SU509540A1 - Installation for producing oxides of cadmium - Google Patents

Description

I

The invention relates to devices for the production of cadmium oxide, wyclys, the main component of active cadmium masses used in the manufacture of batteries.

A device for producing cadmium oxide is known, including a furnace, a submersible retort with a fin and a nozzle on which the burner is mounted, and an oxidizing chamber connected to a filter and a fan. The fin is installed outside the retort and is connected to it through a water lock.

However, in such an installation, the location of the fin outside the furnace leads to additional heat loss, i.e., the productivity of the installation decreases. Upon receipt of the fine cadmium oxide, the plant performance also decreases sharply,

The purpose of the invention is to increase plant productivity and produce cad oxide; mn required dispersion. I It is achieved that in the proposed installation, the fin is reinforced vertically j inside the retort on its lid, and the oxidizing chamber is equipped with a partition {separating it into sections, each of which is provided with a flap located in the upper part of the section.

FIG. 1 shows the scheme of the installation described, general view; on fi. 2 - a removable burner with an annular neck (section along A-A in Fig. 1).

The installation consists of a furnace 1, an oxidizing chamber 2 connected to a bag filter 3.

In the furnace 1, a submersible retort 4 is installed with a lid 5 and a fin in, equipped with a different 7 throat and a branch pipe 8 in its lower part. Electric heaters 9 are located on the inner walls of the furnace 1. To release the cadmium vapor from the submersible retort 4, there is a nozzle 1O in its cover 5, at the outlet end of which a screw 1J. a gas burner 12 is fastened consisting of a funnel 13 and a housing 14 with a gas inlet 15 installed on it, such as methane,.

The oxidizing chamber 2 is divided by a vertical partition 16 into two sections: the main 17 with a funnel 18 for the entrance of cadmium vapors and an auxiliary 19, Sections 17 and 19 are fitted in the upper part with adjustable dampers 20 and 21.,

In the lower part of the oxidizing chamber 2 there is a funnel 22 for the entry of air.

The oxidizing chamber 2 with the aid of a collector 23 and duct 24 is connected to a bag filter 3, for example of the type FVK equipped with a discharge device 25.

The installation works as follows

Metallic cadmium is loaded into the retort 4 through the throat 7 into the fin 6, where it melts due to the heat, transmitted through the fin wall 6, the working temperature in the retort is 76 ° C, i.e., the boiling point of cadmium. To reduce heat loss and surface oxidation of cadmium, the temperature in fin 6 is maintained within 400-50 ° C i by heat insulating the walls of fin 6.

Molten cadmium through pipe 8 flows into the retort 4, where it evaporates. Cadmium vapors at port 1O exit from submersible retort 4 and through a funnel 18 enter the main section 17 of the oxidative chamber 2, where cadmium vapors are burned to form cadmium oxide.

(The air required for cadmium oxidation is drawn in through the funnel 22 of the heat transfer chamber 2 by means of a fan.

The dispersion of cadmium oxide depends on the temperature in the combustion zone, which is regulated by the change in the amount of air passing through sections 17 and 19, with the help of dampers 20 and 21.

Gas, such as methane, is supplied to the burner 12 and burns to form an annular torch protecting the end of the outlet 10 from air.

The finished product is a collector 23 and the air duct 24 is pneumatically transported into a bag filter 3, is picked up by it and removed through the discharge device 25 from the installation.

Claims (1)

Invention Formula An installation for obtaining cadmium oxide, which includes a submersible reurette with a fin and a branch pipe, on which a burner with an annular slit is installed, and an oxidizing chamber connected to the filtering and fan, which, in order to increase the capacity of the installation and obtain the oxide required the fineness is covered vertically inside the retort on its lid, and the oxidizing chamber is equipped with a partition dividing it into sections, each of which is equipped with a damper located in the upper part of the section.