CN1044392C - Composite additive for smelting cast iron - Google Patents
Composite additive for smelting cast iron Download PDFInfo
- Publication number
- CN1044392C CN1044392C CN96100887A CN96100887A CN1044392C CN 1044392 C CN1044392 C CN 1044392C CN 96100887 A CN96100887 A CN 96100887A CN 96100887 A CN96100887 A CN 96100887A CN 1044392 C CN1044392 C CN 1044392C
- Authority
- CN
- China
- Prior art keywords
- composite additive
- cast iron
- binding agent
- additive
- ferrosilicon
- 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.)
- Expired - Fee Related
Links
- 239000000654 additive Substances 0.000 title claims abstract description 33
- 230000000996 additive effect Effects 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 13
- 238000003723 Smelting Methods 0.000 title abstract description 6
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims description 17
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 9
- 235000012255 calcium oxide Nutrition 0.000 claims description 8
- 239000000292 calcium oxide Substances 0.000 claims description 8
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 7
- 235000019353 potassium silicate Nutrition 0.000 claims description 7
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 7
- 150000002910 rare earth metals Chemical class 0.000 claims description 7
- 239000003469 silicate cement Substances 0.000 claims description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 13
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 229910052710 silicon Inorganic materials 0.000 abstract description 4
- 239000010703 silicon Substances 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 238000005266 casting Methods 0.000 abstract 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000011572 manganese Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention provides a composite additive for smelting cast iron, which replaces the traditional ferrosilicon alloy additive, and has the functions of increasing silicon, increasing temperature, purifying molten iron, reducing the burning loss of silicon and manganese, being beneficial to reducing the internal defects of a casting blank, improving the microstructure of the cast iron, and obviously improving the tensile strength and the elongation of the cast iron, thereby improving the comprehensive performance of the cast iron.
Description
The present invention relates to the composite additive that a kind of composite additive, particularly cupola melting metal that is used for the cast iron smelting used.
Traditional metal is smelted, particularly use in the technology of cupola melting metal, according to different furnace charges and foundry goods requirement, add certain quantity of additive, by regulating main body composition and content of elements in the molten iron,, obtain good castability through smelting, the metallographic structure that meets the requirements, satisfied mechanical property.Additive commonly used mainly is to be the additive of base-material with the ferro-silicon, and it is lower that this additive life-time service still exposes in the foundry goods spheroidization of graphite rate, and internal defect in cast is wayward, defectives such as mechanical property instability.
The object of the present invention is to provide a kind of composite additive that cast iron is smelted that is used for, its substituted for silicon iron alloy additive plays increase silicon, temperature raising, purifying molten iron, minimizing silicon, manganese scaling loss in melting.Help reducing the strand subsurface defect, improve the cast iron microstructure, the tensile strength and the unit elongation of cast iron all are significantly improved, thereby improve the effect of cast iron over-all properties.
The composite additive that the present invention smelts with dried foundry goods is characterized in that it is is base-material with industrial silicon carbide, allocates commercial-purity aluminium again into, and rare earth ferrosilicomagnesium, ferrosilicon, ferromanganese and binding agent combine, and the weight percent of above-mentioned each component is:
Industry silicon carbide 40-90 ferrosilicon 0.5-3.0
Commercial-purity aluminium 0.1-2.0 ferromanganese 0-3.0
Rare earth ferrosilicomagnesium 0-5 binding agent all the other
The composite additive of forming according to said ratio contains following weight percent element or compound:
SiC?30-80?FC?3-20 Ca?3-1?5 Si?2-15
Al?0-1.5?Mn?0.05-0.3?R?0.05-10 Fe?0.3-1.5
All the other are binding agent.
Above-mentioned FC is a flowable carbide in melting.
Above-mentioned binding agent is by silicate cement, water glass, and unslaked lime combines, and the amount of binding agent should be less than 50% of composite additive weight, and the weight percent of each component of binding agent is:
Silicate cement 55-65 water glass 6-10 unslaked lime 28-35
The composition of each component of above-mentioned composite additive following (weight percent)
Industry silicon carbide: SiC 40-90 FC 5-20 Si+SiO
23-40
Rare earth ferrosilicomagnesium: Si 35-45 R 3-7 Mg 7-9
Mn?2.5-3.5?Cal.5-4?Fe?35-45
Commercial-purity aluminium: 〉=99%
Ferrosilicon: Si 70-80 Mn 0.4-1
Ferromanganese: Mn 65-80 Si 2-5
The composition of each component of above-mentioned binding agent following (weight percent)
Silicate cement 3CaOSiO
245-56
2CaO·SiO
2 20-30
3CaO·Al
2O
3 6-10
4CaO·Al
2O
3·Fe
2O
3 13-17
Water glass Na
2OSiO
2All the other are water for 40-50
Unslaked lime CaO 80-95
Preparation of composite additives method of the present invention is as follows:
With each composition of solid shape in the above-mentioned composite additive, be crushed to desired particle size after, according to the aforementioned proportion mixing and stirring, it is even to add the binding agent restir, is required shape and specification through press molding, after hardening treatment, standby.
Composite additive using method of the present invention is as follows:
As what in the metal smelting process, use, particularly with using in the cupola melting metal, the substitute of former additive ferro-silicon, can partly substitute, also can all substitute, its amount can be by the equal quantities of the amount conversion cost invention composite additive master base element Si of main base element Si in the ferro-silicon element, ratio in former furnace charge and additive is used, and by using in the former feeding sequence input stove, other need not to change, and its amount is the 1.2-3% of furnace charge.
Embodiment 1:
* * factory produces centrifugal pump body in batches, material is HT15-33, with cupola melting cast iron water, its furnace charge is a waste and old ironcasting etc., uses composite additive of the present invention, and each composition weight percent of composite additive is industrial silicon carbide 65%, rare earth ferrosilicomagnesium 3%, aluminium 0.5%, ferrosilicon 2%, ferromanganese 1%, all the other are binding agent, and each composition silicate cement 60% of binding agent, water glass 6%, unslaked lime 34% mix being pressed into 1.5% adding of block body by furnace charge.The cupola melting metal, the working of a furnace is normal, the molten iron of coming out of the stove turns white, clean and bright, flow steadily, hot metal purifying, molten iron temperature be up to 1450-1460 ℃, good fluidity, be beneficial to cast, its pump housing cast qualification rate reaches 92%, than using the ferrosilicon additive to improve 10%.
Embodiment 2:
* * factory produce in batches material be KT 30-6 * foundry goods.Furnace charge is a waste and old foundry goods etc., use composite additive of the present invention, each composition of composite additive, industrial silicon carbide 85%, rare earth ferrosilicomagnesium 3%, aluminium 0.5%, ferrosilicon 1%, ferromanganese 1%, all the other are binding agent, each percentage composition example silicate cement 65% of binding agent, water glass 6%, unslaked lime 29% is pressed into block body after the mixing, 2% weight of pressing furnace charge adds, the melting working of a furnace is with example 1, be cast into foundry goods after, behind heat-treatment of annealing, the foundry goods fracture is velvet-like darkly, crystal grain is fine and closely woven evenly, the microscopic test report, it is spherical that graphite is group, rolls into a ball cotton-shaped distribution, non-directional, graphite is classified as 2 grades, and graphite granule is 3 grades, and its mechanical property can reach KT35-10.
Use compound additive of the present invention and former ferrosilicon additive relatively, protecting Demonstrate,prove under the former combination property prerequisite, energy-conservation, consumption reduction, save cost 20-30%, effect Fruit is obvious, remarkable in economical benefits.
Claims (2)
1. one kind is used for the composite additive that cast iron is smelted, and it is characterized in that it is is base-material with industrial silicon carbide, allocates commercial-purity aluminium into, and rare earth ferrosilicomagnesium, ferrosilicon, ferromanganese and binding agent combine,
The composite additive of above-mentioned requirements is characterized in that the weight percent of various compositions is:
Industry silicon carbide 40-90% ferrosilicon 0.5-5%
Commercial-purity aluminium 0.1-2.0% ferromanganese 0-3%
Rare earth ferrosilicomagnesium 0-5% binding agent all the other
2. according to the composite additive of claim 1, it is characterized in that above-mentioned binding agent by silicate cement, water glass, unslaked lime combine, and it is measured less than 50% of composite additive gross weight,
The binding agent of above-mentioned requirements is characterized in that the weight percent of each composition of binding agent is:
Silicate cement 55-65%
Water glass 6-10%
Unslaked lime 28-35%
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96100887A CN1044392C (en) | 1996-02-05 | 1996-02-05 | Composite additive for smelting cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96100887A CN1044392C (en) | 1996-02-05 | 1996-02-05 | Composite additive for smelting cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1135535A CN1135535A (en) | 1996-11-13 |
| CN1044392C true CN1044392C (en) | 1999-07-28 |
Family
ID=5116789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96100887A Expired - Fee Related CN1044392C (en) | 1996-02-05 | 1996-02-05 | Composite additive for smelting cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044392C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116730729A (en) * | 2022-03-03 | 2023-09-12 | 青岛九鼎铸冶材料有限公司 | Silicon carbide composite material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2847787A1 (en) * | 1978-11-03 | 1980-05-29 | Halbergerhuette Gmbh | Long life inoculant for molten cast iron - contains ferrosilicon, calcium-aluminium silicate(s), silicon carbide, calcium carbide, and prevents formation of white cast iron |
| WO1997026376A1 (en) * | 1996-01-16 | 1997-07-24 | Foseco International Limited | Composition for inoculating low sulphur grey iron |
-
1996
- 1996-02-05 CN CN96100887A patent/CN1044392C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2847787A1 (en) * | 1978-11-03 | 1980-05-29 | Halbergerhuette Gmbh | Long life inoculant for molten cast iron - contains ferrosilicon, calcium-aluminium silicate(s), silicon carbide, calcium carbide, and prevents formation of white cast iron |
| WO1997026376A1 (en) * | 1996-01-16 | 1997-07-24 | Foseco International Limited | Composition for inoculating low sulphur grey iron |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1135535A (en) | 1996-11-13 |
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|---|---|---|---|
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |