METHOD AND DEVICE FOR MANUFACTURE OF POROUS VITRIFIED BLOCK Russian patent published in 2014 - IPC C03B19/08 C03C11/00 

FIELD: construction.

SUBSTANCE: method and device for manufacture of a porous vitrified block may find application in construction for manufacturing of large-block heat insulation and wall structures and as fillers of light concretes. Previously, for instance, with the help of a mass spectrometer they determine chemical composition of granulated quartz-containing charge, and on the basis of the chemical composition they calculate petrochemical coefficient of alkalinity, then the quartz-containing charge evenly and with constant speed is supplied to the zone of heating, in which under action of thermal shock the charge granules are mixed, foamed and heated to temperature, the foaming temperature T_"огн" in the zone of heating is provided in accordance with the formula T_"огн"=2781.5-974.7 PAC, where PAC - petrochemical alkalinity coefficient, in the period of appearance of liquid glass phase on the surface of granules they mould a porous vitrified block, in the beginning of crystallisation the mould with filled foamed granules is removed from the heating zone, crystallisation is carried out, reducing temperature with the speed of 15-20°C/min to the sintering temperature T_sint, which is determined according to the formula T_sint=2364.3-873.4 PAC, and is maintained at the specified temperature of 10-60 minutes for fixation of the produced porous structure of the moulded block, then the block is cooled and exposed to isothermal maintenance for 8-60 minutes at baking temperature 400-650°C, afterwards the mould with the block is cooled to temperature of 70°C and taken out from the mould. To realise the method, the device comprises a thermal unit made of two reservoirs installed in series and connected to each other in the top part with a channel. In the first reservoir there is a heating zone with an orifice for supercharge of heated compressed air and/or nitrogen and inert gases. The second reservoir is made of two parts separated with a gate valve. The upper part of the second reservoir is designed to accumulate and deposit granules foamed in the first chamber, and the lower one - for mould installation. A furnace, for instance, a tunnel furnace, is installed in series with the second reservoir. The furnace is connected to the second reservoir with the help of a mechanism for extraction and feeding of the mould and comprises three serial zones. The first zone - zone of sintering of foamed granules, the second zone - zone of cooling of a porous vitrified block to temperature of glass phase baking, and the third zone - zone of cooling down to 80-70°C. All zones are connected to each other with a mechanism for movement of moulds.

EFFECT: increased efficiency and effectiveness of manufacturing of porous vitrified blocks and their improved quality.

6 cl, 1 dwg, 1 tbl, 5 ex