摘要
对某地区钙质胶磷矿进行了矿物组成和元素分析,并选用反浮选脱镁工艺进行了硫酸、磷酸和混酸的抑制剂对比试验,结果表明使用混酸作为抑制剂最佳。本文研究了钙质胶磷矿在混酸作抑制剂条件下的反浮选机理,并对胶磷矿、白云石进行了溶液化学计算。研究表明,混酸电解反应生成的H^+能与HCO_3^-、CO_3^(2-)发生化学反应,降低白云石矿物表面阴离子的浓度,并且生成的CO2能阻碍矿物表面氢键的形成,从而活化了白云石的浮选;混酸电离反应生成的HPO_4^(2-)、H_2PO4^-和PO_4^(3-)易于吸附到磷矿物表面,与油酸根离子的吸附形成竞争吸附,抑制胶磷矿矿物的浮选。
Through analysis of the mineral and chemical ele- ments and compositions in a siliceous cellophane, a reverse flota- tion and magnesium removing process was chosen to process the ore and contrast tests of sulfuric acid, phosphoric acid and mixed acids were conducted separately. The results showed that it is best to use mixed acids as inhibitor. Reverse flotation mechanism was researched with mixed acids for siliceous cellophane and solution chemical calculation was made of eollophanite and dolomite. The study indicated that H＋ generated in electrolytic reaction of mixed acids could react with HCO3-, CO3 2- , reducing the con- centration of anion on the dolomite mineral surface and COz gen- erated could hinder formation of hydrogen bonds on the mineral surface, thereby activating flotation of dolomite . HPO42- , H2PO4- and PO43- generated in electrolytic reaction of mixed acids are apt to be adsorbed onto the phosphate rock surfaces, de- veloping competitive adsorption with the oleic acid ion adsorption and suppressing the cellophane mineral flotation.
作者
李丰
田鹏杰
LI Feng TIAN Peng-jie(China Bluestar Lehigh Engineering Corp, Lianyungang Jiangsu 222004, Chin)
出处
《化工矿物与加工》
CAS
北大核心
2016年第10期8-10,共3页
Industrial Minerals & Processing
关键词
胶磷矿
反浮选
混酸
溶液化学
collophanite
reverse flotation
mixed acids
solutionchemistry
