硫铁矿废水制备铁黑颜料的工艺  

Preparation of black iron pigment from iron pyrite wastewater

作　　者：李雁[1] 徐明仙[2] 林春绵[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032 [2]杭州职业技术学院,浙江杭州310018

出　　处：《化工进展》2010年第1期168-172,共5页Chemical Industry and Engineering Progress

摘　　要：采用湿法氧化沉淀法,通过调节反应溶液初始pH值(7～12)、反应温度(70～95℃)、反应时间(1～4.5h)和搅拌速度(50～250r/min),探索了硫铁矿废水制备铁黑颜料的工艺条件。结果表明:在pH值为9.5、反应温度为85℃、反应时间为2.5h、搅拌速度为150r/min的条件下,能制备得到较优的铁黑颜料。其经XRD、SEM及铁黑颜料技术指标检测分析,表明该铁黑颜料粒径在60nm左右,Fe3O4含量在95%以上,各项指标均能达到氧化铁黑颜料行业标准中一级品的要求。The wastewater in iron pyrite exploitation contains lots of iron （with low acidity） and has a potential harm to environment. The treatment and utilization of iron pyrite wastewater is meaningful for environment protection. Thus, the preparation of black iron pigment from iron pyrite wastewater were explored with a wet oxidation precipitation method through regulating the pH of the original reaction solution （7- 12）, reaction temperature （70-95 ℃）, reaction time （1-4.5h） and the stirring rate （50- 250 r/min）. Black iron pigment with high quality was obtained at the conditions ofpH 9.5, temperature 85℃, reaction time 2.5h and stirring rate 150 r/min. XRD and SEM analysis showed that the particle size of the prepared black iron pigment is about 60nm, and Fe304 content is higher than 95%. The product can reach the requirements for the first-grade standard in black iron pigment industry.

关 键 词：硫铁矿 酸性矿坑废水 铁黑颜料 制备 

分 类 号：X751[环境科学与工程—环境工程]