CN1030401C - Gold-extracting process with liquid film of soaking while grinding and its equipment - Google Patents
Gold-extracting process with liquid film of soaking while grinding and its equipment Download PDFInfo
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- CN1030401C CN1030401C CN91106261A CN91106261A CN1030401C CN 1030401 C CN1030401 C CN 1030401C CN 91106261 A CN91106261 A CN 91106261A CN 91106261 A CN91106261 A CN 91106261A CN 1030401 C CN1030401 C CN 1030401C
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Abstract
The present invention relates to a liquid membrane gold extraction process with a grinding and soaking process. The grinding and soaking process is completed in a tower-type soaking and grinding machine, and an internal phase water-soluble back extraction agent in emulsion preparation processes adopts alkali or basic salt or inorganic salt. In order to realize the tower-type soaking and grinding machine designed by the process, a spiral shaft is composed of a shaft sleeve barrel type spiral shaft and a spiral central shaft. The spiral is in a both end supporting structure, a venting device is arranged on the tower bottom, and compressed air is exhausted from the bottom of the spiral shaft. The process is simple, production period is shortened to 1/50, gold recovery rate is more than 90%, cyanide can be circularly used, so the process has no environmental pollution, and meanwhile, the present invention has low energy consumption and can greatly reduce production cost.
Description
The invention provides and a kind ofly adopt processing method that soaking while grinding and its equipment-the liquid film extraction technology extracts gold from and from gold mine for implementing the special tower immersing-by-grinding machine that this technology designs.
In recent years, along with gold production constantly develops, seek to develop new resource and more and more paid attention to by people with recycling low-grade gold.The modern heap leaching method that adopts in the mining industry is exactly one of effective ways of handling low grade ore.But gold content concentration is extremely low in the heap leaching solution, and enrichment and extraction be difficulty relatively.In addition, what industry employing at present was more is zinc replacement and carbon-in-pulp process, for example, and its process flow diagram of carbon-in-pulp process such as Fig. 1.It comprises: ore reduction 1, ore grinding 2, classification 3, regrind 4, dense 5, multistage leaching 6, absorption 7, desorb 8, charcoal regeneration activating 9 and electrolysis 10 several master operations.Because these technologies are tediously long, big, high power consumption of facility investment and abrasion all make the production cost of gold higher.This technology makes golden extraction yield lower owing to run the gold loss that charcoal causes simultaneously, and there is the development that the problems such as pollution of environment is all limited this technology in the loss of cyaniding leach liquor.The key problem in technology first ore powder comminution soaking technology that the present technology of taking is difficult to overcome length, equipment loss and power consumption is more serious; It two is that to leach in your liquid gold concentration too low, extracts difficulty and the prussiate problems such as causing sewage disposal that runs off.Also once reported with technology of the present invention is relatively more approaching, adopting the cyanidation gold-extracted operation of soaking while grinding and its equipment is to carry out in horizontal ball mill.But horizontal ball mill is finished the soaking while grinding and its equipment operation and only is used for using the circulation cyanating solution at grinding section, and can only dissolve 50～70% solvable gold.U.S. Pat 4,269,808 provide a kind of tower grinding mill that utilizes to finish the cyanidation gold-extracted technology of the soaking while grinding and its equipment of ore.But all on cylindrical shell 3, spiral then is the hanging type structure to two point of suppon of this immersing-by-grinding machine screw shaft.Therefore, the running of not only outfit of equipment height, and spiral easily produces beat, causes the load shakiness even the left alone without help phenomenon of card occurs.Bad owing to carrying golden leaching condition simultaneously, golden extraction yield can only be reached about 89%.About from dilute solution, reclaiming the method for precious metal, developed a kind of new liquid Membrane Separation Technique in recent years.For example (1989,9(4), 39) were once reported and are utilized emulsion liquid membrane to extract gold in the membrane science technical journal.Its technological process is: will make the milk sap that obtains of breast and be distributed to and carry out liquid film in the leach liquor after mill soaks separation and extract and handle.Then liquid after extracting processing through liquid film is separated, its raffinate can be back to the cyaniding operation and recycle as heap leaching solution, and parting liquid is carried out breakdown of emulsion, the high density through separating again behind the breakdown of emulsion after obtaining enrichment contains golden liquid, directly carries out electrolysis and can get the high purity gold.And being can be used as system dairy milk starting material circulation system breast, the emulsion liquid membrane organic phase uses.System breast in above-mentioned technology, i.e. the preparation of milk sap is an important procedure, and it is to contain flowing carrier, and the organic solvent of tensio-active agent is made with interior fully the mixing under certain speed of containing water-soluble reverse-extraction agent.At present, adopt in the emulsion liquid membrane gold extraction technology, reverse-extraction agent often utilizes thiocarbamide and hydrochloric acid.But the gold of thiocarbamide after as the reverse-extraction agent enrichment is difficult to smelt and obtains proof gold, and thiocarbamide not only costs an arm and a leg, and it still is a kind of carcinogenic substance.In above-mentioned acid system, can generate simultaneously hypertoxic prussic acid, so this technology is difficult in the industry and uses.
The objective of the invention is to overcome existing shortcoming in the existing gold extraction technology, a kind of improved soaking while grinding and its equipment-liquid film extraction gold extraction technology is provided.The rate of recovery height that this technical process is short, golden, simple to operate, and can solve the environmental pollution of general cyanidation gold-extracted factory.In addition, adopt this technological equipment investment few, equipment loss and energy consumption are low, can reduce productive expense significantly and be suitable for the suitability for industrialized production application.Another object of the present invention is for realizing that above-mentioned technology designs a kind of specific equipment one side edging and soaks tower grinding-leaching mill.
Soaking while grinding and its equipment of the present invention-its schema of liquid film extraction technology as shown in Figure 2, among the figure: 11, fragmentation; 12, soaking while grinding and its equipment; 13, solid-liquid separation; 14, liquid film extraction; 15, system breast; 16, breakdown of emulsion; 17, electrolysis.Promptly this technology comprises ore reduction 11, utilize cyanating solution to carry out soaking while grinding and its equipment 12 to the mineral aggregate after pulverizing, leach liquor carries out solid-liquid separation 13, utilization contains flowing carrier, the organic solvent of tensio-active agent with contain water-soluble reverse-extraction agent system breast 15, to carry out liquid film extraction 14 in the leach liquor that make after emulsion is distributed to separation, isolated inorganic water returns the soaking while grinding and its equipment operation and recycles its prussiate, and emulsion carries out breakdown of emulsion 16 processing, its organic phase is returned the newborn operation 15 of system, water be enrichment contain golden liquid can directly carry out electrolysis 17 purifying gold be finished cyanidation gold-extracted technology.Technology of the present invention is characterised in that its soaking while grinding and its equipment operation 12 finishes in tower grinding-leaching mill.The soaking while grinding and its equipment tower grinding-leaching mill will be pulverized mineral aggregate (the about 15mm of granularity) and soak through mill and make mineral aggregate be ground to about 80% when being 75 μ, and the gold about 92% that contains in the ore is leached, and finishes this operation.It is to adopt alkali or basic salt or add the inorganic salt that are not more than alkali or basic salt weight 50% in alkali or basic salt that its another feature is to make aqueous solution back extraction reagent in the interior phase solution used in the newborn operation 15, for example, sodium hydroxide or potassium, calcium hydroxide, yellow soda ash or potassium, sodium pyrosulfate or potassium, sodium sulfate or potassium, sodium-chlor etc.Making newborn operation 15 is as follows: 1, prepare certain density tensio-active agent, and mutually water-soluble back extraction reagent in the oil-phase solution of carrier and organic solvent composition reaches, wherein surfactant content (accounting for the oil phase concentration of volume percent) is 0.1～20%; Vector contg is 1～25%, and surplus is organic solvent.2, be 0.1～20 mixed by volume with the oil-phase solution that is mixed with interior solution mutually, at emulsor, colloidal mill for example, ultrasonic emulsator or adopt high-speed stirring to tremble to mix and carry out emulsification in the device and make Water in Oil emulsion.Other operation in soaking while grinding and its equipment of the present invention-liquid film extraction gold extraction technology can be carried out according to prior art.
In the technology of the invention described above, the immersing-by-grinding machine that need have certain performance just can be finished the soaking while grinding and its equipment operation.The present invention carries out bigger improvement and has designed a kind of specific equipment soaking while grinding and its equipment tower grinding-leaching mill that can satisfy above-mentioned processing requirement on the basis of existing tower grinding-leaching mill for this reason.Tower grinding-leaching mill as prior art comprises power set, tower body and three major portions of spiral.Tower body is made up of cylindrical shell, liner plate and accessory device as the immersing-by-grinding machine main body, and cylindrical shell is easily manufactured often be designed to upper and lower two sections (or multistages), and the steel cylinder inner side-wall is lined with liner plate.The cylindrical shell epimere is provided with material inlet and overflow port, and hypomere is established the sand return mine inlet, accessory devices such as vollyball plasma discharge mouth.Spiral is the main motion parts and the vulnerable part of tower grinding-leaching mill, and it is made up of screw shaft, screw-blade.All on the framework above the cylindrical shell, spiral then is hanging type to screw shaft two steady bearings in the common tower grinding-leaching mill.Power set also is arranged on the framework on cylindrical shell top, comprises motor, revolving gear, step-down gear etc.The power of motor drives screw rotation through the step-down gear speed change by revolving gear.Tower grinding-leaching mill of the present invention comprises power set equally, three major portions of tower body and spiral, it is characterized in that spiral is by screw shaft, spiral central shaft and screw-blade are formed, screw shaft is a pipe spreader, be added with a coaxial spiral central shaft in the pipe spreader, screw shaft top and central shaft join fixing, and screw-blade constitutes spiral with common spiral same fixed outside screw shaft.Central shaft is supported on the bearing of cylindrical shell upper/lower terminal framework, forms two end supports formula spirane structure.The beat problem taking place because spiral is a two end supports when having solved spiral effectively and running up, avoids causing faults such as card is left alone without help.And the length of shortening screw shaft that can be bigger, the total height of reduction equipment.When screw shaft was taked two end supports formula structure, for solving the ore pulp sealing problem at point of suppon place, tower bottom, steady bearing added an axle sleeve at the bottom of tower.And with junction good seal at the bottom of the tower, central shaft pierces on the steady bearing that is installed in the axle sleeve at the bottom of the tower.The axle sleeve height is less than screw shaft, but the overflow port height on should a little higher than cylindrical shell can prevent effectively that also immersion liquid from entering in the central shaft.Another feature of the present invention is, adds breather at tower bottom, and pressurized air can be imported by tower bottom, and by the derivation that the screw shaft bottom is evenly distributed, satisfies the aerobic requirement of extract technology.Breather is made up of inlet pipe, tower spirit hole and axle sleeve.Pressurized air charges into inlet pipe, enters between axle sleeve and the central shaft and along it by pore to make progress, and instead discharges then to the screw shaft bottom from the screw shaft inwall and the lining outside again.When immersing-by-grinding machine turns round, owing to arrange the pressurized air that stability of flow is arranged and be evenly distributed, satisfied technologic requirement on the one hand from the screw shaft bottom, also in immersing-by-grinding machine, form a upstream on the other hand, help the classification in each leaching district in the cylindrical shell.Make the product that reaches qualified grade discharge immersing-by-grinding machine immediately, crushing phenomenon did not take place, this also is one of high important factor of immersing-by-grinding machine ore grinding and golden leaching efficiency.Simultaneously this breather had both made when long-time left alone without help car, and this device can not stop up yet.In addition, this immersing-by-grinding machine has also been done improvement at power setting part, it is characterized in that setting up the auxiliary starter power system again except that the subject impetus system, and this auxiliary starting system is a low speed trigger mechanism.When needing the starting immersing-by-grinding machine, auxiliary starting system is the low speed starting, and starting finishes, and by arrangement of clutch auxiliary starting system is freed, this system's stop running.The motor that so just greatly reduces the main body transmission system is equipped with power.As accessory device oil electric engine is arranged still.When the left alone without help electricity of accident, can start oil electric engine drive auxiliary starting system low speed and keep on the go, the interior medium of immersing-by-grinding machine is not silted up because of the settling time is oversize.Be described further below by the structure of example technology of the present invention and specific equipment.
Example 1, tower grinding-leaching mill
Accompanying drawing 3 is the tower grinding-leaching mill structure iron.Accompanying drawing 4 is spiral and breather structure iron.By accompanying drawing 3, tower grinding-leaching mill is by power set, and tower body and spiral are formed, and its power set comprises subject impetus system and auxiliary starting system two portions, and its subject impetus system is made up of main motor 21, revolving gear 22 and engine reduced power machine 23; Auxiliary starting system is by auxiliary motor 26, and assisted deceleration machine 25 and arrangement of clutch 24 are formed.Power set is installed on the tower grinding-leaching mill body barrel on the square bearer.Tower body is by cylindrical shell 28, and cylindrical shell 28 interior lining panels 29 are positioned at the material inlet 35 of cylindrical shell epimere and the vollyball plasma discharge mouth 32 of overflow port 27 and cylindrical shell hypomere, and sand return mine inlet 34 and breather 33 are formed.By accompanying drawing 4 spirals and breather structure, its spiral is by screw shaft 30, spiral central shaft 31, and screw-blade 36 is formed.Screw shaft 30 is a pipe spreader, is added with a coaxial spiral central shaft in the sleeve pipe, and screw shaft 30 tops and central shaft 31 join fixing, at the screw shaft external fixation screw-blade are arranged.The spiral central shaft is installed in cylindrical shell central authorities by the upper and lower steady bearing 37,38 of cylindrical shell upper/lower terminal.Breather is made up of axle sleeve 39, pore 40, inlet pipe 41.Axle sleeve 39 be its internal diameter greater than central shaft 31 external diameters, its external diameter is less than the Steel Sleeve of screw shaft internal diameter, it is installed in tower chassis central authorities, and and shell liner between good seal.The spiral central shaft pierces in the axle sleeve 39 and is installed on the lower supporting bearing.Axle sleeve 39 height should be higher than the overflow port upper surface on the cylindrical shell, to guarantee that immersion liquid can not flow in the central shaft in the cylindrical shell.Have pore 40 at the bottom of the tower in axle sleeve 39, and be installed into tracheae 41 at tower bottom institute's ventilate 40 is comprised within it.By inlet pipe 41, pore 40 and between central shaft 31 and axle sleeve 39 and between axle sleeve 39 and screw shaft 30 inwalls air can bottom screw shaft, be discharged in the cylindrical shell then by importing outside the tower body.When needing the starting immersing-by-grinding machine, start auxiliary motor 26, adjust assisted deceleration machine 25 and engine reduced power machine 23, handle arrangement of clutch 4 and make the starting of spiral low speed, starting finishes, and handles arrangement of clutch 24 auxiliary starting system is freed, and starts main motor 21 spiral is run well.And in inlet pipe 41, blasting pressurized air, air is evenly discharged by the screw shaft bottom.Other operation is identical with common tower grinding-leaching mill, can efficiently finish the soaking while grinding and its equipment operation.
Example 2 milk sap preparations (making newborn operation)
The preparation water-in-oil emulsion, oil-phase solution (volume ratio) is an anhydrous sorbitol oleic acid monoester 5%, tri-n-octyl amine 4%, polyhutadiene 2%, kerosene 89%.With the 1%(weight ratio) Na
2CO
3The aqueous solution slowly was added to ratio in the oil phase (volume ratio) 1: 1, used violent stirring, and about 15 minutes of 3000 rev/mins of stirring velocitys promptly can be made into a kind of stable water in oil milk sap.
Example 3, gold extraction technology of the present invention and carbon slurry therapy extracting gold technology simultaneous test
Utilize soaking while grinding and its equipment tower grinding-leaching mill provided by the invention and soaking while grinding and its equipment-liquid film extraction technology to compare test to test the carbon slurry therapy extracting gold technology that adopts with industry at present 10T/ day, its mean value is compared as follows:
10T/ day carbon pulp factory ※ 10T/ Japan invented technology
Energy expenditure (KWh/T ore deposit) 107.7 49.3
Comminution soaks operation and consumes 100 0.43
Productive expense 100 0.51
Gold production charges 100 0.62
※ c 10T/ day carbon pulp factory is 100 to ask relative value.
By above example, adopt the more carbon slurry therapy extracting gold technology of gold extraction technology of the present invention and present employing to compare and have the following advantages:
1, technical process shortens dramatically, and the production cycle shortens nearly 50 times, and gold recovery can reach more than 90%.
2, facility investment is few, only is 60～65%.
3, energy consumption is low can save approximately 50%, can save productive expense about 50%.
4, prussiate can be recycled, environmentally safe.
In addition, the mill that soaking while grinding and its equipment tower grinding-leaching mill provided by the invention also can be finished cyanidation gold-extracted technology separately soak operation and and other processing method of carrying the concentration extraction gold of golden leach liquor of adopting of industry at present combine, also can receive certain good result.The mill that this soaking while grinding and its equipment technology also can be used for other is contained the precious metal ore metallic element soaks processing.
Claims (3)
1, a kind of soaking while grinding and its equipment-liquid film extraction gold extraction technology comprises ore reduction, soaking while grinding and its equipment, solid-liquid separation, liquid film extraction, system breast, breakdown of emulsion and several roads of electrolysis master operation composition, it is characterized in that this makes in the interior phase solution used in the newborn operation water-soluble back extraction reagent is to adopt alkali or basic salt, perhaps in alkali or basic salt, add the inorganic salt that are not more than alkali or basic salt weight 50%, described alkali, basic salt or inorganic salt are: sodium hydroxide or potassium, calcium hydroxide, yellow soda ash or potassium, sodium pyrosulfate or potassium, sodium sulfate or potassium, sodium-chlor.
2, a kind of soaking while grinding and its equipment tower grinding-leaching mill of the described technology of enforcement claim 1 that is exclusively used in is by power set, tower body and spiral are formed, it is characterized in that spiral is made up of screw shaft, spiral central shaft and screw-blade, screw shaft is a pipe spreader, be added with a coaxial spiral central shaft in the pipe spreader, and screw shaft top and central shaft join fixing, and central shaft is supported on the bearing of cylindrical shell upper/lower terminal framework, form two end supports formula spirane structure; Simultaneously steady bearing adds an axle sleeve at the bottom of tower, and with junction good seal at the bottom of the tower, central shaft pierces on the steady bearing that is installed in the axle sleeve at the bottom of the tower; In addition, the bottom of tower body adds breather, breather is made up of inlet pipe, pore and axle sleeve, enters between axle sleeve and the central shaft by pore so that charge into the pressurized air of inlet pipe, and upwards instead discharges to the screw shaft bottom from the screw shaft inwall and the lining outside along it again.
3, according to the described tower grinding-leaching mill of claim 2, it is characterized in that power set except that the subject impetus system, sets up the auxiliary starter power system again, this auxiliary starting system is a low speed trigger mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91106261A CN1030401C (en) | 1991-10-11 | 1991-10-11 | Gold-extracting process with liquid film of soaking while grinding and its equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91106261A CN1030401C (en) | 1991-10-11 | 1991-10-11 | Gold-extracting process with liquid film of soaking while grinding and its equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1071465A CN1071465A (en) | 1993-04-28 |
| CN1030401C true CN1030401C (en) | 1995-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91106261A Expired - Fee Related CN1030401C (en) | 1991-10-11 | 1991-10-11 | Gold-extracting process with liquid film of soaking while grinding and its equipment |
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| Country | Link |
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| CN (1) | CN1030401C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044823C (en) * | 1996-07-05 | 1999-08-25 | 中南工业大学 | Method and apparatus for activating and dissolving sulfide ores containing gold |
| CN1098933C (en) * | 1998-03-05 | 2003-01-15 | 中国科学院金属研究所 | Reinforced alkaline-leaching gold-extracting technology for arsenic-containing sulphur-containing difficult-to-extract gold ore |
| CN101892386B (en) * | 2010-06-10 | 2012-05-30 | 南京中锗科技股份有限公司 | Demulsifying and detoxifying method of gallium extracting system |
| CN104694764B (en) * | 2015-03-09 | 2016-08-24 | 中南大学 | A kind of Strengthen education method of fine fraction trapping gold |
| CN107083481B (en) * | 2017-06-16 | 2023-05-12 | 华北理工大学 | Hard agglomeration pickling machine |
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1991
- 1991-10-11 CN CN91106261A patent/CN1030401C/en not_active Expired - Fee Related
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| CN1071465A (en) | 1993-04-28 |
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