Research on the water-rock interaction of the ash water and the basal Middle-Ordovician limestone under the red-mud yard in Zhongzhou Aluminum

Taking the red-mud storage yard of Zhongzhou aluminum in Jiaozuo as the research object, the water-rock interaction during the transportation of the pollutants, total hardness, chloride ion, sulfate ion, fluorine ion etc. that adhered in the red-mud towards the ground water is stimulated by means of indoor leaching test. The results prove that the ground water is polluted through the rock-water interaction of transportation, accumulation, dissolution and adsorption as well as ion exchange during the infiltration of the liquid that adhered to the red-mud and the ash water. The dynamics of the dissolution of soluble salts is characterized as that the dissolving rate is large at the beginning of the test and then decreases gradually, until tends to zero. The water-rock interaction during the infiltration of ash water is predominated by dissolution in the early period of the test and then by ion exchange.