Roasting gun device

Abstract

The invention discloses a roasting gun device. The roasting gun device comprises a support, a gun body and a gun head, wherein the middle part of the gun body is of a sleeve structure with an inner layer charged with fuel gas and an outer layer charged with compressed air, a bearing seat for allowing the gun body to rotate around the support is arranged on the rear part of the gun body, and a fuel gas connector and a compressed air connector are formed in the rear part of the gun body; a fuel gas-air mixing pipe and a secondary mixing and decompression pipe for supplementing air and balancing a gas pressure are arranged on the front part of the gun body; the support is used for installing and supporting the gun body and enabling the gun body to rotate and move around an axis in the horizontal direction; a main fire hole is formed in the middle of the gun head, and 18-28 auxiliary fire holes are distributed around the gun head; and the outer layer of the gun head is a heat-collecting cover. According to the roasting gun device disclosed by the invention, a fuel and air are uniformly mixed, air needed for combustion can be automatically balanced, and the temperature of the gun head can be lowered, so that the problems of poor roasting effect and unsafety of unshaped casting material products in scrap copper smelting, and anode copper casting dies are solved.

Description

technical field [0001] The invention belongs to the technical field of baking equipment for industrial copper smelting, and in particular relates to a baking gun device. Background technique [0002] Copper chute, tundish, and casting ladle in miscellaneous copper smelting need to be cleaned and remade the inner layer of amorphous casting material after daily use. The newly made casting material layer contains a lot of water; the surface layer of the anode copper mold contains water before casting And the temperature is low, need to use natural gas to bake. The original baking gun adopts two parallel seamless steel pipes to pass compressed air and natural gas respectively, and the two enter the mixing tube at the front end to mix and then spray out directly. It not only has a bad combustion effect, but also has a large amount of incomplete combustion of natural gas that has spread rapidly to the surroundings, causing unsafe factors. [0003] Chinese invention patent CN8510...

AI Technical Summary

Problems solved by technology

However, since this type of ejection method combustion equipment generally determines the amount of ejected fluid (that is, air) through the flow rate of the ejected fluid, when the ejected fluid or fuel gas pressure is insufficient, or the required amount of air is large , it is easy to cause insufficient combustion and cause waste of fuel

For addressing this problem, prior art generally adopts to add an auxiliary nozzle pipe to improve the amount of ejection dynamics and air (as CN85100053 is just an example), but this has brought new problem again: the air pressure of auxiliary nozzle pipe is not good Control, if the air pressure is too high, the proportion of air in the mixed gas will be large, the heat loss caused by combustion will be more, and it will take a long time to heat and bake to achieve the effect; if the air pressure is too small, the effect of assisting ejection will not be achieved, and the mixing Insufficient air volume in the gas, insufficient combustion

[0004] In addition, the ejecting fluid and the ejected fluid of the prior art burner are mixed in the mixing tube, and then introduced into the diffuser chamber. The length and diameter of the mixing chamber will affect the mixing effect of the fluid. Therefore, in order to achieve good combustion As a result, the volume and mass of the mixing chamber are often large, which is not conducive to the use and transportation of the burner; secondly, the gas in the burner needs to pass through the diffusion chamber, cyclone and other paths before entering the gun head for combustion, and the gas flow area The distance from the gun head is far away, and the temperature of the gun head is high when used. When manufacturing the burner, the gun head needs high temperature and corrosion resistant materials, which increases the manufacturing cost of the burner

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