SU87306A1 - Method for the production of lightweight thermal insulation and dense forsterite refractories - Google Patents

Description

The main KOMNINENTI when Iroi: -Iud1. fyrstngpieh onie) pores are dunite; or serpentinite.

You are advancing the method of manufacturing. 1) ti |): raw F1 rsterite () of the Kyotok KZ short-circuit waste of asbestos and raw millite and. njiOTiHOio forsterNT;:. 01 (1 refractory material: from crushed 1-grain (Lo,; - territory brick 11).

IlpHMei-rKiH these M: materials (aobest waste and raw maiesite). iipe.iс: it is concealed 1 possible to manufacture P) at the same time two types. For high-quality forsterite products 1: dense forsterite fire elements with the usual HM1-. reusables / and forsterite fireproof lepkovy, agreed on e: 1io, it is necessary for a semi-finished product for the production of p.-ulot forcherite refractories. Magnesite decarb ()) and sir: uatsi, and asbestos dsgmdratir, for example, with one: And the same temperature ature equal to 650 700; at the time of decomposition, the decomposition products are especially acrivious of CONDITION and interact more rapidly with the T1; er; 1gO1 phase.

Asbestos c, natural mikadksnernomny maher.ia / um; its individual fibers can be considered as dispersed colloidyl particles developed in one n-directionalite (one-dimensional co.p.polits). P (1 to the MU the rate of binding of the product dehydrate asbestos in forsterite nrp raw magnesite is greater than with dual serpentine II grains with metallurgical grade magnesium magnesite.

Production of lightweight tenloisolation forsterite flame arresters from the asbestos production of asbestos No. 7 or asbestos dust in the amount of 40--50% and raw magnesite, pre-shredded: not more than 0.54 mm thick to a grain size . in the amount of 60-50,%. The chambers of the mixture are mixed, moistened to 5-6%, dried and calcined at 1350-1400. The resulting material. Characterized by the following MMI indicators:

No. 87306-2 -

fire resistance of approximately 1900

volume veo1,2 g / sls

apparent with porosity 50%

compressive strength 100 kg / slg

The resulting fire retardant is a cheap heat insulating material that can be used under high temperature conditions. Raw magnesite not only accelerates the process of forsterite formation, but also serves as the 0 | D Modern Steam Alternator and the Beneficiary and Soy Supplement.

Pleg form steric refractories are made of porous resin (a) prepared from asbestos No. 7 or waste and raw mainsite in this way. by grinding briquettes into powder with the top, a size of -2 mm, which piaiBHOMepino is moistened in that, IL1 and another kneader and pressed into Kirpici, squeezed after drying at 1500-1550 °.

The forsterite refractories obtained under these conditions are characterized by this, and they are indicated by:

fire resistance approximately 1900 °

| azhu1yaa1 with porosity, 15-20%

volume in-EC2-2-2.6 g / cm

breaking the compressive strength 500-600 kg1cm

These bricks can work in open-hearth furnaces, in Portland-cement “levker roasting furnaces, and in other furnaces at high temperatures.

1. The method of production of lightweight tenloisol pion and dense densitic forsterite refractories, for example, and with the fact that it is easy to get out of work; pylt; and raw pre-crushed mappesite (Mg CO 2) in accordance with 4) to 50%: ak6ecTOBb x 1 materials and 60-50% magnesite, which, after wetting the feathers, are dried, and burned at a temperature of 1350-1400.

2. Acceptance of the process according to the first order, characterized in that. that, in order to obtain dense forsterite refractories, the manufactured briquettes are ground into powder, moistened, and pressed with ordinary spraying into bricks and after drying on the door: secondary calcination at 1500-1550 ° C.