SU81101A1 - Dual-zone wadding cupola for mineral wool preparation - Google Patents

Description

The invention relates to a double-zone vortex cupola for the preparation of mineral wool with a shaft and a separate furnace for burning low-grade fuel.

A feature of the cupola described is the fact that there is a charge preparation area in the mine. In this zone, the preheating of the material and the evaporation of moisture are due to the heat coming from the gases from both the lower zone and from the specially attached firebox when burning low-grade fuel. The gases from the same furnace heat the air and the combustion of coke in the lower zone of the furnace.

FIG. 1 shows a schematic view of a cupola in a vertical section; in fig. 2 - the same, in horizontal section A-A.

The work process of the cupola is as follows. The charge is loaded into the loading box 1 by opening the top cover of the box with the cone closed at the bottom of the box. After loading the charge, the cover of the box is closed, and then the cone is lowered, and the material enters the preparation area of the charge. In this zone, the charge is heated mainly due to the gases produced in the furnace 2. The gases from the furnace pass through the heaters 3 and through the distribution channel 7 enter the preparation zone of the charge and are removed outside by means of the exhaust fan 4. Blower 5 through pipe 6 and heaters 3 supplies air to the lower zone of the cupola. The amount of air is controlled by a gate 8. The product melts into the tap-hole 9 of the cupola.

As the gas level passes from the distribution channel 7, it passes into the upper zone, where the temperature rises and coke starts to burn.

In the preparation zone, the temperature of the charge should be significantly lower than the coke ignition temperature.

The proposed design of a two-zone cupola compared to existing types of cupolas allows reducing coke consumption to 35Vo, replacing it with low-grade coal, increasing the productivity of the cupola by applying heated air and creating prerequisites for obtaining better-quality mineral fiber.

Subject invention

Dual-zone wadget cupola for preparing mineral wool with a shaft and a separate furnace for burning low-grade fuel, characterized by the distinction in the mine of the primary heat treatment mixture by heating it with heat from flue gases from both the lower zone and a separate furnace during the combustion of low-grade fuel .