Leaching test device for coal gangue

The utility model discloses a leaching test device for coal gangue. The leaching test device comprises a leaching column, analog rainfall equipment, a leaching liquid collection device, and a water supply device, wherein the leaching column is used for performing leaching tests on the coal gangue; the analog rainfall equipment is arranged above the leaching column; the leaching liquid collection device is used for collecting leaching liquid discharged from the leaching column; the water supply device is used for continuously supplying water to the analog rainfall equipment, and comprises a water supply tank and a water pipe; a flow detection unit and a flow control unit are mounted on the water pipe; the leaching column comprises a bottom water draining section, a middle sample accommodating section and an upper rainfall section from the bottom to the top; a coal gangue sample is mounted in the middle sample accommodating section; the analog rainfall equipment comprises a plurality of analog rainfall pipes which are all mounted on the water outlet of the water pipe and inserted into the upper rainfall section; spray nozzles are mounted at the bottoms of the analog rainfall pipes; inching switches are mounted on the analog rainfall pipes. The leaching test device is simple in structure, reasonable in design, simple and convenient to use and operate, high in using effect, stable and reliable in test process, simple to control during the test, and visual in display effect, thereby capable of truly simulating the leaching process of the coal gangue under the action of rainfall.