...but I think you're right. Your gas/air mixture is too rich, and the incomplete combustion shows up as the orange-tipped flames. Is the stove set up for the gas you've got? I think if the stove is jetted for, say, natural gas, but your gas is propane, things won't be quite right. There is also an adjustment on most industrial-sized ranges to control the amount of air admitted to the combustion process. You might try tweaking that.