Hi, there. Not sure what you need...
If you need a way to use an alias then: /kb1#channel <nick> <forhowmanyminutes> <bantype> <reason>
If you need a way to use an alias with %bantype, then:
change this ban -u [ $+ [ $calc($3 * 60) ] ] $1 $2 $4
into this: ban -u [ $+ [ $calc($3 * 60) ] ] $1 $2 %bantype
or use this /kb1 #channel <nick> <forhowmanyminutes> %bantype <reason>
Hope that helped!