1. Vertical Roller Mill Does Not Produce Powder Or Less The causes are as follows: 1) the discharge valve (powder locking device) is not closed tightly, and the outside air and dust are sucked back; 2) The air duct of the main engine is blocked; 3) Blade wear, resulting in too little or unable to shovel material; 4) There is serious air leakage at the joint of pipe and flange. Solutions: 1) repair or seal the discharge valve; 2) Remove the blockage; 3) Check the blade wear and replace it; 4) Carefully check and re seal the air leakage. 2. The oil tank and transmission are hot Causes: 1) the viscosity of engine oil is too thick; 2) The direction of the analyzer is not right. Solutions: 1) check whether the viscosity of engine oil meets the requirements; 2) Adjust the running direction of the analyzer.