STUDY ON URANIUM OCCURRENCE STATE AND PROCESS MINERALOGY OF URANIUM MINERALS IN NALINGGOU URANIUM DEPOSIT,ORDOS BASIN
Understanding the occurrence state of uranium is crucial for determining the leaching rate dur-ing ground leaching.The process mineralogy characteristics of uranium minerals provide insights into the interaction between uranium minerals and leaching agents,adding significant value to the study of ore de-posits.This research employs scanning electron microscopy(SEM)and the TESCAN integrated mineral analysis(TIMA)to investigate the occurrence state and process mineralogy characteristics of uranium minerals in the Nalinggou Uranium deposit.The key findings are as follows:(1)Composition of uranium:The uranium in the Nalinggou uranium deposit primarily consists of independent uranium minerals,mainly uranite.A small quantity of uranium-containing minerals,such as zircon and monazite,is also present.Adsorbed uranium is primarily found on the surface of organic matter.(2)Particle size distribution:The particle size of uranium minerals ranges from 0 to 160 μm,with 90.07％falling within this range.The majority of uranium minerals have a particle size less than 50 μm,accounting for 60.92％.A smaller per-centage(9.93％)of uranium minerals have a particle size greater than 200 μm.(3)Association with other minerals:Uranium minerals exhibit close associations with various minerals,including organic matter,chlorite,quartz,biotite,and orthoclase.The proportions of association with these minerals are 21.46％,16.48％,13.76％,11.56％,and 10.45％,respectively.This indicates that the majority of uranium min-erals are closely associated with other minerals,with isolated uranium minerals being relatively rare.This study successfully identifies the spatial distribution relationship of uranium minerals in the Nalinggou ura-nium deposit.Uranium minerals are mainly located within and on the surface of organic matter,as well as distributed in the interlayer cracks between chlorite and biotite.The hydrophobic nature of organic matter and the resistant layered structure of chlorite and biotite contribute to a reduction in the leaching rate of u-ranium during the actual leaching process.While most uranium minerals are leachable,the challenge lies in ensuring their effective contact with the leaching solution to optimize uranium leaching rates.
万方数据
维普
