阅读说明：本技术 赤泥中有价元素检测萃取并联型集成芯片及其设计方法 (Parallel integrated chip for detecting and extracting valuable elements in red mud and design method thereof ) 是由 龙威 冯朗 李萌 高�浩 辛晓承 赵章行 任璞 刘云 魏先杰 任焘 于 2021-05-31 设计创作，主要内容包括：本发明专利提供一种赤泥中有价元素检测萃取并联型集成芯片及其设计方法,属于精密设备技术领域。本发明装置较传统的赤泥处理方式,采取微流控技术,针对赤泥中的特有的金属离子,设计了即时检测微流控芯片,先检测赤泥中各金属离子的含量,并根据其活跃性质和价值几何,针对性地萃取赤泥中的金属离子,使赤泥资源综合利用率和经济效益最大化,检测环节对萃取环节提供了理论依据,可以更加高效的萃取赤泥中的金属离子。同时,以较少的萃取剂提高萃取效率,减少杂质影响,缩短萃取流程。(The invention provides a parallel integrated chip for detecting and extracting valuable elements in red mud and a design method thereof, belonging to the technical field of precision equipment. Compared with the traditional red mud treatment mode, the device adopts a micro-fluidic technology, designs an instant detection micro-fluidic chip aiming at the specific metal ions in the red mud, firstly detects the content of each metal ion in the red mud, and pertinently extracts the metal ions in the red mud according to the active property and the value geometry, so that the comprehensive utilization rate and the economic benefit of the red mud resource are maximized, the detection link provides a theoretical basis for the extraction link, and the metal ions in the red mud can be extracted more efficiently. Meanwhile, the extraction efficiency is improved by less extracting agent, the influence of impurities is reduced, and the extraction flow is shortened.)

1. A parallel integrated chip for detecting and extracting valuable elements in red mud is characterized by comprising: a top cover, a real-time detection microfluidic chip, a dual psi-type channel microfluidic chip and a base;

the base, the double psi-type channel microfluidic chip, the instant detection microfluidic chip and the top cover are sequentially connected in an overlapped mode from bottom to top.

2. The parallel integrated chip for detecting and extracting valuable elements in red mud of claim 1, wherein a waste liquid pool is arranged in the middle of the base, and one side of the waste liquid pool is communicated with a three-stage liquid outlet.

3. The parallel integrated chip for detecting and extracting valuable elements in red mud according to claim 1, wherein the upper middle part of the double-psi-type channel micro-fluidic chip is a metal ion extraction area; the left side of the metal ion extraction area is connected with an extractant liquid inlet, and the right side of the metal ion extraction area is connected with an extractant collecting port; the left end and the right end of the metal ion extraction area are respectively provided with a secondary sample liquid inlet and a secondary sample liquid outlet; the diameters of the liquid inlet and the liquid outlet are 0.7mm, and the width and the depth of the channel are both 0.4 mm; the inclination angle is 45 degrees; the length of the channel of the metal ion extraction zone is 14mm, and the width of the channel is 0.6 mm.

4. The parallel integrated chip for detecting and extracting valuable elements in red mud according to claim 1, wherein the middle part of the instant detection microfluidic chip is a metal ion detection area, a first-level sample liquid inlet II and a second detection agent liquid inlet II are respectively formed in the left side of the metal ion detection area, and the first-level sample liquid inlet II is communicated with a second-level sample liquid inlet; a primary liquid outlet is formed in the right side of the metal ion detection area, and a capillary pump is arranged on the right side of the metal ion detection area; the diameters of the liquid inlet and the liquid outlet are 0.7 mm; the length of a detection channel of the metal ion detection area is 11mm, and the width of the detection channel is 0.8 mm; the capillary pump has a length of 7mm and a width of 1 mm.

5. The parallel integrated chip for detecting and extracting valuable elements in red mud according to claim 1, wherein a first sample liquid inlet and a first detector liquid inlet are formed in the top cover.

6. A detection method for detecting and extracting parallel integrated chips of valuable elements in red mud is characterized by comprising the following steps:

s1: introducing a red mud sample into a detection chip from a primary sample liquid inlet, introducing a metal ion detection agent into the detection chip from a detection agent liquid inlet, controlling an inlet valve body and an outlet valve body through a microcomputer to enable the red mud sample and the metal ion detection agent to fully react, and discharging detected waste liquid into a waste liquid pool through a primary liquid outlet;

s2: after the detection is finished, closing the primary liquid inlet of the sample, opening the secondary liquid inlet of the sample, introducing a target ion extracting agent from the liquid inlet of the extracting agent, and controlling the flow velocity of the inlet to enable the extracting agent and the red mud sample to form a stable laminar flow in the metal ion extraction area;

s3: because the concentration of the target ions of the extractant is lower than that of the red mud sample, the extractant extracts the target ions in the red mud sample, the extractant rich in the target ions is collected from the extractant collecting port, and the extracted waste liquid flows into the waste liquid pool from the secondary liquid outlet;

s4: after the extraction experiment was accomplished, the waste liquid was collected from tertiary liquid outlet and is retrieved, avoids the waste liquid polluted environment.

7. The parallel integrated chip for detecting and extracting valuable elements in red mud according to any one of claims 1 to 5, and discloses application thereof in the technical field of precision equipment detection.

Technical Field

The invention belongs to the technical field of precision equipment, and particularly relates to a parallel integrated chip for detecting and extracting valuable elements in red mud and a design method thereof.

Background

The red mud is industrial solid waste discharged after alumina is extracted from bauxite, and has strong basicity, high salinity and complex components and properties. The red mud contains abundant metal oxides except Al₂O₃、Fe₂O₃、SiO₂、CaO、TiO₂And the like, and also a considerable amount of rare earth elements and radioactive elements, such as scandium (60-120 g/t), gallium (60-80 g/t), yttrium (60-150 g/t), uranium (50-60 g/t), and the like. The red mud of different producing areas has different contents of valuable elements due to the influence of environmental factors and refining modes.

1-2 tons of red mud is produced per 1 ton of alumina produced in China every year, and the accumulated stock of red mud is over 42 hundred million tons up to the present world. However, the current domestic red mud disposal method is limited, mainly stacking for open dam construction, and the utilization rate is still less than 4%. Not only occupies a large amount of land resources, but also causes serious pollution to the surrounding atmosphere, water, soil, microorganisms and other environments. Therefore, if valuable components in the red mud resources can be fully recovered, the high alkalinity and the leaching toxicity of the red mud are strictly controlled, the threat and the pollution of the red mud to the environment can be effectively reduced, the resource recovery and the reutilization can be completed, and the comprehensive utilization rate and the economic benefit maximization of the red mud resources are finally realized.

The microfluidic detection extraction chip disclosed by the invention has the characteristics of integration, high efficiency and economy. The principle is that the characteristics of fluid in a micro-channel of the micro-fluidic chip are utilized, and an integration mode is adopted, so that the novel device integrates the detection chip and the extraction chip. The method has the advantages that the detection function and the extraction function are integrated on one chip, the targeted element can be extracted through detection and display, the extraction efficiency is improved by using less extracting agent, the influence of impurities is reduced, the extraction flow is shortened, the valuable elements in the red mud are enriched to the maximum extent, and the economic benefit is maximized. Therefore, the comprehensive utilization rate of the red mud resources is greatly improved based on the detection and extraction integration technology.

The prior red mud extraction technology is subjected to acid leaching to enter a solution, and then a product with higher content is obtained through extraction or ion exchange enrichment, but the problems of impurity removal and product purity in the extraction process cannot be effectively solved. The detection extraction integrated chip is used for extracting valuable metals from the red mud, so that the dosage of an extracting agent is effectively reduced, a higher enrichment ratio can be achieved, and the method has an important significance for realizing red mud recycling to the maximum extent.

Disclosure of Invention

The invention provides a parallel integrated chip for detecting and extracting valuable elements in red mud, which is used for solving the problem of comprehensive utilization of red mud resources and reducing the pollution to the environment.

A parallel integrated chip for detecting and extracting valuable elements in red mud is characterized by comprising: a top cover, a real-time detection microfluidic chip, a dual psi-type channel microfluidic chip and a base;

the base, the double psi-shaped channel microfluidic chip, the instant detection microfluidic chip and the top cover are sequentially connected in an overlapping manner from bottom to top;

preferably, a waste liquid pool is arranged in the middle of the base, and one side of the waste liquid pool is communicated with the third-stage liquid outlet;

preferably, the middle part of the double psi-shaped channel microfluidic chip is a metal ion extraction area; the left side of the metal ion extraction area is connected with an extractant liquid inlet, and the right side of the metal ion extraction area is connected with an extractant collecting port; the left end and the right end of the metal ion extraction area are respectively provided with a secondary sample liquid inlet and a secondary sample liquid outlet; the diameters of the liquid inlet and the liquid outlet are 0.7mm, and the width and the depth of the channel are both 0.4 mm; the inclination angle is 45 degrees; the length of the channel of the metal ion extraction area is 14mm, and the width of the channel is 0.6 mm;

preferably, the middle part of the instant detection micro-fluidic chip is provided with a metal ion detection area, and the left side of the metal ion detection area is respectively provided with a sample primary liquid inlet II and a detection agent liquid inlet II, wherein the sample primary liquid inlet II is communicated with a sample secondary liquid inlet; a primary liquid outlet is formed in the right side of the metal ion detection area, and a capillary pump is arranged on the right side of the metal ion detection area; the diameters of the liquid inlet and the liquid outlet are 0.7 mm; the length of a detection channel of the metal ion detection area is 11mm, and the width of the detection channel is 0.8 mm; the length of the capillary pump is 7mm, and the width of the capillary pump is 1 mm;

preferably, the top cover is provided with a first sample first-stage liquid inlet and a first detection agent liquid inlet.

A detection method for detecting and extracting parallel integrated chips of valuable elements in red mud is characterized by comprising the following steps:

s1: introducing a red mud sample into a detection chip from a primary sample liquid inlet, introducing a metal ion detection agent into the detection chip from a detection agent liquid inlet, controlling an inlet valve body and an outlet valve body through a microcomputer to enable the red mud sample and the metal ion detection agent to fully react, and discharging detected waste liquid into a waste liquid pool through a primary liquid outlet;

s2: after the detection is finished, closing the primary liquid inlet of the sample, opening the secondary liquid inlet of the sample, introducing a target ion extracting agent from the liquid inlet of the extracting agent, and controlling the flow velocity of the inlet to enable the extracting agent and the red mud sample to form a stable laminar flow in the metal ion extraction area;

s3: because the concentration of the target ions of the extractant is lower than that of the red mud sample, the extractant extracts the target ions in the red mud sample, the extractant rich in the target ions is collected from the extractant collecting port, and the extracted waste liquid flows into the waste liquid pool from the secondary liquid outlet;

s4: after the extraction experiment was accomplished, the waste liquid was collected from tertiary liquid outlet and is retrieved, avoids the waste liquid polluted environment.

The invention has the beneficial effects that:

1) the instant detection microfluidic chip can be paused and started by controlling the inlet and outlet of the channel by using the microcomputer, can ensure that a sample and a detection agent fully react, and can detect the sample for multiple times to determine target ions.

2) The detection module can provide theoretical basis for extraction links, selects a proper extracting agent aiming at target ions, and forms a laminar flow state in the microchannel, thereby effectively reducing the use of the extracting agent and improving the enrichment ratio.

3) The detection extraction parallel type integrated chip has expandability, can be used for extracting valuable elements in a red mud sample, and can also be used for detecting and extracting other solutions containing various ions. Meanwhile, the multi-stage detection extraction modules can be connected in parallel to extract various metal ions in the solution.

Drawings

FIG. 1 is a schematic view of a parallel integrated chip for detecting and extracting valuable metal ions in red mud according to the present invention;

FIG. 2 is a schematic diagram of a top cover structure of an integrated chip;

FIG. 3 is a schematic diagram of a structure of a real-time detection microfluidic chip;

FIG. 4 is a schematic diagram of a microfluidic chip with two psi-type channels;

FIG. 5 is a schematic diagram of an integrated chip base structure;

the structure names represented by the respective reference numerals in the drawings are:

1-top cover, 1-1-first sample liquid inlet I, 1-2-first detector liquid inlet I, 2-instant detection microfluidic chip, 2-1-first sample liquid inlet II, 2-2-second detector liquid inlet II, 2-3-metal ion detection zone, 2-4-capillary pump, 2-5-first liquid outlet, 2-6-second sample liquid inlet, 3-double psi type channel microfluidic chip, 3-1-extractant liquid inlet, 3-2-metal ion extraction zone, 3-3-second liquid outlet, 3-4-extractant collection port, 3-5-second sample liquid inlet, 4-base, 4-1-waste liquid pool and 4-2-third liquid outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A parallel integrated chip for detecting and extracting valuable elements in red mud is characterized by comprising: the device comprises a top cover (1), a real-time detection microfluidic chip (2), a double psi-shaped channel microfluidic chip (3) and a base (4);

the base (4), the double psi-shaped channel microfluidic chip (3), the instant detection microfluidic chip (2) and the top cover (1) are sequentially connected in an overlapping manner from bottom to top;

preferably, a waste liquid pool (4-1) is arranged in the middle of the upper part of the base (4), and one side of the waste liquid pool (4-1) is communicated with a third-stage liquid outlet (4-2);

preferably, the middle part of the double psi-shaped channel microfluidic chip (3) is provided with a metal ion extraction area (3-2); the left side of the metal ion extraction area (3-2) is connected with an extractant liquid inlet (3-1), and the right side is connected with an extractant collecting port (3-4); the left end and the right end of the metal ion extraction area (3-2) are respectively provided with a secondary sample liquid inlet (3-5) and a secondary liquid outlet (3-3); the diameters of the liquid inlet and the liquid outlet are 0.7mm, and the width and the depth of the channel are both 0.4 mm; the inclination angle is 45 degrees; the length of the channel of the metal ion extraction area is 14mm, and the width of the channel is 0.6 mm;

preferably, the middle part of the instant detection microfluidic chip (2) is provided with a metal ion detection area (2-3), the left side of the metal ion detection area (2-3) is respectively provided with a sample primary liquid inlet II (2-1) and a detection agent liquid inlet II (2-2), and the sample primary liquid inlet (2-1) is communicated with a sample secondary liquid inlet (2-6); a primary liquid outlet (2-5) is formed in the right side of the metal ion detection area (2-3), and a capillary pump (2-4) is arranged on the right side; the diameters of the liquid inlet and the liquid outlet are 0.7 mm; the length of a detection channel of the metal ion detection area is 11mm, and the width of the detection channel is 0.8 mm; the length of the capillary pump is 7mm, and the width of the capillary pump is 1 mm;

preferably, the top cover (1) is provided with a first-level sample liquid inlet (1-1) and a first detection agent liquid inlet (1-2).

Example 2

The detection of the red mud sample by utilizing the valuable element detection extraction parallel integrated chip in the red mud prepared in the embodiment 1 comprises the following steps:

s1: introducing a red mud sample into a detection chip from a first-stage sample inlet (1-1), introducing a metal ion detection agent into the detection chip from a first-stage sample inlet (1-2), controlling an inlet valve body and an outlet valve body by a microcomputer to enable the red mud sample to fully react with the metal ion detection agent, and discharging detected waste liquid into a waste liquid pool (4-1) through a first-stage liquid outlet (2-5);

s2: after the detection is finished, closing the second sample primary liquid inlet (2-1), opening the second sample secondary liquid inlet (2-6), simultaneously introducing a target ion extracting agent from the extracting agent liquid inlet (3-1), and controlling the flow velocity of inlets to enable the extracting agent and the red mud sample to form a stable laminar flow in the metal ion extraction area (3-2);

s3: because the concentration of the target ions of the extractant is lower than that of the red mud sample, the extractant extracts the target ions in the red mud sample, the extractant rich in the target ions is collected from an extractant collecting port (3-4), and the extracted waste liquid flows into a waste liquid pool (4-1) from a secondary liquid outlet (3-3);

s4: after the extraction experiment is finished, the waste liquid is collected and recovered from the three-stage liquid outlet (4-2), so that the environment pollution caused by the waste liquid is avoided.

From example 2, it was found that the extraction of the target metal ions by the extraction chip was carried out at an extraction phase flow rate of 1X 10^-3m/s, the flow rate of the red mud sample is 0.5 multiplied by 10^-3Under the condition of m/s, the extraction efficiency of the target metal ions can reach 98.31%, and further experiments show that the extraction efficiency is further improved and can reach 99.83% after the speed ratio of 1:2 to 1:5 is changed.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.