SU374378A1 - FURNACE FOR HEAT TREATMENT OF PRODUCTS - Google Patents

Description

one

The invention relates to thermal equipment.

A lime kiln for heat treatment of products, comprising a heating chamber, loading and unloading chambers, radiation tubes.

The purpose of the invention is to save tenla during long heat treatment processes.

The proposed device differs from limestone in that the heating chamber is zigzag-shaped with parallel channels, it is equipped with rotating devices for transferring products from the channel guide to another and fans installed in the hearth and roof for aerodynamic heating, and loading and unloading chambers interconnected by a channel for the closed, movement of the furnace atmosphere.

FIG. 1 shows the proposed furnace in 3 projects; in fig. 2 - rotary device with cuts along A-A and BB.

A furnace, for example, consists of an annealing chamber 1, a loading chamber 2, an unloading chamber 3 with pockets for a gate of chrome ore powder. The annealing furnace is made with internal laying of 4 refractory bricks, and the lining is encased in a casing 5.

The beginning and end of the furnace channel from the front side are connected by a canal 6, also laid with refractory bricks with an external hermetic covering made on the top sheet of the furnace. Under channel 7, the inclination has an inclination of 1-2 ° throughout, and the chambers for loading and unloading pallets with products are made with pockets with running water 8.

To separate the loading and unloading chambers from the working chamber in the annealing furnace, the doors are mounted, driven from cylinders 9 mounted in the top sheet of the furnace. The products are moved in a furnace on pallets 10 along guides or roller paths // by means of pushers 12 mounted on the front and rear sides of the furnace, and the transfer of the pallet with products from the annealing chamber to the cooling chamber is performed by pulling unit 13.

The loading and unloading chambers are closed externally by doors 14, which operate from hydraulic actuator cylinders 15 and are equipped with eccentric clamps 16, actuated by cylinders 17, mounted on the sides of the door below. The door under the cam is eccentric 18 through the gasket 19.

All the eccentric levers are connected by a common crossmember 20, which in turn is connected to the cylinder rod 21. When the cylinder moves down, the eccentrics tightly press the door, while the cylinder rod moves

upwards all the eccentrics simultaneously move away from the door plane and it opens.

For transferring pallets with products from one path to another, rotary devices 22 are mounted, making reverse movements. The turntable is performed as follows (see Fig. 2).

In the lower part of the hearth of the furnace, an U-shaped annular recess 23 is made; the annular recess is lined with a continuous sheet at the bottom, in which a semi-circular groove 24 is made. The circle has a pocket 26 for the shutter. This closure prevents the free passage of the furnace atmosphere and creates tightness during rotation of the ring. A column 27 is fastened in the upper part of the ring lining, in the middle of which a tubular frame 28 is mounted, with guides on top for the pallets. The column passes through the groove 24 and a half-ring groove, made in the upper part of the furnace hearth.

The device with a collar and guides is centered by three rollers 29 mounted on the angles 30 attached to the lower sheet of the furnace.

In order to maintain a set temperature in the furnace with a difference of + 10 ° C, better washing of the products with a furnace with an atmosphere, as well as an increase in the efficiency. The furnace uses aerodynamic heating of the furnace atmosphere using aerodynamic fans 31 and 32 mounted in the upper and lower parts of the channel.

Due to the fact that all the fans rotate in one direction, and the channel has a closed loop, the movement of the atmosphere also occurs in the direction of rotation, suppose that the movement of the pallets with products is closed.

For a better advancement of the pallets along the guides or the roller path, they have a slope of 2-3 °. Due to the impossibility of obtaining in the furnace 750-800 ° C only by aerodynamic heating of the furnace atmosphere, it has gas heating with the help of radiation pipes 33.

Radiation pipes can be applied not only metal, but also ceramic otglazovannye, alundum or fireclay. The tapered end of one tube is inserted into the tapered hole of another. The joints of the pipes as well as the places where the pipes pass through the walls are carefully coated with refractory putty to create a tight seal.

Prepared for the heat treatment of the product, laid on pallets are pushed along the roll table to the furnace to the loading chamber.

The cylinder 15 is then actuated, the outer door opens, and the pallet is pushed by the pusher into the loading chamber 2. Next, the cylinder 9 lifts the inner door separating the charge chamber from the annealing furnace, actuates the pusher 12,

the stock of which passes the pressure on the pod and pushes its guiding annealing furnaces behind the inner door, thereby moving ahead of a number of pallets a width equal to the width of the pod. The door closes

until the next boot cycle. The last pallet from the action of the pusher enters the guides of the rotary mechanism 22. The following pusher is installed, mounted on the opposite side, which pushes the pallet from the guides of the rotary mechanism onto the guides mounted in the next section of the channel, etc. using a pusher installed in the outermost section of the channel

A noddon with articles is transferred to the inner door of the discharge chamber and the ejector 13 is unloaded into the discharge chamber, and then from the furnace.

Subject invention

Claims (2)

1. Furnace for heat treatment of products containing a heating chamber, loading and unloading chambers, radiation pipes, characterized in that, in order to increase the efficiency during long-term heat treatment operations, the heating chamber is zigzag-shaped with parallel channels, equipped with rotatable devices for transferring products from guides of one channel to another and fans installed in the floor and in the arch for aerodynamic heating, and loading and unloading chambers dipeny between a closed channel for movement of the furnace atmosphere. 2. Furnace according to claim 1, characterized in that the rotary device for transferring pallets from guides of one channel to guides of another is made in the form of a steel circle with a pocket for sealing and with an upper ring lining, on the upper part of which there is a sector column with guides for receiving pallets going out vutr furnace through a semi-circular groove in the lining. A-l 31 1i7 18 11 l 5 3 Fig 1