RU1796854C - Ring furnace - Google Patents

Abstract

Use: for the manufacture of products from expanded material. SUMMARY OF THE INVENTION: An annular furnace comprises a rotary hearth made of trapezoidal elements separated by U-shaped transverse stops installed in guides placed on the sides of the hearth platform. In the zone of unloading products, the furnace is equipped with a vibrator and an ejector. In addition, an annular refrigerator divided into cells is placed around the furnace. 2 s.p. f-ly, 3 ill.

Description

The invention relates to the building materials industry, in particular the production of porous ceramic products (plates and blocks) by the expansion of water-containing volcanic glasses, tuff waste, volcanic ash, siliceous opal rocks, fusible clays and other rocks.

A known foam glass furnace in which a foam mass is formed on a conveyor belt. Upon exiting the furnace, a continuous ribbon of glass enters the annealing channel, and then is cut to the required length. However, with belt conveyors, heat losses are observed due to repeated heating and cooling of the conveyor during each cycle.

A ring furnace for the production of porous products is also known, comprising a rotary hearth driven heating system.

Under the furnace, it is made in the form of a ring-shaped bath. The bathtub is filled with a melt, on the surface of which a calcined material is placed. The melt layer separates the calcined material from the lining, preventing it from sticking and facilitating the unloading of the finished product. However, the firing of the expanded material in this furnace is accompanied by large losses of heat used to heat the melt. In addition, the furnace has a low productivity since firing is carried out in a small layer.

The purpose of the invention is to increase productivity, reduce fuel consumption and labor costs of porous ceramic products.

This goal is achieved by the fact that in a ring furnace containing a lined rotary hearth with a drive, the heating system rotating underneath is made of trapezoidal elements separated by U-shaped transverse limiters installed in guides placed on the sides of the hearth platform and supported by flexible elements . In addition, it is equipped with a vibrator and product ejector installed in the discharge zone and a coaxially located refrigerator divided into cells.

Fig. 1 shows a ring furnace in plan; figure 2 is a section aa in figure 1; Fig. 3 - design of a limiter,

The annular furnace consists of a hearth 1, including a platform 2, a lining 3, trapezoidal metal elements A and limiters 5, supported by elastic elements, for example, springs 6, supporting-support system 7, heating system 8, hydraulic locks 9, a vibrator 10, equipped with a frame 11 and rods 12, a product ejector 13 from the furnace, a semi-finished product hopper 14, a release powder hopper 15, an annular refrigerator 16, the working surface of which is divided into cells 17, an ejector 18 (for supplying products to the refrigerator) ..

The firing unit operates as follows.

On the hot surface of the hearth 1, made of trapezoidal cast-iron elements 4, from the hopper 15 serves a layer of anti-adhesive powder (thickness up to 2.0-0.3. Mm), and from the hopper 14 with a dispenser - a layer of semi-finished product (granules) with a thickness of 20-25 mm and during the rotation of the hearth to the hopper 14, the pellets are expanded and welded together and an expanded porous mass of 35-40 mm is formed. A second layer is poured from the hopper 14 onto the expanded mass and, having expanded it, is welded with the lower layer, forming a porous mass 19 up to 70-80 mm thick. If necessary, to obtain products with a thickness of more than 70-80 mm, additional hoppers for the semi-finished product are installed on the ring furnace. Thus, the furnace channel

Claims (3)

SUMMARY OF THE INVENTION 1. An annular furnace for the production of porous articles comprising a lined rotary under-drive with a heating system, characterized in that, in order to increase productivity, reduce fuel consumption and labor costs, the rotary under is made of trapezoidal elements, is divided. U-shaped transverse limiters installed in the rails, divided into several firing zones (by the number of fired layers). At the end of the ring furnace, the products are cooled to 700-750 ° C by blowing cold air into the channel. At the outlet of the furnace, the limiter 4 is vibrated with a vibrator 10 through the frame 11 and the rods 12 to separate them from the trapezoidal products (plates). Next, the removal of products using the ejector 13 (chain with blades or others) and their transfer along a metal tray to the roof of the ring refrigerator 16. With the pusher 18, articles from the surface of the tray from a horizontal position are pushed against cells 17 of the hearth of the ring refrigerator 16 and are cooled in a predetermined mode in a vertical position. After cooling, the products at the end of the refrigerator are removed and subjected to processing - cutting according to the nomenclature. . Semi-finished product (granules) for the production of porous ceramics (foam) is made from water-containing volcanic glass, tuff waste, volcanic ash, siliceous opal rocks by drying them, Iomol in a ball mill with a blowing agent (soot, etc.), then they are mixed in a mixer with alkaline solution and granulation on a dish-shaped granule torus. Obtained by this technology, the semi-finished product in the form of monolayers of coarse sand or small granules is fired in the proposed firing unit. ..; .Application of the proposed design reduces production sites, reduces specific fuel consumption by 30-40%. . . .-. ..-, placed on the sides of the platform, the hearth and supported by flexible elements. 2. The furnace according to claim 1, characterized in that it is equipped with a vibrator and an ejector of products installed in the product unloading zone. 3. The furnace according to claim 1, characterized in that that it is equipped with a coaxially arranged refrigerator divided into cells. ...- Figz