DD275581A3 - Method for producing minerallschen materials for moldings of high-pressure chambers - Google Patents

Abstract

The invention relates to a method for the production of mineral materials for molded parts of high-pressure chambers. The invention finds use in high-pressure, high-temperature technology, in particular for lining and sealing high-pressure chambers for the synthesis of super-hard materials, such as the synthesis of diamond, cubic boron nitride and polycrystalline diamond bodies. The object of the invention is the development of a molded body, which can make targeted and optimally adjustable by suitable composition, the plastic and mechanical properties depending on the requirements of the respective high-pressure apparatus. The inventive solution is characterized in that phyllite, fruit shale or serpentinite with less than 40% quartz content, a clay with a minimum content of 35% of a swellable Montmorillonit-Muskovit-Wechsellagerungsminerals at 50% -80% is added and mixed with known binders. The material produced has very good electrical and thermal insulation properties and has the advantage that the mechanical support and flow behavior can be varied according to the composition.

Description

-I- i75 581

The mixture of said components, consisting of the listed particle size classes is a AnmachflOssigiceit

added, from the usual materials in the ceramics industry, in particular PVA solution, sulfite waste liquor or water glass

can exist. When using water glass, the mechanical strength of the molded parts produced by a

Carbon dioxide fumigation can be additionally increased. The mass preparation or the production of the grain fractions is carried out according to the usual in the ceramic industry Technologies including the different granulation methods. The shape of the masses is with those in fine ceramics

known pressing technologies possible. It creates a material with the significant advantage that in addition to its very good

electrical and thermal insulation properties the mechanical support and flow behavior according to the -

Composition can be varied. Further advantages are the constantly available domestic raw materials and the uncomplicated production. The material is

preferably suitable for the synthesis of diamonds in belt equipment.

exemplary The invention will be explained in more detail with reference to an embodiment. Crushed and dried Friedländer clay containing about 45% of an irregular montmorillonite muscovite Was stored on a grain size spectrum of

10% smaller than 0.2 mm

65% 0.2mm-0.4mm

15% 0.4mm-0.63mm

5% 0.63 mm-0.8 mm

S% 0.8 mm-1 mm

classified.

The clay is added 20% of a fruit slate with the same particle size distribution and mixed with PVA solution, so that a plastic mass is formed, which is pressed by conventional Feinkeramiktechnologie to form sealing bodies. By using the material according to the invention, the synthesis of diamond is reliably possible.

Claims (2)

claims: 1. A process for the production of mineral materials for moldings of high-pressure chambers, characterized in that phyllite or fruit shale or serpentinet with less than 40% quartz content at a minimum content of 35% of a swellable Montmorillonit-Muskovit-change storage mineral to 50% -80% is added and mixed with ah known binder. 2. The method according to claim 1, characterized in that the comminuted materials coming to the mixture form a mixture of particle size classes less than 1 mm and are classified by sieving or granulation. Field of application of the invention The invention relates to a process for the production of mineral materials for molded parts of high pressure chambers, which are used in the high pressure / high temperature technology, in particular for lining and sealing of high pressure chambers. Characteristic of the known state of the art The known processes for the production of mineral materials for the lining of the reaction space of high-pressure chambers, as well as the sealing of the reaction space, in particular the Belt / types, are usually based on the monomineralic natural raw materials pyrophyllite, talc, catlinite (lithographic stone) and paragonite, which in an unmodified type in its unaltered natural form are used (see US / PS 3030662; US / PS 2941248; US / PS 4340576; US / PS 4301134; US / PS 2918699; DE / AS 2523068; DE / AS 2600395; DE / AS 2106086; 00 / WP 217718; B 01 j 254532; B 01 j 254533). The tasks of the seals and the reaction space lining are to electrically isolate the pressure vessel, seal the reaction space, support the die and die, and transfer the force from the die to the pressure space. The disadvantage of all technical solutions known hitherto is that it is impossible or very imperfect to match or optimize the different and opposite required properties such as deformability, pressure transfer, flow behavior, sealing and supporting effect. A change of certain fixed sealing material properties, which are based on the natural mineral properties, could not be achieved to a sufficient extent, since the mineral properties are not changeable. Object of the invention The object of the invention is to provide a material for moldings of high-pressure chambers using domestic raw materials, which has improved properties and can be produced with conventional technologies at very low processing costs. - * Presentation of the essence of the invention The essence of the inventive task is to produce a material in the form of a mineral material compared to the previously known materials for lining high-pressure chambers, which is enabled by suitable composition, the plastic and mechanical properties depending on the requirements of jeweiligerwHochdruckapparatur targeted and optimally adjustable to design and fulfill the conditions of a fully automatic production process. According to the invention, this object is achieved by adding to phyllite or fruit shale or serpentinite, each containing less than 40% quartz content, at least 35% of a swelling montmorillonite-muscovite intercalating mineral containing 50% -80% clay mixed with a per se known binder , The comminuted materials coming to the mixture advantageously form a mixture of particle size classes smaller than 1 mm and are classified by sieving or granulation. The components metamorphic rock and clay consist of a mixture of one, three or five groups of different grain size classes, which are smaller than 1 mm. In the case of only one group, the components consist of a particle size class of 0.1 mm to 1 mm, in the case of three groups of a first group of 0.2 mm to 0.4 mm, a second group of 0.4 mm to 0.63 mm and a third group of 0.63mm to 0.8mm, with 50% -80% in the first group, 10% -25% in the second group and 10% -25% in the third group, and groups in the fifth a first group smaller than 0.2 mm, a second group from 0.2 mm to 0.4 mm, a third group from 0.4 mm to 0.63 mm, a fourth group from 0.63 mm to 0.8 mm, and one fifth group from 0.8mm to 1.0mm, with in the first group 5% -15%, in the second group 20% to 55%, in the third group 15% to 50%, in the fourth group 10% to 20% and in the fifth group 5% to 10% share are included.