DEP0040494DA - Process for the production of solid, porous building and insulating moldings - Google Patents

Description

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possible to make adhesion of the combustible material to the mold and prevent au a mehrmalig® using the same! shape _s are the further invention, the inner walls of the internal forms pure accordance with a sand mixture, 2! _β Ββ! Conveyor sand and organic glue »such as bone glue, gelatine, Βο ^ θΐ ± ητΗΕί1 & *« 1 ± ϊϊτ ~ δ ± β3ι ^ 1 «1ιη: coated j the mixture can be added 5" to 10 $ refractory ϊοη "«

Instead teftimen the inner wall of the internal © forms even with a slurry of Sonerdehydrat, optionally with the addition of ground chamotte, poured in such a way and are subsequently emptied _f that a 1 to 2 mm thick © layer of the slurry adhere to the walls bleibte

A further shortening of the burning and expanding process is based on a statement by the inventor about the transformation processes of the iron oxides. The expanding process can be traced back to the development of oxygen gas ₉ which is caused by the spontaneous conversion of trivalent ones at 1100 ° to 1200 ° set in freedom in 2-valued sisen This creates from

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Even the conversion of a small amount of the Bisenoaydsy present in the raw material is sufficient to produce a product with a weight of 0 _f 5 to 0 _p 7 g / cm ^5. On the other hand, too strong and sudden reduction leads to undesirable high percentage of two-valent iron "which acts as Hußmittel and the toughness of the melting © significantly decreased Me small © asbläsehen _s which pore formation cause ^ then graining is su sizes bubbles collect * so that creates a technically worthless product.

According to the further invention, therefore, the firing takes place in an oxidizing atmosphere, preferably in one with an excess of air of 30,56 or more * Sin such excess air. is already useful when heating up ₉ to "oxidize the divalent iron to trivalent iron" originally present in the raw material

It is known that in the firing of clays containing iron oxide

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Atmosphere Bläkersehe iawigea appear _? and @s was called ffiitt «! To avoid the undesired development of the problem, it is recommended to use an oxidizing atmosphere »Your invention is obviously not inferred from this exercise»

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Oil aconitifiröher foa Tom Uelsenea? Ebhenztig «Grafschaft Eeiit« _s with f®Xgead @ r tasektivenetsungt 66> ® ^ SiOg? 11.0 ^ ₃₉ 14fO # A ₂ O ₅ + FeOt 0 _f fj £ 0aO, 2 _S 3 j6 IgO ₉ β, Ι? S ^ O f _f 9 ^ dlühYerlust is in a S0hlemd © rmtlhle hom © g «- aized and Reduced piping measure "is filled into a © Sohamottefona" whose found © "± t" in a coating of? 0 ^ ground sehamot © and 50 $> special hydrate Tersehen are _# and then in a! Eumielofe "with a strongly oxidizing atmosphere for 6 hours Seger cone 8 burned "the fired product is ground smooth on the surface," the molded block thus prepared, has a Eaumgewieht "clay from 0.6 to 0 ₈ 7 g / esr ταΑ a Brußkfestigkeit TOAE 50 to 7Q Om at a EorengrSß® tone 1 to 2 practice"

Claims (1)

le) What about the production of solid, porous structures and insulating moldings from iron oxide-containing silicates, especially slauconite _? Celadonitp JJLaunschiefer _{? F} Qbisi & ian * characterized in that dl © silicates are baked in molds made of chamotte and in the ßestalt accept the surrounding forms " 2 «) Method according to claim 1» characterized * that the silicate © ror the burning of a fine comminution under » 3 «) Terfahren according to Claim I _9, characterized in that the silicates are homogenized in terms of grain size and composition * 4- ») Terfahren according to claim 1 to 3» uaaux-cxi geicenasexcn »net _s that the burning takes place in an oxidizing atmosphere, 5e) Method according to claim 4 "characterized ₉ that the excess air during the firing is $ 50 and more" 6 “) Method according to claims 1 to 5? characterized in that the inner walls of the furnace molds with a mixture of pure sand (3? ör der sand) and organic _{glue 9} such as bone glue * Gelatin © _s ^ θ! ^ γο ^ ± Κγγ ^ ΪΑι314ώ ^ - "Μ '© & @ 1 ^« ± μ u, a. _e with or without an addition of 5 to $ 10 fire clay coated werden® 7 *) Terfahren according to claim 1 Ms 5 ₉ dadureh characterized in that the inner walls of the firing molds with an iLufschlSaaung clay fonerdehydrat @ s ₉ optionally with the addition of ground chamotte _{9 are} poured and then emptied that a 1 to 2 mm thick layer of the slurry on the Walls stick "