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电炉生产低碳低硅钢的难点是电炉的终点控制、脱氧合金化以及钢中[Al]的控制和精炼炉抑制回硅.介绍了八钢110t电炉生产SPHC钢从原材料到冶炼过程严格按标准化操作,电炉精炼及连铸全程保护浇注,防止钢水的二次氧化减少夹杂物带入的生产实践. 相似文献
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以实现有效电极工作端为理想炉况的主要标志,通过分析硅铁、硅钙和硅铬合金生产过程中炉瘤的生成机理,阐述了锰硅炉瘤的生成及对炉况的影响,并结合对锰硅电炉炉况的控制,总结了锰硅电炉炉瘤的控制方法。 相似文献
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通过对硅铬电炉和锰硅电炉参数、冶炼原理的分析,以及正确的生产过程控制,硅铬电炉在不改变参数的情况下,可以转产锰硅合金,技术指标较好。 相似文献
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矿热电炉是金川火法冶炼流程中的关键冶金设备,实际生产中电炉炉用负荷和料坡的高低对电炉熔炼的影响很大,章介绍了利用2#矿热电炉处理铜镍混合焙砂,合理调控二次电压,严格控制料坡高度,稳定 炉况,考察较高二次电压的合理范围及对应的料坡控制高度的实验,并分析了实验结果,得出了相应结论。 相似文献
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锰硅合金炉渣中锰回收率的影响因素 总被引:1,自引:0,他引:1
根据电炉冶炼锰硅合金的实际生产经验,分析了锰硅合金生产过程中影响锰硅合金炉渣含锰量的主要因素。同时指出,只要把这些主要因素控制在合适的范围内,就可降低渣中的含锰量,提高锰的回收率。 相似文献
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在生产SWRH82B过程中,电炉出钢后依次加入碳粉和硅锰合金,通过对实际生产过程中不同碳含量炉次中硅锰合金收得率进行分析,得出LF进站钢水中碳含量对后续硅锰合金收得率具有较大影响。钢液碳含量0.2%~0.7%不同炉次下,合金中Mn收得率从78%~87%波动,合金中硅收得率从65%~85%波动。结合冶金热力学基础理论,在不同碳含量条件下对合金在渣铁间的平衡进行分析,钢液碳含量升高可明显降低合金在渣铁间的分配比,这表明在电炉出钢过程中需要提高并精准控制碳粉的加入量,稳定钢包中钢液碳含量,可降低硅锰合金的消耗。 相似文献
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以废旧石英坩埚为原料,在850℃的氯化钙熔盐中直接电解制备硅粉。采用XRD、SEM和ICP-AES对粉体进行表征和杂质含量检测。结果表明,电解后的粉体为呈准球形的单质硅,硼﹑磷杂质含量低,适合于制备太阳能级硅。 相似文献
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Kouji Yasuda Kunio Saegusa Toru H. Okabe 《Metallurgical and Materials Transactions B》2011,42(1):37-49
To develop a new production process for solar-grade Si, a fundamental study on halidothermic reduction based on the subhalide
reduction of SiCl4 by Al subchloride reductant was carried out at 1273 K (1000 °C). Aluminum subchloride reductant was produced by reacting
AlCl3 vapor with metallic Al. Silicon tetrachloride was reduced to Si in a gas-phase reaction by vapors of Al subchloride reductant.
Silicon deposits produced in the halidothermic reduction were analyzed by X-ray diffraction (XRD), scanning electron microscopy
(SEM), and X-ray fluorescence (XRF). The Al content in the Si deposits was no more than 0.5 at pct. The Si deposits have a
fibrous or hexagonal columnar morphology with diameters ranging from 100 nm to several tens of microns. The reaction was discussed
by comparison with the results of the conventional aluminothermic reduction of SiCl4. Moreover, the halidothermic reduction reactions were analyzed from thermodynamical viewpoints. This study demonstrates the
feasibility of a halidothermic reduction for producing solar-grade Si with high productivity. 相似文献
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电感耦合等离子体原子发射光谱法测定低合金钢中硅含量的不确定度评定 总被引:1,自引:0,他引:1
采用电感耦合等离子体原子发射光谱法对低合金钢中硅进行测定,应用统计学理论对其分析结果不确定度的产生原因进行分析,建立测量过程分量的数学模型,分析测量过程不确定度来源及各不确定度分量对总不确定度的影响,确定测定结果的置信区间。给出低合金钢中硅的含量及其置信区间为0.472%±0.014%。 相似文献
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以国内某工业硅生产企业的能源构成及消耗现状为基础,讨论了工业硅生产的能源消耗问题,提出了工业硅工业今后的主要节能方向和途径。 相似文献
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A. Bedolla-Jacuinde M. W. Rainforth I. Mejía 《Metallurgical and Materials Transactions A》2013,44(2):856-872
This work analyzes the effect of different additions of silicon (0 to 5.0 pct) on the structure of a high-Chromium white cast iron, with chromium content of 16.8 pct and carbon 2.56 pct. The alloys were analyzed in both as-cast and heat-treated conditions. Casting was undertaken in metallic molds that yielded solidification rates faster than in commercial processes. Nevertheless, there was some degree of segregation of silicon; this segregation resulted in a refinement in the microstructure of the alloy. Silicon also generated a greater influence on the structure by destabilizing the austenitic matrix, and promoted greater precipitation of eutectic carbides. Above 3 pct silicon, pearlite formation occurred in preference to martensite. After the destabilization heat treatment, the matrix structure of the irons up to 3 pct Si consisted of secondary carbides in a martensitic matrix with some retained austenite; higher Si additions produced a ferritic matrix. The different as-cast and heat-treated microstructures were correlated with selected mechanical properties such as hardness, matrix microhardness, and fracture toughness. Silicon additions increased matrix microhardness in the as-cast conditions, but the opposite phenomenon occurred in the heat-treated conditions. Microhardness decreased as silicon content was increased. Bulk hardness showed the same behavior. Fracture toughness was observed to increase up to 2 pct Si, and then decreased for higher silicon contents. These results are discussed in terms of the effect of eutectic carbides’ size and the resulting matrix due to the silicon additions. 相似文献
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根据硅钢片厂的实际情况,建立了覆盖全厂主要部位的电子计算机局域管理网络。介绍这一网络开发,实施的过程及生产中发挥的作用,指出了今后需要完善的几个方面。 相似文献