Another large-scale and cheap industrial method is to directly heat with quicklime at high temperature, which can produce calcium oxide and a large amount of carbon dioxide gas. In addition, a new method is introduced: the method and equipment for producing carbon dioxide gas by electrothermal magnesite.
Patent number: 87 105749
Inventor: Fifth Design and Research Institute of National Machinery Industry Committee
The invention relates to a method and equipment for producing carbon dioxide gas by electrothermal decomposition in a specially designed sealed electric furnace with natural magnesite and dolomite as raw materials. After cooling, compressing and drying, the generated gas can obtain a high purity of more than 99.6%, without any purification measures, and can be directly used in industries such as welding, casting, soda and sparkling wine production, defluorination and purification of tap water, greenhouse crop cultivation, storage and preservation of fruits and vegetables, grains and fish. Compared with the existing method of producing CO-2 gas with kerosene, coke, acid, alkali and other energy materials and chemical products as raw materials, it saves energy, reduces cost, does not pollute the environment, and its by-products can be comprehensively utilized, which has high economic value.
In addition, there are some professional methods and equipment for producing carbon dioxide, such as NBC wire drawing double-gun CO2 arc welding machine, which can be used for reference.