甘肃张掖煤系高岭土湿法改性试验研究  

Experimental Study on Wet Modification of Zhangye Coal Series Kaolin in Gansu Province

作　　者：赵雪淞[1] 史帅 王冬旭 郑忠宇 宋王芳 刘文斌 Zhao Xuesong;Shi Shuai;Wang Dongxu;Zheng Zhongyu;Song Wangfang;Liu Wenbin(College of Mining,Liaoning Technical University,Fuxin,Liaoning 123000;Angang Group Mining Design and Research Institute,Anshan,Liaoning 114000;Shenyang Institute of Coal Group Co.,Ltd.,Shenyang,Liaoning 113000;Shandong Institute of Coal Geology Planning and Investigation,Ji’nan,Shandong 250104;Angang Group Mining Company Dagushan Pelletizing Plant,Anshan,Liaoning 114046)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]鞍钢集团矿业设计研究院,辽宁鞍山114000 [3]煤科集团沈阳研究院有限公司,辽宁沈阳113000 [4]山东省煤田地质规划勘察研究院,山东济南250104 [5]鞍钢集团矿业公司大孤山球团厂,辽宁鞍山114046

出　　处：《非金属矿》2020年第6期60-63,共4页Non-Metallic Mines

基　　金：国家自然科学基金(31870339)。

摘　　要：利用3-巯丙基三乙氧基硅烷偶联剂为改性剂,对甘肃张掖某煤系高岭土进行湿法改性制备吸附材料,以模拟废水中Cr(VI)去除率为衡量指标,采用单因素和正交试验研究改性剂投加量、改性温度、改性时间等因素对改性后煤系高岭土吸附性能的影响。结果表明,在3-巯丙基三乙氧基硅烷偶联剂的投加量为3倍煤系高岭土阳离子交换量(CEC)、改性温度为60℃、改性时间为10 h的条件下制得改性煤系高岭土,模拟废水中Cr(VI)质量浓度为10 mg/L,改性煤系高岭土用量为0.025 g/mL,改性后煤系高岭土对Cr(VI)的去除率从30.21%提升至72.84%,提高42.63百分点,经过改性的煤系高岭土吸附能力明显提升。In this paper,3-mercaptopropyl triethoxy silane coupling agent was used to modify a coal series kaolin from Zhangye,Gansu to prepare adsorption materials.The adsorption of Cr(VI)in simulated waste water was used as a measurement index.Single factor and orthogonal experiments were used to study the influence of modifier dosage,modification temperature,modification time and other factors on the adsorption performance of modified coal kaolin.The test results show that the modified coal series kaolin was prepared under the conditions of 3-mercaptopropyl triethoxy silane coupling agent dosage of 3 times CEC,modification temperature of 60℃,modification time of 10 h,the amount of modified kaolin in the simulated waste water is 0.025 g/mL,after modification,the removal rate of Cr(VI)in simulated waste water by coal series kaolin increased from 30.21%to 72.84%,the adsorption capacity of the modified coal series kaolin was significantly improved.

关 键 词：煤系高岭土 湿法改性 CR(VI) 去除率 

分 类 号：TD926.1[矿业工程—选矿]