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矿冶:2022,31(4):-
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安徽某铁矾渣制备免烧砖泛碱现象抑制试验
(1.铜陵有色金属集团铜冠建筑安装股份有限公司;2.矿冶科技集团有限公司)
Experiment on inhibition of overburning in baking-free brick made from jarosite slag in Anhui Province
Chen gui-bin1,2,2,2,3,4,2,2,2,3,5, Li wei-guang6
(1.Tongling Nonferrous Copper Crown Jian&2.amp;3.#39;4.&5.an Co., Ltd;6.BGRIMM Technology Group)
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投稿时间:2021-11-03    修订日期:2021-11-11
中文摘要: 铁钒渣是热酸浸出湿法炼锌过程的副产物,铁钒渣具有成分复杂、含硫高等特点,导致其难以作为大宗建材的主要原料,目前尚无有效资源化利用手段。利用铁钒渣粒度较粗、结构稳定等特点,以安徽某铁钒渣为主要原料制备免烧砖,通过正交试验确定了相同试验条件下铁钒渣免烧砖体系获得最高7 d、28 d强度的最优配方,但由于铁钒渣的掺入导致砖坯在养护过程中出现了泛碱、粉化现象,为防止泛碱现象引起免烧砖强度的降低,通过进一步改善铁钒渣免烧砖体系的成型压力、水灰比、外加剂种类等试验条件,明显改善了铁钒渣的泛碱现象,最终制备出的免烧砖28 d抗压强度可达23.56 MPa,满足《JC422-2007 非烧结垃圾尾矿砖》的标准要求,为铁钒渣在免烧制品中的大量应用提供了理论依据。
中文关键词: 铁钒渣  免烧砖  泛碱  耐久性  抗压强度
Abstract:Iron-vanadium slag is a by-product of zinc hydrometallurgy by hot acid leaching. Iron-vanadium slag has the characteristics of complex composition and high sulfur content, which makes it difficult to be used as the main raw material of bulk building materials. At present, there is no effective resource utilization method. Taking advantage of the characteristics of coarse particle size and stable structure of iron-vanadium slag, a certain iron-vanadium slag in Anhui province is used as the main raw material to prepare baking-free brick. The optimal formula of iron-vanadium slag baking-free brick system with the highest strength of 7d and 28d under the same test conditions is determined by orthogonal test. However, the mixing of iron-vanadium slag leads to the phenomenon of overburdening and pulverization in the curing process of brick blank. In order to prevent the overburdening phenomenon from reducing the strength of baking-free brick, By further improving the test conditions such as molding pressure, water-cement ratio, additive types, etc., the efflorescence of iron-vanadium slag is obviously improved. The 28d compressive strength of the finally prepared unburned brick can reach 23.56MPa, which meets the standard requirements of JC422-2007 Non-sintered Waste Tailings Brick, and provides a theoretical basis for the extensive application of iron-vanadium slag in unburned products.
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陈贵斌,李伟光.安徽某铁矾渣制备免烧砖泛碱现象抑制试验[J].矿冶,2022,31(4):.

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