US1292927A - Rotary kiln. - Google Patents

Description

F. TSCHIRNER.

ROTARY KILN;

APPLICATION FILED APR. I3 19!?- 1 ,292,927 Patented J an. 28, 1919.

DEBICK TSOBIBNEB, OF NEWARK, NEW JERSEY, ASSIGNOR TO RICHARD G.

WAGIKB, 0! new YORK, N. Y.

.. norm? mu.

Appllcaflon'fled April 13, 1917. Serial No. 161,852. y e

To all whom it may concern:

Be it known that I, Fnnnnnrox Ts a citizen of the United States, resi a Newark, in the county of Essex and tate of New Jersey, have invented certain new and useful Improvements in Rotary Kilns; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the-same.

The present invention concerns an apparatus for the heat treatment of materials, and is particularly designed for use in connection with the heat treatment of a mixture of greensand, lime sand and salt, in accordance with the process of my copending application filed of even date herewith.

In the accompanying drawing, Figure 1 shows a vertical section of the lower end of the rotary kiln and the connections at the said lower end, and Fig. 2 shows a horizontal section taken on the line 2-2 of Fig. 1, looking downwardly.

In said drawings 10 is a rotary kiln of any desired structure, rotated by a suitable mechanism commonl employed in the art, and which according y it is not necessary to illustrate. The lower end of the said rotary kiln projects into a housing 11, which may be lined with heat resistant and heat in- "sulating material 12, to prevent undue 10$ of heat by radiation.

At 13 is illustrated a burner for heating the material being fed through the rotary kiln, this being for example a gas, coal or oil burner of any approved type: Surrounding the burner and proje toward the 0 en mouth of the kiln 10 is a sleeve 14, w ich may be made of refractory tile or similar material, the function of which is to choke the flame and prevent the same from spreading, so 'thata com 'vel long and narrow flame will be .produce which need not come into direct contact with the material bein calcined in the rotary kiln. Suitable va ves will be provided for regulating the air and gas or air and oil supplied to the burner.

At 15 I have illustrated' another burner, which if desired may be of'a much smaller size than that shown at 13, this burner being for the purpose of-heating the ma erial after passing through the rotary kiln.

The materlal calcined in the kiln 10 drops into the receptacle 16, provided with a gate 17 the material to slowly feed from the com- Speelflmflan 011cm" Patent Patented J an. 28, 1919.- v

partment 16 to the conveyor, and to retain a relatively large body of material in 16.

Receptacle 16 may be made of any suitable fire resistant material, such as t' e, and

the function of this receptacle is to retain the calcined material for a considerable time, in a heated condition, and the burner 15 may be regulated so as to maintain the material in the compartment 16 at the same temperature at which it leaves the kiln 10,

or at slightly higher or slightlylower temperatures, as desired.

The products of combustion from the burner 15 pass around the receptacle 16, may be directed forward and backward by bafiles 21 having openings 22, and may be discharged at 19, and flow into the kiln 10, or these products ofcombustion may be separately drawn off, if so desired.

What I claim is:

1. An apparatus of the character described comprising an inclined rotary kiln, a burner located opposite the mouth of said kiln for heating the same, a receptacle at the outlet end of said kiln for collecting and holding the material coming from said kiln, and means for indirectly applying heat to such material, for maintaining its temperature, while out of contact with direct heating means, and while avoiding rapid rents of gases in contact with the material.

2. In a calcining apparatus, an inclined rotary kiln, a burner located opposite to and at a distance from the mouth of said L mg a flame into the said kiln, in countercurrent with the solid material being calcined therein, and external heating means only for said receptacle.

4. An inchnecl substantially cylindrical rotary kiln, a burner for directin a flame into the lower end thereof, said klhl being connected at its lowerend with a receptacle,

maaeav FREDERICK 'rsomna'nn.

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