Palinso njira ziwiri zopangira zitsulo zosasowa padziko lapansi, zomwe ndi hydrometallurgy ndi pyrometallurgy. Hydrometallurgy ndi njira yamankhwala azitsulo, ndipo njira yonseyi imakhala yosungunulira komanso yosungunulira. Mwachitsanzo, kuwonongeka kwa zinthu zosawerengeka zapadziko lapansi, kupatukana ndi kutulutsa ...
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