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(sheng)產(chan)(chan)工(gong)藝：　原始的石灰(hui)生(sheng)產(chan)(chan)工(gong)藝是將石灰(hui)石與燃(ran)料(liao)（木材）分層鋪(pu)放，引火煅(duan)燒一周即得。現(xian)代則采(cai)用(yong)(yong)機械(xie)(xie)化、半機械(xie)(xie)化立(li)窯(yao)(yao)(yao)以及(ji)回(hui)轉(zhuan)窯(yao)(yao)(yao)、沸騰爐等設備(bei)進行(xing)(xing)生(sheng)產(chan)(chan)。煅(duan)燒時間也(ye)相(xiang)應地縮短，用(yong)(yong)回(hui)轉(zhuan)窯(yao)(yao)(yao)生(sheng)產(chan)(chan)石灰(hui)僅(jin)需(xu)2～4小時，比(bi)用(yong)(yong)立(li)窯(yao)(yao)(yao)生(sheng)產(chan)(chan)可(ke)提(ti)高生(sheng)產(chan)(chan)效率5倍以上。近年來，又出現(xian)了橫流式、雙(shuang)斜(xie)坡式及(ji)燒油環行(xing)(xing)立(li)窯(yao)(yao)(yao)和帶預熱器的短回(hui)轉(zhuan)窯(yao)(yao)(yao)等節(jie)能效果顯著的工(gong)藝和設備(bei)，燃(ran)料(liao)也(ye)擴大為煤、焦炭、重油或(huo)液化氣(qi)等。

生石灰(hui)污水(shui)(shui)治理已成為關乎經濟(ji)社會和(he)(he)諧發展(zhan)的一(yi)項(xiang)重(zhong)(zhong)大問題(ti)。在(zai)控制工(gong)(gong)業(ye)污染(ran)物排放量(liang)的增長方面，國(guo)家采取嚴(yan)格(ge)措施，生石灰(hui)對造(zao)紙、釀造(zao)、化工(gong)(gong)、印染(ran)行業(ye)，加大治理和(he)(he)改造(zao)力度，淘(tao)汰高耗水(shui)(shui)、重(zhong)(zhong)污染(ran)的落后工(gong)(gong)藝和(he)(he)設備。我國(guo)工(gong)(gong)業(ye)化和(he)(he)城市化進程不斷推進，生石灰(hui)工(gong)(gong)業(ye)廢水(shui)(shui)和(he)(he)城市污水(shui)(shui)排放量(liang)逐年增加，因不達標排放給(gei)(gei)環(huan)境(jing)造(zao)成了巨大壓力和(he)(he)危害，生石灰(hui)在(zai)鋼鐵、電(dian)力、化工(gong)(gong)、煤炭等重(zhong)(zhong)點行業(ye)、推廣廢水(shui)(shui)循環(huan)利用(yong)(yong)(yong)，提高工(gong)(gong)業(ye)用(yong)(yong)(yong)水(shui)(shui)重(zhong)(zhong)復利用(yong)(yong)(yong)率。同時(shi)，生石灰(hui)工(gong)(gong)業(ye)廢水(shui)(shui)處理工(gong)(gong)藝、技術(shu)不斷提高，生石灰(hui)給(gei)(gei)水(shui)(shui)處理絮凝劑(ji)也提出了新的要求(qiu)。