The \"Regulatory Requirements for the Lead and Zinc Industry (2015)\」no longer mention a production capacity of 100,000 tons per year – is this a step backward?

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The last edit to this post was made by cy1125915 on 2015-8-11 at 08:25. After reading the \"Specifications for the Lead and Zinc Industry (2015)\", it was found that when stating the scale requirements, the phrase \"For new lead and zinc smelting projects, the smelting capacity of a single production line must be 50,000 tons per year or more (not including 50,000 tons)\\" was removed； The requirement that the scale of a single zinc smelting line must be 100,000 tons per year or more is changed to: For projects that handle zinc oxide ore or zinc-containing secondary resources separately, whether new or upgraded projects, the scale of the pyrometallurgical processing stage must be 15,000 tons of metallic zinc per year or more, while the scale of a single hydrometallurgical line must be 50,000 tons of metallic zinc per year or more ； For existing enterprises, the pyrometallurgical processing capacity must be 10,000 tons of metallic zinc per year or more, while the capacity of a single hydrometallurgical unit must be 30,000 tons of metallic zinc per year or more. "It turns out that the requirements for the process equipment are such that for new zinc smelting projects, the roasting of zinc sulfide concentrate must be carried out using a bubbling roasting process that features high sulfur utilization efficiency and ensures that the exhaust gases meet regulatory standards ； The bed area of a single boiling roasting furnace must be 109 square meters or more, and it must be equipped with acid production systems such as those with double rotation and double suction. "It should be changed to: “The roasting of zinc sulfide concentrate must employ a fluidized roasting process that features high sulfur utilization efficiency and meets emission standards; the bed area of each fluidized roasting furnace must be 100 square meters or more. A dual-turn dual-suction or other advanced acid production process must be installed, and desulfurization facilities are required for the acid production exhaust gases when necessary.” "It gives the impression that **there is no longer a requirement for the capacity to be over 100,000 tons; however, the boiling furnace requires a space of over 100 square meters, which means the capacity still has to be greater than 100,000 tons. It seems like this is a step backward, isn’t it?