无水芒硝

The evaporating experimental results show that, hydromagnesite is first separated with the lake-water being concentrated, and then halite, thenardite, bloedite, picromerite, epsomite, sylvite and carnallite precipitated successively.

蒸发实验的结果表明：首先析出水菱镁矿，随着湖水继续浓缩进一步析出石盐、无水芒硝、白钠镁矾、软钾镁矾、泻利盐、钾石盐和光卤石。

In recent years, chemical industry in Jiangsu Hongze southerly, Meishan, Sichuan, Hunan Hengyang such as Glauber's salt resource-rich areas, the acquisition of a large number of Glauber's salt mining rights, the anhydrous sodium sulfate southerly annual chemical sales of about 1.6 million tons, for the world and domestic market share has reached 70%; barium sulfate annual sales of about 40,000 tons for the first in the country.

近年南风化工在江苏洪泽、四川眉山、湖南衡阳等芒硝资源丰富地区，收购了大量芒硝矿的开采权，南风化工的无水硫酸钠年产销量约为160万吨，为世界第一，国内市场占有率已达70%；硫酸钡年产销量约4万吨，为全国第一。

Aim\ The technological condition required to get anhydrous sodium sulfate from the industrial coarse mirabilite is discussed.

目的 研究用 DTB型结晶器从工业粗制芒硝中制取无水硫酸钠的工艺条件。

Compared with the method via first preparation mirabilite, the direct preparation has the advantages of shorter process flow, fewer equipment, less investment, lower energy consumption and lower cost.

该方法与先制芒硝，再由芒硝制无水硫酸钠的方法相比，具有工艺流程短、设备少、投资省、能耗低和成本低等优点。

Through the testing and analysis, it is found that thenardite salt rock is a kind of soft rock, the strength of which is low and the deformation is distinct.

通过试验，发现无水芒硝岩盐是一种软岩，强度较低，变形较大。

Na2SO4:Tm3+ phosphors were prepared by heating pure natural thenardite with TmF3 at 900℃ for 20 min in air.

在空气中900℃温度下，将纯天然无水芒硝(Na2SO4)和TmF3的混合粉末加热20分钟，制备了Na2SO4：Tm3+发光材料。

Back in Hong Kong, Chinese thenardite producer Lumena Resources (thenardite is a key ingredient in powder detergents, textiles, glass, chemical feedstock and pharmaceuticals) rang up 19% in gains on June 17. On June 22, the IPO of China Metal Recycling closed 22% higher. See pictures of China's infrastructure boom.

回到香港，中国的无水芒硝生产商旭光资源（无水芒硝是洗衣粉、纺织品、玻璃、化工原料和药品的一种关键配料）6月17日收益率达到19%。6月22日，中国金属再生资源有限公司IPO收盘时上涨了22%。

Sodium sulfate saturated bittern was obtained after well drilling water-soluble method in Huai ′ an,Jiangsu.By solarization salt-making process,it can produces massive salty gypsum (CaSO4·2H2O) and thenardite (Na2SO4),but its comprehensive utilization value is not high.

江苏省淮安地区的岩盐资源可得到硫酸钠型次饱和卤水，对其进行日晒制盐时产生大量的盐石膏（ CaSO4·2H2O ）和无水芒硝（ Na2SO4），综合利用价值不高。

It was found that halite was closely cemented with soil particles, thenardite (Na_2SO_4) was transformed from mirabilite (NasSO_4·VlOH_2O) by dehydration, and the glanberite [Na_2Ca (SO_4)_2] was formed by calcium sulfate and sodium sulfate. These salt crystals separated were clear, without any mixture.

扫描电子显微镜的照片，展示出某些盐类结晶的自然特征，它们是：与土粒胶结紧密的石盐、由芒硝(Na_2SO_4·10H_2O)脱水转变成的无水芒硝(Na_2SO_4)、或由硫酸钠、硫酸钙形成的复盐——钙芒硝Na_2Ca(SO_4)_2。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。