Zinc oxide rotary volatilization kiln high-temperature reaction zone temperature field monitoring method based on thermodynamic mechanism

Abstract

The invention discloses a zinc oxide rotary volatilization kiln temperature field monitoring method based on a thermodynamic mechanism, and the method comprises the steps: dividing a kiln body into different regions in the axial direction, and enabling one of the different regions to be a high-temperature reaction region; determining a heat transfer mode among materials in the kiln, flue gas and the kiln wall; calculating the total consumption amount of coke as a reducing agent according to various chemical reactions occurring in different areas in the kiln, and establishing chemical reaction heat release models in different areas; dividing a kiln body into slice units for analysis, and establishing an energy conservation equation of materials, flue gas and kiln walls; substituting the heat transfer coefficient and the chemical reaction heat release model into an energy conservation equation; and calculating a temperature field model by considering a numerical solution method of chemical reactions in different regions to obtain temperature distribution of the high-temperature reaction region. The temperature field model can be established according to the chemical mechanism, the obtained temperature information provides operation guidance for kiln workers, and energy conservation and consumption reduction in the production process are achieved.

Description

technical field [0001] The invention relates to the field of industrial process modeling and monitoring, in particular to a method for monitoring the temperature field of a high-temperature reaction zone of a zinc oxide rotary volatilization kiln based on a thermodynamic mechanism. Background technique [0002] The zinc smelting industry is the basic raw material industry supporting the development of my country's national economy and national defense industry. More than 85% of the world's zinc production comes from hydrometallurgy—minerals are roasted, leached, purified, and electrolyzed to produce zinc ingots. However, the remaining neutral leaching slag after the mineral leaching stage still contains 20%-30% zinc. The industrial zinc recovery method is to mix the zinc leaching slag with a certain proportion of coke, and through a series of complicated chemical reactions and volatilization processes under high temperature conditions, the zinc-containing oxides in the mixt...

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for monitoring the temperature field in the high-temperature reaction zone of a zinc oxide rotary volatilization kiln based on a thermodynamic mechanism, aiming at solving the inaccurate monitoring of the temperature monitoring method in the high-temperature reaction zone of the existing volatilization kiln The problem

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