Abstract: A pneumatic conveying and material blending system which includes a bin having an open vertical column mounted therein with a bottom of a column being spaced from the bottom of the bin. The material inlet is located in the bottom of the bin and a pneumatic conveying system supplies material to be blended from a source to the material inlet and conveys the material upwardly through the column so that the material is discharged from the top of the column in the manner of a geyser whereby it is spread over the top surface of material already in the bin. Material already in the bin flows down through the bin by gravity and is entrained by the upwardly flowing gas stream and conveyed up the column so that material already in the bin is blended with material being supplied to the bin.