铝矾土质高铝水泥 专用水泥 硅酸盐 黄/褐色/灰色

【高铝水泥产品引见】

      高铝水泥又称为矾土水泥，耐火水泥，铝酸盐水泥，统称为铝酸盐水泥，是以铝矾土和石灰石为原料，经煅烧制得的以铝酸钙为次要成分、氧化铝含量约50%的熟料，再磨制成的水硬性胶凝资料。高铝水泥常为黄或褐色，也有呈灰色的。具备快硬、早强、耐侵蚀、耐低温的水硬性胶凝资料；它既是一种优质的修建资料，也是一种胶凝性散状耐火资料，在冶金、建材、石油化工、电力、食品等行业有着宽泛的使用。

【高铝水泥技术要求】

      1、细度：水泥颗粒越细，比外表积越大，水化反响越快越充沛，晚期和前期强度都较高。国度规则：比外表积应大于300平方米/千克，否则为不合格。

      2、凝固工夫：为保障在施工时有短缺的工夫来实现搅拌、运输、成型等各种工艺，水泥的初凝工夫不宜太短；施工终了后，心愿水泥能尽快软化，产生强度，所以终凝工夫不宜太长。硅酸盐水泥的初凝工夫不得早于45分钟，终凝工夫不得迟于390分钟。

      3、体积安宁性：水泥浆体在凝固软化进程中体积变动的平均性称为水泥的体积安宁性。如体积变动不平均即体积安宁性不良，容易产生翘曲和开裂，升高工程品质甚至呈现事变。

      4、 耐火水泥的烘烤耐火水泥炉衬进行烘烤时，必需留意下列事宜:
      1) 常温350度阶段，最易惹起部分爆裂，要特地留意迟缓烘烤。如在350度保温后仍有大量蒸汽冒出，仍应减缓升温速度。
      2) 在通风不良、水气不易排出的条件下，要适当延伸保温工夫。
      3) 当用重油烘烤时，要严防重油喷在炉衬外表，以防部分爆裂。
      4) 当用木柴烘烤时，间接接触火焰处往往造成部分升温过急，应加以防护。
      5) 对新浇捣的耐火水泥，至多要经3d后才可进行烘烤。
      6) 对耐火水泥炉衬的冷却也应迟缓，防止强迫通风。

【包装及运输】

      包装袋为防潮袋，每袋重50kg（也可按客户要求包装）；

      运输贮存时期避免包装破损，以免漏失或混入杂物；

      水泥在运输与存储时，不得受潮和混入杂物，不得与其余种类水泥混合寄存。 

      运输形式依据客户需要布置。

High alumina cement also called alumina cement, refractory cement, aluminate cement, aluminate cement is called, with bauxite and limestone as raw materials by sintering clinker by using calcium silicate as main component, the alumina content of about 50%, regrinding made of hydraulic cementitious material. High alumina cement is often yellow or brown, and it is gray. With fast and hard, early strength, corrosion resistance, high temperature resistance of water and hard cement material; it is a kind of high quality building materials, but also a kind of cementitious material. It is widely used in metallurgy, building materials, petrochemical, electric power, food and other industries.
1, fineness: the finer the cement particles, the larger the surface area, the faster the hydration reaction, the early and the later strength are higher. State regulations: specific surface area should be more than 300 square meters / kg, otherwise it is not qualified.
2, setting time: in order to ensure that in the construction have sufficient time to complete the mixing, transportation, molding and other processes, the initial setting time of cement is not too short; after the construction is finished, I hope the cement can be as soon as possible, produce strength, so the final setting time is not too long. The initial setting time of Portland cement should not be earlier than 45 minutes, and the final setting time can not be delayed 390 minutes.
3, volume stability: the cement paste in the process of setting the volume change of the volume change of the size of the cement paste. If the volume change is not uniform, that is, the volume stability is poor, prone to warping and cracking, reduce the engineering quality and even accident.
4, refractory cement baking refractory cement lining baking, must pay attention to the following matters:
1) 350 degrees in room temperature, the most easy to cause a partial burst, to pay special attention to slow baking. If there is still a large amount of steam coming out of the 350 degree heat preservation, it still should slow down the heating rate.
2) in the condition of poor ventilation, water vapor is not easy to discharge, to extend the time of heat preservation.
3) when using heavy oil for baking, to prevent oil sprayed on the surface of the furnace lining, to prevent local burst.
4) when using wood baking, direct contact with the flame is often caused by local heating too fast, should be protected.
5) to the new cast of the refractory cement, at least to be 3D after baking.
6) for refractory cement lining should also slow cooling, avoid forced ventilation.