漏(lou)鋼(gang)是現(xian)代高效連(lian)鑄技術發展(zhan)的瓶頸性因素,黏結(jie)是其主要形式。目(mu)前(qian),已(yi)開發出一系列基于(yu)邏輯判(pan)斷(duan)或人(ren)工(gong)智能的漏(lou)鋼(gang)預(yu)(yu)報(bao)方法,基于(yu)溫度檢測(ce)的漏(lou)鋼(gang)預(yu)(yu)報(bao)系統已(yi)普遍應用于(yu)連(lian)鑄結(jie)晶(jing)器過程監控(kong)。然而,從(cong)國(guo)內外生產實踐看,高拉速引發的黏結(jie)漏(lou)鋼(gang)依然十(shi)分突出,漏(lou)報(bao)時有發生;針對大斷(duan)面板坯(pi),誤報(bao)則(ze)是目(mu)前(qian)漏(lou)鋼(gang)預(yu)(yu)報(bao)系統的常見問題,頻繁誤報(bao)和急降拉速將導致(zhi)鑄坯(pi)判(pan)廢、設備沖擊、輥(gun)縫擠壓與繁瑣維護。
科研工作者基于現場實(shi)測熱電偶(ou)溫(wen)度(du)(du)數據!將結晶(jing)(jing)器(qi)(qi)銅(tong)(tong)(tong)板溫(wen)度(du)(du)及其(qi)變化(hua)(hua)速率(lv)(lv)進行2維可視化(hua)(hua)。綜(zong)合考慮(lv)黏(nian)結形成和發展過程(cheng)中(zhong)(zhong)結晶(jing)(jing)器(qi)(qi)銅(tong)(tong)(tong)板溫(wen)度(du)(du)隨時間(jian)的變化(hua)(hua)和空間(jian)傳播行為(wei),借助計算(suan)機圖像處理中(zhong)(zhong)的8連通區域標記和邊界跟蹤算(suan)法,提取了異常區域的結晶(jing)(jing)器(qi)(qi)銅(tong)(tong)(tong)板溫(wen)度(du)(du)、位置、時間(jian)等(deng)信息,計算(suan)了結晶(jing)(jing)器(qi)(qi)銅(tong)(tong)(tong)板溫(wen)度(du)(du)變化(hua)(hua)速率(lv)(lv)的均值、最大(da)值、區域的面積(ji)、寬度(du)(du)、高(gao)度(du)(du)及其(qi)縱向(xiang)和橫向(xiang)移動速率(lv)(lv)特征,對(dui)實(shi)際澆鑄過程(cheng)中(zhong)(zhong)多例漏鋼樣本的共性特征進行了統計和歸納。
結果表明:結晶器銅(tong)板(ban)溫度變化速率、幾(ji)何特征與(yu)傳播速率能(neng)夠作(zuo)為黏結漏鋼(gang)在線預報的重(zhong)要判(pan)據(ju)(ju),為提(ti)高漏鋼(gang)預報系統(tong)準確率提(ti)供(gong)(gong)參考,減少漏鋼(gang)事(shi)故,同時為結晶器可(ke)視化、智能(neng)化監(jian)控技術開發提(ti)供(gong)(gong)方法和依據(ju)(ju)。
