海南生石灰粉主要成分為氧化鈣，通常制法為將主要成分為碳酸鈣的天然巖石，在高溫下煅燒，即可分解生成二氧化碳以及氧化鈣（化學式：CaO，即生石灰，又稱云石）。凡是以碳酸鈣為主要成分的天然巖石，如石灰巖、白堊、白云質石灰巖等，都可用來生產石灰。在沿海地區有用貝殼作原料，經燒制成殼灰，作生石灰用。

生產(chan)工(gong)藝(yi)：　原(yuan)始的石灰生產(chan)工(gong)藝(yi)是(shi)將(jiang)石灰石與燃料（木材(cai)）分層鋪放(fang)，引火(huo)煅(duan)燒一周即得。現代則(ze)采用(yong)(yong)機(ji)械化(hua)、半機(ji)械化(hua)立(li)窯(yao)以及(ji)回轉窯(yao)、沸騰(teng)爐等(deng)(deng)設(she)備進行(xing)生產(chan)。煅(duan)燒時間也相(xiang)應地縮短，用(yong)(yong)回轉窯(yao)生產(chan)石灰僅需2～4小時，比用(yong)(yong)立(li)窯(yao)生產(chan)可提高生產(chan)效(xiao)(xiao)率5倍(bei)以上(shang)。近年來(lai)，又出(chu)現了(le)橫流式(shi)、雙斜(xie)坡式(shi)及(ji)燒油環行(xing)立(li)窯(yao)和(he)帶預(yu)熱器的短回轉窯(yao)等(deng)(deng)節能(neng)效(xiao)(xiao)果顯(xian)著(zhu)的工(gong)藝(yi)和(he)設(she)備，燃料也擴大為煤、焦(jiao)炭(tan)、重油或液化(hua)氣等(deng)(deng)。

生(sheng)(sheng)(sheng)石(shi)(shi)(shi)灰(hui)污水(shui)治理已成為關乎經濟社(she)會(hui)和(he)(he)(he)諧發展的一(yi)項重(zhong)大(da)問題(ti)。在控制工(gong)(gong)(gong)(gong)業污染(ran)物排(pai)放(fang)量(liang)的增長方面(mian)，國家采取嚴格措施，生(sheng)(sheng)(sheng)石(shi)(shi)(shi)灰(hui)對造紙、釀造、化工(gong)(gong)(gong)(gong)、印染(ran)行(xing)業，加大(da)治理和(he)(he)(he)改造力(li)(li)度，淘汰高耗(hao)水(shui)、重(zhong)污染(ran)的落后工(gong)(gong)(gong)(gong)藝(yi)(yi)和(he)(he)(he)設備。我國工(gong)(gong)(gong)(gong)業化和(he)(he)(he)城市化進程不斷(duan)推(tui)進，生(sheng)(sheng)(sheng)石(shi)(shi)(shi)灰(hui)工(gong)(gong)(gong)(gong)業廢(fei)水(shui)和(he)(he)(he)城市污水(shui)排(pai)放(fang)量(liang)逐年(nian)增加，因不達標排(pai)放(fang)給(gei)環境造成了巨大(da)壓(ya)力(li)(li)和(he)(he)(he)危(wei)害，生(sheng)(sheng)(sheng)石(shi)(shi)(shi)灰(hui)在鋼(gang)鐵、電力(li)(li)、化工(gong)(gong)(gong)(gong)、煤炭等重(zhong)點行(xing)業、推(tui)廣廢(fei)水(shui)循環利用，提高工(gong)(gong)(gong)(gong)業用水(shui)重(zhong)復利用率(lv)。同時，生(sheng)(sheng)(sheng)石(shi)(shi)(shi)灰(hui)工(gong)(gong)(gong)(gong)業廢(fei)水(shui)處理工(gong)(gong)(gong)(gong)藝(yi)(yi)、技術不斷(duan)提高，生(sheng)(sheng)(sheng)石(shi)(shi)(shi)灰(hui)給(gei)水(shui)處理絮凝劑也提出了新的要求。