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The invention discloses an eight-membered cyclic alpha, beta-unsaturated ketone solalyratin B as well as a preparation method and application thereof, and belongs to the technical field of natural product chemistry and plant active ingredient extraction, and the structural formula of the eight-membered cyclic alpha, beta-unsaturated ketone solalyratin B is shown in the specification. The invention also relates to an application of the eight-membered cyclic alpha, beta-unsaturated ketone solyratin B in preparation of an antioxidant or antibacterial active preparation. The invention provides an efficient eight-membered ring alpha, beta-unsaturated ketone solyratin B separation method, the separation efficiency and the product purity are improved, meanwhile, the operation process is simplified, and the accuracy of structural identification is ensured.

This utility model discloses a slag resource recovery system. The key technical features include a pretreatment device, a crushing device, a magnetic separation device, a jig separation device, a shaking table separation device, and an eddy current separation device. The pretreatment device is used to screen the slag. The crushing device is connected to the pretreatment device and is used to crush large pieces of material. The magnetic separation device is connected to the crushing device and is used to screen iron impurities in the slag. The jig separation device is connected to the magnetic separation device and is used to separate slag particles smaller than 15mm after pretreatment, crushing, and iron removal. The shaking table separation device is connected to the jig separation device and is used to separate the bottom material. The eddy current separation device is connected to the jig separation device and is used to separate the jig overflow. This slag resource recovery system can effectively separate slag and recover metals from it to the maximum extent.