DE659805C - Process for the production of porous, pressed insulating moldings - Google Patents
Process for the production of porous, pressed insulating moldingsInfo
- Publication number
- DE659805C DE659805C DET47531D DET0047531D DE659805C DE 659805 C DE659805 C DE 659805C DE T47531 D DET47531 D DE T47531D DE T0047531 D DET0047531 D DE T0047531D DE 659805 C DE659805 C DE 659805C
- Authority
- DE
- Germany
- Prior art keywords
- moldings
- porous
- production
- insulating
- pressed
- 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.)
- Expired
Links
- 238000000465 moulding Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- 235000002595 Solanum tuberosum Nutrition 0.000 description 2
- 244000061456 Solanum tuberosum Species 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229920001592 potato starch Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000008098 formaldehyde solution Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/28—Polysaccharides or derivatives thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Thermal Insulation (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
Verfahren zur Herstellung von porigen, gepreßten Isolierformlingen Gegenstand der Erfindung ist ein Verfahren zur Herstellung von porigen, gepreßten Isolierformlingen. Es ist bekannt, Isolierformlinge im. Gießverfahren dadurch herzustellen, daß anorganische pulverförmige Isolierstoffe mit gasentwickelnden Stoffen, wie z. B. Bicarbonat u. dgl., vermischt werden, wobei diese Stoffe in Gegenwart von Wasser und in Wärme Gas entwickeln. Diese bekannten Gießverfahren gestatten jedoch nicht, Wandstärken der Isolierformlinge von z. B. 10, 15 oder 2o mm herzustellen. Bei solchen geringen Wandstärken reißen beim Trocknen die Formlinge, und das- Gefüge solcher .Erzeugnisse wird zerstört. Nach den bekannten Verfähren werden solche Isolierformlinge aus pulverförmigen anorganischen Rohstoffen in Wandstärken von 25 mm aufwärts hergestellt.Process for producing porous, pressed insulating moldings The invention relates to a process for producing porous, pressed insulating moldings. It is known that insulating moldings in the. Casting process to produce that inorganic powdery insulating materials with gas-evolving substances, such as. B. bicarbonate and the like., Are mixed, these substances develop gas in the presence of water and heat. However, these known casting methods do not allow wall thicknesses of the insulating moldings of z. B. 10, 15 or 2o mm. With such small wall thicknesses, the moldings tear during drying, and the structure of such products is destroyed. According to the known method, such insulating moldings are produced from powdered inorganic raw materials with wall thicknesses of 25 mm and up.
Bei dem Verfahren gemäß der Erfindung wird dieser Übelstand abgestellt, und mittels des neuen Verfahrens sind Formlinge geringerer Wandstärke herstellbar. Bei dem Verfahren wird gemäß der Erfindung als gas. .entwickelnder und härtender Stoff Formaldehyd verwendet. Das Verfahren gemäß der Erfindung beruht auf der Beobachtung, daß Formaldehyd (CH20) in Gegenwart von Wasser und Kartoffelflocken, Kartoffelwalzmehl o. dgl. unter Anwendung von Wärme ,eine überaus feine Gasentwicklung liefert, die @es gestattet, gepreßte, porige Isolierformlinge aus anorganischen pulverförmigen Isolierrohstoffen, wie z. B. Kieselgur, Lichtstaub u. dgl., herzustellen.In the method according to the invention, this drawback is eliminated, and by means of the new process, moldings with a smaller wall thickness can be produced. In the method according to the invention as a gas. .developing and hardening Substance formaldehyde used. The method according to the invention is based on the observation that formaldehyde (CH20) in the presence of water and potato flakes, potato flour o. The like. With the application of heat, an extremely fine gas evolution provides, which @es allowed, pressed, porous insulating moldings made of inorganic powdery Insulating raw materials, such as B. kieselguhr, light dust and the like. To produce.
Es ist an sich nicht mehr neu, Isolierformlinge aus Kieselgur, Asbestfasern u. dgl. unter Verwendung von Kaltquellstärke als Bindemittel herzustellen. Ebenso ist es auch allgemein bekannt, aus Stärke und Formaldehyd Preßstoffe herzustellen. Doch handelt es sich bei diesen bekannten Verfahren um die Herstellung von vollen Formkörpern, während gemäß der vorliegenden Erfindung porige Isolierformlinge von geringer Dichte hergestellt werden. Das Verfahren gemäß der Erfindung soll an folgenden zwei Beispielen erläutert werden: Fall I Hochofengichtstaub ioo kg ' Hochofenschlacke, gemahlen ....... 40 kg Körnung 3 bis g m Asbestfasern ....... i kg Kartoffelwalzmehl . . 3 kg Fall II Calcinierte Kieselgur ioo kg . Hochofenschlacke, gemahlen ....... 4o kg Körnung 3 bis 5 mm Asbestfasern . . ..... i kg Kartoffelwalzmehl : . 3 kg Um Isolierformlinge herzustellen, werden die einzelnen Gemische mit einer r o %igen Formäldehydlösung (Handelsbezeichnung: Formalin) leicht angefeuchtet; in .Formen geschüttet und vermittels einer Presse zu den gewünschten Isolierformlingen, z. B. Isolierhalbschalen, rechteckigen oder konischen lsoliersteinen; gepreßt. Der gepreßte Formling bleibt nach dem Pressen f Stunde lang sich selbst überlassen, damit eine gute d gleichmäßige Gasentwicklung eintritt. 71 auf wird der Formling je nach der 71 auf andstärke 3 bis 6 Stunden bei einer Temratur von 6o° C in einem Trockenofen ge-@o@net.In and of itself, it is no longer new to produce insulating moldings from kieselguhr, asbestos fibers and the like using cold swell starch as a binding agent. It is also generally known to produce molded materials from starch and formaldehyde. However, these known processes involve the production of solid moldings, while porous insulating moldings of low density are produced according to the present invention. The method according to the invention will be explained using the following two examples: Case I Blast furnace top dust 100 kg blast furnace slag, ground ....... 40 kg grain size 3 to gm asbestos fibers ....... 1 kg potato milled flour. . 3 kg case II calcined diatomaceous earth 100 kg. Blast furnace slag, ground ....... 40 kg grain size 3 to 5 mm asbestos fibers. . ..... i kg of rolled potato flour:. 3 kg In order to produce insulating moldings, the individual mixtures are slightly moistened with a ro% formaldehyde solution (trade name: formalin); poured into .Formen and by means of a press to the desired insulating moldings, z. B. insulating half-shells, rectangular or conical insulating bricks; pressed. After pressing, the pressed molding is left to its own devices for f hours so that a good and uniform evolution of gas occurs. Depending on the strength, the molding is dried for 3 to 6 hours at a temperature of 60 ° C in a drying oven.
Nach dem Abbinden und Trocknen entsteht Bein außerordentlich leichter Isolierfornrnling, der z. B. bei den angegebenen Mischungsverhältnissen und schneller Arbeitsweise ein Raumgewicht von nur o,6 bzw. o,5 aufweist:After setting and drying, the leg is extraordinarily lighter Isolierfornrnling, the z. B. with the specified mixing ratios and faster Mode of operation has a density of just o.6 or o.5:
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET47531D DE659805C (en) | 1936-10-02 | 1936-10-02 | Process for the production of porous, pressed insulating moldings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET47531D DE659805C (en) | 1936-10-02 | 1936-10-02 | Process for the production of porous, pressed insulating moldings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE659805C true DE659805C (en) | 1938-05-12 |
Family
ID=7562641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DET47531D Expired DE659805C (en) | 1936-10-02 | 1936-10-02 | Process for the production of porous, pressed insulating moldings |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE659805C (en) |
-
1936
- 1936-10-02 DE DET47531D patent/DE659805C/en not_active Expired
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