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To address issues such as land occupation and environmental hazards caused by stockpiling residues that are left after vanadium extraction from stone-like coal in the Western Hunan, a resource utilization scheme involving deep separation of carbon and ash was proposed. Firstly, coarse-grained minerals with ash content more than 94% were obtained by sieving, and the fine-grained undersize minerals were then subjected to flotation. A closed-circuit flotation test produced a concentrate with fixed carbon content of 32.86% and a higher heating value of 9 832 kJ/kg, which could meet the calorific requirement for the coal added in boilers. The recovery of combustible matter was 73.50%, while the obtained tailings had an ash content of 96.14%, with a yield of 78.42%, and the loss on ignition was 4.98%. The toxicity test confirmed that hazardous components in the high-ash tailings did not exceed limits. Based on preliminary economic estimates, it is concluded that this technical approach is economically feasible.
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针对湘西某石煤酸浸提钒后尾渣堆存占用土地资源、造成巨大环境安全隐患等问题,提出了尾渣深度炭灰分离的资源化利用方案。采用筛分-浮选的方法,通过筛分得到灰分大于94%的粗粒级灰分矿物后,对筛下细粒级矿物进行浮选,闭路浮选所得富炭精矿固定碳含量可达32.86%,高位发热量为9 832 kJ/kg,可满足锅炉掺烧煤的热值要求,可燃体回收率为73.50%;尾矿灰分96.14%,产率78.42%,烧失量为4.98%,浸出毒性检测结果显示高灰分尾矿产品危害成分含量均未超出限值。简单的经济估算结果表明,该技术方案具有一定经济可行性。
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李鑫源(2002—),男,河南南阳人,硕士研究生,主要研究方向为矿产资源综合利用。E-mail:2438384249@qq.com
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李鑫源(2002—),男,河南南阳人,硕士研究生,主要研究方向为矿产资源综合利用。E-mail:2438384249@qq.com
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46(1): 120-130., articleTitle=A research review on beneficiation pre-concentration of vanadium-bearing stone coal, refAbstract=null)], funds=[Fund(id=1241422269558345872, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, awardId=2022JJ30680, language=CN, fundingSource=湖南省自然科学基金(2022JJ30680), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241422252533666188, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, xref=null, ext=[AuthorCompanyExt(id=1241422252537860493, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, companyId=1241422252533666188, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China), AuthorCompanyExt(id=1241422252542054798, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, companyId=1241422252533666188, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中南大学 化学化工学院,湖南 长沙 410083)])], figs=[ArticleFig(id=1241422261463339808, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Fig.1, caption=
XRD pattern of tailings sample after ignition, figureFileSmall=y0loMmzNLzcVZ5jmXPVcVg==, figureFileBig=upMQcYRqmOHTTqvnvjX6yw==, tableContent=null), ArticleFig(id=1241422261622723373, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=图1, caption=
灼烧后尾渣样品XRD衍射图谱, figureFileSmall=y0loMmzNLzcVZ5jmXPVcVg==, figureFileBig=upMQcYRqmOHTTqvnvjX6yw==, tableContent=null), ArticleFig(id=1241422261937296189, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Fig.2, caption=
Flowchart in test, figureFileSmall=56w1ZN1Ifu78uuqDzZSiIw==, figureFileBig=Bio6VbyeeLH3Vh6Jmpm7Pw==, tableContent=null), ArticleFig(id=1241422262075708235, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=图2, caption=
试验流程, figureFileSmall=56w1ZN1Ifu78uuqDzZSiIw==, figureFileBig=Bio6VbyeeLH3Vh6Jmpm7Pw==, tableContent=null), ArticleFig(id=1241422262310589275, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Fig.3, caption=
Flowchart for closed-circuit test, figureFileSmall=CGtfAHgBqd9KalMhhBxNXw==, figureFileBig=8SedlLnBOURz+fVslKSKzQ==, tableContent=null), ArticleFig(id=1241422262461584237, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=图3, caption=
闭路试验流程, figureFileSmall=CGtfAHgBqd9KalMhhBxNXw==, figureFileBig=8SedlLnBOURz+fVslKSKzQ==, tableContent=null), ArticleFig(id=1241422262650327929, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Fig.4, caption=
Relationship between fixed carbon content and calorific value of carbon-rich concentrate, figureFileSmall=gIqCSr63C+rMEnJy8GWbNw==, figureFileBig=I4A1XwG//1UXms9DwJsNYQ==, tableContent=null), ArticleFig(id=1241422262830683017, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=图4, caption=
富炭精矿产品固定碳含量与热值的关系, figureFileSmall=gIqCSr63C+rMEnJy8GWbNw==, figureFileBig=I4A1XwG//1UXms9DwJsNYQ==, tableContent=null), ArticleFig(id=1241422262981677972, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 1, caption=
Industrial analysis results of tailings from acid extraction of vanadium from stone-like coal
, figureFileSmall=null, figureFileBig=null, tableContent=
| 含量(质量分数)/% | 热值/(kJ·kg-1) |
|---|
| 固定碳 | 挥发分 | 灰分 | 全水 | 全硫 | 高位 | 低位 |
|---|
| 7.98 | 2.28 | 88.67 | 1.07 | 7.43 | 3 251 | 3 046 |
), ArticleFig(id=1241422264617456541, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表1, caption=
石煤钒矿酸浸提钒尾渣全工业分析结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 含量(质量分数)/% | 热值/(kJ·kg-1) |
|---|
| 固定碳 | 挥发分 | 灰分 | 全水 | 全硫 | 高位 | 低位 |
|---|
| 7.98 | 2.28 | 88.67 | 1.07 | 7.43 | 3 251 | 3 046 |
), ArticleFig(id=1241422264822977450, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 2, caption=
XRF analysis of tailings sample after ignition
, figureFileSmall=null, figureFileBig=null, tableContent=
| O | Si | S | Ca | Fe | Al | Ba | K | Mg |
| 53.84 | 34.00 | 7.616 | 4.883 | 1.233 | 0.665 | 0.520 | 0.300 | 0.214 |
| P | V | Na | Zn | Ti | Ni | Cu | Mn | |
| 0.214 | 0.116 | 0.091 | 0.079 | 0.071 | 0.032 | 0.026 | 0.023 | |
), ArticleFig(id=1241422264961389493, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表2, caption=
灼烧后尾渣样品XRF元素分析结果(质量分数)
, figureFileSmall=null, figureFileBig=null, tableContent=
| O | Si | S | Ca | Fe | Al | Ba | K | Mg |
| 53.84 | 34.00 | 7.616 | 4.883 | 1.233 | 0.665 | 0.520 | 0.300 | 0.214 |
| P | V | Na | Zn | Ti | Ni | Cu | Mn | |
| 0.214 | 0.116 | 0.091 | 0.079 | 0.071 | 0.032 | 0.026 | 0.023 | |
), ArticleFig(id=1241422265091412929, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 3, caption=
Sieve analysis results of tailings after acid leaching of vanadium from stone-like coal
, figureFileSmall=null, figureFileBig=null, tableContent=
| 粒级/mm | 产率/% | 灰分/% | 累计产率/% | 累计灰分/% |
|---|
| -0.420+0.100 | 13.75 | 94.01 | 13.75 | 94.01 |
| -0.100+0.074 | 6.56 | 91.57 | 20.31 | 93.22 |
| -0.074+0.048 | 11.34 | 91.38 | 31.65 | 92.56 |
| -0.048+0.038 | 8.60 | 89.27 | 40.25 | 91.86 |
| -0.038 | 59.75 | 88.52 | 100.00 | 89.86 |
| 合计 | 100.00 | 89.86 | | |
), ArticleFig(id=1241422265179493323, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表3, caption=
石煤钒矿酸浸提钒尾渣筛析结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 粒级/mm | 产率/% | 灰分/% | 累计产率/% | 累计灰分/% |
|---|
| -0.420+0.100 | 13.75 | 94.01 | 13.75 | 94.01 |
| -0.100+0.074 | 6.56 | 91.57 | 20.31 | 93.22 |
| -0.074+0.048 | 11.34 | 91.38 | 31.65 | 92.56 |
| -0.048+0.038 | 8.60 | 89.27 | 40.25 | 91.86 |
| -0.038 | 59.75 | 88.52 | 100.00 | 89.86 |
| 合计 | 100.00 | 89.86 | | |
), ArticleFig(id=1241422265435345879, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 4, caption=
Influence of pulp pH on flotation results
, figureFileSmall=null, figureFileBig=null, tableContent=
| pH值 | 可燃体回收率/% | 富炭精矿固定碳含量/% | 尾矿产率/% | 尾矿灰分/% |
|---|
| 3.0 | 30.63 | 30.05 | 53.98 | 92.25 |
| 4.0 | 30.12 | 31.82 | 53.16 | 92.53 |
| 5.0 | 29.66 | 29.89 | 54.33 | 92.14 |
| 6.0 | 24.35 | 28.06 | 55.68 | 91.65 |
| 7.0 | 22.09 | 25.62 | 62.33 | 90.94 |
), ArticleFig(id=1241422265577952228, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表4, caption=
矿浆pH值对浮选效果的影响
, figureFileSmall=null, figureFileBig=null, tableContent=
| pH值 | 可燃体回收率/% | 富炭精矿固定碳含量/% | 尾矿产率/% | 尾矿灰分/% |
|---|
| 3.0 | 30.63 | 30.05 | 53.98 | 92.25 |
| 4.0 | 30.12 | 31.82 | 53.16 | 92.53 |
| 5.0 | 29.66 | 29.89 | 54.33 | 92.14 |
| 6.0 | 24.35 | 28.06 | 55.68 | 91.65 |
| 7.0 | 22.09 | 25.62 | 62.33 | 90.94 |
), ArticleFig(id=1241422265917690861, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 5, caption=
Influence of collector types on flotation results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 捕收剂种类 | 可燃体回收率/% | 富炭精矿固定碳含量/% | 尾矿产率/% | 尾矿灰分/% |
|---|
| 煤油 | 40.56 | 27.69 | 49.97 | 93.53 |
| 柴油 | 35.62 | 30.21 | 54.89 | 92.89 |
| V401 | 55.90 | 35.35 | 46.45 | 95.03 |
), ArticleFig(id=1241422266081268734, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表5, caption=
捕收剂种类对浮选效果的影响
, figureFileSmall=null, figureFileBig=null, tableContent=
| 捕收剂种类 | 可燃体回收率/% | 富炭精矿固定碳含量/% | 尾矿产率/% | 尾矿灰分/% |
|---|
| 煤油 | 40.56 | 27.69 | 49.97 | 93.53 |
| 柴油 | 35.62 | 30.21 | 54.89 | 92.89 |
| V401 | 55.90 | 35.35 | 46.45 | 95.03 |
), ArticleFig(id=1241422266207096836, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 6, caption=
Influence of collector dosage on flotation results
, figureFileSmall=null, figureFileBig=null, tableContent=
| V401用量/(g·t-1) | 可燃体回收率/% | 富炭精矿固定碳含量/% | 尾矿产率/% | 尾矿灰分/% |
|---|
| 500 | 45.95 | 38.87 | 50.92 | 93.96 |
| 600 | 50.98 | 36.79 | 48.61 | 94.35 |
| 700 | 55.90 | 35.35 | 46.65 | 95.03 |
| 800 | 59.67 | 34.64 | 44.98 | 95.29 |
| 900 | 61.08 | 31.69 | 40.29 | 95.38 |
| 1 000 | 62.78 | 28.20 | 37.29 | 95.43 |
), ArticleFig(id=1241422266332925967, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表6, caption=
V401用量对浮选效果的影响
, figureFileSmall=null, figureFileBig=null, tableContent=
| V401用量/(g·t-1) | 可燃体回收率/% | 富炭精矿固定碳含量/% | 尾矿产率/% | 尾矿灰分/% |
|---|
| 500 | 45.95 | 38.87 | 50.92 | 93.96 |
| 600 | 50.98 | 36.79 | 48.61 | 94.35 |
| 700 | 55.90 | 35.35 | 46.65 | 95.03 |
| 800 | 59.67 | 34.64 | 44.98 | 95.29 |
| 900 | 61.08 | 31.69 | 40.29 | 95.38 |
| 1 000 | 62.78 | 28.20 | 37.29 | 95.43 |
), ArticleFig(id=1241422266433589272, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 7, caption=
Influence of inhibitor types on flotation results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 抑制剂种类 | 可燃体回收率/% | 富炭精矿固定碳含量/% | 尾矿产率/% | 尾矿灰分/% |
|---|
| 水玻璃 | 59.67 | 34.64 | 44.98 | 95.29 |
| P601 | 64.68 | 33.89 | 43.83 | 96.59 |
), ArticleFig(id=1241422266563612702, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表7, caption=
抑制剂种类对浮选效果的影响
, figureFileSmall=null, figureFileBig=null, tableContent=
| 抑制剂种类 | 可燃体回收率/% | 富炭精矿固定碳含量/% | 尾矿产率/% | 尾矿灰分/% |
|---|
| 水玻璃 | 59.67 | 34.64 | 44.98 | 95.29 |
| P601 | 64.68 | 33.89 | 43.83 | 96.59 |
), ArticleFig(id=1241422266647498789, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 8, caption=
Closed-circuit test results
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| 产品名称 | 产率/% | 灰分/% | 固定碳含量/% | 可燃体回收率/% |
|---|
| 精煤 | 21.58 | 61.14 | 32.86 | 73.50 |
| 高灰分尾矿 | 12.98 | 94.16 | 1.52 | 6.64 |
| 浮选尾矿 | 65.44 | 96.53 | 1.06 | 19.90 |
| 给矿 | 100.00 | 88.59 | 7.98 | 100.00 |
), ArticleFig(id=1241422266790105135, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表8, caption=
闭路试验结果
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| 产品名称 | 产率/% | 灰分/% | 固定碳含量/% | 可燃体回收率/% |
|---|
| 精煤 | 21.58 | 61.14 | 32.86 | 73.50 |
| 高灰分尾矿 | 12.98 | 94.16 | 1.52 | 6.64 |
| 浮选尾矿 | 65.44 | 96.53 | 1.06 | 19.90 |
| 给矿 | 100.00 | 88.59 | 7.98 | 100.00 |
), ArticleFig(id=1241422266890768437, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 9, caption=
Industrial analysis results of flotation concentrate
, figureFileSmall=null, figureFileBig=null, tableContent=
| 含量(质量分数)/% | 热值/(kJ·kg-1) |
|---|
| 固定碳 | 挥发分 | 灰分 | 全水 | 全硫 | 高位 | 低位 |
|---|
| 32.86 | 3.92 | 61.11 | 2.11 | 0.80 | 9 832 | 9 263 |
), ArticleFig(id=1241422266983043134, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表9, caption=
浮选精矿全工业分析结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 含量(质量分数)/% | 热值/(kJ·kg-1) |
|---|
| 固定碳 | 挥发分 | 灰分 | 全水 | 全硫 | 高位 | 低位 |
|---|
| 32.86 | 3.92 | 61.11 | 2.11 | 0.80 | 9 832 | 9 263 |
), ArticleFig(id=1241422267129843785, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 10, caption=
Toxicity test results of leaching tailings
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| 检验项目 | 检验结果/(mg·L-1) | 浸出液中危害成分限值/(mg·L-1) |
|---|
| 铜(以总铜计) | 1.13 | 100 |
| 锌(以总锌计) | 5.30 | 100 |
| 铬(以总铬计) | 0.17 | 1 |
| 铅(以总铅计) | 0.039 | 5 |
| 铍(以总铍计) | <0.001 | 0.02 |
| 钡(以总钡计) | 0.20 | 100 |
| 砷(以总砷计) | 0.24 | 5 |
| 硒(以总硒计) | 0.071 | 1 |
| 镍(以总镍计) | 1.54 | 5 |
| 汞(以总汞计) | 0.000 13 | 0.1 |
| 氰化物(以CN-计) | <0.000 01 | 5 |
| 无机氟化物(除氟化钙外) | 3.80 | 100 |
), ArticleFig(id=1241422267243089998, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表10, caption=
尾矿浸出毒性检测结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 检验项目 | 检验结果/(mg·L-1) | 浸出液中危害成分限值/(mg·L-1) |
|---|
| 铜(以总铜计) | 1.13 | 100 |
| 锌(以总锌计) | 5.30 | 100 |
| 铬(以总铬计) | 0.17 | 1 |
| 铅(以总铅计) | 0.039 | 5 |
| 铍(以总铍计) | <0.001 | 0.02 |
| 钡(以总钡计) | 0.20 | 100 |
| 砷(以总砷计) | 0.24 | 5 |
| 硒(以总硒计) | 0.071 | 1 |
| 镍(以总镍计) | 1.54 | 5 |
| 汞(以总汞计) | 0.000 13 | 0.1 |
| 氰化物(以CN-计) | <0.000 01 | 5 |
| 无机氟化物(除氟化钙外) | 3.80 | 100 |
), ArticleFig(id=1241422267394084951, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 11, caption=
Cost estimate of treating vanadium extraction tailings
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| 名称 | 耗量/(kg·t-1) | 成本/(元·t-1) | 备注 |
|---|
| 捕收剂 | 0.93 | 11.16 | 工业级纯度约12 000元/t |
| 起泡剂 | 0.08 | 0.92 | 工业级纯度约11 500元/t |
| 调整剂 | 0.20 | 1.60 | 工业级纯度约8 000元/t |
| 抑制剂 | 1.40 | 6.72 | 工业级纯度约4 800元/t |
| 能耗 | — | 63.00 | 热能按50元/t计,电费按0.8元/度计 |
| 设备 | — | 24.00 | 按24 000万元固定资产(年处理量30万t)10年折旧无残值 |
| 修理费 | — | 12.00 | 按折旧费的50% |
| 合计 | | 119.40 | |
), ArticleFig(id=1241422267515719776, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表11, caption=
每吨提钒尾渣处理成本估算
, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 | 耗量/(kg·t-1) | 成本/(元·t-1) | 备注 |
|---|
| 捕收剂 | 0.93 | 11.16 | 工业级纯度约12 000元/t |
| 起泡剂 | 0.08 | 0.92 | 工业级纯度约11 500元/t |
| 调整剂 | 0.20 | 1.60 | 工业级纯度约8 000元/t |
| 抑制剂 | 1.40 | 6.72 | 工业级纯度约4 800元/t |
| 能耗 | — | 63.00 | 热能按50元/t计,电费按0.8元/度计 |
| 设备 | — | 24.00 | 按24 000万元固定资产(年处理量30万t)10年折旧无残值 |
| 修理费 | — | 12.00 | 按折旧费的50% |
| 合计 | | 119.40 | |
), ArticleFig(id=1241422269101166699, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=EN, label=Table 12, caption=
Estimate of revenue and profit for products from vanadium extraction tailings
, figureFileSmall=null, figureFileBig=null, tableContent=
| 产品名称 | 产量/t | 产品单价/(元·t-1) | 产品价值/(元·t-1) | 备注 |
|---|
| 富炭精矿 | 0.215 8 | 60 | 12.85 | 热值约9 832 kJ/kg |
| 高灰分尾矿 | 0.784 2 | 150 | 117.63 | 烧失量小于5% |
| 尾矿堆存成本所节约的 | — | — | 80.00 | 按尾矿库占地面积、维护管理成本折算 |
| 合计 | | | 210.48 | |
), ArticleFig(id=1241422269256355958, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416384253587790, language=CN, label=表12, caption=
每吨提钒尾渣产品收入及利润估算
, figureFileSmall=null, figureFileBig=null, tableContent=
| 产品名称 | 产量/t | 产品单价/(元·t-1) | 产品价值/(元·t-1) | 备注 |
|---|
| 富炭精矿 | 0.215 8 | 60 | 12.85 | 热值约9 832 kJ/kg |
| 高灰分尾矿 | 0.784 2 | 150 | 117.63 | 烧失量小于5% |
| 尾矿堆存成本所节约的 | — | — | 80.00 | 按尾矿库占地面积、维护管理成本折算 |
| 合计 | | | 210.48 | |
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