M'mbuyomu, mchenga ndi miyala yonse yomwe imagwiritsidwa ntchito pomanga nyumba idakumbidwa kuchokera ku chilengedwe. Tsopano, chifukwa cha kuwonongeka kwa migodi kosalamulirika kwa chilengedwe, pambuyo pokonzanso lamulo la chilengedwe cha chilengedwe, migodi ya mchenga ndi miyala imakhala yochepa, ndipo kugwiritsa ntchito mchenga ndi miyala yobwezerezedwanso kwakhala nkhani yodetsa nkhawa kwambiri. Pakati pawo, ndi mphamvu yotani yogwiritsira ntchito mzere wopangira njerwa zazikulu pamchenga ndi miyala?

Monga tonse tikudziwira, ndi kuchepa kochepa kwa mchenga ndi miyala, mabizinesi ambiri amatembenukira kuzinthu zobwezeretsanso zinyalala. Pophwanya zinyalala zolimba monga zinyalala zomanga, zotsalira za mafakitale, zotsalira za tailings, ndi zina zambiri, zimatha kupanga mchenga ndi miyala yabwino yobwezerezedwanso m'malo mwa mchenga wachilengedwe ndi miyala. Pakadali pano, mchenga wobwezerezedwanso wasanduka mchere waukulu kwambiri komanso zida zomangira zachilengedwe, ndipo China yakhalanso msika waukulu kwambiri padziko lonse lapansi wogwiritsa ntchito mchenga wowumbidwanso. Kugwiritsiridwa ntchito kwa mchenga wa zinyalala zolimba pachaka ndi pafupifupi matani 20 biliyoni, kuŵerengera pafupifupi theka la chiwonkhetso cha padziko lonse. Ndipo makina amtundu wa njerwa ndi mzere waukulu wopanga njerwa zopangidwa ndi njerwa, zida zake zopangira zimakhala ndi gawo lalikulu.

Kuchuluka kwa zinyalala zolimba mu njerwa zomangidwa ndi njerwa ndi pafupifupi 20%, ndipo kugwiritsa ntchito zinyalala zolimba sizokwera, koma ndizabwino kuposa zambiri. Kupyolera mu luso lamakono ndi malingaliro, chiwerengero cha mchenga ndi miyala ya zinyalala zolimba pamzere wopangira makina akuluakulu a njerwa ndizoposa kawiri kuposa njerwa wamba wopangidwa ndi njerwa, zomwe ndi zopambana mu luso lopanga njerwa ndi luso lotsogola.

Kumanga chitukuko cha chilengedwe ndi chitukuko cha nthawi yaitali komanso chogwirizana cha dziko lathu. Choncho, sitingathe kugwiritsa ntchito zinthu zomwe tinabadwa nazo mwachimbulimbuli, zomwenso ndizomwe zimayambitsa kubadwa kwa mchenga wongowonjezwdwa. Ndi zolowa m'malo, kuchuluka kwa ogwiritsa ntchito kudzawongoleredwa mwachilengedwe. Kupyolera mu kafukufuku wozama pa aggregates osiyana olimba zinyalala ndi kusanthula njira maselo, Honcha ofufuza sayansi bwinobwino kugonjetsa mavuto luso makampani patapita zaka zingapo, analenga mkulu-anzanu kugwedera ndi luso extrusion, ndi configured izo mu lalikulu njerwa makina kupanga zida mzere, ndi kupanga njerwa.