Article(id=1241416387671937882, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241416382559081210, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2025.03.025, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1735488000000, receivedDateStr=2024-12-30, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773906331222, onlineDateStr=2026-03-19, pubDate=1748707200000, pubDateStr=2025-06-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773906331222, onlineIssueDateStr=2026-03-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773906331222, creator=13701087609, updateTime=1773906331222, updator=13701087609, issue=Issue{id=1241416382559081210, tenantId=1146029695717560320, journalId=1235980550691926019, year='2025', volume='45', issue='3', pageStart='1', pageEnd='223', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773906330003, creator=13701087609, updateTime=1773908015401, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241423451685179940, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241416382559081210, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241423451685179941, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241416382559081210, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=151, endPage=157, ext={EN=ArticleExt(id=1241416387948761968, articleId=1241416387671937882, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Purification of Spherical Graphite by Alkali-Acid Method, columnId=1236276106727321817, journalTitle=Mining and Metallurgical Engineering, columnName=METALLURGY, runingTitle=null, highlight=null, articleAbstract=
To address the issues of low purity and high consumption of alkali and acid during chemical purification of graphite, Luobei spherical graphite was taken to explore the occurrence state of impurities therein and to perform tests on its purification by alkali-acid method. A novel alkali-acid method was developed, which consists of stirring with alkali under negative-positive pressure and pressure acid leaching. This purification process is conducted in the following steps with the optimized conditions: firstly leave graphite in a vacuum for 35 min with vacuum degree of -0.15 MPa, and then stir for 40 min under pressure of 0.19 MPa at 120 ℃ by adding NaOH at a concentration of 40%, with NaOH solution and spherical graphite in a liquid-to-solid ratio of 1.0 mL/g;after 120 min roasting at 550 ℃, acid leaching with HCl at a concentration of 2.5 mol/L is performed under pressure of 0.16 MPa at 118 ℃ for 90 min, with HCl solution and graphite in a liquid-to-solid ratio of 1.0 mL/g. As a result, the fixed carbon content in the purified graphite is up from 95.35% to 99.96%.
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针对石墨化学提纯过程中提纯纯度不高、碱酸用量大等问题,以萝北球形石墨为研究对象,研究球形石墨中杂质的赋存状态,开展碱酸法提纯试验研究,开发出负-正压混碱加压酸浸的碱酸法提纯工艺。结果表明,负-正压混碱加压酸浸的碱酸法提纯工艺的优化条件为:石墨在真空下静置35 min、真空度-0.15 MPa,加压搅拌时氢氧化钠浓度40%、压力0.19 MPa(加压温度120 ℃)、搅拌时间40 min、氢氧化钠溶液与球形石墨的液固比1.0 mL/g,焙烧过程中焙烧时间120 min、焙烧温度550 ℃,酸浸时HCl浓度2.5 mol/L、压力0.16 MPa(酸浸温度118 ℃)、盐酸溶液与石墨的液固比1.0 mL/g、酸浸时间90 min,该条件下石墨提纯后固定碳含量由95.35%提升至99.96%。
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张文学(2000—),男,云南楚雄人,硕士研究生,主要研究方向为非金属矿选矿及深加工。E-mail:2118754958@qq.com
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张文学(2000—),男,云南楚雄人,硕士研究生,主要研究方向为非金属矿选矿及深加工。E-mail:2118754958@qq.com
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1.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
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2015., articleTitle=Experimental research on the alkali-acid method purification of graphite and kinetics of desilication, refAbstract=null)], funds=[Fund(id=1241422278915846987, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, awardId=2021YFC2902902, language=CN, fundingSource=国家重点研发计划(2021YFC2902902), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241422260330885491, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, xref=1., ext=[AuthorCompanyExt(id=1241422260335079796, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, companyId=1241422260330885491, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2.矿物资源与加工湖北省重点实验室,湖北 武汉 430070)])], figs=[ArticleFig(id=1241422266202911325, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.1, caption=
XRD pattern of spherical graphite, figureFileSmall=HdX3M6EyKdysTTx8KHqqgw==, figureFileBig=n92DDBoeVWqjO6wwzHr6ZQ==, tableContent=null), ArticleFig(id=1241422266349711973, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图1, caption=
球形石墨XRD图谱, figureFileSmall=HdX3M6EyKdysTTx8KHqqgw==, figureFileBig=n92DDBoeVWqjO6wwzHr6ZQ==, tableContent=null), ArticleFig(id=1241422266542649963, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.2, caption=
Particle size distribution of spherical graphite, figureFileSmall=/z9daGFJ49TAg6vR9asU6w==, figureFileBig=mGfZl8Z43ddJmMYQNaQTtA==, tableContent=null), ArticleFig(id=1241422266618147442, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图2, caption=
球形石墨的粒度分布, figureFileSmall=/z9daGFJ49TAg6vR9asU6w==, figureFileBig=mGfZl8Z43ddJmMYQNaQTtA==, tableContent=null), ArticleFig(id=1241422266802696830, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.3, caption=
SEM images of spherical graphite, figureFileSmall=G1Q122+CgH7RrFAbDfN7qA==, figureFileBig=SC/x5fJCK9M1tTegsoPd6A==, tableContent=null), ArticleFig(id=1241422266957886086, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图3, caption=
球形石墨SEM照片, figureFileSmall=G1Q122+CgH7RrFAbDfN7qA==, figureFileBig=SC/x5fJCK9M1tTegsoPd6A==, tableContent=null), ArticleFig(id=1241422267117269644, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.4, caption=
Process flow diagram of traditional alkali-acid method, figureFileSmall=sVlVU58Et9jCfYSJs+SMtA==, figureFileBig=rnPLeUbJsZxVM7qVwvd+Mg==, tableContent=null), ArticleFig(id=1241422267238904463, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图4, caption=
常规碱酸法提纯工艺流程, figureFileSmall=sVlVU58Et9jCfYSJs+SMtA==, figureFileBig=rnPLeUbJsZxVM7qVwvd+Mg==, tableContent=null), ArticleFig(id=1241422267406676632, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.5, caption=
Process flow diagram of optimized alkali-acid method, figureFileSmall=HPm6W6YMc25cEgg8OLGodQ==, figureFileBig=RMhqjzpKmwczLS31EttsNQ==, tableContent=null), ArticleFig(id=1241422267519922845, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图5, caption=
负-正压混碱加压酸浸的碱酸法提纯工艺流程, figureFileSmall=HPm6W6YMc25cEgg8OLGodQ==, figureFileBig=RMhqjzpKmwczLS31EttsNQ==, tableContent=null), ArticleFig(id=1241422269092786849, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.6, caption=
SEM images of spherical graphite, figureFileSmall=XnjA9SaLDrKW+s2XinWO7g==, figureFileBig=sbVx1EW1/nDJbAzhExxXcw==, tableContent=null), ArticleFig(id=1241422269256364712, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图6, caption=
球形石墨SEM照片, figureFileSmall=XnjA9SaLDrKW+s2XinWO7g==, figureFileBig=sbVx1EW1/nDJbAzhExxXcw==, tableContent=null), ArticleFig(id=1241422269394776750, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.7, caption=
FIB-SEM images of spherical graphite, figureFileSmall=0aG7aYLmjAHYZcVT/BJKkw==, figureFileBig=e2wX5osomw0HoKZucY/xGg==, tableContent=null), ArticleFig(id=1241422269495440054, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图7, caption=
球形石墨FIB-SEM照片, figureFileSmall=0aG7aYLmjAHYZcVT/BJKkw==, figureFileBig=e2wX5osomw0HoKZucY/xGg==, tableContent=null), ArticleFig(id=1241422269583520443, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.8, caption=
EDS spectra of spherical graphite, figureFileSmall=ZHlt09zun+/8mp5UF7IZiA==, figureFileBig=E8K/ewdHLm+GTa4q1jtwKA==, tableContent=null), ArticleFig(id=1241422269835178689, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图8, caption=
球形石墨EDS谱图, figureFileSmall=ZHlt09zun+/8mp5UF7IZiA==, figureFileBig=E8K/ewdHLm+GTa4q1jtwKA==, tableContent=null), ArticleFig(id=1241422269986173641, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.9, caption=
XRD patterns of products obtained during optimized alkali-acid method, figureFileSmall=rOYa5TzWbh74U2Z5jBCvgw==, figureFileBig=6K+iZU4aWMfjkEWjPiT47A==, tableContent=null), ArticleFig(id=1241422270174917326, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图9, caption=
球形石墨负-正压混碱加压酸浸的碱酸法提纯过程中各产品XRD图谱, figureFileSmall=rOYa5TzWbh74U2Z5jBCvgw==, figureFileBig=6K+iZU4aWMfjkEWjPiT47A==, tableContent=null), ArticleFig(id=1241422270397215444, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Fig.10, caption=
SEM images of purified graphite by traditional and optimized alkali-acid methods, figureFileSmall=7BebpaMYGZ8Ee0j8ZuW23g==, figureFileBig=DaPChKf02iw8wyPQiYQaQA==, tableContent=null), ArticleFig(id=1241422270518850266, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图10, caption=
不同方法提纯后球形石墨SEM照片(a)常规碱酸法;(b)负-正压混碱加压酸浸的碱酸法
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EDS spectrum of purified graphite by optimized alkali-acid method, figureFileSmall=FV8zQ3BGULXtXuLLwlXldg==, figureFileBig=eql5o0+7hExdC9n+Jdt5vg==, tableContent=null), ArticleFig(id=1241422270724371170, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=图11, caption=
负-正压混碱加压酸浸的碱酸法提纯后球形石墨X射线能谱图, figureFileSmall=FV8zQ3BGULXtXuLLwlXldg==, figureFileBig=eql5o0+7hExdC9n+Jdt5vg==, tableContent=null), ArticleFig(id=1241422270846005990, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 1, caption=
Chemical composition of raw materials
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| SiO2 | Al2O3 | Fe2O3 | K2O | Cl | CaO | TGC | LOI |
|---|
| 1.46 | 0.74 | 0.63 | 0.165 7 | 0.009 | 0.032 | 95.35 | 96.95 |
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原料化学成分分析结果(质量分数)
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| SiO2 | Al2O3 | Fe2O3 | K2O | Cl | CaO | TGC | LOI |
|---|
| 1.46 | 0.74 | 0.63 | 0.165 7 | 0.009 | 0.032 | 95.35 | 96.95 |
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EDS analysis results of cross-section of graphite
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| C | Si | Fe | Al | O | Ca |
|---|
| 95.40 | 1.29 | 0.87 | 0.47 | 1.83 | 0.17 |
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石墨截面EDS测试结果(质量分数)
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| C | Si | Fe | Al | O | Ca |
|---|
| 95.40 | 1.29 | 0.87 | 0.47 | 1.83 | 0.17 |
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EDS analysis results of suspected mineralization positions
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| C | Si | Fe | Al | O | Ca |
|---|
| 83.66 | 4.55 | 2.63 | 2.00 | 6.69 | 0.47 |
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疑似矿物点EDS测试结果(质量分数)
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| C | Si | Fe | Al | O | Ca |
|---|
| 83.66 | 4.55 | 2.63 | 2.00 | 6.69 | 0.47 |
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Effect of mass ratio of sodium hydroxide to graphite on fixed carbon content
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| 氢氧化钠与石墨质量比 | 固定碳含量/% | 备注 |
|---|
| 0.2 | 96.85 | 焙烧时间90 min,焙烧温度450 ℃ |
| 0.4 | 97.55 |
| 0.6 | 97.85 |
| 0.8 | 98.07 |
| 1.0 | 98.18 |
| 1.2 | 98.20 |
), ArticleFig(id=1241422271949107964, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表4, caption=
氢氧化钠与石墨质量比对固定碳含量的影响
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| 氢氧化钠与石墨质量比 | 固定碳含量/% | 备注 |
|---|
| 0.2 | 96.85 | 焙烧时间90 min,焙烧温度450 ℃ |
| 0.4 | 97.55 |
| 0.6 | 97.85 |
| 0.8 | 98.07 |
| 1.0 | 98.18 |
| 1.2 | 98.20 |
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Effect of roasting time of normal alkaline roasting on fixed carbon content
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| 焙烧时间/min | 固定碳含量/% | 备注 |
|---|
| 30 | 97.45 | 焙烧温度450 ℃,氢氧化钠与石墨质量比1.0 |
| 60 | 97.90 |
| 90 | 98.15 |
| 120 | 98.26 |
| 150 | 98.26 |
| 180 | 98.28 |
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常规碱焙烧时焙烧时间对固定碳含量的影响
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| 焙烧时间/min | 固定碳含量/% | 备注 |
|---|
| 30 | 97.45 | 焙烧温度450 ℃,氢氧化钠与石墨质量比1.0 |
| 60 | 97.90 |
| 90 | 98.15 |
| 120 | 98.26 |
| 150 | 98.26 |
| 180 | 98.28 |
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Effect of roasting temperature of normal alkaline roasting on fixed carbon content
, figureFileSmall=null, figureFileBig=null, tableContent=
| 焙烧温度/℃ | 固定碳含量/% | 备注 |
|---|
| 350 | 97.75 | 焙烧时间120 min,氢氧化钠与石墨质量比1.0 |
| 400 | 97.94 |
| 450 | 98.18 |
| 500 | 98.30 |
| 550 | 98.31 |
| 600 | 98.31 |
| 650 | 98.30 |
| 700 | 98.25 |
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常规碱焙烧时焙烧温度对固定碳含量的影响
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| 焙烧温度/℃ | 固定碳含量/% | 备注 |
|---|
| 350 | 97.75 | 焙烧时间120 min,氢氧化钠与石墨质量比1.0 |
| 400 | 97.94 |
| 450 | 98.18 |
| 500 | 98.30 |
| 550 | 98.31 |
| 600 | 98.31 |
| 650 | 98.30 |
| 700 | 98.25 |
), ArticleFig(id=1241422274042065672, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 7, caption=
Effect of HCl concentration in normal acid leaching on fixed carbon content
, figureFileSmall=null, figureFileBig=null, tableContent=
| 盐酸浓度/(mol·L-1) | 固定碳含量/% | 备注 |
|---|
| 1.0 | 98.59 | 酸浸时间120 min,酸浸温度60 ℃,液固比1.0 mL/g |
| 1.5 | 98.70 |
| 2.0 | 98.79 |
| 2.5 | 98.86 |
| 3.0 | 98.92 |
| 3.5 | 98.91 |
), ArticleFig(id=1241422274155311883, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表7, caption=
常规酸浸时盐酸浓度对固定碳含量的影响
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| 盐酸浓度/(mol·L-1) | 固定碳含量/% | 备注 |
|---|
| 1.0 | 98.59 | 酸浸时间120 min,酸浸温度60 ℃,液固比1.0 mL/g |
| 1.5 | 98.70 |
| 2.0 | 98.79 |
| 2.5 | 98.86 |
| 3.0 | 98.92 |
| 3.5 | 98.91 |
), ArticleFig(id=1241422274318889741, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 8, caption=
Effect of acid leaching temperature in normal acid leaching on fixed carbon content
, figureFileSmall=null, figureFileBig=null, tableContent=
| 酸浸温度/℃ | 固定碳含量/% | 备注 |
|---|
| 40 | 98.86 | 酸浸时间120 min,盐酸浓度3.0 mol/L,液固比1.0 mL/g |
| 50 | 98.88 |
| 60 | 98.92 |
| 70 | 98.95 |
| 80 | 98.95 |
| 90 | 98.95 |
), ArticleFig(id=1241422274394387216, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表8, caption=
常规酸浸时酸浸温度对固定碳含量的影响
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| 酸浸温度/℃ | 固定碳含量/% | 备注 |
|---|
| 40 | 98.86 | 酸浸时间120 min,盐酸浓度3.0 mol/L,液固比1.0 mL/g |
| 50 | 98.88 |
| 60 | 98.92 |
| 70 | 98.95 |
| 80 | 98.95 |
| 90 | 98.95 |
), ArticleFig(id=1241422274499244819, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 9, caption=
Effect of liquid-solid ratio in normal acid leaching on fixed carbon content
, figureFileSmall=null, figureFileBig=null, tableContent=
| 液固比/(mL·g-1) | 固定碳含量/% | 备注 |
|---|
| 0.5 | 98.94 | 酸浸时间120 min,盐酸浓度3.0 mol/L,酸浸温度70 ℃ |
| 1.0 | 98.93 |
| 1.5 | 98.95 |
| 2.0 | 98.94 |
| 2.5 | 98.95 |
| 3.0 | 98.98 |
| 3.5 | 98.96 |
), ArticleFig(id=1241422274742514454, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表9, caption=
常规酸浸时液固比对固定碳含量的影响
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| 液固比/(mL·g-1) | 固定碳含量/% | 备注 |
|---|
| 0.5 | 98.94 | 酸浸时间120 min,盐酸浓度3.0 mol/L,酸浸温度70 ℃ |
| 1.0 | 98.93 |
| 1.5 | 98.95 |
| 2.0 | 98.94 |
| 2.5 | 98.95 |
| 3.0 | 98.98 |
| 3.5 | 98.96 |
), ArticleFig(id=1241422274851566359, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 10, caption=
Effect of acid leaching time in normal acid leaching on fixed carbon content
, figureFileSmall=null, figureFileBig=null, tableContent=
| 酸浸时间/min | 固定碳含量/% | 备注 |
|---|
| 60 | 98.76 | 酸浸温度70 ℃,盐酸浓度3.0 mol/L,液固比1.0 mL/g |
| 90 | 98.87 |
| 120 | 98.92 |
| 150 | 98.96 |
| 180 | 98.95 |
| 210 | 98.95 |
| 240 | 98.96 |
), ArticleFig(id=1241422274943841051, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表10, caption=
常规酸浸时酸浸时间对固定碳含量的影响
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| 酸浸时间/min | 固定碳含量/% | 备注 |
|---|
| 60 | 98.76 | 酸浸温度70 ℃,盐酸浓度3.0 mol/L,液固比1.0 mL/g |
| 90 | 98.87 |
| 120 | 98.92 |
| 150 | 98.96 |
| 180 | 98.95 |
| 210 | 98.95 |
| 240 | 98.96 |
), ArticleFig(id=1241422275061281565, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 11, caption=
Effect of NaOH solution concentration in alkaline roasting at atmospheric pressure on fixed carbon content
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| 氢氧化钠溶液浓度/% | 固定碳含量/% | 备注 |
|---|
| 10 | 98.12 | 液固比1.0 mL/g,焙烧温度450 ℃,焙烧时间90 min |
| 20 | 98.97 |
| 30 | 99.23 |
| 40 | 99.32 |
| 50 | 99.33 |
), ArticleFig(id=1241422275195499297, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表11, caption=
常压碱焙烧时氢氧化钠溶液浓度对固定碳含量的影响
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| 氢氧化钠溶液浓度/% | 固定碳含量/% | 备注 |
|---|
| 10 | 98.12 | 液固比1.0 mL/g,焙烧温度450 ℃,焙烧时间90 min |
| 20 | 98.97 |
| 30 | 99.23 |
| 40 | 99.32 |
| 50 | 99.33 |
), ArticleFig(id=1241422275291968289, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 12, caption=
Effect of liquid-solid ratio in alkaline roasting at atmospheric pressure on fixed carbon content
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| 液固比/(mL·g-1) | 固定碳含量/% | 备注 |
|---|
| 0.5 | 99.04 | 氢氧化钠溶液浓度40%,焙烧温度450 ℃,焙烧时间90 min |
| 1.0 | 99.31 |
| 1.5 | 99.39 |
| 2.0 | 99.39 |
| 2.5 | 99.40 |
), ArticleFig(id=1241422275405214499, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表12, caption=
常压碱焙烧时液固比对固定碳含量的影响
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| 液固比/(mL·g-1) | 固定碳含量/% | 备注 |
|---|
| 0.5 | 99.04 | 氢氧化钠溶液浓度40%,焙烧温度450 ℃,焙烧时间90 min |
| 1.0 | 99.31 |
| 1.5 | 99.39 |
| 2.0 | 99.39 |
| 2.5 | 99.40 |
), ArticleFig(id=1241422275497489191, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 13, caption=
Effect of roasting time in alkaline roasting at atmospheric pressure on fixed carbon content
, figureFileSmall=null, figureFileBig=null, tableContent=
| 焙烧时间/min | 固定碳含量/% | 备注 |
|---|
| 60 | 99.26 | 氢氧化钠溶液浓度40%,液固比1.5 mL/g,焙烧温度450 ℃ |
| 30 | 99.18 |
| 90 | 99.34 |
| 120 | 99.43 |
| 150 | 99.42 |
| 180 | 99.43 |
), ArticleFig(id=1241422275602346792, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表13, caption=
常压碱焙烧时焙烧时间对固定碳含量的影响
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| 焙烧时间/min | 固定碳含量/% | 备注 |
|---|
| 60 | 99.26 | 氢氧化钠溶液浓度40%,液固比1.5 mL/g,焙烧温度450 ℃ |
| 30 | 99.18 |
| 90 | 99.34 |
| 120 | 99.43 |
| 150 | 99.42 |
| 180 | 99.43 |
), ArticleFig(id=1241422275719787308, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 14, caption=
Effect of roasting temperature in alkaline roasting at atmospheric pressure on fixed carbon content
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| 焙烧温度/℃ | 固定碳含量/% | 备注 |
|---|
| 350 | 99.21 | 氢氧化钠溶液浓度40%,液固比1.5 mL/g,焙烧时间120 min |
| 400 | 99.29 |
| 450 | 99.39 |
| 500 | 99.48 |
| 550 | 99.52 |
| 600 | 99.51 |
| 650 | 99.51 |
| 700 | 99.32 |
), ArticleFig(id=1241422275858199343, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表14, caption=
常压碱焙烧时焙烧温度对固定碳含量的影响
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| 焙烧温度/℃ | 固定碳含量/% | 备注 |
|---|
| 350 | 99.21 | 氢氧化钠溶液浓度40%,液固比1.5 mL/g,焙烧时间120 min |
| 400 | 99.29 |
| 450 | 99.39 |
| 500 | 99.48 |
| 550 | 99.52 |
| 600 | 99.51 |
| 650 | 99.51 |
| 700 | 99.32 |
), ArticleFig(id=1241422275992417076, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 15, caption=
Effect of NaOH solution concentration in pressure alkaline roasting on fixed carbon content
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| 氢氧化钠溶液浓度/% | 固定碳含量/% | 备注 |
|---|
| 10 | 98.83 | 压力0.14 MPa(加压温度110 ℃),液固比1.5 mL/g |
| 20 | 99.26 |
| 30 | 99.46 |
| 40 | 99.58 |
| 50 | 99.59 |
), ArticleFig(id=1241422276076303159, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表15, caption=
加压碱焙烧时氢氧化钠溶液浓度对固定碳含量的影响
, figureFileSmall=null, figureFileBig=null, tableContent=
| 氢氧化钠溶液浓度/% | 固定碳含量/% | 备注 |
|---|
| 10 | 98.83 | 压力0.14 MPa(加压温度110 ℃),液固比1.5 mL/g |
| 20 | 99.26 |
| 30 | 99.46 |
| 40 | 99.58 |
| 50 | 99.59 |
), ArticleFig(id=1241422276176966459, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 16, caption=
Effect of pressure in pressure alkaline roasting on fixed carbon content
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| 压力/MPa | 固定碳含量/% | 备注 |
|---|
| 0.10 | 99.47 | 氢氧化钠溶液浓度40%,液固比1.5 mL/g |
| 0.14 | 99.56 |
| 0.19 | 99.63 |
| 0.27 | 99.64 |
| 0.36 | 99.64 |
), ArticleFig(id=1241422276269241147, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表16, caption=
加压碱焙烧时压力对固定碳含量的影响
, figureFileSmall=null, figureFileBig=null, tableContent=
| 压力/MPa | 固定碳含量/% | 备注 |
|---|
| 0.10 | 99.47 | 氢氧化钠溶液浓度40%,液固比1.5 mL/g |
| 0.14 | 99.56 |
| 0.19 | 99.63 |
| 0.27 | 99.64 |
| 0.36 | 99.64 |
), ArticleFig(id=1241422276382487358, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 17, caption=
Effect of liquid-solid ratio in pressure alkaline roasting on fixed carbon content
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| 液固比/(mL·g-1) | 固定碳含量/% | 备注 |
|---|
| 0.5 | 99.45 | 氢氧化钠溶液浓度40%,压力0.19 MPa(加压温度120 ℃) |
| 1.0 | 99.60 |
| 1.5 | 99.64 |
| 2.0 | 99.65 |
| 2.5 | 99.65 |
), ArticleFig(id=1241422276470567743, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表17, caption=
加压碱焙烧时液固比对固定碳含量的影响
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| 液固比/(mL·g-1) | 固定碳含量/% | 备注 |
|---|
| 0.5 | 99.45 | 氢氧化钠溶液浓度40%,压力0.19 MPa(加压温度120 ℃) |
| 1.0 | 99.60 |
| 1.5 | 99.64 |
| 2.0 | 99.65 |
| 2.5 | 99.65 |
), ArticleFig(id=1241422278035043137, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 18, caption=
Effect of HCl concentration in pressure acid leaching on fixed carbon content
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| 盐酸浓度/(mol·L-1) | 固定碳含量/% | 备注 |
|---|
| 1.0 | 99.83 | 酸浸时间120 min,压力0.16 MPa(酸浸温度118 ℃) |
| 1.5 | 99.91 |
| 2.0 | 99.94 |
| 2.5 | 99.95 |
| 3.0 | 99.97 |
| 3.5 | 99.98 |
), ArticleFig(id=1241422278177649474, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表18, caption=
加压酸浸时盐酸浓度对固定碳含量的影响
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| 盐酸浓度/(mol·L-1) | 固定碳含量/% | 备注 |
|---|
| 1.0 | 99.83 | 酸浸时间120 min,压力0.16 MPa(酸浸温度118 ℃) |
| 1.5 | 99.91 |
| 2.0 | 99.94 |
| 2.5 | 99.95 |
| 3.0 | 99.97 |
| 3.5 | 99.98 |
), ArticleFig(id=1241422278269924164, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 19, caption=
Effect of pressure in pressure acid leaching on fixed carbon content
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| 压力/MPa | 固定碳含量/% | 备注 |
|---|
| 0.10 | 99.91 | 酸浸时间120 min,盐酸浓度2.5 mol/L |
| 0.12 | 99.92 |
| 0.14 | 99.94 |
| 0.16 | 99.95 |
| 0.18 | 99.97 |
| 0.20 | 99.98 |
), ArticleFig(id=1241422278391558981, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表19, caption=
加压酸浸时压力对固定碳含量的影响
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| 压力/MPa | 固定碳含量/% | 备注 |
|---|
| 0.10 | 99.91 | 酸浸时间120 min,盐酸浓度2.5 mol/L |
| 0.12 | 99.92 |
| 0.14 | 99.94 |
| 0.16 | 99.95 |
| 0.18 | 99.97 |
| 0.20 | 99.98 |
), ArticleFig(id=1241422278563525446, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=EN, label=Table 20, caption=
Effect of acid leaching time in pressure acid leaching on fixed carbon content
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| 酸浸时间/min | 固定碳含量/% | 备注 |
|---|
| 60 | 99.90 | 盐酸浓度2.5 mol/L,压力0.16 MPa(酸浸温度118 ℃) |
| 90 | 99.96 |
| 120 | 99.96 |
| 150 | 99.97 |
| 180 | 99.98 |
| 210 | 99.98 |
| 240 | 99.98 |
), ArticleFig(id=1241422278668383047, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416387671937882, language=CN, label=表20, caption=
加压酸浸时酸浸时间对固定碳含量的影响
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| 酸浸时间/min | 固定碳含量/% | 备注 |
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| 60 | 99.90 | 盐酸浓度2.5 mol/L,压力0.16 MPa(酸浸温度118 ℃) |
| 90 | 99.96 |
| 120 | 99.96 |
| 150 | 99.97 |
| 180 | 99.98 |
| 210 | 99.98 |
| 240 | 99.98 |
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