SU867913A1 - Mixture for making heat-insulation articles - Google Patents

Description

-, The invention relates to mixtures prior to the manufacture of heat insulating products and can be used in the building materials industry; -

LOV. ..,:. .

Nowadays, shamotokerka in fuzzy, perlitokamericheskimi, fibrous and: other refractories are used for high-temperature insulation.

A known mixture, comprising 85-92% kaolin fiber, 5-10% fibrous asbestos and 3-5% emulsion surfactant

The disadvantage of this mixture is a decrease in the strength of the products from it when the bond is burned out.

A mixture of 55-60% ceramic fiber, 40-55% phosphoric acid f23 is also known.

The products obtained from this mixture have a significant bulk density due to the interaction of the fiber with an acid, a crumbly structure and require expensive equipment for the manufacture.

Closest to the present invention is a mixture for the manufacture of insulating products, including high-temperature inorganic fiber and refractory clay. 5In the high-temperature

the inorganic fiber mixture contains kaolin fiber in the amount of 75%, and as refractory clay Hours-Yarskaya clay in the amount of O 25% G32.

However, products made on the basis of this mixture are expensive and have a significant bulk density.

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The purpose of the invention is to reduce the cost and bulk density of products while maintaining their Flexural Flexibility.

 This goal is achieved by the fact that the mixture for the manufacture of heat-insulating products, including high-temperature inorganic fiber and refractory clay, additionally contains raw and / or solid waste perlite9 ceramic production and polyacrylamide in the following ratio of components, wt.%: High-temperature inorganic fiber 30 -75 Refractory clay5-27 Raw and (or) hardened waste of perlite-ceramic production5-42 Polyacrylamide 0.05-0, Waste of perlite-ceramic production, so-called Plates (perlite), are waste molding material formed during the molding of plates, as well as semi-finished perlital plates, which cracked and broke when they were removed from the drying trolleys. The amount of waste reaches an average of 12% of the total output of perlital plates and is largely due to the heterogeneity of the chemical and mineralogical composition of the natural clay raw materials and the high sensitivity of the gash to drying modes. Composition of perlite-ceramic production wastes, wt.%: The clay of the Chasov-Yarsky or Druzhkovsky deposits is highly paste49 49 86 The expanded perlite sand of the Aragats field 49, 86, 4 Carbamide resin 0.12 Sodium sulfate 0.16 Clay containing after immersing the latter in water, completely restores its binding properties. For the manufacture of heat-insulating products, the dosed components are mixed with water at a solid-liquid ratio of 1: 8 to 1:15 (1200–2000 liters per 1 m of products until a homogeneous pulp is obtained, and from the latter is molded (products are pressed. Molded products exist at 200–300 s). then, if necessary, burned at 9001250 ° C, depending on the temperature of their use. The products obtained on the basis of the proposed mixture have a uniform structure and can be used as a working heat layer of heat-lined lining of heat-treating furnaces. Inorganic fiber can use any inorganic fiber: kaolin, high alumina, silica, mineral, ash, etc., as well as their mixtures. Examples of specific compositions are given in Table 1, their physico-mechanical properties are in Table 2. The economic effect from the application of the proposed mixture is obtained by reducing the consumption of expensive and scarce high-temperature inorganic fibers. T al.

High temperature inorganic fiber:

75 30

52

alumochromosilicate

ten

75

thirty

52.1. 75

52

Claims (1)

Claim A mixture for the manufacture of heat-insulating products, including high-temperature inorganic fiber and refractory clay, with the fact that, in order to reduce the cost and bulk density of the products while maintaining their bending strength, it additionally contains raw and with (or) cured wastes of perlite-ceramic production and polyacrylamide in the following ratio of compo. nents, wt.%: High Temperature Inorganic Fiber Refractory Clay VNIIIPI ___ Branch of the RFP Raw and (or) solidified wastes of perlite-ceramic production Polyacrylamide 45. 5 ^ 42.8 0.05-0.2