港口散货堆场铁矿粉起尘风洞试验研究  

Research on dust emission of iron ore for bulk-cargo yard of ore terminal by using wind tunnel test

作　　者：李绍武[1] 李文善[1] 雷鹏[1] 彭士涛[2] 

机构地区：[1]天津大学建筑工程学院港口工程系,天津300072 [2]交通运输部天津水运工程科学研究所水路交通环境保护技术交通行业重点实验室,天津300456

出　　处：《水道港口》2016年第5期558-562,共5页Journal of Waterway and Harbor

基　　金：<煤炭矿石码头粉尘控制设计规范>专题研究项目;中交第一航务工程勘察设计院有限公司的资助;交通运输部天津水运工程科学研究院;唐山曹妃甸矿石码头有限公司的大力支持和协助

摘　　要：通过风洞试验,确定了铁矿粉的起尘量与表层含水率、风速的关系。得到的结果是,在自然含水率下,铁矿粉起尘量与风速高次方成正比,巴西矿、澳洲矿和南非矿的幂指数分别为1.530、5.189和6.124;风速小于9 m/s时,起尘量很小。起尘量与物料表面含水率成负幂指数关系,幂指数在-1.673^-0.167 3之间。不同矿种的含水率拐点位置不同,澳洲矿含水率拐点约为5%~6%,巴西矿约为2.5%,南非矿拐点位置不明显。洒水固结后,12 m/s风速下各种矿的起尘量降低19~20倍以上,一些组次起尘量为0。Based on wind tunnel tests,the formulae of the iron ore dust emission versus wind velocity and sur-face moisture content were presented. The results are as follows：The dust emission of iron ore is proportional to thepower function of wind velocity at natural moisture,and the exponents are 1.530,5.189 and 6.124 for Brazilianore,Australian ore and South African ore,respectively. The dust emission is very low for the wind velocity beneath9.0 m/s. The dust emission is proportional to the negative power function of the surface moisture content,with theexponents varying from-1.673 to-0.1673. Different ore type has different inflexion location. The inflexion of theAustralian ore is located around 5%-6%,while is 2.5% for Brazilian ore and is ambiguous for the African ore. Aftersurface-hardening by watering on the ore stacks,the ore dust emissions will be decreased by 19 to 20 times and insome test cases it may approach zero even under wind velocity of 12 m/s.

关 键 词：铁矿粉 风洞试验 风速 表面含水率 起尘量 

分 类 号：X513[环境科学与工程—环境工程]