I assume that you are looking for a rough tonnes per hour rule of thumb.
Here is an extract from the Quick determination of Flt plan charts.
(Hope I have got them right, it is late here)
Based on Landing weight of 150,000kg. Speed M.82, zero component.
2000 nm sector at FL 350, zero component 26,000kg fuel, 4.24 hours. Works out to 6100/hour.
5000nm sector , 69,500kg fuel, 10.36 hours works out to 6700/hour.
The biggest variation from these numbers will be if you up the mach number otherwise they are rough numbers.
Personaly I just carried copies of the quick determination charts to check flight plans as the total fuel can vary quite a bit on a long trip when all the parameters are accounted for.
Hope this helps.