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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。
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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。
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CaO,SO3 in the clinker and the granularity,specific surface area,granulometric grading,admixture,plaster of cement,these factors will all effect the ISO cement strength,so we have a systemic and optimizing subject.
CaO、SO_3微量组分，煅烧温度，以及水泥制备中的细度、比表面积、颗粒级配、混合材、石膏等对水泥ISO强度都有影响，因此这是一个系统的优化的课题。
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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。
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And under the action of compound activators, it can react directly with slag and sand to produce environment-protecting cementingmaterial with 28d compressive strength above 30Mpa and various kinds ofconstruction products.
本研究由于不需要对磷石膏进行水洗、煅烧等预处理，在复合激发剂作用下可直接与矿渣、砂等作用，生产出28天抗压强度大于30MPa环保型胶凝材料和各种不同的建筑制品，不仅节能，而且不产生二次污染。
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calcined gypsum：烧石膏
calcined clay 煅烧的粘土 | calcined gypsum 烧石膏 | calcined magnesia 煅镁氧
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calcined gypsum：煅烧的石膏
calcined coke | 煅烧过的焦炭 | calcined gypsum | 煅烧的石膏 | calcined lime | 烧石灰, 生石灰
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calcined clay：煅烧的粘土
calcination 煅烧 | calcined clay 煅烧的粘土 | calcined gypsum 烧石膏