Cyclone concentrate spray nozzle

Abstract

The invention discloses a cyclone concentrate spray nozzle, which comprises a material conveying pipe, wherein a center oil gun is coaxially arranged in the material conveying pipe, an air chamber is fixedly arranged at the outer side of the material conveying pipe, and is in an inverted truncated cone shape, a cyclone bird nest water jacket for forming cyclonic air is fixedly arranged at the lower end of the air chamber, a material conveying pipe outer layer for providing cooling air is arranged at the outer side of the material conveying pipe, a cyclone pipe for forming cyclonic air is fixedly arranged at the lower ends of the material conveying pipe and the material conveying pipe outer layer, the cyclone bird nest water jacket is arranged at the outer side of the material conveying pipe, an air outlet is formed by a gap between the cyclone bird nest water jacket and the the material conveying pipe, the directions of rotary air formed by the cyclone bird nest water jacket and the cyclone pipe are the same, and a high-speed rotary flow field is formed at the combining part of a material outlet. The cyclone concentrate spray nozzle has the advantages that by arranging the two cyclone mechanisms, the two types of cyclonic air are combined, the concentrate and reaction gas can be fully mixed, and the smoke dust rate is reduced; by increasing the negative pressure value at the material outlet, the problems of air returning and material returning are effectively reduced, and the production capacity of concentrate feeding is improved.

Description

technical field [0001] The invention relates to a concentrate nozzle, in particular to a cyclone-type concentrate nozzle suitable for copper, lead, zinc, nickel and other heavy non-ferrous metals using powdery concentrate for space smelting reaction. Background technique [0002] The concentrate nozzle is mainly used for the flash smelting process of metal copper (nickel), which is installed on the top of the reaction tower, and the dry concentrate copper, solvent and process air are sprayed into the reaction tower through the concentrate nozzle, and the concentrate and reaction gas are fully Mixed, burns rapidly, oxidizes to form slag and matte. Therefore, the uniformity of the mixture of the concentrate and the reaction gas plays a decisive role in the oxidation reaction of the concentrate. If the mixture is not good, some unreacted materials will fall into the sedimentation tank, forming the phenomenon of "lower raw material", resulting in the reaction tower furnace The ...

AI Technical Summary

Problems solved by technology

However, with the continuous increase of the production capacity of the reaction tower and the continuous increase of the smelting intensity, the occurrence rate of abnormal conditions such as middle and lower raw material production, overheating of the furnace body, and rising smoke and dust rate has increased significantly, and the existing structure of the concentrate nozzle is no longer good. Fully meet the needs of full mixing and rapid reaction of gas materials in the furnace under the condition of high feeding amount

In addition, according to the retrieval, the Chinese patent No. 200880105946.7 discloses a concentrate nozzle. On the basis of the existing concentrate nozzle, guide vanes are arranged in the air chamber to provide a corresponding rotating wind flow field. The manufacturing process of the concentrated ore nozzle is complicated, and the strength of the swirling air flow field of the reaction gas has been reduced and weakened when the reaction gas passes through the bird's nest water jacket and reaches the flash furnace top after setting, which cannot meet the expected requirements. The concentrate nozzle still has uneven material mixing, The phenomenon of upward backflow of air flow and poor concentrate feeding, the effect is not good

Images