A device for preheating raw materials for sintering by using steam and sludge

Abstract

A device for preheating to-be-sintered raw materials with steam and sludge belongs to the technical field of sintered ore. The device comprises a primary concentration basin, a secondary concentration basin, a filter screen, a steam pipeline, a lifting platform, a sludge pump, a mud stirring paddle and a through hole, wherein the primary concentration basin and the secondary concentration basin communicate with each other through the bottom through hole; the filter screen is located at the upper part of the primary concentration basin; the steam pipeline is located at the four corners of the secondary concentration basin; the lifting platform is located above the secondary concentration basin; and the sludge pump and the mud stirring paddle are mounted in the middle of the lifting platform. The device has the advantages of simple structure, low site requirement and easiness in implementation. The sludge concentration of equipment with no steam pipeline is about 20%-25% in general, and the concentration is increased to 35%-38% after the steam pipeline is arranged on the equipment.

Description

technical field [0001] The invention belongs to the technical field of sintering ore, in particular to a device for preheating sintering raw materials by using steam and sludge. Background technique [0002] As a national basic industry, the iron and steel industry has a large production scale, a long process, and various types of energy consumption, and the energy consumption is high. According to the statistics of some enterprises, steam energy consumption accounts for about 10% of the total energy consumption of metallurgical enterprises. Research and sintering production show that for every 10°C increase in the temperature of the sintering mixture, the consumption of sintering solid fuel will be reduced by more than 2kg, and the utilization factor of the sintering machine will increase by 3% to 6%. The comprehensive utilization of self-produced steam and other by-products is of great significance for iron and steel enterprises to save energy, reduce emissions and reduce...

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Problems solved by technology

[0006] Due to the high altitude in some areas in northern my country, the temperature in winter is low (lowest to minus 20°C), and the temperature of the sintering mixture is low, resulting in an increase in the sintering overhumidity layer, which affects the sintering production

Although it is feasible to increase the temperature of the mixture by relying on quicklime digestion and heat release, the dust removal effect in the nitrification process of quicklime is poor and the temperature increase is limited, which can not reach the expected goal, which makes the iron and steel enterprises in some northern regions lack the ability to increase the mixing temperature in winter production. Material temperature effective means

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