CN104139153A - Environment-friendly foundry sand - Google Patents
Environment-friendly foundry sand Download PDFInfo
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- CN104139153A CN104139153A CN201410366465.9A CN201410366465A CN104139153A CN 104139153 A CN104139153 A CN 104139153A CN 201410366465 A CN201410366465 A CN 201410366465A CN 104139153 A CN104139153 A CN 104139153A
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- molding sand
- sand
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Abstract
The invention discloses environment-friendly foundry sand and relates to the field of foundry materials. The environment-friendly foundry sand comprises, by weight, 60-70 parts of silica sand, 5-10 parts of chromite sand, 30-40 parts of household refuse ash, 6-8 parts of coal ash, 6-8 parts of lime powder, 3-5 parts of furan resin and 4-10 parts of coal dust. The household refuse ash and the coal ash are added to achieve recycling of waste. Furthermore, the environment-friendly foundry sand is low in cost, good in chilling effect, refractoriness, air permeability and sand inclusion resistance, small in amount of burnt-on sand, and capable of increasing the rate of finished products remarkably for small cast steel.
Description
Technical field
The present invention relates to casting Material Field, refer more particularly to a kind of environmental-protecting type casting molding sand.
Background technology
Molding sand is in casting, to be used for the material of moulding.Molding sand is generally mixed according to a certain percentage by Modeling Materials such as Foundry sand, moulding sand binder and additional things, the effect of molding sand in Foundry Production is very important, and the casting wasted product causing because of the poor quality of molding sand accounts for 30～50% of the total waste product of foundry goods.Conventionally to the requirement of molding sand, be: the first, there is higher intensity and heat endurance, to bear the effect of various external force and high temperature; The second, good mobility, the ability that molding sand mutually moves between sand grains under external force or Action of Gravity Field own; The 3rd, certain plasticity, molding sand is out of shape under external force, can keep the ability of the shape that gives after external force is removed; The 4th, good gas permeability, molding sand hole sees through the ability of gas; The 5th, high collapsibility, weighs up again grittiness, and after casting solidification, whether molding sand easily destroys, the performance of whether easily removing from foundry goods.
The allowance of small-sized steel casting only has 3～5mm, and requires casting section thickness error little, and surface is without sand holes, and burning into sand is few, the defects such as inner pore-free and shrinkage cavity.But, molding sand of the prior art, these problems of existence more or less, main, along with the growth of the molding sand prices of raw and semifnished materials, the cost of molding sand casting is also more and more higher.
Summary of the invention
The invention provides a kind of environmental-protecting type casting molding sand, solve in prior art, common sand can not meet that small-sized steel casting wall thickness deflection is little, scab will be lacked, and dimple is few, internal porosity and the few requirement of shrinkage cavity, and the high problem of molding sand price.
For solving the problems of the technologies described above, technical scheme provided by the invention is:
A kind of environmental-protecting type casting molding sand of the present invention, the weight portion of its constitutive material is: 60～70 parts of silica sands, 5～10 parts of chromite sands, 30～40 parts of domestic garbage cinders, 6～8 parts, flyash, 6～8 parts of pulverized limestones, 3～5 parts of furane resins, 4～10 parts of coal dusts.
Further, described domestic garbage cinder is the bottom ash after common burning city domestic garbage.
Further, the characteristic of char residue of described coal dust is 4～5 grades.
Further, described domestic garbage cinder particle diameter is between 200 order～20 orders.
Further, described flyash particle diameter is between 200 order～50 orders.
Further, in described domestic garbage cinder, each substances in percentage by weight is: SiO
245%～60%, Fe
2o
310%～15%, Al
2o
310%～18%, CaO 10%～16%, TiO
20.8%～1.2%, MgO 1%～3%, K
2o 0～2.5%, Na
2o 0～2.5%, P
2o
52.5%～3.5%.
Adopt technical scheme provided by the invention, compare with existing known technology, there is following beneficial effect:
(1) a kind of environmental-protecting type casting molding sand of the present invention, the domestic garbage cinder adding in molding sand, flyash are all the recyclings to refuse, economize on resources, and reduce casting cost.
(2) a kind of environmental-protecting type casting molding sand of the present invention, chill effect, refractoriness and good permeability, anti-burning into sand performance is high, and scab is few, and for small-sized steel casting, yield rate is high.
(3) a kind of environmental-protecting type casting molding sand of the present invention, preparation method is simple, and formula is rationally.
The specific embodiment
For further understanding content of the present invention, the present invention is described in detail in conjunction with the embodiments.
Embodiment 1: a kind of environmental-protecting type casting molding sand, and the weight portion of its constitutive material is: 60 parts of silica sands, 5 parts of chromite sands, 30 parts of the bottom ash after common burning city domestic garbage, particle diameter is 200 orders, its each substances in percentage by weight is: SiO
245%, Fe
2o
315%, Al
2o
318%, CaO 10%, TiO
21.2%, MgO 3%, K
2o 2.5%, Na
2o 2.5%, P
2o
52.5%, surplus is moisture, 6 parts, flyash, and particle diameter is 200 orders, 6 parts of pulverized limestones, 3 parts of furane resins, 4 parts of coal dusts, its characteristic of char residue is 4 grades, the molding sand that the present embodiment is prepared out, chill effect, refractoriness and good permeability, anti-burning into sand performance is high, and scab is few.
Embodiment 2: a kind of environmental-protecting type casting molding sand, and the weight portion of its constitutive material is: 70 parts of silica sands, 10 parts of chromite sands, 40 parts of the bottom ash after common burning city domestic garbage, particle diameter is 20 orders, each substances in percentage by weight is: SiO
260%, Fe
2o
315%, Al
2o
318%, CaO 16%, TiO
21.2%, MgO 3%, K
2o 2.5%, Na
2o 2.5%, P
2o
53.5%, surplus is moisture, 8 parts, flyash, and particle diameter is 50 orders, 8 parts of pulverized limestones, 5 parts of furane resins, 10 parts of coal dusts, characteristic of char residue is 5 grades, the molding sand that the present embodiment is prepared out, chill effect, refractoriness and good permeability, anti-burning into sand performance is high, and scab is few.
Embodiment 3: a kind of environmental-protecting type casting molding sand, and the weight portion of its constitutive material is: 65 parts of silica sands, 8 parts of chromite sands, 35 parts of the bottom ash after common burning city domestic garbage, particle diameter is 100 orders, each substances in percentage by weight is: SiO
250%, Fe
2o
313%, Al
2o
312%, CaO 14%, TiO
21%, MgO 2%, K
2o 1%, Na
2o 1%, P
2o
53%, surplus is moisture, 7 parts, flyash, and particle diameter is being 100 orders, 7 parts of pulverized limestones, 4 parts of furane resins, 6 parts of coal dusts, characteristic of char residue is 4 grades, the molding sand that the present embodiment is prepared out, chill effect, refractoriness and good permeability, anti-burning into sand performance is high, and scab is few.
Embodiment 4: a kind of environmental-protecting type casting molding sand, and the weight portion of its constitutive material is: 64 parts of silica sands, 7 parts of chromite sands, 33 parts of the bottom ash after common burning city domestic garbage, particle diameter is 120 orders, each substances in percentage by weight is: SiO
252%, Fe
2o
313%, Al
2o
311%, CaO 12%, TiO
20.9%, MgO 2.1%, K
2o 2%, Na
2o1.5%, P
2o
52.8%, surplus is moisture, 7 parts, flyash, and particle diameter is 120 orders, 8 parts of pulverized limestones, 4 parts of furane resins, 8 parts of coal dusts, characteristic of char residue is 5 grades, the molding sand that the present embodiment is prepared out, chill effect, refractoriness and good permeability, anti-burning into sand performance is high, and scab is few.
Embodiment 5: a kind of environmental-protecting type casting molding sand, and the weight portion of its constitutive material is: 66 parts of silica sands, 6 parts of chromite sands, 36 parts of the bottom ash after common burning city domestic garbage, particle diameter is 80 orders, each substances in percentage by weight is: SiO
256%, Fe
2o
311%, Al
2o
312%, CaO 13%, TiO
21%, MgO 1%, K
2o 1%, Na
2o 1%, P
2o
52.8%, surplus is moisture, 8 parts, flyash, and particle diameter is 80 orders, 6 parts of pulverized limestones, 5 parts of furane resins, 6 parts of coal dusts, characteristic of char residue is 4 grades, the molding sand that the present embodiment is prepared out, chill effect, refractoriness and good permeability, anti-burning into sand performance is high, and scab is few.
It should be noted last that, the above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of the technical program technical scheme, it all should be encompassed in the middle of the claim scope of the technical program.
Claims (6)
1. an environmental-protecting type casting molding sand, is characterized in that, the weight portion of constitutive material is: 60～70 parts of silica sands, 5～10 parts of chromite sands, 30～40 parts of domestic garbage cinders, 6～8 parts, flyash, 6～8 parts of pulverized limestones, 3～5 parts of furane resins, 4～10 parts of coal dusts.
2. environmental-protecting type casting molding sand according to claim 1, is characterized in that, described domestic garbage cinder is the bottom ash after common burning city domestic garbage.
3. environmental-protecting type casting molding sand according to claim 1, is characterized in that, the characteristic of char residue of described coal dust is 4～5 grades.
4. environmental-protecting type casting molding sand according to claim 1, is characterized in that, described domestic garbage cinder particle diameter is between 200 order～20 orders.
5. environmental-protecting type casting molding sand according to claim 1, is characterized in that, described flyash particle diameter is between 200 order～50 orders.
6. according to arbitrary described environmental-protecting type casting molding sand in claim 1～5, it is characterized in that, in described domestic garbage cinder, each substances in percentage by weight is: SiO
245%～60%, Fe
2o
310%～15%, Al
2o
310%～18%, CaO 10%～16%, TiO
20.8%～1.2%, MgO 1%～3%, K
2o 0～2.5%, Na
2o 0～2.5%, P
2o
52.5%～3.5%, surplus is moisture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410366465.9A CN104139153B (en) | 2014-07-28 | 2014-07-28 | A kind of environment-friendlymolding molding sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410366465.9A CN104139153B (en) | 2014-07-28 | 2014-07-28 | A kind of environment-friendlymolding molding sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104139153A true CN104139153A (en) | 2014-11-12 |
| CN104139153B CN104139153B (en) | 2016-08-17 |
Family
ID=51848587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410366465.9A Expired - Fee Related CN104139153B (en) | 2014-07-28 | 2014-07-28 | A kind of environment-friendlymolding molding sand |
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| CN (1) | CN104139153B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493070A (en) * | 2014-11-26 | 2015-04-08 | 马鞍山市恒达耐磨材料有限责任公司 | Molding sand for cast steel and preparation method thereof |
| CN104841851A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Environment-friendly energy-saving sand and production method thereof |
| CN104841859A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Environmental molding sand and preparation method thereof |
| CN105170878A (en) * | 2015-09-21 | 2015-12-23 | 蚌埠冠宜型材科技有限公司 | Environment-friendly molding sand used for casting |
| CN105215261A (en) * | 2015-09-21 | 2016-01-06 | 蚌埠冠宜型材科技有限公司 | A kind of method utilizing building waste to manufacture molding sand |
| CN107737865A (en) * | 2017-10-12 | 2018-02-27 | 东风精密铸造安徽有限公司 | A kind of casting sand |
| CN108339932A (en) * | 2018-02-07 | 2018-07-31 | 安徽合力股份有限公司合肥铸锻厂 | A kind of preparation method of injecting type 3D printer molding sand |
| CN108555225A (en) * | 2018-04-24 | 2018-09-21 | 常州思宇知识产权运营有限公司 | A kind of environmentally-friendly water-based sand core repairing sand |
| CN108772532A (en) * | 2018-06-19 | 2018-11-09 | 马鞍山市益丰实业集团有限公司 | A kind of box moulding sand formula and preparation process |
| CN109175214A (en) * | 2018-10-19 | 2019-01-11 | 含山县兴达球墨铸铁厂 | A kind of casting rapid-curing cutback sand formulation |
| CN112775390A (en) * | 2020-12-19 | 2021-05-11 | 郑州煤机格林材料科技有限公司 | Mixed sand process replacing pure chromium ore sand |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493070A (en) * | 2014-11-26 | 2015-04-08 | 马鞍山市恒达耐磨材料有限责任公司 | Molding sand for cast steel and preparation method thereof |
| CN104841851A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Environment-friendly energy-saving sand and production method thereof |
| CN104841859A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Environmental molding sand and preparation method thereof |
| CN105170878A (en) * | 2015-09-21 | 2015-12-23 | 蚌埠冠宜型材科技有限公司 | Environment-friendly molding sand used for casting |
| CN105215261A (en) * | 2015-09-21 | 2016-01-06 | 蚌埠冠宜型材科技有限公司 | A kind of method utilizing building waste to manufacture molding sand |
| CN107737865A (en) * | 2017-10-12 | 2018-02-27 | 东风精密铸造安徽有限公司 | A kind of casting sand |
| CN108339932A (en) * | 2018-02-07 | 2018-07-31 | 安徽合力股份有限公司合肥铸锻厂 | A kind of preparation method of injecting type 3D printer molding sand |
| CN108339932B (en) * | 2018-02-07 | 2019-11-08 | 安徽合力股份有限公司合肥铸锻厂 | A kind of preparation method of injecting type 3D printer molding sand |
| CN108555225A (en) * | 2018-04-24 | 2018-09-21 | 常州思宇知识产权运营有限公司 | A kind of environmentally-friendly water-based sand core repairing sand |
| CN108772532A (en) * | 2018-06-19 | 2018-11-09 | 马鞍山市益丰实业集团有限公司 | A kind of box moulding sand formula and preparation process |
| CN109175214A (en) * | 2018-10-19 | 2019-01-11 | 含山县兴达球墨铸铁厂 | A kind of casting rapid-curing cutback sand formulation |
| CN112775390A (en) * | 2020-12-19 | 2021-05-11 | 郑州煤机格林材料科技有限公司 | Mixed sand process replacing pure chromium ore sand |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104139153B (en) | 2016-08-17 |
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