Umthengisi weCalcium Hydroxide (Hydrated Lime) eMzantsi Afrika

Yintoni iCalcium Hydroxide?

I-calcium hydroxide (Ca(OH)₂, i-hydrated lime, i-slaked lime) sisiseko esingabonakaliyo esiveliswa yi-hydrating quicklime (calcium oxide, CaO) ngamanzi. Ifumaneka njengomgubo omhlophe ocolekileyo kwaye ayinyibiliki kakuhle emanzini (i-lime saturation: ~1.7 g/L kwi-20°C) kodwa ivelisa isisombululo esinamandla se-alkaline (pH ~12.4). I-calcium hydroxide yeyona khemikhali ye-alkaline esetyenziswa kakhulu kwaye ingabizi kakhulu ekunyangweni kwamanzi - isetyenziselwa ukunyusa i-pH, ukukhawulezisa iintsimbi ezinzima kunye ne-phosphate, ukuthambisa amanzi, ukuzinzisa udaka, ukuthomalalisa amanzi amdaka e-acid, kunye nokunyanga i-acid mine drainage (AMD).

Unyango lwamanzi kunye nohlengahlengiso lwe-pH

Kwinkqubo yokucoca amanzi kamasipala, ukuthambisa ilime kusebenzisa i-calcium hydroxide ukunyusa i-pH ukuya kwi-~10–11, okwandisa i-calcium carbonate (evela kwi-CO₂ enyibilikisiweyo kunye ne-bicarbonate reaction) kunye ne-magnesium hydroxide, okunciphisa ubulukhuni bamanzi. Kwinkqubo yokucoca amanzi amdaka, ilime isetyenziselwa ukulungisa i-Langelier Saturation Index, ilinganise amanzi ukuze angaboli okanye angakhi kwisikali kwinkqubo yokusasazwa. Kwinkqubo yokucoca amanzi amdaka, ilime yeyona reagent ikhethwayo yokunciphisa amanzi amdaka ane-acid kwi-plating, semiconductor, chemical manufacturing, kunye nemisebenzi yemigodi ngenxa yexabiso layo eliphantsi kunye nokusebenza kwayo kuluhlu olubanzi lwe-acid neutralization.

Unyango lwe-Acid yeMigodi yamanzi

Unyango lwe-acid mine drainage (AMD) lolona setyenziso likhulu kwi-hydrated lime eMzantsi Afrika. I-AMD evela kwi-sulphide ore mines kunye ne-tailings idla ngokuba ne-acid eninzi (pH 2–4) kwaye igcwele i-iron enyibilikisiweyo, i-manganese, i-aluminium, i-zinc, i-copper, kunye nezinye ii-heavy metals. Umlinganiselo we-lime unyusa i-pH ukuya kwi-9–11, nto leyo eyenza ezi zi-metal zibe yi-hydroxides kunye ne-carbonates ezihlala kumachibi ahlala okanye kwi-clarifiers kwaye zisuswe njenge-sludge. I-Terracore Chemicals inikezela nge-hydrated lime kwiingxowa ezingama-25 kg, iingxowa ze-1 MT, kunye nokuhanjiswa kwe-bulk tanker yonyango lwamanzi, amanzi amdaka, kunye nemisebenzi yemigodi kulo lonke elaseMzantsi Afrika.