本文關鍵詞： 紊流酸洗 破鱗 延伸率 數(shù)學模型　出處：《華東理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：鹽酸紊流酸洗技術具有酸洗效率高,質量好,節(jié)約成本的優(yōu)點,因此目前國內外各大鋼廠大多采用紊流酸洗技術對帶鋼進行酸洗處理。鹽酸紊流酸洗的影響因素主要有鹽酸溫度、鹽酸濃度、破鱗度、亞鐵離子的濃度、紊流度等,其中紊流度的大小主要靠調節(jié)噴射到帶鋼的流量來控制,破鱗度主要靠調節(jié)拉矯破鱗裝置的壓下量和張緊力來調節(jié)。本文利用自主設計的拉矯破鱗試驗機對帶鋼進行拉矯破鱗,從宏觀和微觀角度來觀察破鱗前后帶鋼表面形貌和氧化皮結構的變化。運用自行設計制造的紊流酸洗試驗裝置對不同工藝參數(shù)進行酸洗試驗,研究各參數(shù)與酸洗時間的關系,建立包括溫度、濃度、破鱗度、紊流度四種因子的綜合影響數(shù)學模型,并運用數(shù)學模型分析酸洗線的控制策略。研究結果表明：拉矯破鱗參數(shù)對酸洗時間的影響因子中壓下量為主要影響因子；流量越大酸洗時間越短,流量達到一定值時對酸洗效率的提高不明顯,流量與帶鋼速度成線性關系；帶鋼厚度和卷取溫度對氧化皮結構和酸洗時間有一定的影響,薄的帶鋼厚度和低的卷取溫度可形成較易酸洗的氧化皮結構；綜合考慮各因子與酸洗時間的關系,建立綜合影響數(shù)學模型,經(jīng)驗證其相關系數(shù)高于0.953,具有一定的參考價值,為酸洗線上酸洗時間的預測提供指導；提出一種運用數(shù)學模型分析的紊流酸洗控制策略。
[Abstract]:The hydrochloric acid turbulent pickling technology has the advantages of high pickling efficiency, good quality and cost saving. At present, most of the major steel mills at home and abroad use the turbulent pickling technology to pickle the strip steel. The main factors affecting the hydrochloric acid turbulent pickling are hydrochloric acid temperature, concentration of hydrochloric acid, scale breaking degree, and the concentration of ferrous ion. The turbulence degree is mainly controlled by adjusting the flow rate of jet to the strip steel. The scale breaking degree is mainly adjusted by adjusting the reduction and tension of the tension and straightening device. This paper makes use of the self-designed tensile straightening test machine to straighten the strip. The surface morphology and the structure of the oxidized strip before and after scale breaking were observed from the macroscopic and microscopic angles. Different technological parameters were tested by using the turbulent pickling test device designed by ourselves. The relationship between each parameter and pickling time was studied, and a mathematical model of comprehensive influence of four factors, temperature, concentration, scale breaking degree and turbulence degree, was established. The mathematical model is used to analyze the control strategy of pickling line. The results show that the influence of the parameters of scale breaking on the pickling time is the main factor. The larger the flow rate is, the shorter the pickling time is, the less the pickling efficiency is when the flow rate reaches a certain value, and the linear relationship between the flow rate and the strip speed. The thickness of strip and the coiling temperature have certain influence on the structure and pickling time of the oxidized sheet. The thin strip thickness and the low coiling temperature can form the structure of the oxidized sheet which is easy to pickle. Considering the relationship between each factor and pickling time, the mathematical model of comprehensive influence is established. The correlation coefficient is higher than 0.953, which has certain reference value and provides guidance for predicting pickling time on pickling line. A turbulent pickling control strategy based on mathematical model analysis is proposed.
【學位授予單位】：華東理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TG335.5

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本文編號：1490480