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在高炉运转中,准确地测量其含水量一直是个重要的课题。但由于焦炭呈粒度不均的块状,要在生产过程中测定它的水份,目前,除使用中子水份计外,尚无更好的方法。但是,在以往的检测方法上,对类似焦炭这种水份分布不均、体密度也不断变化的被测对象,因在测量原理上受到一定的限制,其测量精确度的提高就很困难。为此,国外研制了基于快中子和γ线同时穿透的新方式的水份计,使得同位素检测更加实用化起来了。 1.旧形水份计的原理和存在的问题旧形水份计按其检测方式有插入型和表面型两种。其测量原理是基于由氢原子而引起的中子的减速
In the operation of the blast furnace, accurate measurement of its water content has always been an important issue. However, due to the uneven size of coke block, to determine its moisture in the production process, at present, in addition to the use of neutron moisture meter, there is no better way. However, in the past detection methods, it is very difficult to improve the measurement accuracy due to the measurement principle being limited to the measured object such as coke, which has uneven water distribution and a constant body density. For this reason, a moisture meter based on a new way of simultaneous penetration of fast neutron and γ-ray has been developed abroad, making isotope detection more practical. 1. The principle of the old water meter and the existing problems Old water meter according to its testing methods have two kinds of insert type and surface type. The measurement principle is based on the deceleration of neutrons caused by hydrogen atoms