顶央铝矾土质高铝水泥 耐火水泥 铝酸盐水泥

【高铝水泥产品介绍】：

    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主要成分、氧化铝含量约50%的熟料，再磨制成的水硬性胶凝材料。    高铝水泥常为黄或褐色，也有呈灰色的。具有快硬、早强、耐腐蚀、耐高温的水硬性胶凝材料；它既是一种优质的建筑材料，也是一种胶凝性散状耐火材料，在冶金、建材、石油化工、电力、食品等行业有着广泛的应用。

【产品技术要求】：

     1、细度：水泥颗粒越细，比表面积越大，水化反应越快越充分，早期和后期强度都较高。国家规定：比表面积应大于300平方米/千克，否则为不合格。

     2、凝结时间：为保证在施工时有充足的时间来完成搅拌、运输、成型等各种工艺，水泥的初凝时间不宜太短；施工完毕后，希望水泥能尽快硬化，产生强度，所以终凝时间不宜太长。硅酸盐水泥的初凝时间不得早于45分钟，终凝时间不得迟于390分钟。

     3、体积安定性：水泥浆体在凝结硬化过程中体积变化的均匀性称为水泥的体积安定性。如体积变化不均匀即体积安定性不良，容易产生翘曲和开裂，降低工程质量甚至出现事故。

     4、 耐火水泥的烘烤耐火水泥炉衬进行烘烤时，必须注意下列事宜:
    1) 常温350度阶段，Zui易引起局部爆裂，要特别注意缓慢烘烤。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，要适当延长保温时间。
    3) 当用重油烘烤时，要严防重油喷在炉衬表面，以防局部爆裂。
    4) 当用木柴烘烤时，直接接触火焰处往往造成局部升温过急，应加以防护。
    5) 对新浇捣的耐火水泥，至少要经3d后才可进行烘烤。
    6) 对耐火水泥炉衬的冷却也应缓慢，避免强制通风。

【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）；

    运输储存期间防止包装破损，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，不得与其他品种水泥混合存放。 

    运输方式根据客户需求安排。

high alumina cement [products]:

high alumina cement is also known as the alumina cement, refractory cement, aluminate cement, collectively referred to as aluminate cement, is in bauxite and limestone as the raw material, the sintering of clinker have to calcium aluminate as main component, alumina content is about 50%, and then ground into a hydraulic binding material. high alumina cement usually yellow or brown, also has a grey. with rapid hardening, early strength, corrosion resistance, high temperature resistance of hydraulic cementitious material; it is a kind of high building materials, is also a kind of cementitious powdered refractory material, is widely used in metallurgy, building materials, petrochemical, power, food and other industries.

technical re for products []:

1, the fineness of cement: the finer the particle size, larger specific surface area, the hydration reaction of the faster and more fully, early and late strength high. the provisions of the state: specific surface area should be more than 300 square meters / kg, otherwise unqualified.

2, the setting time: in order to ensure the construction when there is sufficient time to complete mixing, transportation, forming the various technology such as cement, the initial setting time should not be too short; after the construction, hope as soon as possible to produce cement hardening, strength, so the final setting time shoulds not be too long. the initial setting time of portland cement shall not be earlier than 45 minutes, the final setting time not later than 390 minutes.

3, the volume stability: cement slurry in setting and hardening process uniformity volume change is called the soundness of cement. such as the volume change not uniformly bad soundness, prone to warping and cracking, reduce the engineering and even the emergence of accident.

4, refractory cement baking refractory cement lining baking, must pay attention to the following matters:

1) at room temperature 350 degrees phase, most likely caused by local burst, special attention should be paid to slow baked. as in the 350 degree heat preservation still has a lot of steam, still should slow heating rate.

2) poor ventilation and moisture is difficult to discharge conditions, appropriate to extend the time of heat preservation.

3) when using heavy oil when baking to prevent heavy oil sprayed on the surface of the furnace lining, to prevent local burst.

4) when using firewood baked, direct contact with the flame often cause local heating up too fast, should be protected.

5) on refractory cement new cast, at least by 3d shall be carried out only after baking.

6) on refractory cement lining cooling should be slow, to avoid the forced ventilation.

[packing and shipping]:

the packing bag is a moisture barrier bags, each bag weighs 50kg (also can be packaged according to customer re); packaging to prevent damage during transportation and storage, in order to avoid leakage or mixed with debris; cement in the transport and storage, shall not be affected with damp and mixed with debris, may not be stored with other varieties of cement mixing. according to the customer demand arrangement mode of transport.