CN87104083A - Rice hull heat-insulating riser sleeve material - Google Patents
Rice hull heat-insulating riser sleeve material Download PDFInfo
- Publication number
- CN87104083A CN87104083A CN87104083.2A CN87104083A CN87104083A CN 87104083 A CN87104083 A CN 87104083A CN 87104083 A CN87104083 A CN 87104083A CN 87104083 A CN87104083 A CN 87104083A
- Authority
- CN
- China
- Prior art keywords
- rice husk
- sio
- bentonite
- quartz sand
- sand
- 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.)
- Granted
Links
- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 32
- 235000009566 rice Nutrition 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 title claims abstract description 28
- 240000007594 Oryza sativa Species 0.000 title 1
- 241000209094 Oryza Species 0.000 claims abstract description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000010903 husk Substances 0.000 claims abstract description 23
- 239000006004 Quartz sand Substances 0.000 claims abstract description 16
- 239000000440 bentonite Substances 0.000 claims abstract description 14
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 14
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011734 sodium Substances 0.000 claims abstract 4
- 238000009413 insulation Methods 0.000 claims abstract 2
- 239000000203 mixture Substances 0.000 claims description 6
- 238000005266 casting Methods 0.000 abstract description 9
- 239000004576 sand Substances 0.000 abstract description 8
- 238000001035 drying Methods 0.000 abstract description 6
- 239000011230 binding agent Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000227 grinding Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004321 preservation Methods 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 231100000331 toxic Toxicity 0.000 abstract description 2
- 230000002588 toxic effect Effects 0.000 abstract description 2
- 239000012774 insulation material Substances 0.000 abstract 1
- 231100000252 nontoxic Toxicity 0.000 abstract 1
- 230000003000 nontoxic effect Effects 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910020489 SiO3 Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 206010013952 Dysphonia Diseases 0.000 description 1
- 206010015150 Erythema Diseases 0.000 description 1
- 208000010473 Hoarseness Diseases 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 231100000321 erythema Toxicity 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
稻壳保温冒口套材料，属于铸造保温材料。现有材料多有毒性、生产时挥发出氨气对眼睛和皮肤刺激很大。原料价昂且短缺。本发明材料由碳化稻壳、粉碎稻壳、石英砂、膨润土、Na2SiO3、Na3PO4混合而成。制做过程是用Na2SiO3与Na3PO4制成粘结剂加到其它物料中，再经过搅拌、碾砂、浸润、造型和烘干即成。由本发明材料制得产品的特点是：无毒、补缩效果好——节钢，提高铸件成品率、原料广泛，保温效果好、表面光滑、不沾砂。The rice husk thermal insulation riser sleeve material belongs to the casting thermal insulation material. Most of the existing materials are toxic, and the ammonia gas volatilized during production is very irritating to the eyes and skin. Raw materials are expensive and in short supply. The material of the invention is formed by mixing carbonized rice husk, crushed rice husk, quartz sand, bentonite, Na 2 SiO 3 and Na 3 PO 4 . The production process is to use Na 2 SiO 3 and Na 3 PO 4 to make a binder and add it to other materials, and then go through stirring, sand grinding, soaking, molding and drying. The characteristics of the product made from the material of the invention are: non-toxic, good feeding effect-saving steel, improving casting yield, wide range of raw materials, good heat preservation effect, smooth surface, and no sand.
Description
The present invention belongs to a casting heat-insulating material.
At present, the materials of the casting riser bush which is commonly used at home and abroad are as follows: 1. the refractory fiber heat-insulating riser bush is made of quartz sand as a framework material and aluminum silicate as a heat-insulating material, 2, the riser bush is made of mineral wool, paper pulp and other materials as heat-insulating materials and quartz sand as a framework, and 3, the common riser bush is made of water glass 70 sand or water glass silica sand. Phenolic resin is used in the forming process. Some urea-formaldehyde resin and some Wutai products are used as adhesive. The common defects of the riser bush made of the materials are as follows: 1. the use of the urotropine as the adhesive is generally toxic, and particularly strong ammonia gas is volatilized in the drying process, so that the urotropine has great stimulation to the respiratory system of people and stronger stimulation to eyes and skin. The operators who operate in the environment for a long time often have diseases such as throat discomfort, hoarseness, erythema on the face and the like, 2, the needed raw materials are expensive, particularly resin type adhesives are high in price and lack of sources, and 3, the heat transfer performance of the ordinary sand mould riser is the same as that of the riser because the riser material is completely the same as that of the casting mould material. The heat preservation effect is not obvious, the heat loss of the feeder head is large, and the feeding efficiency of the feeder head made of common materials is low.
The invention aims to provide a novel heat-insulating riser sleeve material. Reduce the pollution of the operating environment, reduce the cost, save the molten steel and improve the quality of the casting.
The key point for realizing the invention is as follows: the quartz sand is used as a framework material for the heat-insulating riser sleeve. Also comprises mixture of carbonized rice hull and pulverized rice hull, bentonite, and composite binder (Na)2SiO3With Na3PO4A mixture). The components of the rice husk crusher basically comprise 45-50% of carbonized rice husks or a mixture of the carbonized rice husks and crushed rice husks, 28-35% of quartz sand and 12-5% of bentonite. Na (Na)2SiO314%Na3PO41 percent. The materials are selected according to the following: the rice hulls, particularly carbonized rice hulls, have small thermal conductivity and small specific gravity, are rich in silicon dioxide, and form thin-shell structures under the condition of combustion. Multi-level thermal isolation function is formed, and thermal radiation loss is effectively prevented. Meanwhile, the method utilizes waste and has easily obtained raw materials. The bentonite is added to increase the wet strength. By NO3PO4The high-temperature binder is used for ensuring enough condensation strength and good condensation effect at high temperature.
The main advantages of the invention are:
1. no toxicity and no pollution to the operating environment;
2. the feeding effect is good, the steel saving is obvious, and the casting cost is reduced;
3. the yield of the casting can be improved by 2-10%;
4. the raw material source is wide, and the waste utilization is realized;
5. the weight is light, the volume is small, and the heat preservation effect is good;
6. smooth surface, no sand sticking, and improved cutting and machining efficiency.
Several specific embodiments of the invention are described below:
example 1, the riser bush comprises the following materials in proportion (by weight): 50% of carbonized rice husk, 28% of refined quartz sand, 7% of bentonite and Na with the modulus of 2.22SiO314%，Na3PO41 percent. The preparation method comprises the following steps: weighing the materials according to the proportion, and putting the carbonized rice hulls, the quartz sand and the bentonite into a stirrer. The preparation process of the composite binder comprises the following steps: firstly, weighing Na3PO4Grinding, dissolving in water at 80-90 deg.C, and adding weighed Na2SiO3In (1). And pouring the prepared composite binder into a stirrer for fully mixing. And putting the uniformly stirred mixed material into a sand grinding machine, grinding the sand for 10-12 minutes, and discharging the mixed material to soak for 35-45 minutes. And then placing the mixture into a mould for moulding. Both manually and mechanically compact. And naturally drying or drying the semi-finished product at low temperature. The low temperature drying process is drying at 80 deg.C for two hours, and then at 130 deg.C for 4 hours.
Example 2, the riser bush comprises the following materials in proportion (by weight): carbonized rice hull 32%, raw rice hull (crushed to below 20 meshes) 15%, quartz sand 28%, bentonite 10%, Na2SiO314%、Na3PO41% by weight, the procedure was as in example 1.
The riser bush is a technological measure which is adopted to eliminate the defects of shrinkage cavity, shrinkage porosity and the like generated in the solidification process of the casting and meet the feeding requirement. A large amount of heat-insulating riser sleeves are needed in the production of cast steel, cast iron, cast aluminum and cast copper in the metallurgical industry.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104083 CN1020371C (en) | 1987-06-10 | 1987-06-10 | Rice husk-heat-preservation sleeve material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104083 CN1020371C (en) | 1987-06-10 | 1987-06-10 | Rice husk-heat-preservation sleeve material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87104083A true CN87104083A (en) | 1988-12-21 |
| CN1020371C CN1020371C (en) | 1993-04-28 |
Family
ID=4814721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87104083 Expired - Fee Related CN1020371C (en) | 1987-06-10 | 1987-06-10 | Rice husk-heat-preservation sleeve material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020371C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100333859C (en) * | 2005-09-29 | 2007-08-29 | 朱晓明 | Fiber composite heat insulation riser sleever |
| CN100421836C (en) * | 2005-12-27 | 2008-10-01 | 宝山钢铁股份有限公司 | A granular carbonized rice husk covering agent |
| CN103658570A (en) * | 2013-12-17 | 2014-03-26 | 西宁特殊钢股份有限公司 | Heating cover board for casting alloy steel die and refining method thereof |
-
1987
- 1987-06-10 CN CN 87104083 patent/CN1020371C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100333859C (en) * | 2005-09-29 | 2007-08-29 | 朱晓明 | Fiber composite heat insulation riser sleever |
| CN100421836C (en) * | 2005-12-27 | 2008-10-01 | 宝山钢铁股份有限公司 | A granular carbonized rice husk covering agent |
| CN103658570A (en) * | 2013-12-17 | 2014-03-26 | 西宁特殊钢股份有限公司 | Heating cover board for casting alloy steel die and refining method thereof |
| CN103658570B (en) * | 2013-12-17 | 2015-07-01 | 西宁特殊钢股份有限公司 | Heating cover board for casting alloy steel die and refining method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1020371C (en) | 1993-04-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |