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    球團用硅砂磨粉工藝的研究

    技術應用 | 來源:本網 | 發布日期:2017-11-18 查看次數:510

    核心提示:  硅砂處理量90 3試驗研究及方案比選3.1設備調研通過前期設備調研與考察,根據硅砂物理特性和產品質量要求(表1),認為對輥、立磨和球磨機均能滿足硅砂磨粉工藝要求,其工作原理及性能特點如下:對輥的理

      硅砂處理量90 3試驗研究及方案比選3.1設備調研通過前期設備調研與考察,根據硅砂物理特性和產品質量要求(表1),認為對輥、立磨和球磨機均能滿足硅砂磨粉工藝要求,其工作原理及性能特點如下:對輥的理論基礎為層壓粉碎理論,指大量顆粒聚集在一起,相互接觸所形成的群體粉碎。磨機工作時,一輥子固定在機座上,另一個移動輥在機座上小幅度移動,均被覆特殊耐磨材料制作的輥面。被破碎物料進人對輥磨機的兩個輥子間的粉碎腔,在相向滾動的輥子壓力作用下將粉碎腔的物料壓實,使其容積達到真密度的85%,此時,除了與輥面接觸的顆粒受到輥面直接壓力外,物料顆粒之間也產生相互作用壓力,可導致物料壓實和粉碎。粉碎產品的粒度分布比較寬,含有較多細粒級,呈壓片形狀排出機外。

      ―次性碾壓,單位能耗低;設備緊湊,占地面積少;系統投資較大。

      適用于各種物料的中細碎和超細碎。通常與球磨機組合進行磨礦作業,可大大提高磨粉效率,增產節能;在氧化球團行業,可以對鐵精礦、硅砂進行處理,使其細度達到造球要求。

      立磨電動機通過立式減速機帶動磨盤旋轉,固體原料通過鎖風給料裝置從進料口進人磨盤中心,在離心力場的作用下被甩向磨盤的周邊并受到磨輥的反復碾壓而粉碎。

      粉碎后的物料從磨盤的邊緣溢出,其中的粉狀物料被從機器下部上升的高速氣流帶起,上升的氣流和粉狀物料經過磨機上部的選粉機時,在快速旋轉的轉子作用下,粗粉被分離出來落人磨盤中心重新粉磨。細粉則隨氣流從磨機上部出磨,在收塵裝置中被收集起來,即為產品。沒有被氣流帶走的顆粒物料,溢出磨盤后經外循環的斗式提升機返回磨機進料口,與新給人的原料一起進人磨機重新粉磨。

      1、集粉磨、干燥、分級和輸送功能于一體,相對功能復雜,操作調節較為方便,自動化程度高,單機處理能力大。

      2、出磨產品細度可調,選粉效率高。

      3、磨損小,鋼耗低,盤襯和輥面采用高耐磨材料,使用壽命長。

      4、運行可靠,檢修方便,磨輥檢修時,可翻出機體外。

      5、振動小、噪音低。負壓操作無揚塵,:,U在水泥行業中。適宜于粉磨水泥生料、煤粉和水泥熟料。

      在建材、冶金行業中,適宜于粉磨超細礦渣粉和超細鋼渣粉。

      在火力發電廠,適宜于煤粉的制備和脫硫劑石灰石粉的制備。

      3.1.3球磨機球磨機是由水平的筒體、進出料空心軸及磨頭等部分組成。筒體為鋼板制造。有鋼制襯板與筒體固定。筒內裝有研磨體,研磨體一般為鋼制圓球,并按不同直徑和一定比例裝人筒中。物料由磨機進料端空心軸裝入筒體內磨機第一倉。該倉內有階梯襯板或波紋襯板。當球磨機筒體轉動時候。研磨體由于慣性和離心力、摩擦力的作用,使沾附在筒體襯板上物料被筒體帶走。當被帶到一定的高度時候。由于其本身的重力作用而被拋落。下落的研磨體像拋射體一樣將筒體內的物料給擊碎。物料在第一倉達到粗磨后。經單層隔倉板進人第二倉。該倉內鑲有平襯板。內有鋼球。將物料進一步研磨。而粉狀物通過卸料箅板排出。

      完成粉磨作業。

      磨機處理能力范圍廣,產品細度調節靈活方便。

      系統簡單,運行安全可靠。

      球磨機廣泛應用于水泥。硅酸鹽制品,新型建筑材料、耐火材料、化肥,黑色與有色金屬選礦以及玻璃陶瓷等生產行業。

      3.2方案比選在達到表1所提的產品要求前提下。分別對對輥,立磨和球磨機進行工廠試驗和設備選型。

      ~10t/h時,對輥作為硅砂磨粉設備,雖然產能較大。但系統投資較高,進行一次碾壓后,產品粒度難以滿足要求。且報價較高,缺乏必要的實驗數據。難以滿足要求;立磨作為硅砂磨粉設備。產能大,磨料細。

      形不成料磨料,設備磨損大。且系統復雜。投資太高。不是最佳選擇;球磨機作為硅砂磨粉設備。系統簡單。運行可靠。操作方便。產品的細度可控。投資低。可以予以考慮選擇。

      4硅砂磨粉工藝配置4.1生產規模、工作制度及加工方案(上接第151頁)6結束語目前我們急需要解決的問題就是怎樣提高井下作業的安全系數。盡可能的把難度系數降低。科學技術的發展。

      鉆井液也不斷的創新發展。在一點點的改變不足。盡可能的發揚優點聚磺鉆井液的出現,使深井鉆井方面有了很大的突破。并且也很適合用在鉆井取油。也在一定程度上提升了鉆井的速度。聚磺鉆井液集磺化與聚合物鉆井液的優點。在很大程度上促進了石油的發展。

      根據球團生產需要,一臺1830x7000的球磨機,一年可生產合格硅砂42000~84000t.工作制度為連續工作制。采用四班二運轉。年工作350天。即作業率96%,。

      通過球磨機磨粉后。得到滿足球團生產需要的合格細度硅砂,:,4.2工藝流程硅砂磨粉工藝從接受貯存開始至成品硅砂運出為止。

      包括硅砂的接收與貯存、斗提機人倉、球磨機磨粉、布袋收塵、成品硅砂外運。

      硅砂的接受與貯存硅砂通過汽車外運至受料斗。或者先運到料場。通過鏟車送到受料斗。

      受料斗與斗提機相連接。將硅砂提升至硅砂原料倉。

      硅砂原料倉和球磨機通過溜管或通過法蘭連接。將原料從球磨機進料口送人球磨機內。進行磨粉。

      考慮環保要求。在磨機的排料端設有布袋收塵裝置。

      經球磨機磨后的合格硅砂。通過排料端溜槽進人外運皮帶,運送至配料室料倉。或者直接參與配料。

      4.3工藝配置硅砂磨粉工藝車間內設原料場。外加偏跨。配置受料斗1個。斗式提升機1臺。礦(有效容積貯存時間12h),球磨機1臺,布袋收塵器1臺,外運皮帶1條(或斗式提升機1臺)。同時。考慮設備檢修等因素。車間配有1臺50t的電動單梁懸掛式起重機,并設檢修平臺。

      5結論1)通過分析研究球團工程中所用硅砂特性,就對輥、立磨和球磨機三種設備進行考察和試驗研究,認為球磨機作為細磨主體設備無論從能耗、系統流程還是投資上比其他兩種設備更具有優勢。更恰當合理。

      2)通過分析比選。最終確定了當硅砂處理量在5 ~101/h時合理可行的硅砂加工工藝流程。找出了最佳工藝配置。

      為球團工程設計應用奠定了基礎。

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