Natural gas cupola furnace

Abstract

A natural gas cupola furnace comprises a furnace body and a forehearth. The furnace body is divided into a feeding section, a preheating section, an overheating section and a gas combustion section, an infrared level gauge is arranged at the top of the feeding section of the furnace body, a gas outlet is formed in the top of the furnace body, a feed inlet is formed in the side wall of the feeding section of the furnace body, a furnace gas detector is arranged on the gas outlet, ceramic ball layers are installed in the overheating section of the furnace body, a water-cooling furnace bar is arranged between the overheating section and the gas combustion section, a natural gas combustion jet nozzle is fixedly connected with the periphery of the gas combustion section in a welded mode, and a recarburizer nozzle is arranged in the middle of the gas combustion section. According to the natural gas cupola furnace, monitoring can be conducted on various production parameters in the natural gas cupola furnace, the temperature and the composition of molten iron are adjusted rapidly, automatic moulding line tact is matched, the production line efficiency is improved, the energy consumption is reduced, and the melting cost of tons of castings is low.

Description

technical field [0001] The invention relates to the field of cast iron, in particular to a natural gas cupola used for melting cast iron. Background technique [0002] The cupola is an important equipment for melting cast iron in foundry production. The cast iron block is melted into molten iron and poured into the sand mold After cooling down, open the box to obtain castings. The cupola is used as the melting equipment in the production of castings. It has a large melting capacity and can continuously supply molten iron, which is especially suitable for the production rhythm of the automatic high-speed molding line. But because the traditional cupola uses coke as fuel, there are dust and exhaust emissions. Due to environmental pressure, the country's requirements for energy conservation and emission reduction are increasingly strict and strictly enforced, making foundries use multiple electric furnaces instead of cupolas. While adapting to environmental protection, foundr...

AI Technical Summary

Problems solved by technology

But because the traditional cupola uses coke as fuel, there are dust and exhaust emissions

Due to environmental pressure, the country's requirements for energy saving and emission reduction are increasingly strict and strictly enforced, making foundries use multiple electric furnaces instead of cupolas. While adapting to environmental protection, foundry factories are large energy consumers, and the melting cost per ton of castings is high.

[0003] And in the process of melting molten iron in a cupola furnace, parameters such as the height of the feed level, air volume and pressure, furnace gas temperature and composition in the furnace will affect the efficiency of melting molten iron and the quality of molten iron

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