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KR desulfurization slag (KR slag) is a kind of solid waste which produced in steel industry, while hot metal desulfurized by KR (Kambara Reactor) mechanical stirring (KR desulfurization process). As the iron and steel enterprises have been expanding, and KR desulfurization process has been extending, the discharge of KR slag is increasing. For the lack of effective treatment, KR slag piles occupied a certain amount of land resources, but also caused pollution to the environment. So the study of its physicochemical properties and explore effective ways of using KR residue can eliminate its negative effects on the environment, at the same time reduce costs for enterprises. For the high levels of alkaline ingredients in KR slag, it can be applied to treat the acidic wastewater which is generated by the iron and steel enterprises. In this way, KR slag will be effective used, and raw materials to acidic wastewater will be saved. What’s more, the cost of business will be further reduced, due to the resources in the enterprise achieve recycling. In this paper, KR slag’s Physicochemical properties, such as particle size distribution, density distribution, magnetic distribution, chemical composition, mineral composition, heavy metals and surrounding topography, were studied by particle size sieving, heavy liquid separation, magnetic separation, XRD, ICP-AES and SEM etc. According to the KR slag containing high levels of alkaline components, KR slag is was used to titrated acid, and treat acid mine drainage and simulated acidic wastewater respectively to explore its ability of treating acidic wastewater, Four conclusions were drawn from this study:（1）The span of particle size is comparatively large in KR slag, but most of slag congregates smaller than 0.15mm on particle size. The grains in KR slag occur as block and clastic particles, with irregular particle shapes.（2）The 40~ 50% of KR slag is consist with CaO, 5~ 10% is f-CaO, 6~ 12% is TFe, 1~ 9% is FeO, 9~ 11% is SiO2, besides a certain amount of C, Al2O3, MgO and a litter of S, P, F. （3）Calcite, hydroxyl calcium stone, lime, calcium and iron oxide, calcium silicate and carbon are the KR slag mineral phases. In the different particle size segments, density segments and magnetic segments, the contents of chemical composition and mineral phase are variational. （4）In theory, The dosing quantity of KR slag used to treat acid mine drainage are 0.192g/L for A, 0.094g/L for B, 0.129g/L for C. In the other hand, the pH of wasterwater increase to six within two hours, when the dosing quantity of KR slag are only 0.115g/L for A, 0.075g/L for B and 0.78g/L for C for treating simulated acidic wastewater. But it need to increase dosage to treat acid mine drainage effectively in fact, because some components in KR slag can react with Ca(OH)2 and appear precipitation. On the whole, through the study of KR slag’s characteristics and its neutralizing acid, the acid mine drainage and simulated acidic wastewater, we have found that KR slag treatment of acidic wastewater, especially before treatment is an effective KR slag utilization |
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8楼2012-04-06 21:40:26
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hp2005334035: 金币+70, 翻译EPI+1, ★★★很有帮助, 谢谢了啊 2012-04-06 22:59:53
hp2005334035: 金币+70, 翻译EPI+1, ★★★很有帮助, 谢谢了啊 2012-04-06 22:59:53
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刚才对你的文章进行了部分修改，感觉原文翻译得实在有点值得商榷。所以，真的不是很好改，就像对一个长相确实不敢恭维的人整容很难一样。建议你下次还是请个人翻译一下。我尽最大的努力了，仅供参考。 KR desulfurization slag (KR slag) is a kind of solid waste in steel industry, a waste of hot metal desulfurized by KR (Kambara Reactor) mechanical stirring (KR desulfurization process). As iron and steel enterprises have been expanding and KR desulfurization process has been extending, the discharge of KR slag is increasing. For the lack of effective treatment, KR slag piles not only occupied a certain amount of land resources, but also caused pollution to the environment. Therefore, the study of its physicochemical properties and explore effective ways of using KR residue can eliminate its negative effects on the environment while reduce costs for enterprises. As for the high levels of alkaline ingredients in KR slag, it can be applied to treat the acidic wastewater which is generated by the iron and steel enterprises. In this way, KR slag will be effectively used, and raw materials to acidic wastewater will be saved. What’s more, the cost of business will be further reduced thanks to the resources in the enterprise achieve recycling. In this paper, KR slag’s Physicochemical properties such as particle size distribution, density distribution, magnetic distribution, chemical composition, mineral composition, heavy metals and surrounding topography, were studied by particle size sieving, heavy liquid separation, magnetic separation, XRD, ICP-AES and SEM etc. According to the KR slag containing high levels of alkaline components, it is used to treat acid, acid mine drainage and simulated acidic wastewater respectively to explore its ability of treating acidic wastewater. Four conclusions were drawn from this study:（1）The span of particle size is comparatively large in KR slag, but most of slag congregates are smaller than 0.15mm on particle size. The grains in KR slag occur as block and clastic particles with irregular particle shapes.（2）40~ 50% of KR slag is composed of CaO, in detail 5~ 10% is f-CaO, 6~ 12% is TFe, 1~ 9% is FeO, 9~ 11% is SiO2, with a certain amount of C, Al2O3, MgO and a litter of(不知道你用“a litter of”想表达什么意思,否则可能需要更改) S, P, F. （3）Calcite, hydroxyl calcium stone, lime, calcium and iron oxide, calcium silicate and carbon are KR slag mineral phases. In different particle size segments, density segments and magnetic segments, the contents of chemical composition and mineral phases are varable. （4）In theory, The dosing quantity of KR slag used to treat acid mine drainage are 0.192g/L for A, 0.094g/L for B, 0.129g/L for C. What’s more, the pH of wastewater will increase to six within two hours when dosing quantity of KR slag is only 0.115g/L for A, 0.075g/L for B and 0.78g/L for C in treating simulated acidic wastewater. However, it need to increase dosage to treat acid mine drainage effectively in fact, because some components in KR slag can react with Ca(OH)2 and appear precipitation. To sum up, through the study of KR slag’s characteristics, neutralizing acid, the acid mine drainage and simulated acidic wastewater, we have found that KR slag treating acidic wastewater is an effective KR slag utilization. |
2楼2012-04-06 15:31:25
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3楼2012-04-06 16:06:05
4楼2012-04-06 20:23:34