CN101760625A - Preroasting and hydrometallurgy process for cyaniding and replacing gold mud - Google Patents
Preroasting and hydrometallurgy process for cyaniding and replacing gold mud Download PDFInfo
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- CN101760625A CN101760625A CN201010030127A CN201010030127A CN101760625A CN 101760625 A CN101760625 A CN 101760625A CN 201010030127 A CN201010030127 A CN 201010030127A CN 201010030127 A CN201010030127 A CN 201010030127A CN 101760625 A CN101760625 A CN 101760625A
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Abstract
The invention belongs to the field of metallurgical process of cyaniding and replacing gold mud and in particular discloses a preroasting and hydrometallurgy process for the cyaniding and replacing gold mud. The process comprises the steps of roasting the cyaniding and replacing gold mud according to the following set temperature procedure and continuously stirring the gold mud to prevent the cyaniding and replacing gold mud from agglomerating in the whole roasting process, wherein a temperature set initially is between 300 and 400 DEG C and the roasting time is between 1 and 1.5 hour, a temperature set secondly is between 400 and 600 DEG C and the roasting time is between 1 and 1.5 hour, and a temperature set thirdly is between 650 and 750 DEG C; roasting the gold mud till the color becomes offwhite; naturally cooling the gold mud to complete the roasting; adding water into the preroasted gold mud till the gold mud is submerged; and sending the gold mud for acid pickling and continuous hydrometallurgy. Through the temperature setting, impurities of the gold mud are removed on different temperature sections; the impurities in the roasted gold mud are obviously reduced; the melting time is reduced; the cost is reduced; 95 percent of the gold mud can meet the requirement of international 2# gold; the purification expense is reduced; energy is saved; and consumption is reduced.
Description
Technical field
The invention belongs to the metallurgical technology field of cyaniding and replacing gold mud, be specifically related to a kind of preroasting and hydrometallurgical processes of cyaniding and replacing gold mud.
Background technology
The hydrometallurgical processes flow process of existing cyaniding and replacing gold mud is as shown in drawings: to the gold mud from the cyanide gold-leaching system, at first utilize nitric acid to carry out the acidleach removal of impurities, then residue is soaked slag and carry out the molten gold of chloroazotic acid, make gold enter solution, contain golden chloroazotic acid through after steaming acid, catching up with nitre, feed liquid SO again
2, make liquid Au
3+Be reduced into the process of simple substance Au powder.Liquid caustic soda size mixing (pH) is adopted in the cyanide gold-leaching post before this, after use the carbon ammonium instead and size mixing, impurity was big when impurity was sized mixing than liquid caustic soda in the gold mud that produces, but the but not easy-to-use existing hydrometallurgical processes of impurities is removed, and during acidleach, nitric acid dosage is big, filtration difficulty, the generation quantity of slag are big, part finished product gold can not reach GB 2
#The standard of gold, thus purification costs increased.
Summary of the invention
For overcoming the deficiencies in the prior art part, purpose of the present invention aims to provide a kind of preroasting and hydrometallurgical processes of cyaniding and replacing gold mud.
For achieving the above object, the technical scheme taked of the present invention is as follows:
A kind of preroasting technology of cyaniding and replacing gold mud: by the roasting of following design temperature program, whole roasting process constantly stirs gold mud and prevents the gold mud caking with the cyaniding and replacing gold mud: first 300～400 ℃ of roasting 1～1.5h of design temperature make CN
-, moisture, alkali and part zinc removes; 400～600 ℃ of roasting 1～1.5h of secondary design temperature remove other impurity such as a large amount of zinc powders; 650～750 ℃ of roastings of three design temperatures to gold mud color becomes canescence, makes impurity high temperature oxidations such as part zinc, lead, mercury, naturally cooling after three roastings, and roasting is promptly finished.
Three design temperature roasting stages, utilize conventional spray technology to reclaim impurity mercury.
A kind of hydrometallurgical processes of cyaniding and replacing gold mud at first adds nitric acid and carries out the acidleach removal of impurities in the cyaniding and replacing gold mud, then residue is soaked slag and carry out the molten gold of chloroazotic acid, makes gold enter solution, contains golden chloroazotic acid through after steaming acid, catching up with nitre, feeds liquid SO again
2, make liquid Au
3+Be reduced into simple substance Au powder, its special feature is that the cyaniding and replacing gold mud carries out preroasting before acidleach, described preroasting is by the roasting of following design temperature program, and whole roasting process constantly stirs gold mud and prevents the gold mud caking: first 300～400 ℃ of roasting 1～1.5h of design temperature make CN
-, moisture, alkali and part zinc removes; 400～600 ℃ of roasting 1～1.5h of secondary design temperature remove other impurity such as a large amount of zinc powders; 650～750 ℃ of roastings of three design temperatures to gold mud color becomes canescence, make impurity high temperature oxidations such as part zinc, lead, mercury, naturally cooling after three roastings, gold mud causes precious metal to run off because of dry emerging when avoiding feeding intake, in gold mud, add water to and flood gold mud, send to acidleach.
In gold mud, add water after naturally cooling to 100～200 ℃.
Three design temperature roasting stages, utilize conventional spray technology to reclaim impurity mercury.
Sinter process key problem in technology part of the present invention is design temperature, and temperature rise rate is not had special requirement.Utilize " ZL200920088042.X " disclosed spray equipment and principle to reclaim impurity mercury.
Roasting of the present invention is by design temperature, removes impurity in the gold mud in the differing temps section:
(1) transition removal of impurities behind zinc, the plumbous high temperature;
(2) remove CN in the gold mud
-, base number, nitric acid consumption when reducing acidleach;
(3) utilize roasting can reclaim valuable metal mercury in the gold mud.
Compare with existing hydrometallurgical processes, the beneficial effect of hydrometallurgical processes of the present invention is: the gold mud impurity that roasting goes out obviously reduces, and reduce tap to tap time, and cost reduces, and 95% can reach GB 2# gold, and purification costs reduces, and is energy-saving and cost-reducing.
Description of drawings
Accompanying drawing is the hydrometallurgical processes schema of existing cyaniding and replacing gold mud.
Embodiment
The invention will be further described below in conjunction with embodiment, and listed embodiment is being to implement under the prerequisite with the technical solution of the present invention all, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Resistance furnace: the grand industry limited liability company that starts construction in Zhengzhou, model: LX3-45-9
To be divided into four parts with a collection of cyaniding and replacing gold mud, every part 200kg, be labeled as cyaniding and replacing gold mud 0, cyaniding and replacing gold mud 1, cyaniding and replacing gold mud 2, cyaniding and replacing gold mud 3 respectively, wherein cyaniding and replacing gold mud 0 is a reference examples, and cyaniding and replacing gold mud 1, cyaniding and replacing gold mud 2, cyaniding and replacing gold mud 3 are the test example.
Cyaniding and replacing gold mud 0 hydrometallurgy: by existing cyaniding and replacing gold mud hydrometallurgy common process shown in the drawings, in cyaniding and replacing gold mud 0, add nitric acid and carry out the acidleach removal of impurities, then residue is soaked slag and carry out the molten gold of chloroazotic acid, make gold enter solution, contain golden chloroazotic acid through after steaming acid, catching up with nitre, feed liquid SO again
2, make liquid Au
3+Be reduced into simple substance Au powder.
Cyaniding and replacing gold mud 1 preroasting: cyaniding and replacing gold mud 1 is evenly packed in the titanium groove, after dividing equally, make gold mud uniform distribution in the titanium groove, stir when being beneficial to roasting, observe bottom roasting situation (whether grilling thoroughly with roasting even), improve roasting effect, the titanium groove is placed in the resistance furnace then by the roasting of following design temperature program, whole roasting process constantly stirs gold mud and prevents the gold mud caking: first 350 ℃ of roasting 1.3h of design temperature, 600 ℃ of roasting 1h of secondary design temperature, 750 ℃ of roastings of three design temperatures become ash to the gold mud color, and naturally cooling gets final product, at this temperature section, utilize conventional spray technology to reclaim impurity mercury.In the whole roasting process behind the design temperature resistance furnace heat up automatically.
Cyaniding and replacing gold mud 1 hydrometallurgy: will naturally cool to 150 ℃ through the cyaniding and replacing gold mud 1 of above-mentioned preroasting, and add water logging not to gold mud, taking-up feeds intake, according to cyaniding and replacing gold mud 0 hydrometallurgy same process metallurgy.
Cyaniding and replacing gold mud 0 and cyaniding and replacing gold mud 1 hydrometallurgy controlled trial data are as shown in the table, from data shown in the table as can be known: the cyaniding and replacing gold mud is after preroasting of the present invention, nitric acid dosage when having reduced acidleach in the hydrometallurgical processes, shortened extraction time, the generation quantity of slag is few, finished product gold probability height up to standard has reduced purification costs.
Cyaniding and replacing gold mud 2 preroastings: cyaniding and replacing gold mud 2 is evenly packed in the titanium groove, after dividing equally, make gold mud uniform distribution in the titanium groove, stir when being beneficial to roasting, observe bottom roasting situation (whether grilling thoroughly with roasting even), improve roasting effect, the titanium groove is placed in the resistance furnace then by the roasting of following design temperature program, whole roasting process constantly stirs gold mud and prevents the gold mud caking: first 300 ℃ of roasting 1.5h of design temperature, 400 ℃ of roasting 1.5h of secondary design temperature, 650 ℃ of roastings of three design temperatures become ash to the gold mud color, and naturally cooling gets final product.In the whole roasting process behind the design temperature resistance furnace heat up automatically.
Cyaniding and replacing gold mud 2 hydrometallurgys: will naturally cool to 100 ℃ through the cyaniding and replacing gold mud 2 of above-mentioned preroasting, and add water logging not to gold mud, taking-up feeds intake, by existing cyaniding and replacing gold mud hydrometallurgical processes metallurgy.
Cyaniding and replacing gold mud 3 preroastings: cyaniding and replacing gold mud 3 is evenly packed in the titanium groove, after dividing equally, make gold mud uniform distribution in the titanium groove, stir when being beneficial to roasting, observe bottom roasting situation (whether grilling thoroughly with roasting even), improve roasting effect, the titanium groove is placed in the resistance furnace then by the roasting of following design temperature program, whole roasting process constantly stirs gold mud and prevents the gold mud caking: first 400 ℃ of roasting 1h of design temperature, 500 ℃ of roasting 1.2h of secondary design temperature, 700 ℃ of roastings of three design temperatures become ash to the gold mud color, and naturally cooling gets final product.In the whole roasting process behind the design temperature resistance furnace heat up automatically.
Cyaniding and replacing gold mud 3 hydrometallurgys: will naturally cool to 200 ℃ through the cyaniding and replacing gold mud 3 of above-mentioned preroasting, and add water logging not to gold mud, taking-up feeds intake, by existing cyaniding and replacing gold mud hydrometallurgical processes metallurgy.
Claims (5)
1. the preroasting technology of a cyaniding and replacing gold mud, it is characterized in that: the cyaniding and replacing gold mud is pressed the roasting of following design temperature program, whole roasting process constantly stirs gold mud and prevents the gold mud caking: first 300～400 ℃ of roasting 1～1.5h of design temperature, 400～600 ℃ of roasting 1～1.5h of secondary design temperature, 650～750 ℃ of roastings of three design temperatures to gold mud color becomes canescence, naturally cooling, roasting is promptly finished.
2. the preroasting technology of cyaniding and replacing gold mud as claimed in claim 1 is characterized in that: three design temperature roasting stages, utilize conventional spray technology to reclaim impurity mercury.
3. the hydrometallurgical processes of a cyaniding and replacing gold mud at first adds nitric acid and carries out the acidleach removal of impurities in the cyaniding and replacing gold mud, then residue is soaked slag and carries out the molten gold of chloroazotic acid, makes gold enter solution, contains golden chloroazotic acid through after steaming acid, catching up with nitre, feeds liquid SO again
2, make liquid Au
3+Be reduced into simple substance Au powder, it is characterized in that the cyaniding and replacing gold mud carries out preroasting before acidleach, described preroasting is by the roasting of following design temperature program, whole roasting process constantly stirs gold mud and prevents the gold mud caking: first 300～400 ℃ of roasting 1～1.5h of design temperature, 400～600 ℃ of roasting 1～1.5h of secondary design temperature, 650～750 ℃ of roastings of three design temperatures become canescence to the gold mud color, naturally cooling, in gold mud, add water to and flood gold mud, send to acidleach.
4. the hydrometallurgical processes of cyaniding and replacing gold mud as claimed in claim 3 is characterized in that: add water after naturally cooling to 100～200 ℃ in gold mud.
5. as the hydrometallurgical processes of claim 3 or 4 described cyaniding and replacing gold mud, it is characterized in that:, utilize conventional spray technology to reclaim impurity mercury three design temperature roasting stages.
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| CN201010030127A CN101760625A (en) | 2010-01-08 | 2010-01-08 | Preroasting and hydrometallurgy process for cyaniding and replacing gold mud |
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| CN201010030127A CN101760625A (en) | 2010-01-08 | 2010-01-08 | Preroasting and hydrometallurgy process for cyaniding and replacing gold mud |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914250A (en) * | 2015-12-24 | 2017-07-04 | 中国石油天然气股份有限公司 | Catalyst for hydrotreatment of residual oil and preparation method thereof |
-
2010
- 2010-01-08 CN CN201010030127A patent/CN101760625A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914250A (en) * | 2015-12-24 | 2017-07-04 | 中国石油天然气股份有限公司 | Catalyst for hydrotreatment of residual oil and preparation method thereof |
| CN106914250B (en) * | 2015-12-24 | 2019-07-05 | 中国石油天然气股份有限公司 | Catalyst for hydrotreatment of residual oil and preparation method thereof |
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Open date: 20100630 |