SU29135A1 - Drywall Furnace - Google Patents

Description

To obtain high-quality alabaster without direct effect on gypsum fire, a cooking method is used in special boilers, which require frequent replacement of the latter (due to burning), crushing and grinding raw gypsum, which greatly complicates production and high energy consumption both for grinding and pas mixing. gypsum in digesters. The proposed blasting furnace is designed to avoid all ethn flaws in obtaining a product of appropriate quality.

In the drawing of Fig 1 depicts a vertical section of the furnace; FIG. 2 a horizontal section along line 4B in FIG. one; FIG. 3 is the same along the lines of CD in FIG. one; FIG. 4 is the same along the line EF in FIG. one.

The proposed furnace consists of a cylindrical chamber A (Fig. 1), lined with chamotte, inside which there are four round shafts D, also of chamotte brick. The conical part of the cup is a preheating and firing zone, and the lower, cylindrical - cooling zone.

The shafts B, loaded with a hype, are provided at the bottom with the known unloading devices in the form of fist wheels C: teeth. Marked Buckwheels

through a bevel gear and counterdrive D with stepped pulleys, is driven into rotation by an electric motor S (Fig. 3).

Channels Y and Q with windows K are used to enter combustible gases into chamber A from the generator E, and they exit through the central departure L (Fig. 4) leading to the cruciform channel in the ceiling of chamber A and from here through the outlet channels M and the lower annular channel and (fig. 1) to the smoke exhauster.

To enter the warmed air from the mine area, departures I are intended, leading to a cross-flow hearth channel H, opening into chamber A with a window T.

The finished alabaster is unloaded from the furnace using a plate conveyor / (. 1).

The temperature distribution in the furnace is as follows: in the combustion zone -1000 °; in the channels K-300 °; in the alabaster roasting zone, 200 °; at wheels C-40 °. Additional air is controlled by the exhaust fan.

The subject matter of the invention.

A gypsum burning furnace, characterized in that its four burning mines are loaded with plaster from above and

provided below with known exhaust devices in the form of fist-wheels, placed in a common heating chamber, closed at the top, chamber A, for entry into which combustible gases, from generator E serve channels V and K, for introducing heated air from the cooling zone of mines departures .R, R. . . leading into

a cruciform bottom channel // opening into chamber L by window T, for the gases departing from chamber A, a central departure L is intended, leading to the cruciform channel in the chamber overlap and from here through exhaust channels M and the lower annular channel U-to the exhauster.

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