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Using the adaptive redundant lifting wavelet to the vibration signal de-noising has better de-noising effect, but the traditional threshold function of the method has the problems of discontinuous wavelet coefficients or constant deviation. In order to meet the high precision demand of the active balancing of the motorized spindle and improve the extraction accuracy of the unbalance signal, the improved bivariate threshold function was introduced into the method, and then a new de-noising method on unbalance vibration signal of the motorized spindle based on improving adaptive redundant lifting wavelet was put forward. The new method was applied to the engineering unbalance vibration signal. The result showed that the new method can retain the original signal feature of amplitude and phase, as well as eliminate noise more effectively, when the actual vibration signal of motorized spindle is low SNR and non-stationary.

Using the adaptive redundant lifting wavelet to the vibration signal de-noising has better de-noising effect, but the traditional threshold function of the method has the problems of discontinuous wavelet coefficients or constant deviation. In order to meet the high precision demand of the active balancing of the motorized spindle and improve the extraction accuracy of the unbalance signal, the improved bivariate threshold function was introduced into the method, and then a new de-noising method on unbalance vibration signal of the motorized spindle based on improving adaptive redundant lifting wavelet was put forward. The new method was applied to the engineering unbalance vibration signal. The result showed that the new method can retain the original signal feature of amplitude and phase, as well as eliminate noise more effectively, when the actual vibration signal of motorized spindle is low SNR and non-stationary.

The productivity of specularite, a type of haematite with more than 66% Fe, and of vanadium-titanomagnetite, with 53.69% Fe, 3.09% Si O2 and 12.69% TiO2, can be greatly increased by partial replacement of coke breeze with biomass of a higher rate of combustion, as they are hard to granulate but in larger sizes reduce the permeability of the sintering bed and hence the speed of sintering. Experiments showed that when 40% of coke is replaced with carbonised biomass the sintering speed and specific production capacity of an ore mix containing 35% specularite were improved from 19.06 mm/min and 1.33 t/m2/h to 21.45 mm/min and 1.47 t/m2/h, while those of an ore mix containing 55% V-titanomagnetite increased from 17.23 mm/min and 1.11 t/m2/h to 22.80 mm/min and 1.44 t/m2/h., The productivity of specularite, a type of haematite with more than 66% Fe, and of vanadium-titanomagnetite, with 53.69% Fe, 3.09% Si O2 and 12.69% TiO2, can be greatly increased by partial replacement of coke breeze with biomass of a higher rate of combustion, as they are hard to granulate but in larger sizes reduce the permeability of the sintering bed and hence the speed of sintering. Experiments showed that when 40% of coke is replaced with carbonised biomass the sintering speed and specific production capacity of an ore mix containing 35% specularite were improved from 19.06 mm/min and 1.33 t/m2/h to 21.45 mm/min and 1.47 t/m2/h, while those of an ore mix containing 55% V-titanomagnetite increased from 17.23 mm/min and 1.11 t/m2/h to 22.80 mm/min and 1.44 t/m2/h.