The invention belongs to the technical field of agricultural and sideline
product processing, and particularly discloses an expanded full-fat soybean
processing technology improving the
protein solubility. Soybeans after dedusting and
impurity removal are sent into a
crusher and crushed, the crushed material is sent into a wet expanding
machine and subjected to thermal refining preheating and
extrusion expanding, and finally the expanded full-fat soybeans are acquired through cooling, wherein the pore size of a sieving slice of the
crusher during crushing is 1.5-1.8 mm, and technological parameters of the wet expanding
machine comprise that the feeding speed of 38-42 r / min, the steam addition amount of 13-15%, the
steam pressure of 0.45-0.47 MPa, the thermal refining temperature of 75-85 DEG C, and the expanding temperature of 105-115 DEG C. Under the condition of the technological parameters, the expanded full-fat
soybean product significantly increases the
protein solubility while keeping lower
urease activity; under the technological parameters, the obtained expanded full-fat soybeans have the
moisture content decreased significantly, so as to be more beneficial for preserving; and under the technological parameters, the obtained expanded full-fat soybeans have crude fat and crude
protein contents increased significantly, and the nutritional value is improved.