热轧油泥在线气浮除油中试研究
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摘要
介绍了气浮工艺的除油原理,利用5 m~3/h中试装置进行了在线热轧油泥除油试验,包括气浮试验、气浮加药试验和二次气浮试验。试验结果表明:在吸气量为1.5 L/min时,回流比15%、气液比12.5%、气体压力0.5 MPa的条件下,气浮除油效果最好;加药和二次气浮可以进一步提高除油率;在线气浮可以实现热轧油泥除油后含油率≤5%的回用标准。大生产应用可行性分析表明:中试试验参数可应用于生产实际且效果更好,投资回收期约为1.5年。
The oil removing principle on the air flotation process was introduced. The online oil removing experiments for oil sludge resulted in hot rolling by gas flotation were carried out with the 5 m3/h pilot-scale test equipment, including the gas flotation test, medicament feeding test by gas flotation and testing by secondary gas flotation. The experimental results showed that when the inspiratory capacity was 1.5 L/min, the best result of oil removing by gas flotation was obtained while the reflux ratio was 15%, the gas-liquid ratio was 12.5% and the gas pressure was 0.5 MPa.While the oil removal rate could be improved further by the medicament feeding by gas flotation and secondary gas flotation. By using online air flotation process for oil removing, the oil content whose recycling standard value was equal to or less than 5% could be achieved after the oil sludge resulted in hot rolling sludge was deoiled. The feasibility of the gas flotation process applied in the large-scale industrial production based on analysis showed that the parameters obtained by pilotscale tests could be used in production practice and could get better results. The period for recovery of investment on the oil removing was about one and half years.
The oil removing principle on the air flotation process was introduced. The online oil removing experiments for oil sludge resulted in hot rolling by gas flotation were carried out with the 5 m3/h pilot-scale test equipment, including the gas flotation test, medicament feeding test by gas flotation and testing by secondary gas flotation. The experimental results showed that when the inspiratory capacity was 1.5 L/min, the best result of oil removing by gas flotation was obtained while the reflux ratio was 15%, the gas-liquid ratio was 12.5% and the gas pressure was 0.5 MPa.While the oil removal rate could be improved further by the medicament feeding by gas flotation and secondary gas flotation. By using online air flotation process for oil removing, the oil content whose recycling standard value was equal to or less than 5% could be achieved after the oil sludge resulted in hot rolling sludge was deoiled. The feasibility of the gas flotation process applied in the large-scale industrial production based on analysis showed that the parameters obtained by pilotscale tests could be used in production practice and could get better results. The period for recovery of investment on the oil removing was about one and half years.
引文
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[2]DR SCHUL WOLFGANG,H Markus,DR KLINGELHOEFERPAUL.Deoiling of metal sludges,esp mill scale-by extraction with water contg nonionic surfactant:Deutsches,DE4238280[P].1994-05-19.
[3]姚明.热轧油泥的漂洗回收利用[J].柳钢科技,2009(1):62.
[4]程秀芳,高瑞香.轧钢铁鳞去油剂的研制[J].腐蚀科学与防护技术,2006,18(3):231-232.
[5]杨大正,齐殿威,杨立军,等.热轧油泥清洗试验研究[C]//第十届中国钢铁年会暨第六届宝钢学术年会.上海:中国金属学会,2016:915-922.
[6]程秀芳.轧钢铁鳞烧结前的预处理新技术[D].天津:天津大学,2005.
[7]王志家,吕安,刘德林.铁鳞球团矿的生产[J].鞍钢技术,1992(9):7-10.
[8]廖洪强,赵胜利,杜德敏,等.利用低温蒸馏工艺处理轧钢污泥技术研究[C]//全国能源与热工年会.昆明:中国金属学会能源与热工分会,2004:315-318,323.
[9]廖洪强,何亚斌,余广炜,等.轧钢含油铁鳞的处理方法及设备系统:中国,CN03149964.3[P].2003-08-01.
[10]任宗兴,刘洪松.轧钢氧化铁皮含油对烧结过程的影响[J].首钢科技,1996(4):48-51.
[11]吴玉祥,陈勇,王宇.气浮技术在热轧含油污水改造工程中的应用[J].世界钢铁,2011(3):18-21.