Energy saving and environmental protection active lime roasting shaft kiln

Abstract

The invention relates to the technical field of metallurgy construction material production devices, in particular to an energy-saving environment-friendly active lime roasting shaft kiln. A center burner protection air bellow, a center burner protection air beam, a discharge device designed into a push plate structure, an improved kiln-top seal and distributor device and a kiln top waste heat recovery device are additionally arranged by a large air-cooling central composite burner. High central airflow of the furnace body is realized, temperature distribution is uniform and controllable, and guarantee is provided for producing high-quality steelmaking active lime, construction active magnesia or fireproof materials. The energy-saving environment-friendly active lime roasting shaft kiln is simple and reliable in devices, low in investment and maintenance cost, easy to upsizing, high in production efficiency, wide in application range, high in heat energy utilization efficiency, low in energy consumption and product cost, and good in production environment.

Description

technical field [0001] The invention relates to the technical field of metallurgical building material production equipment, in particular to an energy-saving and environment-friendly active lime kiln, which is suitable for producing building material active magnesite or refractory materials. Background technique [0002] At present, my country's lime production process is based on co-fired coal lime kiln and 180M 3 Gas-fired kilns are mainly used, with backward technology, outdated equipment, high energy consumption, poor quality and serious pollution, and urgently need to be replaced. [0003] At present, in domestic steelmaking, active lime is used instead of ordinary lime, which not only saves lime consumption by 20-40%, but also shortens steelmaking time, increases production, improves molten steel quality and furnace lining life, and greatly reduces steelmaking costs. Due to the strict temperature control requirements in the roasting process, the investment in product...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is exactly in order to overcome the deficiency of existing lime kiln, a kind of energy-saving and environment-friendly active lime roasting vertical kiln is provided, and is suitable for producing building material active magnesia or refractory material, to solve following three problems: 1, the whole vertical kiln Uneven air distribution and temperature distribution; 2. Short service life of the bottom plate of the kiln top heat exchange air box, low combustion air temperature and low thermal efficiency

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