Large-proportion simultaneous coal gangue and coal slime blending combustion method of large circulating fluidized bed boiler

The invention discloses a large-proportion simultaneous coal gangue and coal slime blending combustion method of a large circulating fluidized bed boiler. Coal gangue is large in hardness, poor in breaking property and is not prone to burning out. The large-proportion simultaneous coal gangue and coal slime blending combustion method of the large circulating fluidized bed boiler comprises the steps of firstly, independent breaking of coal gangue; secondly, strict control over the furnace inlet coal granularity; thirdly, adjustment of the primary wind amount and the secondary wind amount of all load segments; fourthly, adjustment of the bed temperature; fifthly, adjustment of the bed pressure; sixthly, controlling the excess combustion excess air number to be qualified; seventhly, determining of the soot blowing frequency according to the coal ash content; eighthly, control over the bed temperature during load changing; ninthly, reinforcing of monitoring for the wall temperature of the heating face; tenthly, r