CN106513562A - Molding sand powder and processing production method thereof - Google Patents
Molding sand powder and processing production method thereof Download PDFInfo
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- CN106513562A CN106513562A CN201610275898.2A CN201610275898A CN106513562A CN 106513562 A CN106513562 A CN 106513562A CN 201610275898 A CN201610275898 A CN 201610275898A CN 106513562 A CN106513562 A CN 106513562A
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- powder
- molding sand
- mesh sieve
- sieve holes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
Abstract
The invention relates to molding sand powder. The molding sand powder is prepared from the following raw materials by weight percent: 70% to 75% of sodium bentonite, 19% to 25% of clean coal powder, 2% to 5% of alpha-starch and 2% to 5% of lustrous carbon. A processing production method of the molding sand powder comprises the steps of 1) puffing corn flour or sweet potato flour into alpha-starch; 2) carrying out high-temperature acidification on the alpha-starch obtained in the step 1), and grinding the alpha-starch subjected to high-temperature acidification into dextrin powder; 3) carrying out oxygen-free firing on a high-carbon material, grinding the high-carbon material subjected to oxygen-free firing, and removing aromatic hydrocarbon, so as to obtain lustrous carbon; and 4) fully stirring dextrin powder obtained in the step 2), lustrous carbon obtained in the step 3) with sodium bentonite and clean coal powder through a dry powder stirring machine, so as to obtain the molding sand powder. The molding sand powder has the beneficial effects that the molding sand powder can completely replace coal powder and argil in traditional wet molding sand and is nontoxic, flavourless and pollution-free, the operation is simple, and casting defects like casting sand bonding, sand holes and pores are effectively prevented.
Description
Technical field
The present invention relates to foundary industry field, more particularly to a kind of molding sand powder and its method for producing.
Background technology
Molding sand powder is the material in casting for moulding, and commonly used molding sand powder typically mixed according to a certain percentage by Modeling Materials such as Foundry sand, moulding sand binder and additional things；The quality of molding sand powder has vital impact to the quality of the foundry goods of Foundry Production, and conventional cast molding sand powder and its method for producing have following defect：（1）Toxic gas easily being produced in foundry production and there is penetrating odor, impact workman's is healthy and safe；（2）Material usage is big, and cost is high；（3）Operation and producing process are complicated；（4）Foundry goods is susceptible to the casting flaws such as scab, sand holes, pore.
The content of the invention
The technical problem to be solved is：A kind of molding sand powder and its method for producing are provided, solve the problems, such as that common sand powder is of poor quality, addition is more, pollution is big and its method for producing complicated, high labor intensive.
The present invention is by solving the problems, such as that the technical scheme for adopting set forth above is：
A kind of molding sand powder, is made up of the raw material of following percentage by weight：Sodium bentonite 70-75%, fine coal powder 19-25%, alphalise starch 2-5%, bright carbon 2-5%.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
A kind of method for producing of molding sand powder as claimed in claim 1, comprises the steps：
1）Semen Maydis powder or tapioca flour are carried out into high temperature extrusion expanding treatment through bulking equipment alphalise starch is obtained, wherein described high temperature extrusion temperature is 200 ~ 260 DEG C；
2）By above-mentioned steps 1）In obtained alphalise starch Jing it is high temperature acidified and grind dextrine powder is obtained；
3）200 ~ 350 DEG C of anaerobic calcinations of high-carbon material Jing being decomposed and being ground, while removing aromatic hydrocarbon obtains the bright carbon that purity is not less than 60%, and softening temperature is improved to 200 ~ 600 DEG C, the temperature of high-carbon material release gas is 200 ~ 880 DEG C；
4）By above-mentioned steps 2）In obtained dextrine powder, above-mentioned steps 3）In obtained light carbon be thoroughly mixed 45 ~ 50min with sodium bentonite, fine coal powder Jing powder stirrers this molding sand powder be obtained.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
The use technique of the present invention：When facing sand fresh sand addition is less than 20%, addition 3-5%, system sand technique, when fresh sand addition is less than 15%, after normal circulation use, addition is less than 1%.
The beneficial effects of the present invention is：1st, this product can substitute coal dust in conventional wet molding sand, potter's clay completely, and nontoxic, tasteless, pollution-free.2nd, addition is few, reduces the processing cost of foundry goods.3rd, it is simple to operate, and effectively prevent the formation of the casting flaws such as foundry goods scab, sand holes, pore.4th, while reducing dust pollution, reduce labor intensity, improve molding sand performance, reduce material cost, improve foundry goods fineness.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1：
The molding sand powder, is made up of the raw material of following percentage by weight：Sodium bentonite 70%, fine coal powder 20%, alphalise starch 2%, bright carbon 2%.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
A kind of method for producing of molding sand powder as claimed in claim 1, comprises the steps：
1）Semen Maydis powder or tapioca flour are carried out into high temperature extrusion expanding treatment through bulking equipment alphalise starch is obtained, wherein described high temperature extrusion temperature is 200 DEG C；
2）By above-mentioned steps 1）In obtained alphalise starch Jing it is high temperature acidified and grind dextrine powder is obtained；
3）210 DEG C of anaerobic calcinations of high-carbon material Jing being decomposed and being ground, while removing aromatic hydrocarbon obtains the bright carbon that purity is not less than 60%, and softening temperature is improved to 200 DEG C, the temperature of high-carbon material release gas is 300 DEG C；
4）By above-mentioned steps 2）In obtained dextrine powder, above-mentioned steps 3）In obtained light carbon be thoroughly mixed 45min with sodium bentonite, fine coal powder Jing powder stirrers this molding sand powder be obtained.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
The use technique of the present invention：When facing sand fresh sand addition is less than 20%, addition 3%, system sand technique, when fresh sand addition is less than 15%, after normal circulation use, addition is less than 1%.
Embodiment 2：
The molding sand powder, is made up of the raw material of following percentage by weight：Sodium bentonite 72%, fine coal powder 21%, alphalise starch 3%, bright carbon 3%.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
A kind of method for producing of molding sand powder as claimed in claim 1, comprises the steps：
1）Semen Maydis powder or tapioca flour are carried out into high temperature extrusion expanding treatment through bulking equipment alphalise starch is obtained, wherein described high temperature extrusion temperature is 210 DEG C；
2）By above-mentioned steps 1）In obtained alphalise starch Jing it is high temperature acidified and grind dextrine powder is obtained；
3）220 DEG C of anaerobic calcinations of high-carbon material Jing being decomposed and being ground, while removing aromatic hydrocarbon obtains the bright carbon that purity is not less than 60%, and softening temperature is improved to 230 DEG C, the temperature of high-carbon material release gas is 450 DEG C；
4）By above-mentioned steps 2）In obtained dextrine powder, above-mentioned steps 3）In obtained light carbon be thoroughly mixed 46min with sodium bentonite, fine coal powder Jing powder stirrers this molding sand powder be obtained.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
The use technique of the present invention：When facing sand fresh sand addition is less than 20%, addition 3%, system sand technique, when fresh sand addition is less than 15%, after normal circulation use, addition is less than 1%.
Embodiment 3：
The molding sand powder, is made up of the raw material of following percentage by weight：Sodium bentonite 73%, fine coal powder 22%, alphalise starch 4%, bright carbon 4%.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
A kind of method for producing of molding sand powder as claimed in claim 1, comprises the steps：
1）Semen Maydis powder or tapioca flour are carried out into high temperature extrusion expanding treatment through bulking equipment alphalise starch is obtained, wherein described high temperature extrusion temperature is 220 DEG C；
2）By above-mentioned steps 1）In obtained alphalise starch Jing it is high temperature acidified and grind dextrine powder is obtained；
3）240 DEG C of anaerobic calcinations of high-carbon material Jing being decomposed and being ground, while removing aromatic hydrocarbon obtains the bright carbon that purity is not less than 60%, and softening temperature is improved to 260 DEG C, the temperature of high-carbon material release gas is 600 DEG C；
4）By above-mentioned steps 2）In obtained dextrine powder, above-mentioned steps 3）In obtained light carbon be thoroughly mixed 46min with sodium bentonite, fine coal powder Jing powder stirrers this molding sand powder be obtained.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
The use technique of the present invention：When facing sand fresh sand addition is less than 20%, addition 4%, system sand technique, when fresh sand addition is less than 15%, after normal circulation use, addition is less than 1%.
Embodiment 4：
The molding sand powder, is made up of the raw material of following percentage by weight：Sodium bentonite 74%, fine coal powder 23%, alphalise starch 4%, bright carbon 5%.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
A kind of method for producing of molding sand powder as claimed in claim 1, comprises the steps：
1）Semen Maydis powder or tapioca flour are carried out into high temperature extrusion expanding treatment through bulking equipment alphalise starch is obtained, wherein described high temperature extrusion temperature is 230 DEG C；
2）By above-mentioned steps 1）In obtained alphalise starch Jing it is high temperature acidified and grind dextrine powder is obtained；
3）280 DEG C of anaerobic calcinations of high-carbon material Jing being decomposed and being ground, while removing aromatic hydrocarbon obtains the bright carbon that purity is not less than 60%, and softening temperature is improved to 500 DEG C, the temperature of high-carbon material release gas is 700 DEG C；
4）By above-mentioned steps 2）In obtained dextrine powder, above-mentioned steps 3）In obtained light carbon be thoroughly mixed 50min with sodium bentonite, fine coal powder Jing powder stirrers this molding sand powder be obtained.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
The use technique of the present invention：When facing sand fresh sand addition is less than 20%, addition 4%, system sand technique, when fresh sand addition is less than 15%, after normal circulation use, addition is less than 1%.
Embodiment 5：
The molding sand powder, is made up of the raw material of following percentage by weight：Sodium bentonite 75%, fine coal powder 24%, alphalise starch 5%, bright carbon 5%.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
A kind of method for producing of molding sand powder as claimed in claim 1, comprises the steps：
1）Semen Maydis powder or tapioca flour are carried out into high temperature extrusion expanding treatment through bulking equipment alphalise starch is obtained, wherein described high temperature extrusion temperature is 240 DEG C；
2）By above-mentioned steps 1）In obtained alphalise starch Jing it is high temperature acidified and grind dextrine powder is obtained；
3）320 DEG C of anaerobic calcinations of high-carbon material Jing being decomposed and being ground, while removing aromatic hydrocarbon obtains the bright carbon that purity is not less than 60%, and softening temperature is improved to 550 DEG C, the temperature of high-carbon material release gas is 800 DEG C；
4）By above-mentioned steps 2）In obtained dextrine powder, above-mentioned steps 3）In obtained light carbon be thoroughly mixed 50min with sodium bentonite, fine coal powder Jing powder stirrers this molding sand powder be obtained.
, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
The use technique of the present invention：When facing sand fresh sand addition is less than 20%, addition 5%, system sand technique, when fresh sand addition is less than 15%, after normal circulation use, addition is less than 1%.
The beneficial effect of this specific embodiment is：1st, this product can substitute coal dust in conventional wet molding sand, potter's clay completely, and nontoxic, tasteless, pollution-free.2nd, addition is few, reduces the processing cost of foundry goods.3rd, it is simple to operate, and effectively prevent the formation of the casting flaws such as foundry goods scab, sand holes, pore.4th, while reducing dust pollution, reduce labor intensity, improve molding sand performance, reduce material cost, improve foundry goods fineness.
The specific embodiment of the present invention is not construed as limiting the invention, every analog structure and change using the present invention, within the scope of the present invention.
Claims (4)
1. a kind of molding sand powder, it is characterised in that：It is made up of the raw material of following percentage by weight：Sodium bentonite 70-75%, fine coal powder 19-25%, alphalise starch 2-5%, bright carbon 2-5%.
2. a kind of molding sand powder as claimed in claim 1, it is characterised in that：, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
3. a kind of method for producing of molding sand powder as claimed in claim 1, it is characterised in that：Comprise the steps：
1）Semen Maydis powder or tapioca flour are carried out into high temperature extrusion expanding treatment through bulking equipment alphalise starch is obtained, wherein described high temperature extrusion temperature is 200 ~ 260 DEG C；
2）By above-mentioned steps 1）In obtained alphalise starch Jing it is high temperature acidified and grind dextrine powder is obtained；
3）200 ~ 350 DEG C of anaerobic calcinations of high-carbon material Jing being decomposed and being ground, while removing aromatic hydrocarbon obtains the bright carbon that purity is not less than 60%, and softening temperature is improved to 200 ~ 600 DEG C, the temperature of high-carbon material release gas is 200 ~ 880 DEG C；
4）By above-mentioned steps 2）In obtained dextrine powder, above-mentioned steps 3）In obtained light carbon be thoroughly mixed 45 ~ 50min with sodium bentonite, fine coal powder Jing powder stirrers this molding sand powder be obtained.
4. a kind of molding sand powder as claimed in claim 3, it is characterised in that：, above by 200 mesh sieve holes, above by 140 mesh sieve holes, above by 140 mesh sieve holes, the bright carbon granules degree 95% is above by 140 mesh sieve holes for the alphalise starch granularity 95% for the cleaned coal Powder Particle Size 95% for described Na-bentonite soil granularity 95%.
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| CN201610275898.2A CN106513562A (en) | 2016-04-29 | 2016-04-29 | Molding sand powder and processing production method thereof |
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| CN201610275898.2A CN106513562A (en) | 2016-04-29 | 2016-04-29 | Molding sand powder and processing production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111842776A (en) * | 2020-06-29 | 2020-10-30 | 曲阜市铸造材料厂 | Low-carbon green sand material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111842776A (en) * | 2020-06-29 | 2020-10-30 | 曲阜市铸造材料厂 | Low-carbon green sand material and preparation method thereof |
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Application publication date: 20170322 |