CN111014568A - A kind of casting powder containing waste gypsum and preparation method thereof - Google Patents
A kind of casting powder containing waste gypsum and preparation method thereof Download PDFInfo
- Publication number
- CN111014568A CN111014568A CN201911274840.6A CN201911274840A CN111014568A CN 111014568 A CN111014568 A CN 111014568A CN 201911274840 A CN201911274840 A CN 201911274840A CN 111014568 A CN111014568 A CN 111014568A
- Authority
- CN
- China
- Prior art keywords
- gypsum
- waste
- model material
- casting powder
- waste gypsum
- 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
- 239000010440 gypsum Substances 0.000 title claims abstract description 67
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 66
- 239000002699 waste material Substances 0.000 title claims abstract description 31
- 238000005266 casting Methods 0.000 title claims abstract description 29
- 239000000843 powder Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 33
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 4
- 150000004683 dihydrates Chemical class 0.000 claims abstract description 3
- 238000007873 sieving Methods 0.000 claims description 7
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 229910052925 anhydrite Inorganic materials 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 18
- 238000002156 mixing Methods 0.000 description 10
- 238000005495 investment casting Methods 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of resources and environment, in particular to waste gypsum-containing casting powder and a preparation method thereof. Comprises waste gypsum model material and semi-hydrated gypsum, wherein the addition amount of the semi-hydrated gypsum is 5-15% of the total addition amount of the waste gypsum model material and the semi-hydrated gypsum. The invention crushes and screens the waste gypsum model material; and adding semi-hydrated gypsum into the sieved crushed material to convert the anhydrous gypsum into dihydrate gypsum. The scheme of the invention enables the gypsum mold casting powder to be recycled, reduces resource consumption and is beneficial to environmental protection.
Description
Technical Field
The invention relates to the technical field of resources and environment, in particular to waste gypsum-containing casting powder and a preparation method thereof.
Background
The gypsum type investment casting process can be used for casting castings with complex shapes, fine internal structures, high dimensional accuracy and high surface smoothness, and is widely applied to the industries of aerospace, automobiles, ships, weapons, art and the like. The process of the gypsum mold investment casting technology is that gypsum mold casting powder and water are mixed to prepare slurry, the slurry is poured into a mold set with a wax mold under the vacuum condition, after the slurry is condensed and naturally dried, the dewaxing mold is dewaxed and roasted to form the gypsum mold, and then the metal liquid is poured. Gypsum-based molding powders are investment cast molding materials that have been conventionally discarded as industrial solid waste. The waste materials are not researched to recycle at present, and long-term stacking of the waste materials can cause serious harm to the environment.
Disclosure of Invention
In view of the above, in order to recycle the gypsum solid waste in the precision casting industry, the invention provides the waste gypsum-containing casting powder and the preparation method thereof, so that the gypsum-containing casting powder can be recycled, the resource consumption is reduced, and the environmental protection is facilitated.
In order to realize the first invention, the invention adopts the following technical scheme:
a molding powder containing waste gypsum comprises a waste gypsum model material and semi-hydrated gypsum, wherein the addition amount of the semi-hydrated gypsum is 5-15% of the total addition amount of the waste gypsum model material and the semi-hydrated gypsum.
In order to achieve the second object, the present invention adopts the following technical solutions:
a method for preparing waste gypsum-containing casting powder comprises pulverizing waste gypsum model material, and sieving; and adding the semi-hydrated gypsum into the sieved fine material to convert the anhydrous gypsum into dihydrate gypsum with gelling property.
In the present invention, hemihydrate gypsum (CaSO) is added to the waste gypsum4·1/2H2O) to impart gelling properties to such waste gypsum particles.
The waste gypsum model material is calcined and cast, the gypsum in the waste gypsum model material is changed into an anhydrous gypsum form, and the waste gypsum model material is subjected to hydrous conversion and is recycled.
The particle size of the screened waste gypsum model material is 10-150 meshes.
The invention has the beneficial effects that:
the scheme of the invention has the characteristics of simple operation and low cost, and the waste gypsum industrial solid waste is recycled.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be further clearly and completely described below with reference to the embodiments of the present invention. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the description of the present invention, it is to be noted that the specific conditions are not specified in the examples, and the operation is performed in accordance with the conventional conditions. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
Firstly, crushing 10kg of dried waste gypsum model material; and then, sieving the crushed materials by a sieve of 10 meshes, taking 9kg of the obtained sieved materials, and mixing the sieved materials with 1kg of semi-hydrated gypsum powder to obtain the gypsum type casting powder for precision casting. Mixing the casting powder and 4kg of water to prepare slurry, pouring the slurry into a die set with a wax die under a vacuum condition, solidifying the slurry, naturally drying, removing the wax die, roasting to form a gypsum mold, and then pouring silver metal liquid to obtain a silver casting with high dimensional precision and good surface smoothness.
Example 2
Firstly, 10kg of soaked gypsum model material is dried and then crushed; and sieving the crushed materials with a 120-mesh sieve, and mixing 9.5kg of sieved materials with 0.5kg of semi-hydrated gypsum powder to obtain the gypsum type casting powder for precision casting. Mixing the casting powder and 4kg of water to prepare slurry, pouring the slurry into a die set with a wax die under a vacuum condition, solidifying the slurry, naturally drying, removing the wax die, roasting to form a gypsum mold, and pouring copper metal liquid to obtain the copper casting with high dimensional precision and good surface smoothness.
Example 3
Firstly, crushing 10kg of dried waste gypsum model material; and then, sieving the crushed materials by a sieve of 10 meshes, taking 8kg of the obtained sieved materials, and mixing the sieved materials with 1.5kg of semi-hydrated gypsum powder to obtain the gypsum mold casting powder for precision casting. Mixing the casting powder and 4kg of water to prepare slurry, pouring the slurry into a die set with a wax die under a vacuum condition, solidifying the slurry, naturally drying, removing the wax die, roasting to form a gypsum mold, and then pouring silver metal liquid to obtain a silver casting with high dimensional precision and good surface smoothness.
Example 4
Firstly, 10kg of soaked gypsum model material is dried and then crushed; and sieving the crushed materials with a 120-mesh sieve, and mixing 9.2kg of the obtained sieved materials with 0.8kg of semi-hydrated gypsum powder to obtain the gypsum type casting powder for precision casting. Mixing the casting powder and 4kg of water to prepare slurry, pouring the slurry into a die set with a wax die under a vacuum condition, solidifying the slurry, naturally drying, removing the wax die, roasting to form a gypsum mold, and pouring copper metal liquid to obtain the copper casting with high dimensional precision and good surface smoothness.
Example 5
Firstly, 10kg of soaked gypsum model material is dried and then crushed; and then sieving the crushed materials with a 120-mesh sieve, and mixing 9.4kg of the obtained sieved materials with 0.6kg of semi-hydrated gypsum powder to obtain the gypsum type casting powder for precision casting. Mixing the casting powder and 4kg of water to prepare slurry, pouring the slurry into a die set with a wax die under a vacuum condition, solidifying the slurry, naturally drying, removing the wax die, roasting to form a gypsum mold, and pouring copper metal liquid to obtain the copper casting with high dimensional precision and good surface smoothness.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911274840.6A CN111014568A (en) | 2019-12-12 | 2019-12-12 | A kind of casting powder containing waste gypsum and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911274840.6A CN111014568A (en) | 2019-12-12 | 2019-12-12 | A kind of casting powder containing waste gypsum and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111014568A true CN111014568A (en) | 2020-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911274840.6A Pending CN111014568A (en) | 2019-12-12 | 2019-12-12 | A kind of casting powder containing waste gypsum and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111014568A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1436522A (en) * | 1973-03-02 | 1976-05-19 | Bayer Ag | Foam concrete a process for its production and its use in the manufacture of structural element |
| CN1392035A (en) * | 2001-06-20 | 2003-01-22 | 曹光华 | Process for preparing light high-strength wall material alpha gypsum block |
| CN1919781A (en) * | 2005-08-26 | 2007-02-28 | 武汉冶金建筑研究院 | Gypsum building block manufactured by chemical gypsum and industrial waste and manufacture method thereof |
| CN102826771A (en) * | 2012-08-10 | 2012-12-19 | 梅州淦源建材科技有限公司 | Coal gangue activator, and novel clinker-free cementing material and preparation method thereof |
| KR101442668B1 (en) * | 2014-03-31 | 2014-11-04 | 주식회사 이에스피소재 | Compositions water stop of cement-based and waterproof, groutedcolumn method using the same |
| CN105272030A (en) * | 2015-10-14 | 2016-01-27 | 莱州奇明建材有限公司 | Double-liquid grouting material with good durability and no environment pollution |
| CN110205671A (en) * | 2019-07-04 | 2019-09-06 | 江苏一夫科技股份有限公司 | It is a kind of to prepare Dihydrate gypsum whiskers, the method for hemihydrate calcium sulfate crystal whisker and product as made from it |
-
2019
- 2019-12-12 CN CN201911274840.6A patent/CN111014568A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1436522A (en) * | 1973-03-02 | 1976-05-19 | Bayer Ag | Foam concrete a process for its production and its use in the manufacture of structural element |
| CN1392035A (en) * | 2001-06-20 | 2003-01-22 | 曹光华 | Process for preparing light high-strength wall material alpha gypsum block |
| CN1919781A (en) * | 2005-08-26 | 2007-02-28 | 武汉冶金建筑研究院 | Gypsum building block manufactured by chemical gypsum and industrial waste and manufacture method thereof |
| CN102826771A (en) * | 2012-08-10 | 2012-12-19 | 梅州淦源建材科技有限公司 | Coal gangue activator, and novel clinker-free cementing material and preparation method thereof |
| KR101442668B1 (en) * | 2014-03-31 | 2014-11-04 | 주식회사 이에스피소재 | Compositions water stop of cement-based and waterproof, groutedcolumn method using the same |
| CN105272030A (en) * | 2015-10-14 | 2016-01-27 | 莱州奇明建材有限公司 | Double-liquid grouting material with good durability and no environment pollution |
| CN110205671A (en) * | 2019-07-04 | 2019-09-06 | 江苏一夫科技股份有限公司 | It is a kind of to prepare Dihydrate gypsum whiskers, the method for hemihydrate calcium sulfate crystal whisker and product as made from it |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200417 |
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| WD01 | Invention patent application deemed withdrawn after publication |