Patent EA-004095-B1 (EA)
Title: Method for continuos production of decorative facing slabs and a device for carrying out said method, decorative facing material
IPC: C03B19/06
Filed: 2001-03-19
Abstract: 1. A method for continuous production of decorative facing slabs based on colour glass pelletizer and refractory filler, said method including: loading basic components into casting moulds, followed by thermal treatment in a furnace at a temperature of 900 degree C to 950 degree C to fuse, bake and crystallize them, and then reducing the temperature prior to firing and subsequent firing, characterized in that said casting moulds are placed into an open heat-insulated pallet which, after the thermal treatment at a maximum temperature, is pushed out of said furnace and conditioned at an ambient temperature for as long as 80 to 90 seconds to cool the faces of said slabs down to 600-634 degree C, whereupon said slabs are placed into a closed, heat-insulated space having a thermal resistance of walls that ensures cooling the faces of said slabs down to 100-140 degree C at an average cooling rate of 0.016 to 0.020 deg/sec. 2. A device for continuous production of decorative facing slabs based on colour glass pelletizer and refractory filler, said device comprising: a bell furnace, casting moulds placed into heat-insulated pallets provided with heat-insulated covers forming, when in contact with each other, a tight connection, a means for step-by-step conveying of the pallets, and a mechanism for forcing said pallets to said bell furnace, characterized in that said device is further provided with a manipulator for taking said cover off said pallet in which said slabs have undergone thermal treatment and for putting said cover onto the open pallet just leaving said bell furnace, and a set-point control means for setting the time interval when to put said cover onto said open pallet, said means for step-by-step conveying of said pallets being implemented in the form of a closed-loop open horizontal conveyor. 3. The device according to claim 2, characterized in that said manipulator comprises a trolley provided with a drive and capable of horizontal reciprocation, a frame having restricting guides and capable of reciprocation in a vertical direction, and a vertical motion drive. 4. The device according to claim 2 or 3, characterized in that said manipulator further comprises curved tie-rods with grips which are pivotally connected to said frame and to said vertical motion drive. 5. The device according to claim 2, characterized in that said casting moulds for the thermal treatment of a basic mixture are made from quartz ceramics. 6. The device according to any one of claims 2 or 5, characterized in that the width of heat insulation around the perimeter of said heat-insulated pallet is at least 5 times as large as the thickness of said slabs. 7. The device according to any one of claims 2, 5 or 6, characterized in that the ratio between thermal resistance of heat insulation around the perimeter of said heat-insulated pallet and at the centre thereof is 2.8 to 3.0. 8. A decorative facing material based on colour glass pelletizer and refractory filler, produced in accordance with granule-powder technology, by a baking method with subsequent crystallization and burning, in the form of slabs with actively irregular internal surface, characterized in that the face of said slabs is made such that it is irregular, with a maximum microroughness height of 27 to 1560 microns which is obtained directly in the process of thermal treatment. 9. The material according to claim 8, characterized in that the face of the same slab simultaneously contains areas having different roughnesses. 10. The material according to claim 8 or 9, characterized in that the face layer of said material contains 15 to 100 wt.% refractory filler. 11. The material according to any one of claims 8 to 10, characterized in that said face layer has a thickness of 1 mm to 20 mm. 12. The material according to any one of claims 8 to 11, characterized in that, as said refractory filler, use is made of quartz sand, alumina, granite aggregate with particle size of 0.15 to 1 mm.