黄金尾矿用于生产烧结墙体砖试验研究
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摘要
黄金尾矿的大量排放占用土地,还引发严重的环境和地质灾害等问题。将其用于烧结墙体砖生产,在大量处理尾矿的同时还能产生巨大的经济效益,是一种经济且环保的利用方法。排山楼矿业黄金尾矿中利于形成烧结强度的矿物含量达60%以上,-0.075mm的细颗粒含量占85%,适和用于烧结墙体砖生产。按黄金尾矿∶红陶土∶黄土配比为5∶4∶1,另外添加5%铁尾矿的混合材料制坯性能较好,将混合材料含水率控制为20%,混合后陈化24h,经手工练泥后在2 MPa成型压力下制坯,自然阴干5d后可满足烧结工艺要求。砖坯经缓慢升温后在1 020℃烧结2h,缓慢冷却后可生产颜色和外观质量好、达到MU15强度等级的优等品烧结普通砖。
The massive discharge of gold tailings occupies lands and also causes serious environmental and geological hazards.The research applied gold tailings to produce sintered wall bricks,which can also bring enormous economic benefits while dealing with tailings,and is an economic and environmental protection method.In the gold tailings of Paishanlou Mining,the mineral content achieved sintering strength is more than 60%,and the fine particle content of-0.075 mm accounts for 85%,which is suitable for the production of sintered wall bricks.The mixture ratio of gold tailings,red pottery clay and loess was 5∶4∶1,and the addition of 5%iron tailings had better properties,the moisture content of the mixed materialwas controlled to 20%,and the mixturewas aged for 24 h.After practicing mud by hand,the blankwas formed under the molding pressure of 2 MPa,and conducting the natural sintering after 5 days can meet the sintering process requirements.After slowly heating up,the bricks were sintered at a sintering temperature of 1 020℃ for 2 h,then slow cooled,which can obtain fine bricks of superior grade with good color and appearance quality and reaching the strength level of MU15.
The massive discharge of gold tailings occupies lands and also causes serious environmental and geological hazards.The research applied gold tailings to produce sintered wall bricks,which can also bring enormous economic benefits while dealing with tailings,and is an economic and environmental protection method.In the gold tailings of Paishanlou Mining,the mineral content achieved sintering strength is more than 60%,and the fine particle content of-0.075 mm accounts for 85%,which is suitable for the production of sintered wall bricks.The mixture ratio of gold tailings,red pottery clay and loess was 5∶4∶1,and the addition of 5%iron tailings had better properties,the moisture content of the mixed materialwas controlled to 20%,and the mixturewas aged for 24 h.After practicing mud by hand,the blankwas formed under the molding pressure of 2 MPa,and conducting the natural sintering after 5 days can meet the sintering process requirements.After slowly heating up,the bricks were sintered at a sintering temperature of 1 020℃ for 2 h,then slow cooled,which can obtain fine bricks of superior grade with good color and appearance quality and reaching the strength level of MU15.
引文
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[2]陈平.中国黄金尾矿综合开发利用的现状和发展趋势[J].黄金,2012,33(10):47-51.
[3]赵英良,邢军,孙晓刚,等.黄金尾矿资源化利用研究现状与进展[J].有色金属(矿山部分),2016,68(3):1-4,8.
[4]胡月,丁凤,刘韬,等.黄金矿山尾矿综合利用技术研究与应用新进展[J].黄金,2013,34(8):75-77.
[5]孙韵,谢娟,杨育娟,等.某尾矿堆积区土壤重金属分析与评价[J].黄金,2014,35(1):68-70.
[6]徐惠忠.利用黄金尾矿制砖的实验研究及生产工艺选择[J].硅酸盐建筑制品,1995(4):32-38.
[7]桑义敏,田巍,张倩,等.含氰黄金尾矿水泥窑资源化共处置的可行性[J].环境工程技术学报,2013,3(3):247-252.
[8]陈永亮,张一敏,陈铁军,等.温度制度对尾矿烧结砖性能及结构的影响[J].硅酸盐通报,2010,29(6):1343-1347.
[9]贺深阳,彭建军,万军,等.利用贵州卡琳型金矿尾矿制备烧结砖的研究[J].墙材革新与建筑节能,2013(7):33-36.
[10]杨永刚,朱申红,李秋义.高掺量金尾矿烧结砖的试验研究[J].新型建筑材料,2010,37(11):22-24.
[11]中华人民共和国水利部.土工试验方法标准:GB/T50123-1999[S].北京:中国计划出版社,1999:50-53.
[12]周天津.浅谈用黏土做粘结剂的粉煤灰烧结砖技术要点[J].砖瓦,2015(2):38-39.
[13]中华人民共和国国家质量监督检验检疫总局.烧结普通砖:GB5101-2003[S].北京:中国标准出版社,2003.
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