Industrial method for leaching of primary uranium-molybdenum ores

Abstract

The invention belongs to the technical field of oxygen pressure acid leaching of primary uranium-molybdenum ores, and particularly relates to an industrial method for leaching of primary uranium-molybdenum ores. The industrial method aims to solve the problems that an existing uranium-molybdenum leaching process is poor in adaptability to mineral property change, low in molybdenum leaching rate, low in resource utilization rate, large in potential environmental risk and high in cost. The industrial method comprises the following steps that 1, uranium-molybdenum symbiotic raw ores are subjectedto ore grinding, grading and pulp mixing; 2, sulfuric acid with the concentration of 92.5%-98% is added into ore pulp for pre-soaking, and the ore pulp is preheated to 80-90 DEG C by utilizing recovered steam; 3, the preheated ore pulp is continuously fed into a horizontal type pressurization reaction kettle through an ore pulp pump, and continuously stirred at the first stage of the horizontal type pressurization reaction kettle, so that leached ore pulp is continuously obtained; 4, the obtained leached ore pulp is subjected to steam recovery through flash evaporation equipment for preheating the raw ore pulp, and the temperature of the ore pulp is reduced to 110 DEG C or below; and 5, the ore pulp further exchanges heat with washing cold water, through solid-liquid separation, slag is removed to a tailing warehouse, and filtrate enters the next process.

Description

technical field

[0001] The invention belongs to the technical field of oxygen pressure acid leaching of primary uranium and molybdenum ores, and in particular relates to an industrialized method for oxygen pressure acid leaching of primary uranium and molybdenum ores. Background technique

[0002] my country's molybdenum resources are very rich, but most of them belong to complex and polymetallic associated ores that are difficult to select. Using the conventional stirring leaching method, the leaching recovery rate is very low, and the waste of resources is serious. Uranium-molybdenum paragenetic ore has high economic value, but because some ores have poor ore-forming properties, low grade, and high degree of oxidation of molybdenum, it is difficult to enrich the useful metals by using traditional physical or chemical beneficiation techniques. Due to the complex existence of forms, in addition to molybdenum minerals such as molybdenum, iron molybdenum, molybdenum calcium o...

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