硬石膏

As the temperature increases, content of quartz, anhydrite, and hematite in coal ash decrease in reducing conditions and some new mineral phases are formed during heating process. The content of mullite formed in the heating process is the mayor reason of high melting temperature of the ash. Anorthite at high temperature lowers the ash fusion temperature.

随着温度的升高，煤灰中石英、硬石膏、赤铁矿等结晶矿物含量逐渐减少，生成新的矿物质，莫来石的生成是导致淮南煤灰熔点高的主要原因，钙长石起到降低灰熔点的作用。

The main cause of such phenomena is that feldspar solution provided sources for the deposition of anhydrites in dissolved pores.

造成这种现象的主要原因是储层中长石矿物的溶解为硬石膏在孔隙中的沉淀提供了物质来源。

Such saline ore bodies as the gypsum and lazulite , etc. are presenting a more intact ring, and the ore body is distributed all around. The annular top has already been destroyed, have shown its primitive shape may be one salt dome.

硬石膏和天青石等盐类矿体在整体呈一较完整的环形分布，矿体均分布于四周，环形的顶部已被破坏，展示了其原始形态可能为一盐丘。

METHODS: 311 working cast models were selected to perfuse with three kinds of tray including small size, middle size and large size randomly in clinic.

以期依据分类指导临床灌注模型，控制超硬石膏粉的用量和标准水粉比例，达到提高模型质量、节约材料的目的。

PURPOSE: The objective of this study was to survey the amount of working cast model of denture restoration, and to calculate the amount of die stone powder of each working cast model, then to classify the working cast model, with the expectation to perfuse the working cast model in clinic according to this classification, and to achieve the goal of increasing quality of working cast model and saving materials.

目的：通过测量义齿修复工作模型重量，计算各模型所含超硬石膏粉的用量，再按其粉用量，对义齿修复工作模型进行统计学分类。

The manufacture technology of complex wall material from wheat straw and hard plasterboard was researched.

研究了麦秸/硬石膏板复合墙体的制造工艺。

The results show that the mineral phases of coal ashes which are ashed at 815℃ mainly include quartz, anhydrite, hematite, portlandite, lime and potash feldspar.

结果表明，815℃煤灰的主要晶体矿物质组成为石英、硬石膏、赤铁矿、氢氧钙石和石灰等。

Mineral observations show that the inner wall of this chimney is composed of cubanite,and the outer wall of the chimney is mainly composed of anhydrite.

矿物学观察表明，该喷口烟囱体内壁主要由方黄铜矿组成，而外壁则主要由硬石膏组成。

Using methods of sedimentary and geochemistry, this paper analyzed the sedimentary environment in the Majiagou Formation. It suggests that Member 1, Member 3 and Member 5 are characterized by a dry and hot climate as well as fall of the sea level. The area of Well Longtan 1 in the eastern basin is abundant of platform evaporites with the depositional anhydrite and salt rock, surrounded by a suite of dolomite intercalated by the thin layers of anhydrite from the anhydrite\|dolomite platform sediment. It deposits muddy dolomite, dolomitic limestone and fine\|grained dolomite in the limestone-dolomite platform and restricted sea.

运用沉积学与地球化学方法，分析了研究区马家沟组的沉积环境，认为：马一段、马三段和马五段沉积时期气候干热，海平面下降，盆地东部龙探1井区一带主要为台地蒸发岩相沉积，发育了膏盐岩和盐岩沉积，其周边则发育了一套白云岩夹薄层硬石膏岩的含膏云坪相沉积，在盆地东部周边地区主要沉积了泥质白云岩、白云质灰岩和细晶白云岩的云灰坪和局限海相沉积。

Compared with general fly ash, CFB boiler fly ash is mainly composed of anhydrite and lime mineral, and its has erose grain and high -CaO and SO3 content.

对比普通粉煤灰性能，CFB锅炉粉煤灰具有颗粒形貌不规则-CaO和SO3含量高，以及以硬石膏和石灰作为主要矿物组成等特点。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。