CN109593969A - 一种无氰溶金工艺 - Google Patents
一种无氰溶金工艺 Download PDFInfo
- Publication number
- CN109593969A CN109593969A CN201811534973.8A CN201811534973A CN109593969A CN 109593969 A CN109593969 A CN 109593969A CN 201811534973 A CN201811534973 A CN 201811534973A CN 109593969 A CN109593969 A CN 109593969A
- Authority
- CN
- China
- Prior art keywords
- gold
- acid
- cyanogen
- leaching
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 54
- 239000010931 gold Substances 0.000 title claims abstract description 54
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000002386 leaching Methods 0.000 claims abstract description 41
- 239000002253 acid Substances 0.000 claims abstract description 30
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 22
- 238000005406 washing Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011780 sodium chloride Substances 0.000 claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- 239000000706 filtrate Substances 0.000 claims abstract description 10
- 239000006210 lotion Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000002910 solid waste Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000000284 extract Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 230000001180 sulfating effect Effects 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 3
- XEIPQVVAVOUIOP-UHFFFAOYSA-N [Au]=S Chemical compound [Au]=S XEIPQVVAVOUIOP-UHFFFAOYSA-N 0.000 claims 1
- 239000012141 concentrate Substances 0.000 claims 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000006184 cosolvent Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- -1 alkali metal cyanide Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011026 diafiltration Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- PQTCMBYFWMFIGM-UHFFFAOYSA-N gold silver Chemical compound [Ag].[Au] PQTCMBYFWMFIGM-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000002825 nitriles Chemical group 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/10—Hydrochloric acid, other halogenated acids or salts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明提供一种无氰溶金工艺,以酸浸渣为原料,取酸浸渣分散于水中,先加入酸,酸的添加量以H+浓度计为1~2 mol/L,0.5小时以后再加入NaCl和氯酸钠,NaCl的添加量为100~250g/L,氯酸钠的加入量为10~20g/L,搅拌浸出4~16小时后,过滤并收集滤液,所得滤渣用水洗涤至中性并收集洗液,所得滤液和洗液混合即为贵液,贵液用于提金,洗涤后的滤渣符合一般固废标准。本发明无需使用氰化物,彻底解决了传统的氰化法浸出金所带来的环境污染难题。
Description
技术领域
本发明属于金矿提取技术领域,具体涉及一种无氰溶金工艺。
背景技术
氰化法是以碱金属氰化物的水溶液作溶剂,浸出金、银矿石中的金、银,然后从含金、银的溶液中提取金、银的方法。以氰化法浸出金为例,在稀薄的氰化溶液中,并有氧(或氧化剂)存在的条件下,含金矿石中的金与氰化物反应生成一价金的络合物而溶解进入溶液中,得到浸出液,以氰化钾为例,反应式为:
4Au+8KCN+2H2O→4KAu(CN)2+4KOH
氰化浸出金的工艺方法有槽浸氰化法和堆浸氰化法两类。槽浸氰化法是传统的浸金方法,又分渗滤氰化法和搅拌氰化法两种;堆浸法是近20年来才出现的新技术,主要用于处理低品位氧化矿。自1887发现氰化液可以溶金以来,氰化法浸出至今已有近百年的生产实践,工艺比较成熟,回收率高,对矿石适应性强,能就地产金,所以至今仍是黄金浸出生产的主要方法。
但是随着国家对环保要求的逐渐加强,氰化法浸金生产企业面临严峻的生存形势,其含氰废液和含氰尾渣的处理一直是黄金生产企业难以逾越的难题,国内一些企业虽然采取了相应的处理措施,但结果难以令人满意,也是治标不治本,并不符合国家环保的绿色排放要求。要彻底解决问题必须从根本上进行技术创新,寻找氰化法浸出金的替代工艺,彻底消除氰化尾渣污染问题。
发明内容
本发明针对现有技术中氰化尾渣污染问题无法达到国家环保要求,提供一种无氰溶金工艺,无需使用氰化物,彻底解决了传统的氰化法浸出金所带来的环境污染难题。
本发明采用如下技术方案:
一种无氰溶金工艺,以酸浸渣为原料,取酸浸渣分散于水中,水(单位为L)与酸浸渣(单位为g)的液固比为2~5:1,先加入酸,酸的添加量以H+浓度计为1~2 mol/L,0.5小时以后再加入NaCl和氯酸钠,NaCl的添加量为100~250g/L,氯酸钠的加入量为10~20g/L,搅拌浸出4~16小时后,过滤并收集滤液,所得滤渣用水洗涤至中性并收集洗液,所得滤液和洗液混合即为贵液,贵液用于提金,洗涤后的滤渣符合一般固废标准;该无氰溶金工艺在常温下进行即可。
优选地,所述贵液可采用二氧化硫还原法和活性炭吸附法提取金。
优选地,所述加入的酸为硫酸或盐酸。
优选地,所述酸浸渣为采用硫酸化焙烧含硫金精矿的方式提取黄金而产生的尾渣。
本发明的有益效果如下:
无氰溶金是由一种酸性介质、溶金剂和助溶剂组成,在酸性介质中可以更有效的打开杂质对金银的包裹,然后溶金剂(氯酸钠)在助溶剂(氯化钠)的帮助下实现快速溶解酸浸渣中金和银的反应,其具有浸出时间短,浸出率高、无污染的特点,金浸出率高达99%,比氰化浸出金浸出率提高约4个百分点,银的浸出率提高约10个百分点。且溶金尾液可全部循环使用(需额外加入溶金剂),浸出废渣为一般固废,生产过程无有害气体产生,所用药剂无毒无害。无氰溶金彻底解决了传统的氰化浸金所带来的一系列难题,是取代氰化浸出提金的最佳选择。
具体实施方式
为了使本发明的技术目的、技术方案和有益效果更加清楚,下面结合具体实施例对本发明的技术方案作出进一步的说明。
实施例1
一种无氰溶金工艺,以酸浸渣为原料,所述酸浸渣为采用硫酸化焙烧含硫金精矿的方式提取黄金而产生的尾渣。取酸浸渣分散于水中,水与酸浸渣的液固比为3:1,先加入硫酸,酸的添加量以H+浓度计为1 mol/L,0.5小时以后再加入NaCl和氯酸钠,NaCl的添加量为100g/L,氯酸钠的加入量为10g/L,搅拌浸出4小时后,过滤并收集滤液,所得滤渣用水洗涤至中性并收集洗液,洗涤后的滤渣符合一般固废标准,所得滤液和洗液混合即为贵液,所述贵液可采用二氧化硫还原法和活性炭吸附法提取金。经检测,酸浸渣原料的金品位66g/t,而经本发明处理后的尾渣(即滤渣)金品位0.70g/t。
实施例2
一种无氰溶金工艺,以酸浸渣为原料,所述酸浸渣为采用硫酸化焙烧含硫金精矿的方式提取黄金而产生的尾渣。取酸浸渣分散于水中,酸浸渣与水的液固比为5:1,先加入盐酸,酸的添加量以H+浓度计为2 mol/L,1小时以后再加入NaCl和氯酸钠,NaCl的添加量为250g/L,氯酸钠的加入量为20g/L,搅拌浸出16小时后,过滤并收集滤液,所得滤渣用水洗涤至中性并收集洗液,洗涤后的滤渣符合一般固废标准,所得滤液和洗液混合即为贵液,所述贵液可采用二氧化硫还原法和活性炭吸附法提取金。经检测,酸浸渣原料的金品位72g/t,而经本发明处理后的尾渣(即滤渣)金品位0.50g/t。
最后所应说明的是:上述实施例仅用于说明而非限制本发明的技术方案,任何对本发明进行的等同替换及不脱离本发明精神和范围的修改或局部替换,其均应涵盖在本发明权利要求保护的范围之内。
Claims (4)
1.一种无氰溶金工艺,以酸浸渣为原料,其特征在于:取酸浸渣分散于水中,先加入酸,酸的添加量以H+浓度计为1~2 mol/L,0.5小时以后再加入NaCl和氯酸钠,NaCl的添加量为100~250g/L,氯酸钠的加入量为10~20g/L,搅拌浸出4~16小时后,过滤并收集滤液,所得滤渣用水洗涤至中性并收集洗液,所得滤液和洗液混合即为贵液,贵液用于提金,洗涤后的滤渣符合一般固废标准。
2.根据权利要求1所述的无氰溶金工艺,其特征在于:所述贵液可采用二氧化硫还原法和活性炭吸附法提取金。
3.根据权利要求1所述的无氰溶金工艺,其特征在于:所述加入的酸为硫酸或盐酸。
4.根据权利要求1所述的无氰溶金工艺,其特征在于:所述酸浸渣为采用硫酸化焙烧含硫金精矿的方式提取黄金而产生的尾渣。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811534973.8A CN109593969A (zh) | 2018-12-14 | 2018-12-14 | 一种无氰溶金工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811534973.8A CN109593969A (zh) | 2018-12-14 | 2018-12-14 | 一种无氰溶金工艺 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN109593969A true CN109593969A (zh) | 2019-04-09 |
Family
ID=65961932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811534973.8A Pending CN109593969A (zh) | 2018-12-14 | 2018-12-14 | 一种无氰溶金工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN109593969A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115449626A (zh) * | 2022-09-14 | 2022-12-09 | 海南行者新材料科技有限公司 | 一种利用微波处理含硫金矿粉的方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1119678A (zh) * | 1994-05-10 | 1996-04-03 | 陕西深华金属材料研究所 | 从铅阳极泥中回收银、金、锑、铜、铅的方法 |
CN1253184A (zh) * | 1999-11-11 | 2000-05-17 | 聂如林 | 从含金物中无氰浸提金的方法 |
CN1268580A (zh) * | 2000-01-11 | 2000-10-04 | 韩英东 | 贵金属熔炼渣湿法冶金工艺 |
CN102168176A (zh) * | 2011-03-10 | 2011-08-31 | 田文学 | 焙烧——氰化含金尾渣中有价金属综合回收工艺 |
CN103305699A (zh) * | 2013-06-20 | 2013-09-18 | 山东恒邦冶炼股份有限公司 | 一种从铜阳极泥中提取铂钯的方法 |
CN105219950A (zh) * | 2014-06-17 | 2016-01-06 | 武汉理工大学 | 一种硫酸渣提金焙烧预处理方法 |
CN105821215A (zh) * | 2016-04-19 | 2016-08-03 | 浙江亚栋实业有限公司 | 一种从阳极泥中回收金属铋的方法 |
-
2018
- 2018-12-14 CN CN201811534973.8A patent/CN109593969A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1119678A (zh) * | 1994-05-10 | 1996-04-03 | 陕西深华金属材料研究所 | 从铅阳极泥中回收银、金、锑、铜、铅的方法 |
CN1253184A (zh) * | 1999-11-11 | 2000-05-17 | 聂如林 | 从含金物中无氰浸提金的方法 |
CN1268580A (zh) * | 2000-01-11 | 2000-10-04 | 韩英东 | 贵金属熔炼渣湿法冶金工艺 |
CN102168176A (zh) * | 2011-03-10 | 2011-08-31 | 田文学 | 焙烧——氰化含金尾渣中有价金属综合回收工艺 |
CN103305699A (zh) * | 2013-06-20 | 2013-09-18 | 山东恒邦冶炼股份有限公司 | 一种从铜阳极泥中提取铂钯的方法 |
CN105219950A (zh) * | 2014-06-17 | 2016-01-06 | 武汉理工大学 | 一种硫酸渣提金焙烧预处理方法 |
CN105821215A (zh) * | 2016-04-19 | 2016-08-03 | 浙江亚栋实业有限公司 | 一种从阳极泥中回收金属铋的方法 |
Non-Patent Citations (3)
Title |
---|
《黄金冶金新技术》: "《黄金冶金新技术》", 31 July 2018, 北京:冶金工业出版社 * |
《黄金矿山实用手册》编写组编: "《黄金矿山实用手册》", 31 December 1990, 中国工人出版社 * |
谢建宏等主编: "《黄金选冶》", 31 July 2014, 北京:冶金工业出版社 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115449626A (zh) * | 2022-09-14 | 2022-12-09 | 海南行者新材料科技有限公司 | 一种利用微波处理含硫金矿粉的方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107058731B (zh) | 一种以铂钯精矿为原料生产铂钯产品的工艺 | |
US7479262B2 (en) | Method for separating platinum group element | |
CN107460324B (zh) | 一种银阳极泥控电位制备四九金的方法 | |
CN105063354A (zh) | 一种含砷、含锑难处理金矿的梯级回收方法 | |
CN103114202B (zh) | 环境友好型难浸金银矿多金属综合回收工艺 | |
CN104445101B (zh) | 一种从碲化铜渣中提取铜和碲的方法 | |
CN101818258A (zh) | 一种混合浸出剂快速浸出金银的方法 | |
CN102363839A (zh) | 从含银烟灰的综合回收银、铅和铋的工艺 | |
CN110184454A (zh) | 提金药剂及采用该提金药剂的提金工艺 | |
CN107435102B (zh) | 一种非氰浸出剂及其用于金矿浸出的方法 | |
CN111270071A (zh) | 一种从含金贵液中回收金的方法 | |
RO126480B1 (ro) | Procedeu de obţinere a aurului şi argintului | |
CN106048233A (zh) | 一种银的浸出方法 | |
MXPA04010238A (es) | Metodo para la recuperacion de oro. | |
CA1107077A (en) | Extraction of gold and silver | |
CN105967153A (zh) | 一种从高碲渣料中回收碲的工艺 | |
CN108950202B (zh) | 一种从酸性硫脲浸金液中回收金的方法 | |
CN109593969A (zh) | 一种无氰溶金工艺 | |
CN109881022A (zh) | 一种含氰贫液全流程绿色循环利用的方法 | |
CN108034825B (zh) | 湿法从阳极泥中提取金银的方法 | |
Kulandaisamy et al. | The aqueous recovery of gold from electronic scrap | |
CN110684902B (zh) | 一种高铝石油催化剂银捕集提取贵金属的工艺 | |
CN106498178B (zh) | 一种回收载金粉炭中金的方法 | |
CN109402392B (zh) | 一种从铜阳极泥中提取碲的方法 | |
CN109055764B (zh) | 一种高氯低锌物料的综合回收方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190409 |
|
RJ01 | Rejection of invention patent application after publication |