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    輥壓機生料終粉磨系統取代球磨機的改造張建業"王虔虔2,韓修銘2

    技術應用 | 來源:本網 | 發布日期:2017-10-26 查看次數:617

    核心提示:  輥壓機生料終粉磨系統取代球磨機的改造張建業王虔虔2,韓修銘2(1.山東山鋁水泥有限公司,山東淄博255051;2.中建材(合肥)粉體科技裝備有限公司,安徽合肥230051)表1新增設備名稱型號及主

      輥壓機生料終粉磨系統取代球磨機的改造張建業王虔虔2,韓修銘2(1.山東山鋁水泥有限公司,山東淄博255051;2.中建材(合肥)粉體科技裝備有限公司,安徽合肥230051)表1新增設備名稱型號及主要參數輥壓機HFCG160-140,輥徑:1輥寬:1功率:2xl120kW氣流分級機HFV4000,最大喂料量:lt/h,選粉風量:m3/h高速板鏈提升機提升速度:2.5111/111丨11,功率:1601雙'高速板鏈提升機提升速度:6.5m/min,功率:160kW穩流稱重倉企業自制表2原料配比、綜合水分及易磨性原料配比石灰石:鐵粉:砂頁巖:螢石:鋁礬土=8'2.43%:5.59%:8.56%:0.83%:2.59%原料平均綜合水分/%2.83邦德功指數/(kWh/t)13.57表3輥壓機生料終粉磨系統平均產量和單位產品電耗山鋁水泥有限公司現有兩條2 500t/d熟料生產線,1號線建于2002年,2號線建于2007年。2號線生料制備系統采用的是FLSMIDTH公司生產的ATOX50立式磨系統,電耗月統計平均為18kWh/t.1號線原生料制備采用的是05mx10.5m風掃磨系統,產能190t/h,電耗月統計平均27kWh/t.2011年和2013年用輥壓機對1號線生料制備系統分別進行了兩次技改。2014年春節期間技改工程完成后,生料質量及產能穩定,總產量300t/h以上,系統電耗砭15kWh/t.棍壓機運行平穩,棍面磨損很小,液壓系統及電氣自動化控制、傳動系統運行良好。

      1改造方案第次技改是在原風掃磨系統前增加了套HFCG140-80輥壓機預粉磨系統,改造后系統產量約275t/h、電耗23kWh/t,球磨機運行電流由原來350A下降至300A,達到了增產降耗目的,實現了當年投產當年投資回收。但由于風路系統沒有合適技改方案,沒有得到同步有效技改,系統電耗仍然較高。為此,實施了第二次技改,采用一套HFCG160-140輥壓機+HFV4000型氣流分級機替換原有的cD5mxl0.5m風掃磨,并與原有球磨機系統中的熱風供應、生料選粉和廢氣處理系統組合。第一次技改時配置的HFCG140-80輥壓機系統與本次改造系統并聯。

      1號線生料系統技改后總工藝流程見。新增設備見表1.新建廠房尺寸是12.8mx5.8mxl2.5m. 2生料制備系統改造后能效測試國家建筑材料工業水泥能效環保評價檢驗測試中心及中建材(合肥)粉體科技裝備有限公司對1號線技改后的HFCG160-140+HFCG140-80輥壓機終粉磨生料制備系統及2號線立磨生料制備系統進行了能效測試。

      2.1 1號線生料制備系統各項測試標定指標分別見表2和表3. 1號線技改后總工藝流程平均臺時產量(濕基)/(t/h)平均臺時產量(干基)/(t/h)R02I%單位干基產品電耗2平均臺時產量(濕基)是根據庫底皮帶秤喂料量確定的數值;3丨干基臺時產量是根據濕基數據、原料水分和成品水分確定的。

      結論:系統產量、質量穩定,生料細度易控,各項指標均完成設計目標值,操作維護和管理方便;技改工程新增設備少,土建工程量小,停產時間短,投資省;循環風機電耗較高,低壓系統電耗略高,該系統還測定項目平均臺時產量(濕基)/(t/h)平均臺時/%單位干基產品電耗/(kWh/t)輥壓機生料有進一步降低能耗的空間。

      2.22號線生料制備系統ATOX50立磨生料粉磨系統工藝流程見,主機設備見表4.標對比見表7.兩套生料制備系統原料組分及配比、易磨性、水分、粒度基本相同;生料品質接近,細度、水分基本相同;測試方法、氣候條件接近相同;操作管理要求相同;而表7中噸生料電耗,1號線采用輥壓機技改的生料制備系統較立磨系統低2.81kWh/t,充分顯示了輥壓機制備生料的節電優越性。

      表7輥壓機與立磨系統指標對比立磨生料粉磨工藝流程表4立磨生料粉磨系統主機設備沂南中聯水泥公司生料制備系統也是中建材(合肥)粉體科技裝備有限公司的輥壓機終粉磨系統,其生料制備系統能效測試數據見表8.表8沂南中聯水泥公司輥壓機生料終粉磨系統測試數據名稱規格及主要參數立磨ATOX50,生產育g力:'280t/h;阻力:5000~6OOOPa;主電動機型號:YRKK800-6;功卓:3150kW循環風機Y6-2x40-全壓:10標態含塵濃度:入口1000g/m3;出口100g/m3斗式提升機NSE500xl4300,輸送能力:400t/h;電動機型號:Y200L-4;功:30kW斗式提升機NSE200x,輸送能力:t/h;電動機型號:Y225S-4;功率:37kW各項測試標定指標分別見表5和表6.原料平均配比石灰石:鐵尾渣:頁巖:煤矸石:石英砂表5原料配比、綜合水分及易磨性原料配比石灰石:鐵粉:砂頁巖:螢石:鋁礬土表6立磨生料粉磨系統平均產量和單位產品電耗平均臺時產量平均臺時產量R.c 2平均臺時產量(濕基)為根據庫底皮帶秤喂料量確定的數值;3丨干基臺時產量是根據濕基數據、原料水分和成品水分確定的。

      2.3輥壓機系統與立磨系統指標對比輥壓機生料終粉磨系統與立磨生料粉磨系統指沂南中聯水泥公司原料與1號線原料的易磨性和水分非常接近,沂南中聯產品細度略粗,而電耗卻比我公司少2.12kWh/t.所以,1號線將進行風機效能測試,進行風機改造后,有望進步降低能耗。

      3結束語目前我國采用球磨機制備水泥生料的生產線還有不少,2000年之前投產的水泥生產線大部分采用球磨機,2000年之后投產的,部分原料硬度較高、磨蝕性較大的,還是采用球磨機。球磨機制備生料電耗較高,平均都在23~28kWh/t左右。為了節能和降低生產成本,采用輥壓機取代球磨機,利用原有球磨機系統中的熱風供應、生料選粉和廢氣處理系統進行改造形成輥壓機終粉磨系統不失為一個優選方案。

      (編輯胡如進)

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