烧石膏

Experimental results show that,when calcined gypsum and calcined alunite were added by 5% alone or synchronously,the setting time of cement decreases remarkably and 3d compressive strength at different temperatures increases remarkably.

试验结果表明，烧石膏和烧明矾石单掺和复合双掺的掺入量为5%时，水泥的凝结时间明显缩短，3d耐压强度在各温度下均有显著提高。

Hydration behavior and related physical properties of cement at lower temperatures (28℃) with natural gypsum replaced by calcined gypsum and calcined alunite were studied,and XRD,DTA and SEM measurement analyses were conducted.

摘 要：用烧石膏和烧明矾石代替天然二水石膏进行了水泥常温和较低温度(28℃)下的有关物理性能试验，并借助于XRD、DTA和SEM测定分析了水化产物相。

SO3 is fixed in ashes at 850~900℃, and it exists in Ⅱ-CaSO4 and has different solubility with the natural anhydrite and the plaster calcined at 400℃.

SO3是在850~900℃的温度下形成的，是以Ⅱ-CaSO4形态存在，且具有与天然硬石膏和400℃煅烧石膏不一样的溶解特性。

The chemical activating mechanism of UA is that CG can stimulate pozzolanicity more effective than gypsum because of higher solubility and looser crystal structure; but CG has poor property on retardation setting, and this shortage can be solved by mixing with gypsum; CS can offer alkali activity, which can depolymerize silica and aluminum glass, and benefit for other activity methods and overcome the disadvantage of HF on setting time; Sodium sulfate improves early strength greatly but loses the final strength. NF can improve both early and final strengths.

联合激发技术的化学激发机理是，煅烧石膏溶解度高及晶体结构松弛，比天然石膏的活性激发效率高，但降低石膏的缓凝作用，与天然石膏混合既可提高活性又能保持缓凝作用；干法电石渣提供碱激发，促进高钙灰中硅、铝玻璃体解聚，并克服高钙灰对凝结时间的不利影响；硫酸钠虽然早强作用明显，但使后期强度倒缩，NF使各龄期活性都得到提高；磨细的物理激发使高钙灰大颗粒中的CaO和富集碳组分被磨细、分散，活性增加而危害性降低。

On one hand we take the waste gypsum, pyritic slag as the main resources. Proportion is such as follows: scree 15%, pyretic slag 30%, waste gypsum 45%, cement 10%, then take the semi-dried method, high pressure moulding to produce the waste gypsum and pyrite cinder brick which resist pressure is over 100~# brick resist pressure.

实验一方面以工业废石膏和硫酸烧渣为主要原料，按石屑15%，硫酸烧渣30%，废石膏45%，胶结料10%；半干法高压成型，再自然养护，制成废石膏硫酸烧渣砖，强度达到100~#以上。

The fields of application of calcined FGD gypsum were gypsum wallboard,building plasters,self-leveling floor plaster,etc;The fields of application of uncalcined FGD-gypsum were cement, agricultural soil amendment, etc.

经煅烧的脱硫石膏的应用领域主要有：石膏墙板、建筑灰泥、自流平地板灰泥等；未经煅烧的脱硫石膏的应用领域主要有：水泥、农业土壤改良等。

A new technology of direct fluidizing calcination for FGD gypsum is introduced in this paper. The technology is able to calcine FGD gypsum homogeneously, to control the quality easily, to produce plaster with high compressive strength and bending strength.

综合国内外石膏焙烧技术的发展，并结合脱硫石膏的物性特点，以及一定的焙烧实践经验，本文介绍了一种新型的脱硫石膏直接流化焙烧技术，该技术具有物料受热均匀、产品质量易控制、焙烧设备运行可靠等特点，通过该技术所焙烧的建筑石膏相均匀性好，强度高。

ABSTRACT Mechanical properties of soil stabilized cement made from kiln ash, which consists of clinkers made from kiln ash only or the kiln ash with CaSO4-CaF2 compound mineralizer and certain amount of gypsum are studied. Moreover, the effects of burning temperature and gypsum content on the strength of the stabilized soil with kiln ash cement have been researched.

摘 要 研究了用纯窑灰、掺CaSO4-CaF2复合矿化剂的窑灰烧熟料与适量石膏混合配制的窑灰水泥稳定土的力学性能，并探讨了烧温度和石膏掺量对窑灰水泥稳定土强度的影响。

The FGD gypsum can become plaster by calcination and be utilized as the raw materials of construction.

脱硫石膏为二水石膏，经过焙烧后成半水石膏并加以利用可作为优质的建材产品之一。

The no-baking toughening haydite is produced with fly ash 50-60 wt%, slaked lime powder 5-15 wt%, gypsum powder 5-10 wt%, fiber 3-5 wt%, gas former 0.05-0.3 wt%, and water 20-25 wt%, and through mixing, forming and steam curing.

一种免烧增韧陶粒，其特征在于它由粉煤灰、消石灰粉、石膏粉、纤维、发气剂和水原料搅拌混合后成型蒸养而成，各原料所占质量百分比为：粉煤灰50-60、消石灰粉5-15、石膏粉5-10、纤维3-5、发气剂0.05-0.3、水20-25，各原料所占质量百分比之和为100％。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。