A vibrating premixed concentrate nozzle

Abstract

The invention discloses a vibrating pre-mixing type concentrate nozzle. The vibrating pre-mixing type concentrate nozzle comprises an oxygen supply pipe and a hollow annular dispersing air pipe which are superposed in pipe core and sleeve along the vertical direction successively, and cone-shaped technological air bellows which form an air chamber, wherein a feeding box which is opened downward in the top sleeves the outer wall of the dispersing air pipe and a horizontal fixed plate is fixedly connected to the top of the hollow annular dispersing air pipe, and air hammer vibrating devices which shake off nodules by driving the dispersing air pipe to move back and forth up and down is fixedly connected to the top, far from the dispersing air pipe, of the fixed plate; a feed inlet pre-mixing air opening with an upward air opening is formed on the lower side of the opening of the feeding box; a technological air rotating device which enables gas to pre-mix concentrate powder along the tangential direction is arranged at the inlet of the technological air bellow; and an independent pre-mixing air supply pipeline which is introduced to the bottom of the feeding box and a pre-mixing air beam device are further arranged in the dispersing air pipe, and an inner cyclone tube leading to a discharge opening is further arranged on the outer side of the feeding box. The invention discloses the vibrating pre-mixing type concentrate nozzle which can effectively reduce the nodulating phenomenon and improve the burning effect of a copper concentrate mineral aggregate.

Description

Technical field [0001] The invention belongs to the technical field of copper smelting, and specifically relates to a vibration premixed concentrate nozzle. Background technique [0002] In the copper flash furnace smelting process, a concentrate nozzle and a process air box for blowing process air are set on the top of the smelting furnace, and the copper concentrate mineral material, oxygen and dispersed air are injected into the smelting furnace through the concentrate nozzle. At the bottom of the concentrate nozzle, the mineral material is mixed with the process air and burned to form slag and matte. The mineral material and the process air are fully mixed. This is the rapid and complete oxidation reaction of the mineral material in the limited space below the concentrate nozzle One of the important conditions. [0003] At present, most of the concentrate nozzles used by copper mining enterprises are central diffusion type concentrate nozzles designed and produced by Finnish O...

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Problems solved by technology

[0003] 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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