镁质预制件生产过程中常见问题及处理方法

针对镁质预制件生产过程中遇到的常见问题进行了探讨并提出了相应的处理方法,对镁质预制件的生产有一定的参考价值。     

我厂氯乙烯转化器泄漏原因及其改进措施

介绍了氯乙烯转化器的使用情况,探讨了其腐蚀泄漏的原因及影响因素,经过多次技术改造,认为使用Ｈ－９３型高温缓蚀阻垢剂是一种有效的改进手段。     

镁钙质和镁质中间包涂料对钢液洁净度的影响

通过现场对比实验 ,研究了镁钙质和镁质中间包涂料对钢液洁净度的影响。结果表明 :( 1)两种涂料对钢液均有明显的脱氧作用 ,其脱氧率与钢液的原始全氧含量有关 ,原始氧含量越高 ,脱氧率越大 ;( 2 )对铝镇静钢而言 ,镁钙质涂料有比镁质涂料更好的脱氧效果 ,脱氧率能高出 5 %～ 15 % ;而对硅镇静钢 ,两种涂料对钢液的脱氧效果几乎没有差别 ;( 3)两种涂料对铝镇静钢和硅镇静钢均没有明显的脱硫作用。     

两级液环式氯气压缩机损坏的原因及控制对策

从氯气压缩机的工作原理入手，分析了压缩机损坏的原因：硫酸工作温度高、流速高的联合作用引发设备的腐蚀，而腐蚀产物在设备内未及时排出加快了设备的腐蚀损坏。提出相应的控制措施以达到安全运行的目的。     

浅谈降低汽车内饰件用聚氨酯材料VOC的措施

简单介绍了汽车内饰材料中VOC(挥发性有机化合物)的来源、各国针对汽车内饰材料中VOC制定的相关标准及VOC的检测方法。从选择新型低VOC、低雾化值的原料和在聚氨酯材料中使用具有降低VOC功能的添加剂等方面详细论述了降低汽车内饰件用聚氨酯材料VOC的主要手段。最后指出,开发可持续汽车内饰材料是减少汽车内饰件VOC的一个重要发展方向。     

Transporting slurry for the production of seawater magnesia

Conclusions Hydrated magnesium oxide slurry produced from vacuum filters is unsatisfactorily handled by transportation with belt conveyers and augers.By mechanical blending the slurry into a constant volume it can be transmitted in the homogeneous liquid state, and in this form can be pumped with a gear pump.The expansion of the production of magnesium oxide from brine makes it necessary to use pumping equipment with a capacity of 30–40 m/h. Therefore it is necessary to continue research work in this direction for the design of pumps of the necessary output.Translated from Ogneupory, No. 3, pp. 24–27, March, 1969.     

The production and service testing of magnesia wares from Rapna magnesia

Conclusions Magnesite refractories from Rapna magnesia are of high quality.Tests on periclase — spinel wares from Rapna magnesia in the crowns of Marten's furnaces working under intensified conditions showed that their wear was 15 to 17% lower than that of regular periclase — spinel bricks.It was shown that, by the use of periclase — spinel bricks from Rapna magnesia in the crown of a Marten's furnace working with an oxygen jet, it will be possible to lengthen the run of the furnace by 16–21%.Translated from Ogneupory, No. 7, pp. 1–6, July, 1969.     

锆英石对镁砂烧结性及其制品性能的影响

探讨了锆英石对镁砂烧结性能的影响 ,并研究了由这种合成镁锆砂制成的镁砖的性能。结果表明 :锆英石能显著提高镁砂的烧结性能 ;利用合成镁锆砂制成的镁砖以高熔点的第二固相为结合相 ,性能明显优于普通镁砖     

Investigation of vibro-acoustic characteristics. Design and development of means for reducing the noise of the IM-252 needle-punching machine

Conclusions -- Studies have been carried out on the vibro-acoustical characteristics of the IM-252I machine.-- The mechanism of noise generation and radiation in the operation of the needle-punching machine has been discovered.-- A vibro-acoustical model of the machine has been constructed plus a model of an anti-noise assembly.-- A new construction of the needle plate—elastic element—needle pad for the IM-252I machine has been developed, calculated and tested under manufacturing conditions; it makes it possible to reduce noise to a level which satisfies regulation standards.Translated from Khimicheskie Volokna, No. 6, pp. 53–55, November–December, 1990.     

氧化镁—锆英石钢包浇注料的研制

以电熔镁砂和锆英石为原料,研制了氧化镁-锆英石钢包浇注料,并研究了锆英石加入量对浇注料性能的影响及热处理温度对浇注料强度的影响,同时对其机理进行了探讨.     

Properties and structure of magnesia modifiers for converter slags

Recently with the aim of increasing the stability of converter linings there has been extensive use of a new class of synthetic magnesia modifiers that are added directly to the converter melt during steel melting. The chemical composition of modifiers and method for their preparation are provided. The basis of the magnesia modifiers is MgO oxide and its compounds. Modifier properties (density, open porosity) are studied in relation to a change in specimen heating and the mineral composition of modifiers of different chemical composition, and the change in the structure of modifier specimens during heating is examined. The mechanism of modifier dissolution in molten slag is suggested. __________ Translated from Novye Ogneupory, No. 2, pp. 27–34, February, 2007.     

Application of magnesia concrete and brick for the lining of electric furnaces

Conclusions Self-setting magnesia concrete and solutions are applicable for the lining of electric furnaces in the form of blocks.The testing of magnesia concrete and basic brick blocks is recommended on an industrial level for the verification of their effectiveness in electric furnaces of different capacity.     

The properties of magnesia powders for the hot welding process

A number of powders derived from MgO calcined at various temperatures within the range 770–1770 K was submitted to the treatment usually used in preparation of the batches to welding process (hot-pressing in the presence of liquid salt phase).Changes in powders characteristics during this treatment have been discussed based on results of sedimentation analysis and specific surface area measurements (BET method).The samples made of these powders with and without salt addition (CaCl₂LiCl eutectic mixture) were examined using mercury porosimetry and SEM. It has been shown that powder characteristics and the presence of liquid salt phase essentially influence the results of densification process. Sharp differences have been discovered in apparent densities and total amounts of open pores between the samples hot-pressed with and without salt additions. The former reached densities of about 85% theoretical and the latter were usually lower than 50%.