The most critical change is the introduction of inspections of three chemical elements - thallium, fluorine and chlorine - as well as a lower maximum content of chemicals already under restrictions.
The first draft of the consultation document has been seen by a small number of market participants from July, around the same time that customs went
proposed to the copper industry further lowering the impurities threshold of copper concentrates.
Under the current standard for zinc, in place since 2006, imported concentrates may contain a maximum of 0.6% arsenic, 0.3% cadmium and 0.06% mercury, according to the Ministry of...
