CN1083534A - Composite bed low-silicon nodulizer - Google Patents
Composite bed low-silicon nodulizer Download PDFInfo
- Publication number
- CN1083534A CN1083534A CN 93111444 CN93111444A CN1083534A CN 1083534 A CN1083534 A CN 1083534A CN 93111444 CN93111444 CN 93111444 CN 93111444 A CN93111444 A CN 93111444A CN 1083534 A CN1083534 A CN 1083534A
- Authority
- CN
- China
- Prior art keywords
- powder
- silicon
- nodulizing agent
- passivation layer
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 16
- 239000010703 silicon Substances 0.000 title claims abstract description 16
- 239000002131 composite material Substances 0.000 title claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 238000002161 passivation Methods 0.000 claims abstract description 20
- 238000000748 compression moulding Methods 0.000 claims abstract description 11
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 3
- 239000004615 ingredient Substances 0.000 claims abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 21
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 8
- 150000002910 rare earth metals Chemical class 0.000 claims description 7
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 229910000805 Pig iron Inorganic materials 0.000 abstract description 3
- 239000000470 constituent Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A kind of composite bed low-silicon nodulizer, its structure is made up of surface passivation layer and internal layer nodulizing agent, and contained chemical ingredients of upper layer and internal layer and content ratio are inequality, adopt the reinforced whole again compression moulding of layering.It has that cost is low, constituent content is accurate, easy to use, safe, relax the requirement of user to the pig iron, help the user and improve the spheroidal graphite cast iron quality, make nodulizing agent when it is suitable for producing spheroidal graphite cast iron and use.
Description
The present invention relates to the composite bed low-silicon nodulizer that a kind of spheroidal graphite cast iron is used.
The nodulizing agent that the spheroidal graphite cast iron of tradition use is at present used is a rare earth magnesium nodularizer, it is owing to adopting the silicothermic process refining to get, energy consumption is big, silicon content height in the inoculant alloy, it is many to increase silicon after nodularization in the molten iron, and it is higher to be directed at the whole silicon amount of molten iron, make and melt down magnesium iron and can not use again, production cost increases, and at the product that requires to produce as-cast pearlitic ductile iron and the strict control of whole silicon amount, is difficult to use.The content fluctuation range of product middle-weight rare earths and magnesium is big in addition, is difficult to control the spheroidal graphite cast iron quality.Magnesium-rare earth nodulizing agent description is single in addition, is difficult to satisfy the requirement of different user.
The object of the present invention is to provide a kind of low-silicon nodulizer of using the lamination layer structure of compression moulding.
Task of the present invention realizes with following mode: the internal layer nodulizing agent of this nodulizing agent is to be surrounded by surface passivation layer.Surface passivation layer is different with content ratio with the contained Chemical Composition of internal layer nodulizing agent.Behind surface passivation layer rare earth silicon iron powder, iron powder, the silicocalcium powder uniform mixing, compression moulding.After the internal layer nodulizing agent adopts magnesium powder, rare earth silicon iron powder, iron powder, silicocalcium powder uniform mixing, compression moulding.Nodulizing agent reinforced powder before compression moulding adopts internal layer nodulizing agent raw material powder mix and top layer passivation layer raw material powder mix reinforced with the layering charging process.
Without high melt and fragmentation, and adopt compression moulding technology when composite bed low-silicon nodulizer is made, each chemical element particularly magnesium does not have scaling loss, no deviation, and content is accurate.And can do to adjust arbitrarily to each element according to customer requirements.The product particle uniformity helps the spheroidizing and the stable nodularization quality of molten iron.The nodulizing agent silicon content is at 8%-12%, thereby can not be subjected to the higher restriction of silicone content in the base iron, adopts and strengthens inoculated technology, thereby improve the nodularization rate, improves impelling strength, yield strength and unit elongation.Produce magnesium iron factory and can make full use of foundry return again, reduce production costs, can use the high trade mark pig iron, relax requirement the pig iron.Because there is one deck passivation layer on the nodulizing agent top layer, the burst time postpones about 15 seconds during use, thereby the magnesium of nodulizing agent specific absorption height in molten iron, the decaying spheroidisation time ratio prolongs 20% with the component content alloy nodulizer, and it also has low, safe in utilization, the characteristics easily of cost.Making nodulizing agent when it is suitable for producing spheroidal graphite cast iron uses.
Below the present invention is described in further detail: used raw material composition and the content of this nodulizing agent internal layer nodulizing agent and surface passivation layer is inequality.In surface passivation layer, do not use the magnesium powder raw material, and the internal layer nodulizing agent need adopt the magnesium powder.After two kinds of raw material powder mixs mix respectively, when batch turning powder entrance pressure mould, should consider that the top layer is the passivation layer that does not contain the magnesium powder, feed in raw material and carry out, promptly add the surface passivation layer compound earlier, be placed on the underlying material with a special-purpose circular hollow tube again in the pressing mold bottom surface with the layering charging process, in pore, pour the internal layer compound into, outside tube wall, pour the surface passivation layer compound into, extract circular hollow tube out, add layer of surface passivation layer compound at upper surface again.After feeding in raw material in this way before the compression moulding, get final product compression moulding,, can pack and dispatch from the factory through qualified to inspection after construction.
The various material rates of this nodulizing agent can adjust according to customer requirements, are example with QFeSi12Re3 below, and its material composition is:
Surface passivation layer raw material weight per-cent: rare earth silicon iron powder 15%～20%, iron powder 67%～77%, silicocalcium powder 5%～8%, solubility promoter 1%～2%, binding agent 1%, fire retardant 1%～2%.About 1 millimeter of passivation layer thickness
Internal layer nodulizing agent raw-material weight per-cent: pure magnesium powder 8%～11%, rare earth silicon iron powder 15%～20%, silicocalcium powder: 5%～8%, iron powder 57%～69%, fusing assistant 1%～2%, binding agent 1%, fire retardant 1%～2%.
Solubility promoter is selected for use calcium chloride, and binding agent selects for use paraffin wax, fire retardant to select clay for use.
During use, this nodulizing agent is put into iron ladle earlier, pour molten iron again into, because the nodulizing agent surface passivation layer does not contain the magnesium powder, so will treat that passivation layer melts in molten iron after, the magnesium powder of internal layer nodulizing agent just begins directly to contact with molten iron, this moment, molten iron was many, the combustion of magnesium is decreased less, helps nodularization and improves molten steel quality.
Claims (5)
1, the composite bed low-silicon nodulizer used of a kind of spheroidal graphite cast iron is characterized in that the internal layer nodulizing agent is to be surrounded by surface passivation layer.
2,, it is characterized in that surface passivation layer and the contained chemical ingredients of internal layer nodulizing agent and content ratio are inequality according to the described low-silicon nodulizer of claim 1.
3,, it is characterized in that surface passivation layer with behind the rare earth silicon iron powder, iron powder, silicocalcium powder uniform mixing, compression moulding according to the described low-silicon nodulizer of claim 1.
4, according to the described low-silicon nodulizer of claim 1, it is characterized in that the internal layer nodulizing agent adopts magnesium powder, rare earth silicon iron powder, iron powder, silicocalcium powder evenly to be combined after, compression moulding.
5,, it is characterized in that nodulizing agent reinforced powder before compression moulding adopts internal layer nodulizing agent raw material powder mix and the top layer passivation layer raw material powder mix reinforced powder of layering charging process according to claim 1 or 2 described low-silicon nodulizers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111444 CN1083534A (en) | 1993-06-09 | 1993-06-09 | Composite bed low-silicon nodulizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111444 CN1083534A (en) | 1993-06-09 | 1993-06-09 | Composite bed low-silicon nodulizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1083534A true CN1083534A (en) | 1994-03-09 |
Family
ID=4989227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93111444 Pending CN1083534A (en) | 1993-06-09 | 1993-06-09 | Composite bed low-silicon nodulizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1083534A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069349C (en) * | 1997-04-16 | 2001-08-08 | 由淼 | Double layer granular fire-retardant nodulizer composition and preparation method thereof |
| CN100513586C (en) * | 2007-07-04 | 2009-07-15 | 芜湖新兴铸管有限责任公司 | Production process and device of nodular cast iron pipe |
| CN109957633A (en) * | 2019-03-21 | 2019-07-02 | 南京镝峰复合材料有限公司 | Nodulizer with protective film |
| CN119870375A (en) * | 2025-03-26 | 2025-04-25 | 安徽合力股份有限公司合肥铸锻厂 | Sulfur seepage prevention coating for resin sand casting surface and coating method |
-
1993
- 1993-06-09 CN CN 93111444 patent/CN1083534A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069349C (en) * | 1997-04-16 | 2001-08-08 | 由淼 | Double layer granular fire-retardant nodulizer composition and preparation method thereof |
| CN100513586C (en) * | 2007-07-04 | 2009-07-15 | 芜湖新兴铸管有限责任公司 | Production process and device of nodular cast iron pipe |
| CN109957633A (en) * | 2019-03-21 | 2019-07-02 | 南京镝峰复合材料有限公司 | Nodulizer with protective film |
| CN119870375A (en) * | 2025-03-26 | 2025-04-25 | 安徽合力股份有限公司合肥铸锻厂 | Sulfur seepage prevention coating for resin sand casting surface and coating method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |