新型铀矿石品位在线监测仪器的研制
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摘要
研制了一种利用235 U的185.7keV的γ能量峰来测量铀矿石品位的在线监测仪器。该仪器不考虑射气系数,减小了钍、铀、钾的子体对测量结果的影响;以探测器内嵌黄饼的方式,利用动态捕捉235 U的185.7keV的γ能量峰技术,克服了温度对测量结果的影响,解决了在品位测量过程中温度和铀、钍、钾等子体放射性对测量结果的影响问题。研究了矿石质量变化、密度变化对矿石品位测量的影响,并且给出了补偿后的结果。经过一系列测试,仪器系统误差在10%以内,偶然误差为0.57%,测量重复性为0.97%,满足行业要求。
An on-line monitoring instrument for measuring the grade of uranium mine by using the gamma energy peak of 235 U 185.7 keV is introduced.It does not need to consider the air ejection coefficient and the influence of the progeny of thorium,uranium and potassium on the measurement results are reduced.The yellow cake is embedded in the detector which uses the dynamic capture of 235 U185.7 keV gamma energy peak techniques to overcome the influence of temperature on the measurement results.Therefore,the influence of temperature on the process of grade measurement is reduced,and the influence of the radioactivity of the progeny of uranium,thorium and potassium on the measurement results is also reduced.The influences of mine mass change and density change on mine grade measurement are discussed,and the results after compensation are given out.After a series of tests,the system error is less than 10%,the accidental error is 0.57%,and the repeatability is 0.97%.Those results are meet the requirements of the industry standards.
An on-line monitoring instrument for measuring the grade of uranium mine by using the gamma energy peak of 235 U 185.7 keV is introduced.It does not need to consider the air ejection coefficient and the influence of the progeny of thorium,uranium and potassium on the measurement results are reduced.The yellow cake is embedded in the detector which uses the dynamic capture of 235 U185.7 keV gamma energy peak techniques to overcome the influence of temperature on the measurement results.Therefore,the influence of temperature on the process of grade measurement is reduced,and the influence of the radioactivity of the progeny of uranium,thorium and potassium on the measurement results is also reduced.The influences of mine mass change and density change on mine grade measurement are discussed,and the results after compensation are given out.After a series of tests,the system error is less than 10%,the accidental error is 0.57%,and the repeatability is 0.97%.Those results are meet the requirements of the industry standards.
引文
[1]360百科.矿石品位在线检测仪[EB/OL].(2013-07-04)[2016-03-27].
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[2]罗学辉,王春生,陈占生,等.粉末压片-波长色散X射线荧光光谱法在钼矿石测定中的应用[J].黄金科学技术,2011,19(2):78-80.
[3]葛良全,赖万昌,周四春,等.原位快速测定矿石品位的X辐射取样技术[J].金属矿山,1997,248(2):12-16.
[4]赵奎,邓飞,金解放,等.基于灰色系统理论的矿石品位预测模型及应用[J].金属矿山,1997,341(11):43-45.
[5]葛艳梅.王水溶样-火焰原子吸收光谱法直接测定高品位金矿石的金量[J].岩矿测试,2014,33(4):491-496.
[6]ВСЛагов,张登福.工业用中子-吸收分选机的研制[J].湿法冶金,1989,32(3):24-31.
[7]汪淑慧.铀矿石放射性分选的技术与经济[J].铀矿冶,2009,28(3):126-129.
[8]中国核工业总公司.铀矿石矿车计量站γ快速分析:EJ371—89[S].北京:核工业标准化研究所,1989:17-29.
[9]汲长松.核辐射探测器及其实验技术手册[M].北京:原子能出版社,2010.
[10]马运超,闭义德,侯志永.放射性物探检查站影响因素分析[J].中国核科学技术进展报告(第三卷):铀矿地质分卷,2013:242-248.
[11]国防科学技术工业委员会.铀矿样品加工和管理技术规范:EJ/T1121—2000[S].北京:核工业标准化研究所,2000:1.