Energy-saving environmentally-friendly converter slag splashing protecting charging and production process thereof

Abstract

The invention provides an energy-saving environmentally-friendly converter slag splashing protecting charging and a production process thereof. The converter slag splashing protecting charging comprises the following raw materials by weight: 30-50 parts of light-burnt magnesium powder, 20-30 parts of waste magnesia carbon brick, 15-30 parts of limestone, 0-5 parts of coke and 1-5 parts of active lime dust removal powder; the light-burnt magnesium powder comprises 85% of MgO or more, 1.5% of SiO2 or less, 2.0% of CaO or less and 11% of igloss; and 90% or more of the light-burnt magnesium powder with the particle size of 120mesh can be sieved; the waste magnesia carbon brick comprises 70% of MgO or more and 12% of C or more and has the particle size of 5mm or low; the limestone comprises limestone 53.5% of CaO or more, 1.5% of SiO2 or less and 0.025% of S or less and has the particle size of 16mm or lower; the coke comprises 80% of fixed carbon or more, 0.4% of S or less, less than 10% of volatile components and less than 10% of ash and has the calorific value of 6,000kcal or higher and the particle size of 10-25mm with upper and lower limits being not more than 5%; and the active lime dust removal powder comprises 80% of CaO or more and has the particle size of 1mm or lower. The converter slag splashing protecting charging is prepared by grinding the raw materials to be less than 180mesh by a stirrer and a ball grinder, granulating and drying.

Description

technical field [0001] The invention relates to an energy-saving and environment-friendly converter slag splashing protection charge and a production process thereof, belonging to the technical field of converter slag splashing protection, in particular to improving the furnace age of the converter and protecting the refractory lining of the converter. Background technique [0002] The function of the slag splashing to protect the furnace material is to modify the final slag of the converter, change the chemical composition, mineral phase, slag viscosity, melting point, etc. Add splashing slag to protect the furnace charge to increase the content of magnesium oxide in the slag and increase the high melting point phase in the slag; reduce the content of ferrous oxide in the slag to make the viscosity of the slag suitable, and it is easy to spray the slag on the furnace lining. The slag on the furnace can be well combined with the furnace lining and has a certain resistance to...

AI Technical Summary

Problems solved by technology

The disadvantage of method one is that the content of magnesium and calcium in the slag is high, the main mineral phase does not change, the melting point of the slag does not increase, and the furnace protection effect is poor

The disadvantage of the second method is that the slag splashing is too single, which basically can only increase the magnesium content in the slag, and the viscosity of the slag is not easy to control, which is not conducive to the slag splashing operation

The disadvantage of method 3 is that the production cost is high, and more light-burned magnesium powder raw material resources are consumed, and the product needs to be dried in a drying kiln at 100-200°C, which consumes a lot of energy.

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