共查询到20条相似文献,搜索用时 437 毫秒
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对铝电解槽干法启动和湿法启动的利弊进行分析,并提出了干法无效应启动的改进方案。该方案克服了干法无效应启动存在的弊端,并使其应用于生产实践,相比于湿法启动更加节能、更有利于延长槽寿命。 相似文献
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新钢7号炉由干法喷涂造衬改成湿法喷涂造衬后,能快速恢复并较好地维护高炉操作炉型;通过优化停、开炉措施,实现了安全、快速开炉,降低了干法喷涂造衬所带来的停、开炉风险;湿法喷涂造衬后,7号炉通过优化上下部操作,适当加长风口长度并缩小风口面积,寻找经济冶强等手段,取得了较好的经济技术指标. 相似文献
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简述转炉烟气净化与煤气回收系统中干、湿法流程特点。通过对230t转炉干、湿法方案比较,认为干法系统在节省投资、节能降耗和减少污染等方面具有显著优点。 相似文献
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以江苏省某危废焚烧处置项目为例,对比分析危险废物焚烧后产生的烟气采用"干法小苏打+湿法脱酸"和"干法消石灰+湿法脱酸"的运行总成本.经济与技术分析结果表明:消石灰脱酸产生的飞灰进刚性填埋场填埋时,"干法小苏打+湿法脱酸"的总运行成本低;而消石灰脱酸产生的飞灰进柔性填埋场填埋时,"干法消石灰+湿法脱酸"的总运行成本低. 相似文献
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就转炉干、湿法除尘工艺及对计算机控制系统的要求、综合能耗、技术经济等方面进行了系统的比较.比较结果表明:就工艺及对计算机控制系统的要求而言,干法除尘比湿法除尘复杂的多.从综合能耗和技术经济角度来看,干法除尘具有明显的竞争优势. 相似文献
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A. N. Titenko T. E. Lazurik L. S. Pugacheva A. P. Danil'chuk 《Powder Metallurgy and Metal Ceramics》1976,15(4):310-314
Conclusions It is shown that goethite (yellow ferrie oxide pigment) synthesis by an ammoniacal method offers a suitable means of obtaining, from technical iron vitriol, high-purity ferric oxide with stable properties fulfilling the requirements for ferrite-grade ferric oxide. The ferric oxide is distinguished by its high reactivity after high-temperature (850–900°C) heat treatment. Its physicochemical properties are close to those of 1360 WF grade ferric oxide manufactured by the Bayer Co. of West Germany [5]. The key process parameters in the production of ferric oxide by this method are: goethite synthesis pH 4.0–4.5, synthesis temperature 70–75°C, amount of seed 8–10% of the goethite content at the end of synthesis, and ferric oxide calcining temperature 850–900°C.Translated from Poroshkovaya Metallurgiya, No.4(160), pp. 82–88, April, 1976. 相似文献
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研究了铁浴式熔融还原型熔体的组成与性质的关系,测试了熔体对耐火材料的浸润性,分析了熔体中FeO浓度,熔体温度,耐火材料的组成及结构,耐火材料中石墨碳含量等对熔体与耐火材料间浸润性的影响,同时测试了熔体组成与流动性的关系,熔体中FeO浓度,熔渣碱度对熔体的熔化温度的影响,测定和分析了熔体组成与粘度变化的关系,结果表明,熔中FeO浓度是影响熔体性质的最关键因素,FeO浓度提高,熔体对耐火材料的润湿能力 相似文献
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介绍了以铟冶炼生产过程中产生的废液-萃铟余液为原料,生产高纯铁红的小型试验情况.萃铟余液经过中和残酸、除砷、锑、铜、镉等杂质后,用空气氧化法将溶液中的二价铁氧化,并严格控制氧化过程的温度和酸度,使铁以针铁矿的形式沉淀出来,再经离心分离与洗涤后,进行煅烧,得到高纯铁红,产品经检测达到国家优等品标准. 相似文献
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《Canadian Metallurgical Quarterly》2013,52(1):15-30
AbstractBriquettes of pure ferric oxide and of ferric oxide with 2, 5 and 10 per cent lime were sintered at temp. ranging from 1,000 and 1,300°C. These were reduced by H in a loss-in-weight furnace ar temp. ranging from 550 to 1000°C. The effect of the lime additions upon the reducibility of iron oxide was studied. Similar studies were made on iron-oxide briquettes with 1, 2 and 5 per cent calcium-ferrite additions.It was found that the increase in reducibility re suIting from the addition of lime was due neither to the formation of calcium ferrite nor to the change in the initial porosity or the porosity developed during reduction. Metallographic studies revealed that the mechanism of reduction of ferric oxide is different in the presence of lime from that of pure ferric oxide. An hypothesis for the mechanism of reduction of ferric oxide in the presence of lime is suggested. 相似文献
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钢板酸洗后产生的大量酸洗废液需要进行再生,利用酸再生工艺可生产高品质的氧化铁粉.目前国内大型钢铁公司大部分都引进了Ruthner公司的喷雾焙烧废酸处理技术,该方法由于废酸由喷嘴以喷雾的形式喷入焙烧炉进行反应,故生产出来的氧化铁粉粒径小、品质高.该系统除硅是酸再生的前道工序,用以去除废酸中的二氧化硅等杂质、提高氧化铁粉的化学纯度.文章介绍了通过试验得到的最佳除硅工艺、除锰试剂,降低了锰含量,制取了高品质氧化铁粉. 相似文献
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The temperature dependence has been determined for the wetting by molten aluminum of materials based on aluminum oxide (polycor and corundum). A temperature range has been identified in which the wetting increases significantly. There is no effect on the wetting characteristics of these oxide materials from the addition to the aluminum of up to 25% silicon, 33% copper, or 6% nickel. 相似文献