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    磷石膏粉生產線

    • 分類:生產線
    • 發布時間:2019-05-09 00:00:00
    • 訪問量:0
    概要:
    概要:
    詳情
      利用磷石膏為原材料
      產量: 年產1萬噸到80萬噸
      磷石膏是磷肥工業的固體廢棄物,而磷酸是磷肥工業的基礎。濕法磷酸生產工藝都是通過硫酸分解磷礦粉生成萃取料漿,然后過濾洗滌制得磷酸。過濾洗滌的過程中同時產生磷石膏廢棄物。一般每生產1噸磷酸約產生5---6 噸磷石膏,每生產1 噸磷酸二銨排放2.5---5噸磷石膏,我國濕法磷酸產量約為100多萬噸左右,而隨著我國近年來高濃度復合肥工業的迅猛發展,每年由磷肥類化工企業排出的磷石膏近2000萬噸左右。
      磷石膏一般呈粉狀,因含有8---15%的附著水而呈漿體狀,顆粒直徑一般為5---150μm,其主要成分為CaSO4?2H2O,一般可達到70---90%,其中所含的次要成分隨礦石來源不同而異,成分較為復雜,一般都含有巖石成分、Ca 、Mg的磷酸鹽、碳酸鹽及硅酸鹽,除此之外,還含有少量的有機磷、硫、氟類化合物。磷石膏的外觀一般呈灰白、灰、灰黃、淺黃、淺綠等多種顏色,相對密度為2.22---2.37,容重為0.733---0.880g/cm3。
      磷石膏由于其生產廠家的不同,其成分、顏色、物理性能、雜質含量、雜質種類等都因其產生的工藝和原理而有所不同,但它們都有著以下的一些共同特性:
      1 .磷石膏大多都具有較高的附著水,呈漿體狀或濕渣排出,一般,其附著水的含量都在10---40%,個別的甚至更高。
      2 .磷石膏粒徑較細,粒徑一般均在5---300 微米之間,生產石膏粉時,可節省破碎、粉磨費用,但也會產生大量的粉塵,增加除塵的費用。
      3 .磷石膏一般所含成分較為復雜,含有量少但對石膏水化硬化性能有較大影響的化學成分,PH值呈酸性而非中性。給化學石膏的有效利用帶來較大難度。
      在磷石膏中,有效成分二水石膏的含量一般均較高,可達75---95 % ,相當于二級以上石膏的有效成分含量。如果單論其有效成分含量而不計其有害雜質的影響,工業副產石膏都可作為優質的石膏生產原料。
      因此,采用合適的技術和設備,能夠消除磷石膏中有害成分的影響,磷石膏就會成為一種廉價、高品位、環保的優質生產原料。采用原料預烘干,沸騰爐燃燒的二步法煅燒生產工藝,用裝載機將原料從堆場運至料斗。經打散機、皮帶輸送機。均勻送至回轉烘干機(該處熱源為燃煤熱風爐),出料后經集粉器輸送設備運入立式沸騰爐煅燒(該處熱源為導熱油爐),煅燒完畢后送入球磨機進行研磨改性和冷卻,在提升輸送至成品倉,包裝倉。
      煅燒系統:立式沸騰爐工藝:
      結構簡單占地面積小
      無運轉部件,運行費用低
      由于生產過程徹底流態化,熟石膏相組成比較理想,產品質量穩定。

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