CN1069349C - Double layer granular fire-retardant nodulizer composition and preparation method thereof - Google Patents
Double layer granular fire-retardant nodulizer composition and preparation method thereof Download PDFInfo
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- CN1069349C CN1069349C CN97105780A CN97105780A CN1069349C CN 1069349 C CN1069349 C CN 1069349C CN 97105780 A CN97105780 A CN 97105780A CN 97105780 A CN97105780 A CN 97105780A CN 1069349 C CN1069349 C CN 1069349C
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- retardant
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Abstract
The present invention relates to a fire-retardant nodulizer used in the production of metallurgy and iron castings, which belongs to the technical field of metallurgy and chemical industry. The fire-retardant nodulizer comprises a base body, a fire-retardant layer and adhesive, wherein the base body comprises 2% to 10% of pure magnesium, or magnesium chloride, 2% to 20% of chlorinating mixed rare earth or mixed rare-earth metal, 0.04% to 0.8% of trace element and ferric silicon as the rest; the fire-retardant layer is formed by mixing any one of halide or compound of alkaline earth metal, graphite and ferric silicon powder or mixing any component according to any proportion; the adhesive comprises phenolic resin or middle-nitrogen resin; the components of the base body are mechanically mixed according to the proportion, and resin is added to be manufactured into granules; the resin is coated outside the granules again, and the fire-retardant layers are wrapped on the outer surfaces of the granules. The nodulizer of the present invention has the advantages of fire-retardant performance, reduced environment pollution and safe production.
Description
The present invention relates to the fire-retardant nodulizer that uses in metallurgical and the iron casting production, belong to the chemical metallurgy technical field.
The CN1065886 patent on November 4th, 92 disclosed " spheroidal graphite cast iron instantaneous dense flow spheroidizing container ", and this patented technology is burnt when implementation process middle-weight rare earths magnesium alloy and molten iron stream converge sometimes, does not reach processing requirement.Widely used rare earth ferrosilicomagnesium nodulizing agent exists the serious environmental pollution to reach operator's Health hazard in preparation process and spheroidizing simultaneously, and the serious waste of the starting material and the energy.These problems are metallurgical and the cast iron industry is sought the difficult problem that solves in recent decades always.
The objective of the invention is to remedy the deficiency of prior art, the environmental pollution that provides a kind of and have flame retardant resistance, can solve in the magnesium-rare earth production process guarantees double layer granular fire-retardant nodulizer composition of safety in production and preparation method thereof.
Composition of the present invention comprises following component: all be weight percentage.
Matrix: pure magnesium or magnesium chloride 2-10%, chlorination mishmetal or norium 2-20%, trace alloying element (comprising bismuth, manganic compound) 0.04-0.8%, surplus is a ferrosilicon.
Matrix is rare earth magnesium ferrosilicon alloy (RE also
7Mg
9).
Flame-retardant layer: the halogenide of alkaline-earth metal or compound, graphite, ferrosilicon powder, one of or the arbitrarily mixing of component arbitrary proportion.Flame-retardant layer thickness 0.5-2mm.
Binding agent: resol or middle nitrogen resin.
Preparation method of the present invention comprises the steps: that a. is with pure magnesium or magnesium chloride, chlorination norium or norium, ferrosilicon, trace alloying element (comprising bismuth, manganic compound) mechanically mixing is in proportion made particle-matrix with 2-5% resene binding agent on tablets press; B. wrapping up one deck flame-retardant layer on its outer surface behind the external application 2-5% resin again on the above-mentioned particle-matrix.Flame-retardant layer is the halogenide or the compound of alkaline-earth metal, graphite, ferrosilicon powder, one of or the arbitrarily mixing of component arbitrary proportion.Flame-retardant layer thickness 0.5-2mm.
Composition of the present invention is a double layer granular.Core is the nodularization element of inflammable easy reaction, and skin is fire-retardant protection component.
Flame-retardant layer has fire retardation to matrix, simultaneously processed molten iron is played purification, desulfurization and promotion nodularization and promotion transformation mutually.Thereby the high save energy of utilization rate of raw materials reduces production costs.According to the purification in iron liquid of the halogenide of different alkaline-earth metal or compound, desulfurization and promotion nodularization with promote the difference between the effects that changes mutually of iron, select its component and proportioning, its foundation is the best nodularization effect and the optimum economic benefit of base iron quality and magnesium iron type.Double layer granular fire-retardant nodulizer composition of the present invention could burn more than later half second at the chance molten iron; The nodulizing grade of handled magnesium iron is all above 2 grades; The nodulizing agent cost that more is apparent that spheroidizing descends more than 40%; The problem that has thoroughly solved simultaneously environmental pollution and saved the starting material and the energy.
Below in conjunction with embodiment the present invention is being further specified.
Embodiment 1.
Component:
Matrix: pure magnesium 9%, chlorination mishmetal 18%, bismuth 0.05%, all the other are ferrosilicon (silicon 75%); Flame-retardant layer: Calcium Fluoride (Fluorspan), graphite, ferrosilicon powder, thickness 1mm; Binding agent: middle nitrogen resin 3%.
Preparation: a. is pure magnesium, the chlorination mishmetal, and bismuth, ferrosilicon, mechanically mixing is made particle-matrix with nitrogen resin glue in 3% on tablets press in proportion; B. on above-mentioned particle-matrix, wrap up one deck flame-retardant layer on its outer surface behind the nitrogen resin in the external application 3% again.Flame-retardant layer is a Calcium Fluoride (Fluorspan), graphite, ferrosilicon powder, one of or the arbitrarily mixing of component arbitrary proportion.Flame-retardant layer thickness 1mm.
Experiment: ferritic spheroidal graphite cast iron
Nodulizing agent add-on 0.6-1.0%, innoculant adding quantity 0.4-0.6%.Nodulizing grade 〉=2 grade, ferrite 〉=80%, tensile strength sigma b 〉=420N/mm
2, δ 5 〉=12%.Conclusion: every technic index is qualified, guarantees safety in production, reduces environmental pollution.
Embodiment 2. is as described in the example 1, and different is:
Component:
Matrix: magnesium chloride 10%%, norium 7%, antimony 0.05%, all the other are ferrosilicon (silicon 75%); Flame-retardant layer: Calcium Fluoride (Fluorspan), graphite, ferrosilicon powder, thickness 1.2mm; Binding agent: middle nitrogen resin 4%.
Embodiment 3. is as described in the example 1, and different is:
Component:
Matrix: pure magnesium 9%, norium 2%, antimony 0.08%, all the other are ferrosilicon (silicon 75%); Flame-retardant layer: Calcium Fluoride (Fluorspan), graphite, ferrosilicon powder, thickness 1.5mm; Binding agent: middle nitrogen resin 3%.
Embodiment 4. is as described in the example 1, and different is:
Component:
Matrix: rare earth magnesium ferrosilicon alloy (RE
7Mg
9); Flame-retardant layer: Calcium Fluoride (Fluorspan), graphite, ferrosilicon powder, thickness 1.8mm; Binding agent: middle nitrogen resin 2%.
Embodiment 5. is as described in the embodiment 1, and different is:
Component:
Matrix: pure magnesium 9%, norium 7%, tin 0.05%, all the other are ferrosilicon (silicon 75%); Flame-retardant layer: Calcium Fluoride (Fluorspan), graphite, ferrosilicon powder, thickness 1.8mm; Binding agent: resol 3%.
Experiment: pearlitic ductile iron
Nodulizing agent add-on 0.6-1.0%, innoculant adding quantity 0.4-0.6%.Nodulizing grade 〉=2 grade, perlite 〉=80%, tensile strength sigma b 〉=620N/mm
2, δ 5 〉=2%.Conclusion: every technic index is qualified, guarantees safety in production, reduces environmental pollution.
Embodiment 6. is as described in the embodiment 5, and different is:
Matrix: magnesium chloride 10%, norium 7%, manganese 0.48%, all the other are ferrosilicon (silicon 75%); Flame-retardant layer: Calcium Fluoride (Fluorspan), graphite, ferrosilicon powder, thickness 1.6mm; Binding agent: middle nitrogen resin 4%.
Embodiment 7. is as described in the embodiment 5, and different is:
Matrix: pure magnesium 8%, norium 8%, titanium 0.06%, all the other are ferrosilicon (silicon 75%); Flame-retardant layer: Calcium Fluoride (Fluorspan), graphite, ferrosilicon powder, thickness 1.7mm; Binding agent: middle nitrogen resin 3%.
Embodiment 8. is as described in the embodiment 5, and different is:
Matrix: rare earth magnesium ferrosilicon alloy (RE
7Mg
9); Flame-retardant layer: Calcium Fluoride (Fluorspan), graphite, ferrosilicon powder, thickness 1.8mm; Binding agent: middle nitrogen resin 2%.
Claims (3)
1. double layer granular fire-retardant nodulizer composition is characterized in that, comprises following component, all is weight percentage:
Matrix: pure magnesium or magnesium chloride 2-10%, chlorination mishmetal or norium 2-20%, trace alloying element comprise bismuth, manganic compound 0.04-0.8%, surplus is a ferrosilicon;
Or rare earth magnesium ferrosilicon alloy RE
7Mg
9
Flame-retardant layer: the halogenide of alkaline-earth metal or compound, graphite, ferrosilicon powder, one of or the arbitrarily mixing of component arbitrary proportion; Flame-retardant layer thickness 0.5-2mm;
Binding agent: resol or middle nitrogen resin.
2. a preparation of compositions method according to claim 1 is characterized in that, comprises the steps:
A. with pure magnesium or magnesium chloride, chlorination norium or norium, ferrosilicon, trace alloying element comprise bismuth, manganic compound in proportion mechanically mixing on tablets press, make particle-matrix with 2-5% resene binding agent;
B. wrapping up one deck flame-retardant layer thickness 0.5-2mm on its outer surface behind the external application 2-5% resin again on the above-mentioned particle-matrix.
3. preparation of compositions method as claimed in claim 2 is characterized in that, flame-retardant layer is the halogenide or the compound of alkaline-earth metal, graphite, ferrosilicon powder, one of or the arbitrarily mixing of component arbitrary proportion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105780A CN1069349C (en) | 1997-04-16 | 1997-04-16 | Double layer granular fire-retardant nodulizer composition and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105780A CN1069349C (en) | 1997-04-16 | 1997-04-16 | Double layer granular fire-retardant nodulizer composition and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1164576A CN1164576A (en) | 1997-11-12 |
| CN1069349C true CN1069349C (en) | 2001-08-08 |
Family
ID=5168083
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97105780A Expired - Fee Related CN1069349C (en) | 1997-04-16 | 1997-04-16 | Double layer granular fire-retardant nodulizer composition and preparation method thereof |
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| Country | Link |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100718854B1 (en) * | 2002-05-24 | 2007-05-16 | 가부시키가이샤 닛폰 쇼쿠바이 | Fire retardant resin composition, method of its production, shaped articles comprising the same, and silica |
| WO2009146573A1 (en) * | 2008-06-02 | 2009-12-10 | 鞍钢股份有限公司 | A composite ball used to precisely control the quantity of the trace element dissolved in the molten steel and the method of producing the composite ball |
| CN113373398B (en) * | 2021-06-24 | 2023-04-28 | 重庆大学 | Flame-retardant magnesium alloy part |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083534A (en) * | 1993-06-09 | 1994-03-09 | 湘潭市铁粉铸造材料厂 | Composite bed low-silicon nodulizer |
| CN1084579A (en) * | 1992-09-22 | 1994-03-30 | 陈�光 | Polycompound nodulizer for nodular cast iron |
-
1997
- 1997-04-16 CN CN97105780A patent/CN1069349C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084579A (en) * | 1992-09-22 | 1994-03-30 | 陈�光 | Polycompound nodulizer for nodular cast iron |
| CN1083534A (en) * | 1993-06-09 | 1994-03-09 | 湘潭市铁粉铸造材料厂 | Composite bed low-silicon nodulizer |
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| Publication number | Publication date |
|---|---|
| CN1164576A (en) | 1997-11-12 |
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Effective date of registration: 20030307 Patentee after: Shandong University Patentee before: You Miao |
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