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34 条记录 (耗时 0.016 秒)

    Method for improved manufacture of cement in long kilns
    31.
    发明授权
    Method for improved manufacture of cement in long kilns 失效

    公开(公告)号：US5451255A

    公开(公告)日：1995-09-19

    申请号：US168058

    申请日：1993-12-15

    申请人： Eric R. Hansen ,  James R. Tutt

    发明人： Eric R. Hansen ,  James R. Tutt

    IPC分类号： C04B7/44 ,  F27B7/20 ,  F27B7/36 ,  F27D17/00 ,  C04B7/43

    CPC分类号： F27D17/001 ,  C04B7/44 ,  F27B7/2016 ,  F27B7/36 ,  F27B2007/367 ,  Y02P40/121 ,  Y02P40/126

    摘要： The present invention is directed to a method and apparatus for controlling the kiln gas stream in a conventional long wet or dry process cement kiln. A portion of the kiln gas stream can be withdrawn from the rotary kiln vessel at a point upstream, relative to kiln gas flow of the chain system in the mineral drying zone. Alternatively, or in conjunction with bypass formation, the apparatus can be used to add tertiary air to the kiln gas stream to promote combustion efficiency downstream of the clinkering zone. Use of the present apparatus to form a kiln gas bypass stream enhances operating efficiencies of long kilns by reducing dust loss, by facilitating isolation of high alkali by-product streams, by reducing alkali content of collected kiln dust, by increasing energy efficiency of long kiln operation, and by allowing greater overall control in the cement manufacturing process.

    Method of manufacturing cement raw mix
    34.
    发明授权
    Method of manufacturing cement raw mix 失效
    制造水泥原料混合料的方法

    公开(公告)号：US4395290A

    公开(公告)日：1983-07-26

    申请号：US339089

    申请日：1982-01-13

    申请人： Osvaldo A. Oller ,  Eric R. Hansen ,  Gerard L. Eaker

    发明人： Osvaldo A. Oller ,  Eric R. Hansen ,  Gerard L. Eaker

    IPC分类号： B28C7/02 ,  C04B7/36 ,  G05D11/13 ,  C04B7/02

    CPC分类号： G05D11/131 ,  B28C7/02 ,  C04B7/362

    摘要： A process for the production of cement raw mix which takes into account variations which may occur in the raw materials being introduced into the raw mix, particularly such variations which occur in the limestone. The process disclosed involves the periodic adjustment in the estimated chemical composition of the raw materials used to produce the raw mix in response to the degree of divergence between the actual proportions (W.sub.i) of the raw materials mixed and the "theoretical" proportions (T.sub.i) which theoretically would have generated the raw mix that was produced over the previous time interval. Based upon the revised estimated chemical compositions, the desired characteristics of the raw mix over the next specific subsequent interval are reselected to adjust the overall chemical composition of the raw mix towards the overall desired characteristics, while maintaining continuity in the raw mix being produced and avoiding undesirable fluctuations in the composition. The disclosed method incorporates the detection of weighfeeder malfunctions through the comparison of the degree of divergence for each raw material with selected maximum permissible divergences. Actual characteristics of the raw mix produced are estimated through the use of a time weight raw mix matrix.

    摘要翻译： 考虑到可能在引入原料混合物中的原料中可能发生的变化的水泥原料混合物的生产方法，特别是在石灰石中发生的这种变化。 所公开的方法涉及根据混合原料的实际比例（Wi）和“理论”比例（Ti）之间的偏差程度，对用于生产原料混合物的原材料的估计化学成分进行周期性调整， 这在理论上将会产生在之前的时间间隔内产生的原始混合物。 基于修订的估计化学成分，重新选择在下一个特定后续间隔中的原料混合物的期望特性，以将原料混合物的总体化学成分调整到总体期望特性，同时保持生产的原料混合物的连续性，并避免 不良波动的组成。 所公开的方法通过比较每个原材料的发散程度与所选择的最大允许分歧来检测称重给料机故障。 通过使用时间重量原料混合物矩阵来估计生产的混合料的实际特性。