阅读说明：本技术 一种铜矿石柱浸-萃取联动试验方法 (Copper ore column leaching-extraction linkage test method ) 是由 杨均流 刘云峰 张罗虎 梁新星 赵声贵 徐敬元 曹庭校 于 2019-10-31 设计创作，主要内容包括：本发明涉及一种铜矿石柱浸-萃取联动试验方法,首先通过酸性含铁萃余液喷淋启动,浸出液收集于集液桶中,当浸出液含铜大于3g/l时,将集液桶中的浸出液进行萃取混合操作,混合后在分液装置中静置分层,余液返回集液桶循环浸出,有机相存储于有机相储桶中。每日取样分析浸出液铜浓度,当浸出液含铜大于3g/l,保持浸出-萃取联动操作。本发明既防止闭路浸出循环中浸出液铜离子浓度过高抑制浸出效果,又避免开路浸出循环中酸、铁浓度不能维持导致铜浸出乏力,可以有效模拟生物浸出-萃取生产的实际情况,获得一手的具有直接指导意义的试验数据用于铜矿石浸出生产优化。(The invention relates to a copper ore column leaching-extraction linkage test method, which comprises the steps of firstly, starting by spraying acidic iron-containing raffinate, collecting the leachate in a liquid collecting barrel, extracting and mixing the leachate in the liquid collecting barrel when the copper content of the leachate is more than 3g/l, standing and layering the leachate in a liquid separating device after mixing, returning the residual liquid to the liquid collecting barrel for circular leaching, and storing an organic phase in an organic phase storage barrel. Sampling and analyzing the copper concentration of the leachate every day, and keeping leaching-extraction linkage operation when the copper content of the leachate is more than 3 g/l. The invention not only prevents the leaching effect of inhibiting the excessive high concentration of the copper ions in the leaching solution in the closed leaching circulation, but also avoids the weakness of copper leaching caused by the incapability of maintaining the concentrations of acid and iron in the open leaching circulation, can effectively simulate the actual situation of bioleaching-extraction production, and obtains test data with direct guiding significance for optimizing the copper ore leaching production.)

1. A copper ore column leaching-extraction linkage test method is characterized by comprising the following steps: adopting a biological column immersion circulating system and an extraction test system; the biological column leaching circulation system comprises a leaching column 1, a heat-preservation water bath circulator 2, a peristaltic pump 3 and a liquid collecting barrel 4; the extraction test system comprises an extraction mixer 5, a liquid separating device 6 and an organic phase storage barrel 7; the extraction mixer 5 is filled with a certain volume of extraction organic phase; which comprises the following steps:

s1, filling the target copper ore into the leaching column 1, injecting a certain volume of acidic iron-containing raffinate into the liquid collecting barrel 4, spraying the acidic iron-containing raffinate into the leaching column 1 through the peristaltic pump 3, controlling the temperature in the leaching column 1 through the heat-preservation water bath circulator, and collecting the leachate into the liquid collecting barrel through the bottom of the leaching column 1;

s2, periodically sampling the leachate collected in the liquid collecting barrel to analyze the copper concentration, and mixing the leachate and the extraction organic phase in an extraction mixer when the copper concentration of the leachate in the liquid collecting barrel is more than a certain amount;

s3, transferring the fully mixed solution in the extraction mixer to a liquid separating device for standing and layering, transferring the layered residual liquid to a liquid collecting barrel for circular leaching, allowing the layered organic phase to enter an organic phase storage barrel, and performing back extraction by using sulfuric acid and then regenerating;

s4, repeating the steps until the ore is leached to achieve the expected leaching effect;

and S5, calculating the copper leaching amount and the leaching rate in a fixed time period according to the copper concentration sampled at regular time by the liquid collecting barrel 4 and the volume of the leaching liquid during sampling.

2. The copper ore column leaching-extracting linkage test method according to claim 1, characterized in that: and S2, when the copper concentration of the leaching solution in the liquid collecting bucket is more than 3g/l, mixing the leaching solution and the extraction organic phase in an extraction mixer.

3. The copper ore column leaching-extracting linkage test method according to claim 1, characterized in that: in S3, the catalyst is regenerated after back extraction with 180g/l sulfuric acid.

4. The copper ore column leaching-extracting linkage test method according to claim 1, characterized in that: different types of heaping arrangements are performed on the corresponding types of ores according to the leaching rate.

Technical Field

The invention belongs to the technical field of wet-process nonferrous metallurgy, and particularly relates to a copper ore column leaching-extraction linkage test method.

Background

Due to the obvious advantages of low cost, low energy consumption and the like, the bioleaching-extraction-electrodeposition process becomes the first choice for the economic utilization of the secondary copper sulfide ore. Chalcocite is used as a main occurrence mineral of secondary copper sulfide ore, the copper-containing grade of the chalcocite is greatly different in different ore bodies and is different even in the same ore body, for example, the rich ore grade of a certain copper ore in Burma can reach 4%, and the lean ore is as low as 0.04%. Different ores with different grades have different leaching rates during bioleaching, and conventional experiments cannot simulate actual production so as to obtain corresponding leaching rates.

Disclosure of Invention

The invention provides a copper ore column leaching-extracting linkage test method, which aims to solve the technical problems that: the actual effect of bioleaching-extraction production can be simulated, and the leaching rate can be obtained.

In order to solve the technical problems, the invention provides a copper ore column leaching-extracting linkage test method which is characterized by comprising the following steps: adopting a biological column immersion circulating system and an extraction test system; the biological column leaching circulation system comprises a leaching column 1, a heat-preservation water bath circulator 2, a peristaltic pump 3 and a liquid collecting barrel 4; the extraction test system comprises an extraction mixer 5, a liquid separating device 6 and an organic phase storage barrel 7; the extraction mixer 5 is filled with a certain volume of extraction organic phase; which comprises the following steps:

s1, filling the target copper ore into the leaching column 1, injecting a certain volume of acidic iron-containing raffinate into the liquid collecting barrel 4, spraying the acidic iron-containing raffinate into the leaching column 1 through the peristaltic pump 3, controlling the temperature in the leaching column 1 through the heat-preservation water bath circulator, and collecting the leachate into the liquid collecting barrel through the bottom of the leaching column 1;

s2, periodically sampling the leachate collected in the liquid collecting barrel to analyze the copper concentration, and mixing the leachate and the extraction organic phase in an extraction mixer when the copper concentration of the leachate in the liquid collecting barrel is more than a certain amount;

s3, transferring the fully mixed solution in the extraction mixer to a liquid separating device for standing and layering, transferring the layered residual liquid to a liquid collecting barrel for circular leaching, allowing the layered organic phase to enter an organic phase storage barrel, and performing back extraction by using sulfuric acid and then regenerating;

s4, repeating the steps until the ore is leached to achieve the expected leaching effect;

and S5, calculating the copper leaching amount and the leaching rate in a fixed time period according to the copper concentration sampled at regular time by the liquid collecting barrel 4 and the volume of the leaching liquid during sampling.

Has the advantages that: the invention not only prevents the leaching effect of inhibiting the excessive high concentration of the copper ions in the leaching solution in the closed leaching circulation, but also avoids the weakness of copper leaching caused by the incapability of maintaining the concentrations of acid and iron in the open leaching circulation, can effectively simulate the actual situation of bioleaching-extraction production, and obtains test data with direct guiding significance for optimizing the copper ore leaching production.

Drawings

FIG. 1 is a diagram of an experimental system of the invention.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention is provided.

The invention provides a copper ore column leaching-extraction linkage test method, which adopts a biological column leaching circulation system and an extraction test system; the biological column leaching circulation system comprises a leaching column 1, a heat-preservation water bath circulator 2, a peristaltic pump 3 and a liquid collecting barrel 4; the extraction test system comprises an extraction mixer 5, a liquid separating device 6 and an organic phase storage barrel 7; the extraction mixer 5 is filled with a certain volume of extraction organic phase; which comprises the following steps:

s1, filling the target copper ore into the leaching column 1, injecting a certain volume of acidic iron-containing raffinate into the liquid collecting barrel 4, spraying the acidic iron-containing raffinate into the leaching column 1 through the peristaltic pump 3, controlling the temperature in the leaching column 1 through the heat-preservation water bath circulator, and collecting the leachate into the liquid collecting barrel through the bottom of the leaching column 1;

s2, periodically sampling the leachate collected in the liquid collecting barrel to analyze the copper concentration, and mixing the leachate and the extraction organic phase in an extraction mixer when the copper concentration of the leachate in the liquid collecting barrel is more than 3 g/l;

s3, transferring the fully mixed solution in the extraction mixer to a liquid separating device for standing and layering, transferring the layered residual liquid to a liquid collecting barrel for circular leaching, allowing the layered organic phase to enter an organic phase storage barrel, performing back extraction by using 180g/l sulfuric acid, and then regenerating;

s4, repeating the steps until the ore is leached to achieve the expected leaching effect;

s5, calculating the copper leaching amount and the leaching rate in a fixed time period according to the copper concentration sampled at regular time by the liquid collecting barrel 4 and the volume of the leaching liquid during sampling;

and S6, carrying out different types of heaping arrangement on the corresponding types of ores according to the leaching rate.

As shown in fig. 1, fig. 1 is a schematic diagram of a column leaching-extraction linkage test method for high-grade chalcocite according to the present invention. The average grade of a certain section of chalcocite ore body is 3.78%, after ore is filled in a bio-column leaching system of a leaching column, a heat-preservation water bath circulator, a peristaltic pump and a liquid collecting barrel in the picture 1, 18g/l of iron-containing production raffinate containing 15g/h of acid is sprayed and started, the liquid collecting barrel collects the leaching solution and performs daily analysis, when the copper concentration of the leaching solution is more than 3g/l, the leaching solution is transferred to an extraction mixer for extraction operation, then the solution is stood for layering through a liquid separating device, the layered raffinate returns to the liquid collecting barrel for cyclic leaching, and the layered organic phase is regenerated for later use through 180g/l of acid stripping. The ore leaching-extraction linkage operation is carried out for 60 days, and the leaching rate effect of 35 percent is achieved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.