Nickel ore sintering machine

Abstract

The invention discloses a nickel ore sintering machine comprising a plurality of vertical kilns and a smoke pipe for concentrated discharge of tail gas, wherein a dust removal cylinder is arranged between each vertical kiln and the smoke pipe; each vertical kiln comprises a kiln body composed of an upper section kiln body, a middle section kiln body and a lower section kiln body; a feed port and a tail gas discharge port are formed in the top part of the upper section kiln body; a center tower gate is arranged at a discharge port of the lower section kiln body; the lower section kiln body relative to the center tower gate is set as an arc-shaped kiln body which is formed by expanding the middle part outwards and can guide side wind in a furnace to converge to the center of the furnace; a side air inlet is formed in the middle section kiln body; and a plurality of air inlets are formed in the wall of the smoke pipe, and different air inlets are formed in different cross sections of the smoke pipe. By forming the plurality of the air inlets, the nickel ore sintering machine disclosed by the invention improves the tail gas discharge amount of a unit time and improves the discharging efficiency; and by virtue of the arc-shaped kiln body, the wind is delivered to center tower gate and the center of an internal furnace combustion zone, and thus the nickel ore sintering efficiency is improved.

Description

technical field [0001] The invention relates to a nickel ore processing equipment, in particular to a nickel ore sintering machine. Background technique [0002] At present, the shaft kiln used in my country's cement industry is in the form of a single-tower grate ring discharge, and the kiln body of the shaft kiln is straight. "Excess, so that the coal in the ball is burned unevenly, resulting in a large loss of heat energy, low clinker quality, reduced output, and reduced labor production efficiency, and the tower grate of the large-diameter shaft kiln is bulky, making it difficult to manufacture and install , the normal firing and unloading of the clinker in the kiln cannot be guaranteed, the fixed jaw plate wears quickly, the replacement cycle is short, the discharge particle size is large, and the discharge temperature is high, which further increases the heat loss; secondly, in the nickel ore production process The exhaust gas produced passes through the two exhaust pipe...

AI Technical Summary

Problems solved by technology

[0002] At present, the shaft kiln used in China's cement industry is in the form of a single-tower grate ring discharge, and the kiln body of the shaft kiln is straight. "Excess, so that the coal in the ball is burned unevenly, resulting in a large loss of heat energy, low clinker quality, reduced output, and reduced labor production efficiency, and the tower grate of the large-diameter shaft kiln is bulky, making it difficult to manufacture and install , the normal firing and unloading of the clinker in the kiln cannot be guaranteed, the fixed jaw plate wears quickly, the replacement cycle is short, the discharge particle size is large, and the discharge temperature is high, which further increases the heat loss; secondly, in the nickel ore production process The exhaust gas produced passes through the two exhaust pipes on the top of the kiln body, and then is discharged directly through a vertical chimney. In order to reduce the pollution of the exhaust gas, the height of the chimney is generally set at 50-100 meters. High, which puts forward higher requirements on the power of exhaust emission, which makes the exhaust emission efficiency low, the emission is not clean, and it is easy to cause part of the exhaust gas to flow back to the production environment, pollute the production environment, and endanger the health of workers

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