大型顶吹平炉冶炼硅钢

大型顶吹平炉投产以来，由于降碳速度快，因而造渣困难，脱硫能力差，长期不能冶炼硅钢。针对上述问题，对造渣工艺进行改革，获得成功，不仅降低了消耗，提高了质量，缩短了熔炼时间，而且也满足了用户对硅钢的要求，同时，取得了较大的经济效益。     

控冷电磁站搬迁方案的改进

通过大量的调查研究，查清了电磁站内渗漏水的缺陷，提出了解决方案和具体操作方法，改变了原定的搬迁方案，不仅彻底地消除了缺陷，还节约了大修费，缩短了工期，为生产创了可观的效益。     

承钢“八五”期间科技进步及效益综述

承钢“八五”期间坚持“科技是第一生产力”的思想，紧紧依靠技术进步，狠抓节能降耗，增产增收，投资７亿余元用于科技进步的项目，实现了高炉喷吹煤粉，连铸，连轧，热电联产等工艺技术并已取得了显著的经济效益，经济技术指标水平明显提高，有力地促进了企业的发展，提高了市场竞争的能力，保证了经济效益的提高，为“九五”的进一步发展奠定了基础。     

10t"O"型龙门吊的改进与探索

本文介绍10t“0”型龙门吊通过静定车架结构代替传统的超静定结构的改进，其造型美观，受力合理，降低了精度要求，节省了大量的材料，降低了成本，使制造工艺更加方便，大大降低了金属结构的自重，改善了起重机的运行状态，延长了驱动车轮的寿命，故障率低，维修费用少。     

煤气加压站系统研究与优化

热电厂煤气加压站经过系统优化改造后，设备运行可靠，操作方便，满足了生产工艺要求，实现了变频调速，消除了煤气的泄漏现象，达到了节电，节油，节约维修费用的目的，经济效益可观。     

铝-钪(2%)合金的制备

传统的生产铝钪合金的方法，成本高，条件复杂，不利于工业生产，我们对金属热还原制取A1—Sc合金进行了研究，简化了生产条件，降低了对原料的要求，缩短了工艺流程，降低了生产铝钪合金的成本，开拓了铝钪合金的应用市场。     

焦化厂回收易地大修暨脱硫脱氰工程简介

本文叙述了国内先进的煤气净化工艺和氨、硫回收装置，净化了焦炉煤气，减少了环境污染，改善了硫铵质量，增加了硫磺新产品，提高了生产管理水平，确保了安全生产。     

铝冶炼供电系统节能降耗的措施

湖北丹江哆嗦业公司三期技改工程供电整流系统采用了较多的新技术，新设备，新工艺，在该前提下，对运行参数进行详细研究，达到合理利用电能的目的，同时采用全面质量管理工作的方法，成功地改善了电流的稳定性，减少了设备停运率，为安全生产提供了有力的保障，达到了节能降耗的目的，取得了一定的经济效益。     

基于问题原型的采矿方法选择专家系统的研究

本文针对矿山的实际需要，以矿山工作人员应用对象，在充分分析矿块回采问题的基础上，提出了三种问题原型，建立了领域问题的知识库，编制了推理机，用户接口，解释，知识库管理等程序模块，形成了采矿专家系统的框架，为进一步开发奠定了基础。     

速度和创新决定一切——浅谈朝阳百盛锆业有限公司发展历程

主要介绍了朝阳百盛锆业有限公司的发展历程，展望了公司的发展前景，指出了公司的进步得益于创新和速度，提出了创一流企业，创一流产品，开拓创新，永无止境，服务社会，追求卓越的发展宗旨。     

合金元素对Fe基金刚石节块胎体组织及性能的影响

选取Fe、Cu、Sn、Ni四种金属粉末作为烧结金刚石节块的胎体材料,设计混料试验预测成分变化对胎体性能的影响规律。结果表明:胎体中主要含α-Fe相、γ（Fe,Ni）相、Cu_13.7Sn固溶体和Cu₃Sn化合物。随Sn质量分数的升高,Cu_13.7Sn固溶体减少,脆性Cu₃Sn相增多,当Sn质量分数增大到一定程度后,组织中Cu_13.7Sn固溶体全部转化成Cu₃Sn脆性相,因此,胎体硬度先增高后趋于稳定;Sn质量分数越高,胎体中脆性相越多,割裂基体,胎体抗弯强度下降。Ni易固溶于Cu、Fe中,产生固溶强化,Ni质量分数升高,胎体硬度和抗弯强度均有一定程度的提高;在Sn质量分数较低时,Cu质量分数越高,Cu_13.7Sn固溶体量越多,胎体硬度下降;在Sn质量分数较高时,Cu质量分数越高,组织中脆性Cu₃Sn相量越多,胎体硬度提高。Cu易与Ni、Fe形成置换式固溶体,产生固溶强化作用,Cu质量分数的升高对胎体抗弯强度有一定程度的提高。     

Slag Melting Characteristic of Slag Forming and Slag Splashing for BOF Less Slag Smelting

 The slag melting characteristic of slag forming and slag splashing for 300 t BOF less slag process is researched by combining the methods of the slag chemical composition, the melting point determination and the petrographic analysis. The results show that the melting point of final slag for less slag smelting is 20 ℃ lower than that for conventional smelting. According to results of the petrographic analysis, the C3S (3CaO·SiO2) and C2S (2CaO·SiO2) content for less slag smelting are lower than those for conventional smelting, while the RO (FeO, MgO, MnO, etc) phase and C4AF (4CaO·Al2O3·Fe2O3) phase are higher than those for conventional smelting. According to results of the chemical analysis, the (CaO) content and slag basicity for less slag smelting are higher than those for conventional smelting, while (FeO) and (MgO) content in slag for less slag smelting are almost equal to those for conventional smelting. The reason why slag melting point for less slag smelting is lower than that for conventional smelting is that the quantity of added fluorite for less slag smelting is more than that for conventional smelting. According to the analysis results the slag melting point is determined by the C3S, C2S, RO phase and C4AF content. According to the results of slag melting characteristic before and after slag splashing for less slag smelting, the present adjusting slag process has little effect. It is important to adjust the composition of BOF final slag. The (FeO) content in slag is to be reduced at the slag splashing and adjusting slag process for less slag smelting.     

GOR冶炼不锈钢深脱硫工艺

以70 t EAF-GOR-LF-CC工艺生产304不锈钢为背景,分别对GOR冶炼过程初始钢液、终点钢液以及还原渣取样分析,重点考察了还原渣碱度、渣中残余Cr2O3质量分数(w((Cr2O3)))以及钢液初始硫质量分数(w([Ss]))对钢液深脱硫效果的影响规律,得出了以下结论：还原渣碱度对脱硫有较大影响,高炉渣碱度有利于钢液脱硫,但当炉渣碱度达到1.75以上时,炉渣碱度对终点硫质量分数(w([Sf]))的影响逐步变小。还原渣中残余Cr2O3对脱硫有阻碍作用,尽可能降低渣中w((Cr2O3))有利于提高GOR脱硫效果,当w((Cr2O3))降低到0.3%以下时,表观渣-钢间硫分配比(LS°=w((S))/w([S]))明显升高。GOR初始钢液硫质量分数越低,越容易获得最终低硫钢液,当w([Ss])＜0.07%时,钢液中最低w([Sf])更容易降低到0.004%以下。根据GOR工业试验结果得出了冶炼终点时优化的表观渣-钢间硫分配比( LS°)随还原渣碱度、w((Cr2O3))和w([Ss])的变化关系。     

Ibuprofen controlled-release formulation. A clinical trial in dental impaction pain

The effects of 17 beta-estradiol (E2) and treadmill exercise on tibial bone mass, tibial uptake of 45Ca, and proximal tibia osteoblast and osteoclast cell number were determined in adult ovariectomized rats. Female rats aged 10 months were ovariectomized and divided into five groups: (1) sham-operated; (2) ovariectomized; (3) ovariectomized, given 10 micrograms E2 biweekly; (4) ovariectomized, trained to exercise on a treadmill daily; and (5) ovariectomized, given E2 and exercised. E2 and/or exercise interventions were started 2 months following surgery and continued for 4 months. The calcium content of the tibial metaphysis and diaphysis and the proximal cancellous bone (BV/TV) were lower in the ovariectomized than in the sham-operated controls 6 months after ovariectomy. This lower bone content was associated with a greater bone uptake of 45Ca and a greater number of osteoblasts and osteoclasts in the proximal tibia compared to the control rats. The metaphyseal calcium content was higher and the 45Ca uptake and osteoblast and osteoclast number were lower in the E2-treated rats than in the nontreated rats. In the exercised group, higher diaphyseal calcium content and proximal cancellous bone were associated with lower bone resorption parameters without a significant effect on bone formation. This study demonstrates that E2 primarily influences tibial cancellous bone of the ovariectomized rat and a positive adaptation to exercise occurs in both cancellous and cortical bone. Under estrogen deficiency, E2 replacement suppresses increased bone formation and resorption; exercise suppresses mainly bone resorption. The effects of E2 replacement and exercise training are independent and additive.     

铁水包预处理脱钛理论分析与试验研究

为降低铁水的钛含量,采用烧结矿或铁精粉进行铁水包脱钛预处理.采用500 kg中频感应炉对铁水脱钛进行了试验研究,并对脱钛过程热力学进行了分析.结果表明,相同温度下,烧结矿脱钛表观平衡常数明显大于铁精粉脱钛表观平衡常数.脱钛过程前4 min平均脱钛速率最大,可达0.033 ％/min,16～20 min阶段平均脱钛速率为0.000 7％/min.20 min内,脱钛率可达57.19％～71.20％.脱钛剂中氧利用率的计算结果表明,终渣中剩余氧量占脱钛剂供氧量的4.8％～9.3％,脱钛氧利用率平均为12.28％,低于脱硅氧利用率(43.34％)和脱碳氧利用率(20.18％).另外,试验结果表明,炉渣碱度增大,脱钛率提高.因此,为降低铁水钛含量,应适当提高脱钛渣碱度.     

K3AlF6-Na3AlF6-AlF3铝电解体系密度的研究

采用流体静力称重法研究了K<,3>AlF<,6>-Na<,3>AlF<,6>-AlF<,3>铝电解质体系的密度.探讨了K<,3>AlF<,6>,AlF<,3>含量和温度与K<,3>AlF<,6>-Na<,3>AlF<,6>-AlF<,3>体系密度的关系.实验结果表明:K<,3>AlF<,6>-Na<,3>AlF<,6>-AlF<,3>体系密度与温度成较好的线性关系,温度升高,密度降低;随着AlF<,3>含量的降低,体系的密度对温度的变化更加敏感.相同过热度下,固定KR(钾冰晶石含量),随着AlF3含量的增加,体系的密度呈现出不同的变化规律,相同过热度条件下,对于较低的KR=0.1值,随着AlF<,3>含量的增加,体系的密度逐渐下降,对于较高的KR=0.5值,随着AlF<,3>含量的增加,体系密度先降低后增加,存在最低点.相同过热度下,固定AlF<,3>含量,随着KR增加,体系密度也呈现出不同的变化规律,当AlF<,3>为22%,随着KR增大,体系密度变化不大;当AlF<,3>为26%,30%,随着KR增大,体系密度先降低后增加.     

Al2O3质量分数对高碱度烧结矿软熔滴落性能影响

 对Al2O3质量分数不同的高碱度烧结矿进行了荷重软化熔滴试验,并通过对不同温度下烧结矿微观结构和矿物组成的分析,进行了Al2O3质量分数对烧结矿软熔滴落性能影响机制的探讨。试验结果表明：Al2O3质量分数增加促进了还原过程中钙铝黄长石(2CaO·Al2O3·SiO2)和浮士体共晶相(2CaO·SiO2-2CaO·Al2O3·SiO2-FeO)等低熔点富铝相的生成,导致高Al2O3烧结矿在较低温度下出现开气孔孔隙封闭,从而降低了压差陡升温度。在熔融滴落阶段,高Al2O3烧结矿中渣相的Al2O3质量分数较高。存在于金属铁颗粒之间渣相的液相线和黏度随Al2O3质量分数增加而提高,在一定程度上降低金属铁颗粒的聚合,使得烧结矿的滴落温度提高。同时,高Al2O3烧结矿具有较宽的熔滴区间,使得熔融滴落区间的透气性较差。     

Laboratory Analysis of Carbon Dioxide Hydrate-Bearing Sands

Gas hydrates are ice-like compounds composed of water molecules that encapsulate natural gas molecules in a very compact form. Three groups of CO2 hydrate-bearing sand specimens were formed using a specialized triaxial test apparatus at different temperature and different pressure to examine the physical effects, such as stress and deformation changes, of hydrate dissociation on the surrounding soil. The triaxial test data indicate: (1) the higher the pressure, the higher hydrate content; (2) the lower the temperature, the higher hydrate content; (3) the greater the amount of gas hydrate initially present in the specimen, the greater the reduction of effective stress upon dissociation and the lower strength; and (4) dissociation of even a small percentage of gas hydrates will cause a dramatic reduction in the soil strength and could lead to failure.     

Transport Properties of Rare Earth Manganese Oxide La_(0.67)Ca_(0.33)Mn_(1-x)Fe_xO_3

CompoundsofthetypeLn1-xAxMnO3(Ln =rareearth ,A =Ca ,Ba ,Sr ,etc .)havebeenthepopularsubjectsofextensiveresearchrecently ,mainlyduetotheexistenceofcolossalmagnetoresistance(CMR ) [1～ 3] .Atroomtemperature ,theperovskitecompoundLnMnO3isantiferromagneticinsulatorwhereMnistrivalent .ThepartialsubstitutionoftrivalentLnionswithdivalentionssuchasCa ,Ba ,Sr ,andPbetc .yieldsanewcompoundexhibitingstrongferro magnetismandhighmetallicconductivity .Thetrans portpropertyinthesecompoundscanbepartly…     

高速铁路轨道用钢中铝含量控制研究

通过计算的方法研究了高速铁路轨道用钢中铝含量的控制措施,计算结果表明:在LF精炼工况下,重轨钢中的硅元素可以将渣中的Al2O3还原到钢中,从而引起钢中铝含量的增加。因此,通过控制炉渣低碱度、低Al2O3及把钢中硅含量控制在下限,可以将钢中铝含量控制在较低水平。