SU146042A1 - Tubular inclined continuous furnace for the production of refractory metal carbides - Google Patents

Description

Horizontal furnaces used in industrial practice for producing carbides of refractory metals are inefficient; their maintenance is costly; the lack of sealing of the loading and unloading device negatively affects the quality of the products and leads to excessive consumption of fuel and hydrogen.

To eliminate these drawbacks, the oven described is sealed; The charge is loaded as a continuous hollow briquette; The position of the furnace helps to promote the material under its own weight.

FIG. 1 shows a furnace in longitudinal vertical spacing; in fig. 2 is a discharge device (section along BB in FIG. 1).

The furnace consists of the following main parts: a metallic inclined housing 1, a loading and unloading device and a refrigerator. The furnace is hinged on frame 2, which allows it to be given any angle of inclination. Inside the ceramic furnace base 3, graphite blocks 4 are laid with through- and channels 5 with lining 6 of tungsten or carbide rings. Fram. Graphite heaters are placed in graphite chambers. The remaining space is filled with soot. The hopper 8 includes a hopper 8, a feeder 9, a mixer 10 with a mixer // and a humidifier — chamber 12 of a screw press 13 with a needle 14 and a heater / discharge device consists of two chambers: a small chamber 16, fed to the refrigerator 17, and a large chamber 18, which are equipped with a flap 19. Inside the small chamber, a baler 20 and a reloading auger 21 are installed, inside a large one - unloading 2- The valve 23 is connected to an air cylinder 24№ 146042-2. The furnace operates in the following order.

Before starting work, the hopper 8 is filled with bristles, ensuring the furnace is sealed from the side of the charging device, and the gate 23 is closed, located at the exit of the large chamber and creating a sealing of the furnace from the side of the discharge device. The furnace is purged with hydrogen and then put on heating. When the required temperature is reached, a feeder 9, a broomstick // and a screw press 13 are included. Moisturized with an aqueous solution of molasses and transferred to the mixer, enters the screw press chamber, compacted, turning into a continuous hollow briquette, which, as it advances, is compressed and fed furnace space for carbidization followed by cooling and crushing.

The opening and closing of the shutters, the unloading and transportation of the blasters are automated by means of sensors, the excitation of which is produced by the processed products.

Subject invention

A continuous inclined furnace for producing carbides of refractory metals, such as tungsten, titanium and others, in order to combine the processes of feed, wetting, pressing, pressing and briquette, the furnace is equipped with an electric heating chamber for briquette essences, shnekovy.m by press for obtaining: an empty briquette and a paddle mixer connected to the npi pg-gosch bunker of the feeder, and the discharge part of the furnace is connected to the crusher using a cooler, ennoy in a small airtight chamber connected with bolschoy hermetic chamber provided with schlyuzovym gate operating by pneumatic, automatically actuated by means of sensors, which produced the excitation processed products.