering composition on the nodulizer of RE-Mg-ferrosilicon alloy composition is the ferro-silicon alloy powder of 75%SiFe, on being the ferro-silicon alloy powder of 75%SiFe, composition evenly covers behind the spheroidal graphite cast-iron iron filings with the compacting of tack sand rammer, perlite is used in even covering casting on the spheroidal graphite cast-iron iron filings, and molten iron pours from the right side of dykes and dams.
Evenly the spheroidal graphite cast-iron iron filings that cover are identical with the weight of the nodulizer of RE-Mg-ferrosilicon alloy composition, evenly cover the back and add 0.04 kg/cm with the tack sand rammer
2The pressure compacting.
Evenly the casting that covers is 1 centimetre with perlitic thickness.
The invention has the beneficial effects as follows: use the covering process that originally pours nodulizer in the method nodularization bag, make nodulizer smooth reaction in more molten iron (near the molten iron of 2/3 nodularization amount), overcome nodulizer and crossed thermal response and the low problem of absorptivity in advance.Nodulizer absorptivity 35-45%, nodularization rate 1-2 level, the graphite diameter reaches the 8-7 level, and the magnesium iron steady quality is simple to operate, can produce continuously.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is vertical section structure figure of the present invention
Among the figure 1, nodulizer, 2, ferrosilicon powder, 3, the magnesium iron iron filings, 4, poly-slag agent, 5, the nodularization bag, 6, dykes and dams, 7, molten iron pours direction.
The specific embodiment
Accompanying drawing is 600 kilograms of molten iron of a spheroidising, the covering process profilograph of nodulizer in the method that the pours nodularization bag of casting QT500-7.Even lay nodulizer is (1) 7.8 kilogram in the pit of nodularization bag (5) dykes and dams (6) left side of 700 ℃ of preheatings, and the code name of nodulizer (1) is QRMg8RE7, and the granularity of nodulizer (1) is the 20-30 millimeter, is to add by 1.3% of nodularization weight of molten iron.Evenly cover (2) 2.6 kilograms of ferrosilicon powders on nodulizer (1), the code name of ferrosilicon powder (2) is that (75%SiFe, the granularity of ferrosilicon powder (2) is to add by 1/3 of nodulizer weight less than 4 millimeters.Magnesium iron iron filings (3) of 7.8 kilograms of even coverings on ferrosilicon powder (2), and add the compacting of 0.04 kilogram/cm2 pressure with the tack sand rammer, the poly-slag agent (4) that evenly covers 1 cm thick on magnesium iron iron filings (3) is just cast and is used perlite.(7) 400 kilograms of right side pits from nodularization bag (5) dykes and dams (6) of melted molten iron are poured.Molten iron (7) is 2/3 of 600 kilograms of total nodularization amounts.Before magnesium iron iron filings (3) also do not melt, poly-slag agent (4) is bonded in one to the magnesium iron iron filings (3) that there are not fusing and forms a lid, nodulizer (1) can not be reacted, when pouring molten iron (7) near 400 kilograms, because the interior molten iron of nodularization bag (5) is many, the temperature height, make magnesium iron iron filings (3) fusing, the covering effect of magnesium iron iron filings (3) and poly-slag agent (4) disappears, nodulizer (1) smooth reaction in the molten iron (7) of 300-400 kilogram, reaction time 25-35 second, nodulizer (1) absorptivity 35-45%.Nodulizer (1) reaction finishes, and it is even to stir molten iron with iron staff, skims, and pours 200 kilograms of 1/3 molten iron that account for total nodularization amount again.Next step carries out ferrosilicon according to technological requirement and barium iron composite inoculant breeds, and it is even to stir molten iron with iron staff, does the test wedge inspection, and nodularization qualified back cast has been watered molten iron in 20 minutes.Magnesium iron iron filings (3) be the foundry goods of magnesium iron material through car, mill, iron filings that machining process such as brill produces.
Claims (3)
1. the covering process of nodulizer in the spheroidising bag, it is characterized in that: the nodulizer of even lay RE-Mg-ferrosilicon alloy composition in the pit of the spheroidising bag dykes and dams left side of preheating, evenly covering composition on the nodulizer of RE-Mg-ferrosilicon alloy composition is the ferro-silicon alloy powder of 75%SiFe, on being the ferro-silicon alloy powder of 75%SiFe, composition evenly covers behind the spheroidal graphite cast-iron iron filings with the compacting of tack sand rammer, perlite is used in even covering casting on the spheroidal graphite cast-iron iron filings, and molten iron pours from the right side of dykes and dams.
2. the covering process of nodulizer in the spheroidising bag according to claim 1 is characterized in that: evenly the spheroidal graphite cast-iron iron filings that cover are identical with the weight of the nodulizer of RE-Mg-ferrosilicon alloy composition, evenly cover the back and add 0.04 kg/cm with the tack sand rammer
2The pressure compacting.
3. the covering process of nodulizer in the spheroidising bag according to claim 1 is characterized in that: evenly the casting that covers is 1 centimetre with perlitic thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010573365 CN102000785A (en) | 2010-11-30 | 2010-11-30 | Covering technology of ladle nodulizer nodulized by pour-over process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010573365 CN102000785A (en) | 2010-11-30 | 2010-11-30 | Covering technology of ladle nodulizer nodulized by pour-over process |
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| Publication Number | Publication Date |
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| CN102000785A true CN102000785A (en) | 2011-04-06 |
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| CN 201010573365 Pending CN102000785A (en) | 2010-11-30 | 2010-11-30 | Covering technology of ladle nodulizer nodulized by pour-over process |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220540A (en) * | 2011-06-13 | 2011-10-19 | 江铃汽车股份有限公司 | Spheroidizing treatment technology by rush-in method |
| CN102337446A (en) * | 2011-11-03 | 2012-02-01 | 广西玉林玉柴机器配件制造有限公司 | Bagging process for spheroidizing |
| CN102732664A (en) * | 2012-07-17 | 2012-10-17 | 长沙金龙铸造实业有限公司 | Ductile cast iron production method and production device |
| CN102974777A (en) * | 2012-12-17 | 2013-03-20 | 沈阳机床银丰铸造有限公司 | Hot ladle spheroidizing process |
| CN103008574A (en) * | 2012-12-31 | 2013-04-03 | 东风汽车股份有限公司 | Cover plate and method for preventing poor spheroidization of nodular cast iron |
| CN104985142A (en) * | 2015-07-09 | 2015-10-21 | 西峡县众德汽车部件有限公司 | High-nickel austenite nodular cast iron spheroidizing method and spheroidizing ladle |
| CN105401051A (en) * | 2015-12-25 | 2016-03-16 | 淄博柴油机总公司 | Evanescent mode nodular cast iron ladle-to-ladle spheroidizing inoculation process and spheroidizing tundish thereof |
| CN106513650A (en) * | 2016-11-28 | 2017-03-22 | 西峡县西泵特种铸造有限公司 | Ladle pressing technology capable of preventing nodulizing agent from sticking to ladle |
| CN108300830A (en) * | 2018-01-08 | 2018-07-20 | 湖南精量重工科技有限公司 | A kind of nodularization of spheroidal graphite cast-iron and inoculated technology |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2255737A (en) * | 1991-05-16 | 1992-11-18 | Striview Dev Ltd | A casting process for producing nodular iron castings |
| JPH0841517A (en) * | 1994-07-25 | 1996-02-13 | Daihatsu Kinzoku Kogyo Kk | Production of spheroidal graphite cast iron and graphite spheroidizing auxiliary tool |
| CN1125264A (en) * | 1994-12-19 | 1996-06-26 | 王希太 | Nodular graphite cast iron spheroidization process for reducing fire loss and saving alloy |
| JPH09111327A (en) * | 1995-10-19 | 1997-04-28 | Aichi Mach Ind Co Ltd | Production of thin ductile casting by addition of bismuth |
| CN101773989A (en) * | 2010-01-29 | 2010-07-14 | 迁安市津唐球墨铸管有限公司 | Process for producing ductile cast iron by short-flow melting and sodium silicate sand molding |
| CN101892415A (en) * | 2010-07-19 | 2010-11-24 | 西安合力汽车配件有限公司 | A method of producing castings by using scrap iron scraps and scrap steel |
-
2010
- 2010-11-30 CN CN 201010573365 patent/CN102000785A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2255737A (en) * | 1991-05-16 | 1992-11-18 | Striview Dev Ltd | A casting process for producing nodular iron castings |
| JPH0841517A (en) * | 1994-07-25 | 1996-02-13 | Daihatsu Kinzoku Kogyo Kk | Production of spheroidal graphite cast iron and graphite spheroidizing auxiliary tool |
| CN1125264A (en) * | 1994-12-19 | 1996-06-26 | 王希太 | Nodular graphite cast iron spheroidization process for reducing fire loss and saving alloy |
| JPH09111327A (en) * | 1995-10-19 | 1997-04-28 | Aichi Mach Ind Co Ltd | Production of thin ductile casting by addition of bismuth |
| CN101773989A (en) * | 2010-01-29 | 2010-07-14 | 迁安市津唐球墨铸管有限公司 | Process for producing ductile cast iron by short-flow melting and sodium silicate sand molding |
| CN101892415A (en) * | 2010-07-19 | 2010-11-24 | 西安合力汽车配件有限公司 | A method of producing castings by using scrap iron scraps and scrap steel |
Non-Patent Citations (2)
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220540A (en) * | 2011-06-13 | 2011-10-19 | 江铃汽车股份有限公司 | Spheroidizing treatment technology by rush-in method |
| CN102337446A (en) * | 2011-11-03 | 2012-02-01 | 广西玉林玉柴机器配件制造有限公司 | Bagging process for spheroidizing |
| CN102732664A (en) * | 2012-07-17 | 2012-10-17 | 长沙金龙铸造实业有限公司 | Ductile cast iron production method and production device |
| CN102974777A (en) * | 2012-12-17 | 2013-03-20 | 沈阳机床银丰铸造有限公司 | Hot ladle spheroidizing process |
| CN103008574A (en) * | 2012-12-31 | 2013-04-03 | 东风汽车股份有限公司 | Cover plate and method for preventing poor spheroidization of nodular cast iron |
| CN103008574B (en) * | 2012-12-31 | 2015-07-08 | 东风汽车股份有限公司 | Cover plate and method for preventing poor spheroidization of nodular cast iron |
| CN104985142A (en) * | 2015-07-09 | 2015-10-21 | 西峡县众德汽车部件有限公司 | High-nickel austenite nodular cast iron spheroidizing method and spheroidizing ladle |
| CN105401051A (en) * | 2015-12-25 | 2016-03-16 | 淄博柴油机总公司 | Evanescent mode nodular cast iron ladle-to-ladle spheroidizing inoculation process and spheroidizing tundish thereof |
| CN106513650A (en) * | 2016-11-28 | 2017-03-22 | 西峡县西泵特种铸造有限公司 | Ladle pressing technology capable of preventing nodulizing agent from sticking to ladle |
| CN108300830A (en) * | 2018-01-08 | 2018-07-20 | 湖南精量重工科技有限公司 | A kind of nodularization of spheroidal graphite cast-iron and inoculated technology |
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Application publication date: 20110406 |