CN102251123A - Gold extraction process of refractory gold ore - Google Patents
Gold extraction process of refractory gold ore Download PDFInfo
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- CN102251123A CN102251123A CN2011101769898A CN201110176989A CN102251123A CN 102251123 A CN102251123 A CN 102251123A CN 2011101769898 A CN2011101769898 A CN 2011101769898A CN 201110176989 A CN201110176989 A CN 201110176989A CN 102251123 A CN102251123 A CN 102251123A
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Abstract
The invention discloses a gold extraction process of refractory gold ore, and the gold extraction process comprises: ore grinding and cyanidation for gold extraction, wherein 2-8% hydrogen peroxide is sprayed to the gold ore heap at 20-40 L/m.h before cyanidation for gold extraction, thus fully exposing and dissociating gold; and an oxygen supplying aeration pipe is arranged in the gold ore heap and the sodium cyanide solution is controlled in a half-bubble ore heap state during cyanidation for gold extraction. The gold extraction process disclosed by the invention has the advantages of simple process, low cost, less environmental pollution and high gold recovery rate, and can be used for making full use of limited gold resources and turning the refractory gold ores into valuable.
Description
Technical field
The invention belongs to the gold production field, relate in particular to a kind of difficult-treating gold mine gold extraction technology.
Background technology
Mostly difficult-treating gold mine is that gold is present in pyrite or quartz reef with the form of microfine and parcel, and gold mine is compared as that of Guangxi in sulfur-bearing, copper, silver, arsenic or pyrite lattice class ore deposit.In recent years, the development and use of China's difficult-treating gold mine have obtained remarkable progress, wherein use to some extent industrial in oxidizing roasting and bio-oxidation pre-treatment indissoluble gold ore deposit, but, these method investments are big, management is difficult, have only the oxidizing roasting method to have actual production to be worth, but there are problems such as apparatus and process is backward, environmental pollution is serious, the golden rate of recovery is low in it.
Summary of the invention
The technical problem to be solved in the present invention provides the difficult-treating gold mine gold extraction technology that a kind of technology is simple, with low cost, low in the pollution of the environment, gold recovery is high, to make full use of limited gold ore resource, difficult-treating gold mine is turned waste into wealth.
Adopt following technical scheme for solving the problems of the technologies described above the present invention: the difficult-treating gold mine gold extraction technology, comprise ore grinding and cyanidation gold-extracted, adopting concentration before cyanidation gold-extracted is that 2～8% hydrogen peroxide fully exposes gold by 20～40 liters/square metre hours spray ore deposit heaps to dissociate; In the heap of ore deposit, the oxygen supply ventpipe is set when cyanidation gold-extracted and controls sodium cyanide solution and be in Ban Pao ore deposit heap state.
Oxygen supply ventpipe one end is exposed to the ore deposit out-pile, and the other end inserts the ore deposit heap end.
This technology comprises the steps:
＜1〉ore grinding and build heap gold mine is milled to granularity 6～10mm, directly heap is built the ore deposit heap, and per 3～8 square metres are provided with an oxygen supply ventpipe in the heap of ore deposit, make the one end be exposed to the ore deposit out-pile, and the other end inserts the ore deposit heap end;
＜2〉washup is that 2～8% hydrogen peroxide fully exposes gold by 20～40 liters/square metre hours spray ore deposit heaps to dissociate, clean the ore deposit with clear water again and pile with concentration earlier;
＜3〉transferring alkali to use lime to regulate ore deposit heap pH is 10～11;
＜4〉cyanidation gold-extracted working concentration be 0.03～0.1% sodium cyanide solution by 12～38 liters/square metre hours spray ore deposit heaps, and the control sodium cyanide solution is in Ban Pao ore deposit heap state.
In cyanidation gold-extracted, the working concentration of sodium cyanide solution is 8～15 days 0.1% early stage, 15～25 days 0.07% mid-term, 25～30 days 0.03% later stage.
After cyanidation gold-extracted, adopt chlorinated lime to handle the ore deposit heap.
The present invention adopts cheap oxidant hydrogen peroxide efficient pre-treatment difficult-treating gold mine apace at normal temperatures and pressures, make gold fully expose to dissociate to be converted into and easily soak gold mine, the oxidized liquid phase that enters of major parts such as sulphur arsenic is discharged, for follow-up cyanidation gold-extracted step provides clean materials, solved the problem of ADSORPTION OF GOLD such as sulphur arsenic in the cyaniding operation, and the hydrogen peroxide oxidation decomposition rate is fast, contamination-free, liquid waste disposal is convenient; Simultaneously, for improving cyaniding efficient, the control sodium cyanide solution is in Ban Pao ore deposit heap state, and in the heap of ore deposit, the oxygen supply ventpipe is set, heap upper part in ore deposit is spray infiltration state like this, and the bottom is divided into soaking state, and whole ore deposit heap fully contacts with sodium cyanide solution, accelerate extraction rate, improved gold recovery.Technology of the present invention is with low cost, simple, low in the pollution of the environment, and the difficult-treating gold mine resource can be fully used.
Description of drawings
Fig. 1 is an ore deposit heap view of using difficult-treating gold mine gold extraction technology of the present invention.
Among the figure: 1 oxygen supply ventpipe, 2 sprinkling systems, 3 ore deposits heap, your liquid level 4 Ban Pao ore deposit dump leaching steep, 5 Gui Yegou, 6 your liquid direction are oozed direction under 7 spray liquids.
Embodiment
Ore from Guangxi that than gold mine, it is 0.24 that average grade is gone into to pile in its ore deposit, metalliferous mineral mainly is based on metal sulfide ore in the ore, the ore mineral compositional analysis the results are shown in Table 1:
Table 1 that than gold mine ore mineral compositional analysis
As seen, this ore is the MC thing, contains arsenic, carbon containing, the difficult type gold mine of golden ultra tiny dip-dye.Below use the present invention and handle this ore, Fig. 1 has shown treating processes chats heap state, it is distributing oxygen supply ventpipe 1 in the heap 3 of ore deposit, sprinkling system 2 is piled 3 spraying agents to the ore deposit, be controlled at ore deposit heap Lower Half formation Ban Pao ore deposit dump leaching and steep your liquid level 4, spray liquid soaks into ore deposit heap 3 along oozing direction 7 under the spray liquid, and your liquid pool your liquid flows to along your liquid direction 6 of the expensive liquid ditch 5 of heelpiece.
＜1〉ore grinding and build heap gold mine is milled to granularity 6～10mm, directly heap is built the ore deposit heap, and per 3～8 square metres are provided with an oxygen supply ventpipe in the heap of ore deposit, make the one end be exposed to the ore deposit out-pile, and the other end inserts the ore deposit heap end;
＜2〉washup is that 8% hydrogen peroxide fully exposes gold by 20 liters/square metre hours spray ore deposit heaps to dissociate, after the abundant oxidation in 8 days, clean ore deposit heap (oxidation rinsing waste liquid otherwise processed is with the minimizing pollution) with clear water again with concentration earlier;
＜3〉transferring alkali to use lime to regulate ore deposit heap pH is 10～11;
＜4〉cyanidation gold-extracted use sodium cyanide solution is piled by 12 liters/square metre hours spray ore deposits, and the control sodium cyanide solution is in Ban Pao ore deposit heap state; The working concentration of sodium cyanide solution is 8～15 days 0.1% early stage, 15～25 days 0.07% mid-term, 25～30 days 0.03% later stage, leaches when extremely gold grade is lower than 40mg/t in your liquid and finishes.
＜5〉after ore deposit heap environmental protection treatment spray finishes, add a certain amount of chlorinated lime and handle the residual sodium cyanide in stockyard, assurance ore deposit heap safety is stacked.
Calculate after testing, hydrogen peroxide washup dearsenification sulphur copper rate reaches 95%, and gold leaching rate is 76.4% in the cyanidation gold-extracted ore.
Because organic carbon is more less than other ore deposits in the ore, the Therefore, omited sinter process directly carries out cyanidation gold-extracted after washing ore, the neutralization.
＜1〉ore grinding and build heap with embodiment 1;
＜2〉washup is that 2% hydrogen peroxide fully exposes gold by 40 liters/square metre hours spray ore deposit heaps to dissociate, after the abundant oxidation in 14 days, pile with the clean ore deposit of clear water again with concentration earlier;
＜3〉transfer alkali with embodiment 1;
＜4〉cyanidation gold-extracted use sodium cyanide solution is piled by 38 liters/square metre hours spray ore deposits, and the control sodium cyanide solution is in Ban Pao ore deposit heap state; The working concentration of sodium cyanide solution is 8～15 days 0.1% early stage, 15～25 days 0.07% mid-term, 25～30 days 0.03% later stage, leaches when extremely gold grade is lower than 40mg/t in your liquid and finishes.
Calculate after testing, hydrogen peroxide washup dearsenification sulphur copper rate reaches 93%, and gold leaching rate is 75.0% in the cyanidation gold-extracted ore.
＜1〉ore grinding and build heap with embodiment 1;
＜2〉washup is that 5% hydrogen peroxide fully exposes gold by 30 liters/square metre hours spray ore deposit heaps to dissociate, after the abundant oxidation in 10 days, pile with the clean ore deposit of clear water again with concentration earlier;
＜3〉transfer alkali with embodiment 1;
＜4〉cyanidation gold-extracted use sodium cyanide solution is piled by 25 liters/square metre hours spray ore deposits, and the control sodium cyanide solution is in Ban Pao ore deposit heap state; The working concentration of sodium cyanide solution is 8～15 days 0.1% early stage, 15～25 days 0.07% mid-term, 25～30 days 0.03% later stage, leaches when extremely gold grade is lower than 40mg/t in your liquid and finishes.
Calculate after testing, hydrogen peroxide washup dearsenification sulphur copper rate reaches 92%, and gold leaching rate is 76.1% in the cyanidation gold-extracted ore.
Claims (5)
1. a difficult-treating gold mine gold extraction technology comprises ore grinding and cyanidation gold-extracted, and it is characterized in that adopting before cyanidation gold-extracted concentration is that 2～8% hydrogen peroxide fully exposes gold by 20～40 liters/square metre hours spray ore deposit heaps to dissociate; Described in the heap of ore deposit, the oxygen supply ventpipe is set when cyanidation gold-extracted and controls sodium cyanide solution be in Ban Pao ore deposit heap state.
2. difficult-treating gold mine gold extraction technology according to claim 1 is characterized in that: described oxygen supply ventpipe one end is exposed to the ore deposit out-pile, and the other end inserts the ore deposit heap end.
3. difficult-treating gold mine gold extraction technology according to claim 1 and 2 is characterized in that this technology comprises the steps:
＜1〉ore grinding and build heap gold mine is milled to granularity 6～10mm, directly heap is built the ore deposit heap, and per 3～8 square metres are provided with an oxygen supply ventpipe in the heap of ore deposit, make the one end be exposed to the ore deposit out-pile, and the other end inserts the ore deposit heap end;
＜2〉washup is that 2～8% hydrogen peroxide fully exposes gold by 20～40 liters/square metre hours spray ore deposit heaps to dissociate, clean the ore deposit with clear water again and pile with concentration earlier;
＜3〉transferring alkali to use lime to regulate ore deposit heap pH is 10～11;
＜4〉cyanidation gold-extracted working concentration be 0.03～0.1% sodium cyanide solution by 12～38 liters/square metre hours spray ore deposit heaps, and the control sodium cyanide solution is in Ban Pao ore deposit heap state.
4. difficult-treating gold mine gold extraction technology according to claim 3 is characterized in that: described cyanidation gold-extracted in, the working concentration of sodium cyanide solution is 8～15 days 0.1% early stage, 15～25 days 0.07% mid-term, 25～30 days 0.03% later stage.
5. difficult-treating gold mine gold extraction technology according to claim 4 is characterized in that: described cyanidation gold-extracted after, adopt chlorinated lime to handle the ore deposit heap.
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| CN2011101769898A CN102251123A (en) | 2011-06-28 | 2011-06-28 | Gold extraction process of refractory gold ore |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088222A (en) * | 2013-01-29 | 2013-05-08 | 李兆营 | Process for treating refractory gold ores |
| CN107674994A (en) * | 2017-09-22 | 2018-02-09 | 长春黄金研究院 | A kind of nontoxic while Leaching of Gold of cleaning, the method for copper |
| CN108034836A (en) * | 2017-11-30 | 2018-05-15 | 广西大学 | The method for pre-oxidizing of sulfide type Gold Concentrate under Normal Pressure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088222A (en) * | 2013-01-29 | 2013-05-08 | 李兆营 | Process for treating refractory gold ores |
| CN107674994A (en) * | 2017-09-22 | 2018-02-09 | 长春黄金研究院 | A kind of nontoxic while Leaching of Gold of cleaning, the method for copper |
| CN108034836A (en) * | 2017-11-30 | 2018-05-15 | 广西大学 | The method for pre-oxidizing of sulfide type Gold Concentrate under Normal Pressure |
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Application publication date: 20111123 |