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The present invention is concerned with a method for the extraction of magnesium from magnesium-containing materials such as magnesite, dolomite and silicates materials like serpentine residues, products from the amphibole or pyroxene group.

本发明涉及一种从含镁原料萃取镁的方法，该含镁原料包括菱镁矿、白云石、含镁硅酸盐物质象蛇纹石残渣，来自角闪岩及辉石类的产品。

The results show that: the fillers of SiO_2 based investment consist of SiO_2,Al_2O_3 and MgO,and the binder is NH_4H_2PO_4;for SiO_2 based investment,the bulk density and the compression strength decrease,the apparent porosity and the thermal expansion increase,when the specimens are heated to 900 ℃;the fil.

结果表明：氧化硅系包埋料的骨料是氧化硅、氧化铝、氧化镁，结合剂为磷酸二氢铵，其900℃煅烧后显气孔率增加，体积密度下降，耐压强度降低，热膨胀增大；氧化铝系包埋料的骨料是氧化铝和氧化镁，结合剂为磷酸二氢铵，其900℃烧后显气孔率增加，体积密度下降，热膨胀变化不大；氧化镁系包埋料的骨料是氧化镁和氧化铝，结合剂是铝酸钙水泥，其900℃烧后耐压强度明显降低，热膨胀明显增大。

Also there is much difference between the obtained metastable phase diagram at 35 ℃ and the metastable phase diagram at 25 ℃. The crystallization regions of schoenite(K2SO4*MgSO4*6H2O) and epsomite disappear and arise the crystallization regions of leonite and kainite.

所得35 ℃介稳相图与25 ℃介稳相图区别很大：软钾镁矾和七水硫酸镁结晶区域消失，同时出现了钾镁矾和钾盐镁矾的结晶区域。

Also, our company sale and deal in fireproof material、high and medium magnesite sand、ccm、magnesite brick、magnesite、talc、talc powder、ecectric fused magnesia、pyrope、calcium carbonate、silica、felspar、dolomite、iron ore、cement ore、refractory mortars.

公司同时经销耐火材料、高中档镁砂、轻烧镁粉、镁砖、镁矿石、滑石、滑石粉、电熔镁、镁铝尖晶石、方解石、硅石、长石、白云石、铁矿石、水泥石、喷补料、捣打料。

Long-term with the Luoyang Refractory Material Research Institute, Beijing University of Science and Technology, Anshan University of Science and Technology, such as metallurgy research institutions to collaborate, has developed the metallurgy, coking industry in various grades×, silica brick, clay brick, magnesia brick, magnesia-chrome brick, MgO-C Bricks aluminum, chromium corundum brick, insulation brick light, etc.; cement industry with anti-spalling×, alkali brick, silicon brick Mo, direct combination of magnesia-chrome brick, periclase-spinel brick, phosphorus acid brick, high-phosphate soft Dutch bricks, special bricks, such as phosphate; generating boiler industry with a variety of brands wear-resistant brick, corundum brick, mullite brick, such as stereotyped products and wear resistant castable, corundum castable, high-strength low cement castable, impermeable material, gravity feed can be plastic, various grades, such as fire-resistant mud Unshaped Materials, in which silica brick and light insulation brick production line for the national output of a single one of the largest production line.

公司长期与洛阳耐火材料研究院，北京科技大学，鞍山冶金科技大学等科研院校开展协作，先后开发出冶金，焦化行业用各种牌号高铝砖，硅砖，粘土砖、镁砖，镁铬砖，铝镁碳砖，铬刚玉砖，轻质隔热砖等；水泥行业用抗剥落高铝砖，耐碱砖、硅莫砖，直接结合镁铬砖、方镁石尖晶石砖、磷酸盐砖，高荷软磷酸盐砖、特种磷酸盐砖等；发电锅炉行业用各种牌号耐磨砖，刚玉砖，莫来石砖等定型产品和耐磨浇注料、刚玉浇注料、低水泥高强浇注料、防渗料，自流料，可塑料、各种牌号耐火泥等不定型材料，其中硅砖和轻质隔热砖生产线为全国单台产量最大的生产线之一。

Sales of MgO on the market at present is to light magnesium oxide、light burned magnesia and Heavy magnesium oxide.

目前市场上销售的氧化镁有轻质氧化镁、轻烧氧化镁、重质氧化镁。

The technological parameters of the productive process of light magnesium oxide by ammonium bicarbonate-ammonia pyrogenation technology had been studied.

研究了碳酸氢铵氨水热解法制备轻质氧化镁的工艺条件，考察了原料Mg2+浓度、反应温度、Mg2+与NH3t当量比、NH3与NH4HCO3摩尔比和预氨化pH值对碱式碳酸镁的过滤性能、沉镁效率和碳酸氢铵消耗量的影响，并探讨了煅烧温度、煅烧时间、升温速度对轻质氧化镁视比容的影响。

Crystal lattice constants are close to other experiment results. Three kinds of chemical bonds exist among Mg and B atoms, between magnesium and boride is ionic bond and metallic bond is the predominant interaction in the layer formed by magnesium atoms. A strong covalent bond in the form of sp2 hybrid between boride atoms is the most important factors which can affect the transition temperature of MgB2. Population analysis clearly shows that electrons are transferred from Mg to B, as a result, the electron-phonon coupling in the layer of B is very strong.

规范保守赝势的计算结果表明，晶格常数与实验值误差在很小的范围内，分析了引起MgB2(001)面结构超导转变时电子浓度和偏态密度的变化情况，发现构成该超导体结构的成键有3种，着重从结构的电子浓度变化分析了其超导特性，六角蜂窝状结构中硼原子间相互作用为sp2杂化的共价键，镁原子和硼原子之间是离子键结合，镁原子层是金属键结合，镁原子的价电子部分转移到硼原子的pz轨道，部分电子为镁原子层共用。

By statistical analysis,the normal value of haircalcium and magnesium for healthy children in Jiujiang region was made.1688 children(73.39%)were found rachitis to varied degree,of which,1471(87.14%)had a low level serumal magne-sium simutaneously,The authors think that adding calcium can strengthen therapeutic effective-ness of rachitis caused by vitamine D deficiency.

通过统计学处理，制定出了我市健康小儿发钙、发镁的背景值。发现1688名小儿患有不同程度的佝偻病，占调查人数的73.39％。这组佝偻病患儿中1471例同时伴有低镁，缺镁率为87.14％。作者提出，对维生素D缺乏性佝楼病同时补充钙、镁，可提高疗效。

Through the thermodynamic calculation of the reaction that aluminum and magnesium reduce anhydrous scandium chloride molten salt to prepare aluminium-magnesium-scandium master alloy, we got that the standard equilibrium constant of the reaction is 1.074 ×10~(19), and the experimental equilibrium constant of it is approximately 6.874 × 10~(14)under around 1200 K and 1 standard pressure, which demonstrate that the reaction can take place and proceed thoroughly.

通过铝镁热还原无水氯化钪熔盐制备铝镁钪中间合金反应的热力学计算，得出：在1200K左右温度，1标准大气压下，该反应的标准平衡常数K为1.074×10~(19)，经验平衡常数K′约为6.874×10~(14)，这说明铝镁热还原无水氯化钪熔盐法制备铝镁钪中间合金的反应能够进行，而且进行的很彻底。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。