Regarding the issue of tar viscosity
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Is the tar viscosity often above the standard? Is it mainly caused by an excessively high furnace temperature (temperature in the furnace top space)?
Roof space temperature: priority is given to the coal cake height, and secondly to the pressure at the viewing ports
The viscosity of the tar often exceeds the specified limits; it is likely that the temperature in the space above the furnace is too high. It is necessary to check whether the heating regime is appropriate, whether the standard temperatures are too high, whether insufficient coal has been loaded into the carbonization chamber, and whether the pressure at the viewing ports is too high, among other things
If the toluene-insoluble content is high, the tar viscosity is also high.
The factors that affect tar viscosity mainly include coal blending, coking time, coking temperature, and the space above the carbonization chamber. It is also related to factors such as tar moisture.
There is also the coal loading capacity; the space above the furnace cannot be too large.