Energy-saving type active-lime terminal roasting kiln

Abstract

The invention relates to an energy-saving type active-lime terminal roasting kiln. The energy-saving type active-lime terminal roasting kiln comprises a roasting kiln, a bin, a furnace-kiln feeding system, a flue-gas discharging pipe connected with a residual-head recovery device, a cooling and a bearing device. The energy-saving type active-lime terminal roasting kiln is characterized in that thecross section of the roasting kiln body is a ring-shaped belt which is uniformly partitioned into sector-shaped kiln cavities by using refractory materials; a pushing device and a secondary burning chamber are correspondingly arranged at the lower part of a roasting belt of each sector-shaped kiln cavity; the secondary burning chamber is arranged at the lower part of the pushing device; a main burning chamber is arranged at the lowermost part of the roasting kiln cavity; the upper end of the main burning chamber is communicated with the lower part of each sector-shaped kiln cavity, and the lower end of the main burning chamber is communicated with a feeding hopper of the cooling device; a main gas burner and a secondary gas burner are respectively arranged on the side walls of the main burning chamber and the secondary burning chamber. The energy-saving type active-lime terminal roasting kiln has the advantages that the distributing and discharging uniformity is good; the whole gas-flow distribution and temperature distribution in the kiln body are uniform, and the cooling is uniform, so that overburning and caking can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of roasting kilns for roasting limestone or dolomite, and in particular relates to an energy-saving active lime terminal roasting kiln. Background technique [0002] Active lime is an auxiliary raw material for steelmaking and other industries. The kilns used to produce active lime mainly include rotary kilns and shaft kilns. Among the shaft kilns, there are mechanized shaft kiln, Maerz kiln (double chamber kiln), double beam kiln and so on. These shaft kilns have a common feature, that is, the burner is in direct contact with the material to be roasted, and the fire burns in the material. When these kilns use natural gas as fuel, due to the high calorific value of natural gas, there are the following problems: [0003] (1) The burner of the mechanized shaft kiln is located on the kiln wall, just at the edge of the kiln wall. The air is abundant, that is, the wind is strong. The fire from the burner is ful...

AI Technical Summary

Problems solved by technology

To solve the problem of poor uniformity of material distribution and discharge; uneven air distribution and temperature distribution in the kiln body, uneven cooling; kiln wall is easy to form rings, which affects the normal production of the kiln

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