Improved vibrating premixed concentrate burner

Abstract

The divisional application discloses an improved vibrating premixed concentrate burner, comprising an oxygen supply tube, a hollow ring-shaped dispersing pipe, and a tapered process windbox forming achamber; wherein the oxygen supply tube, the dispersing pipe and the windbox are coincided in core and are vertically arranged in a sleeving mode, the outer wall of the dispersing pipe is sleeved witha feed box which is obliquely opening at the top thereof, and the top of the hollow ring-shaped dispersing pipe is fixedly secured to a horizontal fixing plate, and the end, far away from the dispersing pipe, of the fixing plate, is fixedly connected an air hammer vibrating device for vibrating a nodule by driving the dispersing pipe to move reciprocally up and down; a feed inlet premixed tuyerefacing upwardly is arranged in a lower side of the feed box; a process wind-swirling device enabling air to premix concentrate powder tangentially is arranged in an inlet of the process windbox; an independent premixed air pipe and an air-beam premixed device, leading to the bottom of the feed box, are also arranged in the dispersing pipe, and an inward rotating air pipe, leading to an outlet, isarranged on an outer side of the feed box. According to the invention, the vibrating premixed concentrate burner is capable of effectively reducing the nodules and improving the combustion effect of the copper concentrate.

Description

[0001] This application is a divisional application with application number 201610632799.5, application date of August 4, 2016, and invention name "a vibration premixing concentrate nozzle". technical field [0002] The invention belongs to the technical field of copper smelting, and in particular relates to an improved vibration premixing concentrate nozzle. Background technique [0003] In the copper flash furnace smelting process, a concentrate nozzle and a process wind box for blasting process air are installed on the top of the smelting furnace, and copper concentrate ore, oxygen and dispersing air are sprayed into the smelting furnace through the concentrate nozzle. At the bottom of the concentrate nozzle, the ore material is mixed with the process air and burned to form slag and matte. The ore material and the process air are fully mixed, which means that the ore material undergoes a rapid and complete oxidation reaction in the limited space below the concentrate nozzl...

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Problems solved by technology

[0004] At present, most of the concentrate nozzles used by copper mining enterprises are central diffuse concentrate nozzles designed and produced by Outokumpu Company of Finland, such as figure 1 As shown, the feature of the concentrate nozzle is that the mineral material and the process air are sprayed into the furnace in the same direction, and the purpose of mixing is mainly achieved through the mutual diffusion and penetration of the gas phase and the solid phase. When using this central diffusion type concentrate nozzle for low-level spraying That is to say, when the injection inlet of the mineral material is close to the outlet of the process air, the mixture of the mineral material and the process air is easier, but when the material is sprayed at a high position, that is to say, the injection inlet of the mineral material is higher, and there is still a certain gap with the outlet of the process air. When the height is different, the reaction time of the mineral material is relatively delayed at this time. In addition, when the input amount of the mineral material is small, the mineral material entering the furnace can be quickly heated to the reaction temperature by the high-temperature flue gas or radiant heat in the furnace, and the concentrated ore Vigorous combustion reaction begins to occur within about 1.5m of the nozzle outlet, and when the amount of mineral material input is large, it is difficult to ensure that the mineral material and process air can be fully mixed within the limited space of the feed inlet at the top of the reaction tower, and Bonding is easy to occur at the bottom of the concentrate nozzle; at the same time, due to the water-cooled bottom plate at the lower end of the nozzle, it plays a certain role in heat insulation and reduces nodules. Nodules, which greatly affect the mass transfer and heat transfer rate of the combustion reaction, not only cause the content of ferric oxide in the slag to increase, the smoke rate and SO 3 The generation rate increases, and the utilization efficiency also decreases significantly, which in turn affects the production capacity of smelted copper

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