A method for recovering building ceramic raw materials from lepidolite beneficiation tailings

Abstract

The present invention provides a method for recovering building ceramic raw materials from lepidolite beneficiation tailings. The method comprises: preparing a prefabricated slurry; stirring the prefabricated slurry and then settling and desludging the prefabricated slurry to obtain ecological ceramic raw materials and pre-selected slurry; placing the pre-selected slurry, sodium hydroxide, water glass, and sodium hexametaphosphate into a roughing flotation cell, and adding a collector and a frother for roughing to obtain roughing tailings; adding a collector for a first cleaning to obtain a first cleaned tailing; adding a collector for a second cleaning to obtain a second cleaned tailing and building ceramic raw materials; placing the roughing tailings, the first cleaned tailings, and the second cleaned tailings into a scavenging flotation cell, and then adding water glass and sodium hexametaphosphate for scavenging to obtain lepidolite concentrate and scavenged tailings; and returning the scavenged tailings to the roughing flotation cell for a cyclic flotation operation. The present invention employs a "one roughing, two cleaning, one scavenging" flotation process, which is simple, generates no waste, and has excellent environmental value.

Description

Technical Field

[0001] The invention belongs to the technical field of separation and beneficiation, and in particular relates to a method for recovering building ceramic raw materials from lepidolite beneficiation tailings. Background Art

[0002] China is rich in lithium resources, including abundant lithium ore, with proven reserves of 2.6 million tons of lithium oxide (Li2O). The lithium ore resources in Yichun are semi-weathered, with fine-grained minerals comprising approximately 15-20% of the raw ore. In traditional mineral processing, the large amount of fine-grained minerals can hinder the recovery of lepidolite in the main process. Therefore, desludging and grading of the incoming ore are performed before the main process.

[0003] In the existing lepidolite beneficiation process, the large specific surface area of ​​the fine minerals in the sludge after cyclone desludging makes it easy for different mineral particles to agglomerate. Mechanical inclusions and sludge cover seriously reduce flotation selectivity, resulting in low concentrate grade and high reagent consumption. Conventional flotation processes are unable to efficiently recover these fine-grained lepidolite, and mineral processing plants are generally helpless in recovering fine-grained lepidolite minerals. Due to the above reasons, the lepidolite (grade between 0.35% and 0.55%) in the lepidolite fine mud (fine mud accounts for 15% to 25% of the original ore) in Yichun area is currently directly discarded as tailings and sold as low-end ceramic raw materials. This not only wastes limited lepidolite mineral resources, but also produces a large amount of mud as tailings, which has an adverse impact on the surrounding environment of the mine and increases the cost of tailings processing for enterprises.

[0004] Therefore, how to efficiently utilize low-grade, finely embedded, and complex micro-grained lepidolite minerals is an urgent problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The present invention uses lepidolite tailings as raw material, addresses the current technical problem of difficulty in efficiently recovering fine-grained lepidolite minerals, and realizes a waste-free production process with low production cost, high recovery index and strong adaptability through a flotation scheme combining pre-desliming with roughing, scavenging and two rounds of cleaning.

[0006] In order to achieve the above-mentioned object, the present invention provides a method for recovering building ceramic raw materials from lepidolite beneficiation tailings, the method comprising: sending the lepidolite beneficiation tailings to a stirring tank, and adjusting the pulp concentration to obtain a prefabricated pulp; pumping the prefabricated pulp in the stirring tank into a desludging device, stirring the prefabricated pulp and then settling and desludging to obtain demineralized and settled pulp, extracting the demineralized from the desludging device and performing filter press to obtain ecological ceramic raw materials, and collecting the settled pulp from the desludging device. The pre-selected pulp is extracted from the mud device to obtain the pre-selected pulp; the pre-selected pulp, sodium hydroxide, water glass and sodium hexametaphosphate are put into the roughing flotation machine for stirring, and after sufficient stirring, a collector and a frother are added to the roughing flotation machine, and stirring is continued, and aeration and scraping are performed for roughing. During the roughing, the foamed pulp in the roughing flotation machine tank is scraped out to obtain the roughing tailings; after the roughing is completed, a collector is added to the roughing flotation machine, and stirring is sufficient, and then aeration and scraping are performed for the first selection, and the foamed pulp in the roughing flotation machine tank is scraped out during the selection. Scrape out to obtain the first selected tailings; after the first selection is completed, add a collector to the roughing flotation machine, stir it thoroughly, and then aerate and scrape bubbles to perform the second selection. During the selection, the foam pulp in the roughing flotation machine tank is scraped out to obtain the second selected tailings. After the second selection is completed, the product in the roughing flotation machine tank is the building ceramic raw material; the roughing tailings are added to the scavenging flotation machine for scavenging, and the adding of the roughing tailings to the scavenging flotation machine for scavenging specifically includes: adding the first The selected tailings and the second selected tailings are then mixed with the roughing tailings to obtain a mixed pulp, and then water glass and sodium hexametaphosphate are added to the scavenging flotation machine to fully stir the mixed pulp with the water glass and the sodium hexametaphosphate, and then aeration and foaming are performed to perform scavenging. During scavenging, the foam pulp in the scavenging flotation machine tank is scraped out to obtain lepidolite concentrate. After the scavenging is completed, the product in the scavenging flotation machine tank is the scavenging tailings, and the scavenging tailings are returned to the roughing flotation machine for a circulating flotation operation.

[0007] As a further technical solution of the present invention, the step of sending the lepidolite ore dressing tailings to a stirring tank and adjusting the slurry concentration to obtain the prefabricated slurry includes: sending the lepidolite ore dressing tailings to the stirring tank with a pump, and injecting clean water into the stirring tank through a clean water pipe to adjust the slurry concentration to obtain the prefabricated slurry.

[0008] As a further technical solution of the present invention, the step of sending the lepidolite beneficiation tailings to a stirring tank and adjusting the slurry concentration to obtain the prefabricated slurry further comprises: the slurry concentration is 15%-30%.

[0009] As a further technical solution of the present invention, during the process of stirring the prefabricated slurry, the stirring speed is 2000r / min-3000r / min, the stirring time is 15min-25min, and the sedimentation time is 4min-8min.

[0010] As a further technical solution of the present invention, the step of placing the pre-selected ore pulp, sodium hydroxide, water glass and sodium hexametaphosphate into a roughing flotation machine for stirring comprises: the amount of the sodium hydroxide is 100g / t-600g / t, the amount of the water glass is 1000g / t-1500g / t, and the amount of the sodium hexametaphosphate is 100g / t-400g / t.

[0011] As a further technical solution of the present invention, the step of adding a collector and a frother to the roughing flotation machine after sufficient stirring comprises: the collector is an anionic and cationic collector, and the amount of the collector is 200g / t-500g / t.

[0012] As a further technical solution of the present invention, adding a collector and a foaming agent to the roughing flotation machine after sufficient stirring further comprises: the foaming agent comprises one of kerosene, No. 2 oil and BK201, and the amount of the foaming agent is 20g / t-40g / t.

[0013] As a further technical solution of the present invention, adding a collector to the roughing flotation machine after the roughing is completed includes: the collector is an anionic and cationic collector, and the amount of the collector is 75g / t-180g / t.

[0014] As a further technical solution of the present invention, adding a collector to the roughing flotation machine after the first concentration is completed includes: the collector is an anionic and cationic collector, and the amount of the collector is 25g / t-60g / t.

[0015] As a further technical solution of the present invention, the step of adding water glass and sodium hexametaphosphate to the scavenging flotation machine comprises: the amount of water glass is 500g / t-750g / t, and the amount of sodium hexametaphosphate is 100g / t-225g / t.

[0016] Beneficial effects: The present invention proposes a method for recovering building ceramic raw materials from lepidolite beneficiation tailings, using lepidolite beneficiation tailings as the base raw material, and using sodium hydroxide, water glass, and sodium hexametaphosphate as adjusters to cooperate with collectors and frothers for reverse flotation to recover building ceramic raw materials, including slurry adjustment, desludging, roughing, first concentration, second concentration, and scavenging. By combining pre-desludging with roughing, scavenging, and a flotation process with two concentrations, the main product obtained is a high-quality building ceramic raw material, and the by-products are ecological ceramic raw materials and fine-grained lepidolite concentrate with high utilization value. The method can also reduce the sludge in the tailings produced, thereby reducing the harm of lepidolite beneficiation tailings to the environment. The present invention has a simple process, low production cost, high recovery index, strong adaptability, and no waste generation. It can efficiently recover and comprehensively utilize low-grade, finely embedded, and complex micro-grained lepidolite minerals. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 The method for recovering building ceramic raw materials from lepidolite beneficiation tailings in the embodiment of the present invention is as follows Figure 1 ;

[0019] Figure 2 The process of the method for recovering building ceramic raw materials from lepidolite beneficiation tailings in the embodiment of the present invention is as follows Figure 2 . DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0021] Throughout this specification, unless otherwise specified, the terms used herein should be understood as having the same meaning as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention belongs. In the event of any conflict, the present specification shall prevail.

[0022] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0023] Example 1

[0024] like Figure 1-2 As shown, the present embodiment provides a method for recovering building ceramic raw materials from lepidolite beneficiation tailings, the method comprising: S101 sending the lepidolite beneficiation tailings to a stirring tank, and adjusting the pulp concentration to obtain a prefabricated pulp; S102 pumping the prefabricated pulp in the stirring tank into a desludging device, stirring the prefabricated pulp and then settling and desludging to obtain demineralized and settled pulp, extracting the demineralized from the desludging device and performing filter press to obtain ecological ceramic raw materials, and removing the settled pulp from the desludging device. The pre-selected pulp is extracted from the device; S103 puts the pre-selected pulp, sodium hydroxide, water glass and sodium hexametaphosphate into the roughing flotation machine for stirring, and after sufficient stirring, adds a collector and a frother to the roughing flotation machine, continues stirring, and performs roughing by aerating and scraping bubbles. During the roughing, the foam pulp in the roughing flotation machine tank is scraped out to obtain roughing tailings; S104 adds a collector to the roughing flotation machine after the roughing is completed, stirs fully, and then performs the first selection by aerating and scraping bubbles. During the selection, the foam pulp in the roughing flotation machine tank is scraped out to obtain roughing tailings. Slurry is scraped out to obtain the first selected tailings; after the first selection is completed in S105, a collector is added to the roughing flotation machine, fully stirred, and then aerated and scraped bubbles are added for the second selection. During the selection, the foamed slurry in the roughing flotation machine tank is scraped out to obtain the second selected tailings. After the second selection is completed, the product in the roughing flotation machine tank is the building ceramic raw material; S106, the roughing tailings are added to the scavenging flotation machine for scavenging. The adding the roughing tailings to the scavenging flotation machine for scavenging specifically includes: adding the scavenging flotation machine to the scavenging flotation machine. The first concentrated tailings and the second concentrated tailings are added and then mixed with the roughing tailings to obtain a mixed pulp. Water glass and sodium hexametaphosphate are then added to the scavenging flotation machine to fully stir the mixed pulp with the water glass and the sodium hexametaphosphate. Then, aeration and foaming are performed to perform scavenging. During scavenging, the foam pulp in the scavenging flotation machine tank is scraped out to obtain lepidolite concentrate. After the scavenging is completed, the product in the scavenging flotation machine tank is the scavenging tailings, which are returned to the roughing flotation machine for cyclic flotation operation.

[0025] Specifically, the present invention proposes a method for recovering building ceramic raw materials from lepidolite beneficiation tailings. The method uses lepidolite beneficiation tailings as the base raw material, and uses sodium hydroxide, water glass, and sodium hexametaphosphate as regulators to synergize with collectors and frothers for reverse flotation to recover the building ceramic raw materials. The method includes slurry mixing, desludging, roughing, primary concentrating, secondary concentrating, and scavenging. By combining pre-desludging with roughing, scavenging, and a flotation process with two concentrations, the main product is a high-quality building ceramic raw material, and the by-products are high-value ecological ceramic raw materials and fine-grained lepidolite concentrate. Furthermore, the method can reduce the amount of sludge in the tailings and the environmental hazards posed by the lepidolite beneficiation tailings. The method of the present invention has a simple process, low production cost, high recovery index, strong adaptability, and no waste generation. It can efficiently recover and comprehensively utilize low-grade, finely embedded, and complex micro-grained lepidolite minerals.

[0026] It should be noted that the steps S104, S105, and S106 in the above embodiment can be performed sequentially. Of course, as another embodiment of the present invention, S106 in the present invention can be performed simultaneously with S104 and S105, that is, the first cleaned tailings in the first cleaning process can be scraped out and then placed in a scavenging flotation cell for scavenging, and the second cleaned tailings in the second cleaning process can be scraped out and then placed in a scavenging flotation cell for mixing with the rougher tailings and the first cleaned tailings for scavenging.

[0027] In addition, in the present invention, returning the scavenging tailings to the roughing flotation machine for a circulating flotation operation includes returning the scavenging tailings to the roughing flotation machine in S103, so that the scavenging tailings, the pre-selected slurry, sodium hydroxide, water glass and sodium hexametaphosphate are stirred in the roughing flotation machine, adding a collector and a frother to the roughing flotation machine after sufficient stirring, continuing stirring, and aerating and scraping bubbles to perform roughing, scraping out the foamed slurry in the roughing flotation machine tank during roughing to obtain roughing tailings, and performing subsequent operation steps S104, S105 and S106 on the roughing tailings in sequence.

[0028] In some possible embodiments, the step of conveying the lepidolite beneficiation tailings to a stirring tank and adjusting the slurry concentration to obtain a prefabricated slurry includes: conveying the lepidolite beneficiation tailings to a stirring tank with a pump, and injecting clean water into the stirring tank through a clean water pipe to adjust the slurry concentration to obtain the prefabricated slurry: the slurry concentration is 15%-30%.

[0029] Those skilled in the art will appreciate that by pumping the lithium mica beneficiation tailings into a stirring tank and injecting clean water into the stirring tank through a clean water pipe to adjust the slurry concentration to 15%-30%, the amount of reagents used can be reduced, the cost can be reduced, and the appropriate slurry concentration can improve the recovery rate of the prefabricated slurry and the product quality.

[0030] In some possible implementations, during the stirring of the prefabricated slurry, the stirring speed is 2000 r / min-3000 r / min, the stirring time is 15 min-25 min, and the sedimentation time is 4 min-8 min.

[0031] This is because, by controlling the stirring speed to 2000r / min-3000r / min, the stirring time to 15min-25min, and the sedimentation time to 4min-8min, the recovery index of the by-product ecological ceramic raw materials can be controlled within the optimal range. In addition, pre-demudging of the prefabricated slurry is beneficial to reduce the harm of fine mud to the subsequent flotation process and improve the sorting efficiency. The ecological ceramic raw materials can be obtained by filter pressing the removed secondary fine mud on the upper layer, and the settled slurry on the lower layer can be used for the next roughing operation.

[0032] In some possible embodiments, the step of placing the pre-selected ore pulp, sodium hydroxide, water glass, and sodium hexametaphosphate into a roughing flotation machine for stirring includes: the amount of sodium hydroxide is 100g / t-600g / t, the amount of water glass is 1000g / t-1500g / t, and the amount of sodium hexametaphosphate is 100g / t-400g / t.

[0033] This is because by adding sodium hydroxide as a pH adjuster and controlling its dosage to 100g / t-600g / t, the pH value of the pre-selected ore pulp can be changed, so that the minerals in the pre-selected ore pulp can be floated out under appropriate pH conditions; by adding adjusting agents water glass and sodium hexametaphosphate, and controlling the dosage of water glass to 1000g / t-1500g / t and the dosage of sodium hexametaphosphate to 100g / t-400g / t, competitive adsorption with the collector can be formed on the mineral surface, inhibiting the adsorption of the collector on the mineral surface, thereby changing the hydrophilicity of the mineral, and also increasing the electric potential of the fine mud surface. When the fine muds approach each other, they repel each other due to the same electrical properties, thereby increasing the dispersibility of the mineral mud and preventing the fine mud from non-selectively agglomerating.

[0034] In some possible implementations, the adding of a collector and a frother into the roughing flotation machine after sufficient stirring includes: the collector is an anionic or cationic collector, and the amount of the collector is 200 g / t-500 g / t.

[0035] Those skilled in the art will understand that by using an anionic and cationic collector as the collector, in a mixed anionic and cationic collector system, the cationic collector and the anionic collector are co-adsorbed on the mineral surface, which can enhance the hydrophobicity of the mineral surface, increase the roughing recovery rate of the pre-selected slurry, and cause the floating mineral particles to adhere to the bubbles. By using the collector in an amount of 200g / t-500g / t, it is possible to avoid insufficient collector dosage resulting in insufficient hydrophobicity of the mineral and decreased recovery rate, and excessive collector dosage resulting in decreased quality of the roughing concentrate in the roughing flotation machine tank.

[0036] In some possible implementations, adding a collector and a frother to the roughing flotation machine after sufficient stirring further comprises: the frother comprises one of kerosene, No. 2 oil and BK201, and the amount of the frother is 20g / t-40g / t.

[0037] Those skilled in the art will appreciate that by adding a foaming agent including one of kerosene, No. 2 oil and BK201, a foam layer capable of floating minerals can be generated in the pre-selected slurry during roughing of the pre-selected slurry. By using the foaming agent in an amount of 20 g / t to 40 g / t, it is possible to avoid poor foam stability caused by insufficient foaming agent and the "tank running" phenomenon caused by excessive foaming agent.

[0038] In some possible implementations, adding a collector to the roughing flotation machine after the roughing is completed includes: the collector is an anionic and cationic collector, and the amount of the collector is 75g / t-180g / t.

[0039] This is because the collector added to the roughing flotation machine after the roughing is completed includes: the collector is an anionic and cationic collector, so that during the first concentration, in the anionic and cationic mixed collector system, the cationic collector and the anionic collector are co-adsorbed on the mineral surface, which can enhance the hydrophobicity of the mineral surface, increase the first concentration recovery rate of the roughing concentrate, and make the floating mineral particles adhere to the bubbles. By using the collector in an amount of 75g / t-180g / t, it is possible to avoid insufficient collector dosage resulting in insufficient mineral hydrophobicity and reduced recovery rate, and excessive collector dosage resulting in reduced concentrate quality in the roughing flotation machine tank.

[0040] In some possible implementations, adding a collector to the roughing flotation machine after the first concentration is completed includes: the collector is an anionic and cationic collector, and the amount of the collector is 25g / t-60g / t.

[0041] This is because the collector added to the roughing flotation machine after the roughing is completed includes: the collector is an anionic and cationic collector, so that during the second concentration, in the anionic and cationic mixed collector system, the cationic collector and the anionic collector are co-adsorbed on the mineral surface, which can enhance the hydrophobicity of the mineral surface, increase the second concentration recovery rate of the first concentration concentrate, and make the floating mineral particles adhere to the bubbles. By using the collector in an amount of 25g / t-60g / t, the recovery index of the by-product ceramic raw materials can be controlled within the optimal range, so that the mica content in the ceramic raw materials is low and the utilization value is high.

[0042] In some possible implementations, the adding of water glass and sodium hexametaphosphate to the scavenger flotation machine includes: the amount of water glass is 500g / t-750g / t, and the amount of sodium hexametaphosphate is 100g / t-225g / t.

[0043] This is because, when the roughing tailings obtained by roughing, the first concentrated tailings obtained by the first concentration, and the second concentrated tailings obtained by the second concentration are scavenged, by controlling the amount of water glass to 500g / t-750g / t and the amount of sodium hexametaphosphate to 100g / t-225g / t, the recovery index of the by-product lepidolite concentrate can be controlled within the optimal range.

[0044] In order to further illustrate the technical solution of the present application in detail to support the technical problem to be solved by the present application, the method of recovering building ceramic raw materials from lepidolite beneficiation tailings is specifically illustrated below, such as Examples 2-7.

[0045] Example 2

[0046] This embodiment recovers building ceramic raw materials from lepidolite beneficiation tailings through the following steps:

[0047] Slurry adjustment: the lepidolite beneficiation tailings are pumped into a stirring tank, and clean water is injected into the stirring tank through a clean water pipe to adjust the slurry concentration to 15% to obtain a prefabricated slurry;

[0048] Desliming: The prefabricated slurry in the stirring tank is pumped into a desliming device, the prefabricated slurry is stirred and then settled for desliming, the stirring speed during the stirring process is 2000 r / min, the stirring time is 15 min, and the settling time is 4 min; demineralized and settled slurry are obtained, the demineralized slurry is extracted from the desliming device and subjected to filter press to obtain ecological ceramic raw materials, and the settled slurry is extracted from the desliming device to obtain pre-selected slurry;

[0049] Roughing: the pre-selected ore pulp, sodium hydroxide, water glass and sodium hexametaphosphate are placed in a roughing flotation machine for stirring, wherein the amount of the sodium hydroxide is 100 g / t, the amount of the water glass is 1000 g / t, and the amount of the sodium hexametaphosphate is 100 g / t; after sufficient stirring, 200 g / t of anionic and cationic collectors and 20 g / t of kerosene foaming agent are added to the roughing flotation machine, stirring is continued, and roughing is performed by aeration and scraping. During the roughing, the foamed ore pulp in the roughing flotation machine tank is scraped out to obtain roughing tailings. After the roughing is completed, the product in the roughing flotation machine tank is the roughing concentrate;

[0050] First concentration: After the roughing is completed, 75g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped to perform the first concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the first concentrated tailings. After the concentration is completed, the product in the roughing flotation machine tank is the first concentrated concentrate;

[0051] Second concentration: After the first concentration is completed, 25g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped for the second concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the second concentrated tailings. After the second concentration is completed, the product in the roughing flotation machine tank is the building ceramic raw material;

[0052] Scavenging: adding the rougher tailings to a scavenging flotation machine for scavenging, wherein adding the rougher tailings to the scavenging flotation machine for scavenging specifically comprises: adding the first concentrated tailings and the second concentrated tailings to the scavenging flotation machine, and then mixing them with the rougher tailings to obtain a mixed pulp, and then adding water glass and sodium hexametaphosphate to the scavenging flotation machine, wherein the amount of the water glass is 500g / t and the amount of the sodium hexametaphosphate is 100g / t, so that the mixed pulp is fully stirred with the water glass and the sodium hexametaphosphate, and then aerating and scraping bubbles are used for scavenging, wherein the foamed pulp in the scavenging flotation machine tank is scraped out during scavenging to obtain lepidolite concentrate, and the product in the scavenging flotation machine tank after the scavenging is completed is the scavenging tailings, and the scavenging tailings are returned to the rougher flotation machine for cyclic flotation operation.

[0053] In this embodiment, the amount of mica minerals in the obtained ceramic raw material is 2%, and the grade of the by-product lepidolite concentrate Li2O is 1.47%.

[0054] Example 3

[0055] This embodiment recovers building ceramic raw materials from lepidolite beneficiation tailings through the following steps:

[0056] Slurry adjustment: the lepidolite beneficiation tailings are pumped into a stirring tank, and clean water is injected into the stirring tank through a clean water pipe to adjust the slurry concentration to 15% to obtain a prefabricated slurry;

[0057] Desliming: The prefabricated slurry in the stirring tank is pumped into a desliming device, the prefabricated slurry is stirred and then settled for desliming, the stirring speed during the stirring process is 2500 r / min, the stirring time is 20 min, and the settling time is 6 min; demineralized and settled slurry are obtained, the demineralized slurry is extracted from the desliming device and subjected to filter press to obtain ecological ceramic raw materials, and the settled slurry is extracted from the desliming device to obtain pre-selected slurry;

[0058] Roughing: The pre-selected ore pulp, sodium hydroxide, water glass and sodium hexametaphosphate are placed in a roughing flotation machine for stirring, wherein the amount of sodium hydroxide is 200 g / t, the amount of water glass is 1100 g / t, and the amount of sodium hexametaphosphate is 150 g / t; after sufficient stirring, 250 g / t of anionic and cationic collectors and 40 g / t of kerosene foaming agent are added to the roughing flotation machine, stirring is continued, and roughing is performed by aeration and scraping. During the roughing, the foamed ore pulp in the roughing flotation machine tank is scraped out to obtain roughing tailings. After the roughing is completed, the product in the roughing flotation machine tank is the roughing concentrate;

[0059] First concentration: After the roughing is completed, 85g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped to perform the first concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the first concentrated tailings. After the concentration is completed, the product in the roughing flotation machine tank is the first concentrated concentrate;

[0060] Second concentration: After the first concentration is completed, 28g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped for the second concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the second concentrated tailings. After the second concentration is completed, the product in the roughing flotation machine tank is the building ceramic raw material;

[0061] Scavenging: adding the rougher tailings to a scavenging flotation machine for scavenging, wherein adding the rougher tailings to the scavenging flotation machine for scavenging specifically comprises: adding the first concentrated tailings and the second concentrated tailings to the scavenging flotation machine, and then mixing them with the rougher tailings to obtain a mixed slurry; then adding water glass and sodium hexametaphosphate to the scavenging flotation machine, wherein the amount of the water glass is 550 g / t and the amount of the sodium hexametaphosphate is 125 g / t; fully stirring the mixed slurry with the water glass and the sodium hexametaphosphate; and then aerating and scraping bubbles for scavenging. During scavenging, the foamed slurry in the scavenging flotation machine tank is scraped out to obtain lepidolite concentrate. After the scavenging is completed, the product in the scavenging flotation machine tank is the scavenging tailings, and the scavenging tailings are returned to the rougher flotation machine for a circulating flotation operation.

[0062] In this embodiment, the content of mica minerals in the obtained ceramic raw material is 1.67%, and the grade of the by-product lepidolite concentrate Li2O is 1.58%.

[0063] Example 4

[0064] This embodiment recovers building ceramic raw materials from lepidolite beneficiation tailings through the following steps:

[0065] Slurry adjustment: the lepidolite beneficiation tailings are pumped into a stirring tank, and clean water is injected into the stirring tank through a clean water pipe to adjust the slurry concentration to 20% to obtain a prefabricated slurry;

[0066] Desliming: The prefabricated slurry in the stirring tank is pumped into a desliming device, the prefabricated slurry is stirred and then settled for desliming, the stirring speed during the stirring process is 2500 r / min, the stirring time is 20 min, and the settling time is 6 min; demineralized and settled slurry are obtained, the demineralized slurry is extracted from the desliming device and subjected to filter press to obtain ecological ceramic raw materials, and the settled slurry is extracted from the desliming device to obtain pre-selected slurry;

[0067] Roughing: the pre-selected ore pulp, sodium hydroxide, water glass and sodium hexametaphosphate are placed in a roughing flotation machine for stirring, wherein the amount of the sodium hydroxide is 300 g / t, the amount of the water glass is 1200 g / t, and the amount of the sodium hexametaphosphate is 200 g / t; after sufficient stirring, 300 g / t of anionic and cationic collectors and 40 g / t of No. 2 oil foaming agent are added to the roughing flotation machine, stirring is continued, and roughing is performed by aeration and scraping. During the roughing, the foamed ore pulp in the roughing flotation machine tank is scraped out to obtain roughing tailings. After the roughing is completed, the product in the roughing flotation machine tank is the roughing concentrate;

[0068] First concentration: After the roughing is completed, 100g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped to perform the first concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the first concentrated tailings. After the concentration is completed, the product in the roughing flotation machine tank is the first concentrated concentrate;

[0069] Second concentration: After the first concentration is completed, 30g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped for the second concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the second concentrated tailings. After the second concentration is completed, the product in the roughing flotation machine tank is the building ceramic raw material;

[0070] Scavenging: adding the rougher tailings to a scavenging flotation machine for scavenging, wherein adding the rougher tailings to the scavenging flotation machine for scavenging specifically comprises: adding the first concentrated tailings and the second concentrated tailings to the scavenging flotation machine, and then mixing them with the rougher tailings to obtain a mixed pulp; then adding water glass and sodium hexametaphosphate to the scavenging flotation machine, wherein the amount of the water glass is 600 g / t and the amount of the sodium hexametaphosphate is 150 g / t; fully stirring the mixed pulp with the water glass and the sodium hexametaphosphate; and then aerating and scraping for scavenging. During scavenging, the foamed pulp in the scavenging flotation machine tank is scraped out to obtain lepidolite concentrate. After the scavenging is completed, the product in the scavenging flotation machine tank is the scavenging tailings, and the scavenging tailings are returned to the rougher flotation machine for a cyclic flotation operation.

[0071] In this embodiment, the amount of mica mineral in the obtained building ceramic raw material is 0.8%, and the grade of the by-product lepidolite concentrate Li2O is 1.94%.

[0072] Example 5

[0073] This embodiment recovers building ceramic raw materials from lepidolite beneficiation tailings through the following steps:

[0074] Slurry adjustment: The lepidolite beneficiation tailings are pumped into a stirring tank, and clean water is injected into the stirring tank through a clean water pipe to adjust the slurry concentration to 25% to obtain a prefabricated slurry;

[0075] Desliming: The prefabricated slurry in the stirring tank is pumped into a desliming device, the prefabricated slurry is stirred and then settled for desliming, the stirring speed during the stirring process is 3000 r / min, the stirring time is 25 min, and the settling time is 8 min; demineralized and settled slurry are obtained, the demineralized slurry is extracted from the desliming device and subjected to filter press to obtain ecological ceramic raw materials, and the settled slurry is extracted from the desliming device to obtain pre-selected slurry;

[0076] Roughing: the pre-selected ore pulp, sodium hydroxide, water glass and sodium hexametaphosphate are placed in a roughing flotation machine for stirring, wherein the amount of sodium hydroxide is 400 g / t, the amount of water glass is 1300 g / t, and the amount of sodium hexametaphosphate is 250 g / t; after sufficient stirring, 350 g / t of anionic and cationic collectors and 20 g / t of No. 2 oil foaming agent are added to the roughing flotation machine, stirring is continued, and roughing is performed by aeration and scraping. During the roughing, the foamed ore pulp in the roughing flotation machine tank is scraped out to obtain roughing tailings. After the roughing is completed, the product in the roughing flotation machine tank is the roughing concentrate;

[0077] First concentration: After the roughing is completed, 110g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped to perform the first concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the first concentrated tailings. After the concentration is completed, the product in the roughing flotation machine tank is the first concentrated concentrate;

[0078] Second concentration: After the first concentration is completed, 35g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped for the second concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the second concentrated tailings. After the second concentration is completed, the product in the roughing flotation machine tank is the building ceramic raw material;

[0079] Scavenging: adding the rougher tailings to a scavenging flotation machine for scavenging, wherein adding the rougher tailings to the scavenging flotation machine for scavenging specifically comprises: adding the first concentrated tailings and the second concentrated tailings to the scavenging flotation machine, and then mixing them with the rougher tailings to obtain a mixed slurry; then adding water glass and sodium hexametaphosphate to the scavenging flotation machine, wherein the amount of the water glass is 650 g / t and the amount of the sodium hexametaphosphate is 175 g / t; fully stirring the mixed slurry with the water glass and the sodium hexametaphosphate; and then aerating and scraping bubbles for scavenging. During scavenging, the foamed slurry in the scavenging flotation machine tank is scraped out to obtain lepidolite concentrate. After the scavenging is completed, the product in the scavenging flotation machine tank is the scavenging tailings, and the scavenging tailings are returned to the rougher flotation machine for a circulating flotation operation.

[0080] In this embodiment, the content of mica minerals in the obtained ceramic raw material is 1.26%, and the grade of the by-product lepidolite concentrate Li2O is 1.77%.

[0081] Example 6

[0082] This embodiment recovers building ceramic raw materials from lepidolite beneficiation tailings through the following steps:

[0083] Slurry adjustment: the lepidolite beneficiation tailings are pumped into a stirring tank, and clean water is injected into the stirring tank through a clean water pipe to adjust the slurry concentration to 15% to obtain a prefabricated slurry;

[0084] Desliming: The prefabricated slurry in the stirring tank is pumped into a desliming device, the prefabricated slurry is stirred and then settled for desliming, the stirring speed during the stirring process is 2500 r / min, the stirring time is 20 min, and the settling time is 6 min; demineralized and settled slurry are obtained, the demineralized slurry is extracted from the desliming device and subjected to filter press to obtain ecological ceramic raw materials, and the settled slurry is extracted from the desliming device to obtain pre-selected slurry;

[0085] Roughing: The pre-selected ore pulp, sodium hydroxide, water glass and sodium hexametaphosphate are placed in a roughing flotation machine for stirring, wherein the amount of the sodium hydroxide is 500 g / t, the amount of the water glass is 1400 g / t, and the amount of the sodium hexametaphosphate is 300 g / t; after sufficient stirring, 450 g / t of anionic and cationic collectors and 40 g / t of BK201 frother are added to the roughing flotation machine, stirring is continued, and roughing is performed by aeration and scraping. During the roughing, the foamed ore pulp in the roughing flotation machine tank is scraped out to obtain roughing tailings. After the roughing is completed, the product in the roughing flotation machine tank is the roughing concentrate;

[0086] First concentration: After the roughing is completed, 150g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped to perform the first concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the first concentrated tailings. After the concentration is completed, the product in the roughing flotation machine tank is the first concentrated concentrate;

[0087] Second concentration: After the first concentration is completed, 50g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped for the second concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the second concentrated tailings. After the second concentration is completed, the product in the roughing flotation machine tank is the building ceramic raw material;

[0088] Scavenging: adding the rougher tailings to a scavenging flotation machine for scavenging, wherein adding the rougher tailings to the scavenging flotation machine for scavenging specifically comprises: adding the first concentrated tailings and the second concentrated tailings to the scavenging flotation machine, and then mixing them with the rougher tailings to obtain a mixed slurry; then adding water glass and sodium hexametaphosphate to the scavenging flotation machine, wherein the amount of the water glass is 700 g / t and the amount of the sodium hexametaphosphate is 200 g / t; fully stirring the mixed slurry with the water glass and the sodium hexametaphosphate; and then aerating and scraping bubbles for scavenging. During scavenging, the foamed slurry in the scavenging flotation machine tank is scraped out to obtain lepidolite concentrate. After the scavenging is completed, the product in the scavenging flotation machine tank is the scavenging tailings, and the scavenging tailings are returned to the rougher flotation machine for a circulating flotation operation.

[0089] In this embodiment, the content of mica minerals in the obtained ceramic raw material is 1.73%, and the grade of the by-product lepidolite concentrate Li2O is 1.21%.

[0090] Example 7

[0091] This embodiment recovers building ceramic raw materials from lepidolite beneficiation tailings through the following steps:

[0092] Slurry adjustment: the lepidolite beneficiation tailings are pumped into a stirring tank, and clean water is injected into the stirring tank through a clean water pipe to adjust the slurry concentration to 15% to obtain a prefabricated slurry;

[0093] Desliming: The prefabricated slurry in the stirring tank is pumped into a desliming device, the prefabricated slurry is stirred and then settled for desliming, the stirring speed during the stirring process is 2000 r / min, the stirring time is 15 min, and the settling time is 4 min; demineralized and settled slurry are obtained, the demineralized slurry is extracted from the desliming device and subjected to filter press to obtain ecological ceramic raw materials, and the settled slurry is extracted from the desliming device to obtain pre-selected slurry;

[0094] Roughing: The pre-selected ore pulp, sodium hydroxide, water glass and sodium hexametaphosphate are placed in a roughing flotation machine for stirring, wherein the amount of sodium hydroxide is 600 g / t, the amount of water glass is 1500 g / t, and the amount of sodium hexametaphosphate is 400 g / t; after sufficient stirring, 500 g / t of anionic and cationic collectors and 20 g / t of BK201 frother are added to the roughing flotation machine, stirring is continued, and roughing is performed by aeration and scraping. During the roughing, the foamed ore pulp in the roughing flotation machine tank is scraped out to obtain roughing tailings. After the roughing is completed, the product in the roughing flotation machine tank is the roughing concentrate;

[0095] First concentration: After the roughing is completed, 180g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped to perform the first concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the first concentrated tailings. After the concentration is completed, the product in the roughing flotation machine tank is the first concentrated concentrate;

[0096] Second concentration: After the first concentration is completed, 60g / t of anionic and cationic collectors are added to the roughing flotation machine, fully stirred, and then aerated and scraped for the second concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the second concentrated tailings. After the second concentration is completed, the product in the roughing flotation machine tank is the building ceramic raw material;

[0097] Scavenging: adding the rougher tailings to a scavenging flotation machine for scavenging, wherein adding the rougher tailings to the scavenging flotation machine for scavenging specifically comprises: adding the first concentrated tailings and the second concentrated tailings to the scavenging flotation machine, and then mixing them with the rougher tailings to obtain a mixed pulp; then adding water glass and sodium hexametaphosphate to the scavenging flotation machine, wherein the amount of the water glass is 750 g / t and the amount of the sodium hexametaphosphate is 225 g / t; fully stirring the mixed pulp with the water glass and the sodium hexametaphosphate; and then aerating and scraping bubbles for scavenging. During scavenging, the foamed pulp in the scavenging flotation machine tank is scraped out to obtain lepidolite concentrate. After the scavenging is completed, the product in the scavenging flotation machine tank is the scavenging tailings, and the scavenging tailings are returned to the rougher flotation machine for a cyclic flotation operation.

[0098] In this embodiment, the amount of mica minerals in the obtained ceramic raw material is 1.82%, and the grade of the by-product lepidolite concentrate Li2O is 0.95%.

[0099] Finally, it should be noted that the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0100] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0101] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for recovering building ceramic raw materials from lepidolite beneficiation tailings, characterized in that: The method comprises: The lepidolite beneficiation tailings are sent to a stirring tank, and the slurry concentration is adjusted to obtain a prefabricated slurry; The prefabricated slurry in the stirring tank is pumped into a desludging device, the prefabricated slurry is stirred and then settled to obtain demineralized and settled slurry, the demineralized slurry is extracted from the desludging device and subjected to filter pressing to obtain an ecological ceramic raw material, and the settled slurry is extracted from the desludging device to obtain a pre-selected slurry; The pre-selected ore pulp, sodium hydroxide, water glass and sodium hexametaphosphate are placed in a roughing flotation machine for stirring, and after sufficient stirring, a collector and a frother are added to the roughing flotation machine, and stirring is continued, and aeration and foaming are performed for roughing, and during the roughing, the foamed ore pulp in the roughing flotation machine tank is scraped out to obtain roughing tailings; After the roughing is completed, a collector is added to the roughing flotation machine, fully stirred, and then aerated and scraped bubbles are used for the first cleaning. During the cleaning process, the foam pulp in the roughing flotation machine tank is scraped out to obtain the first cleaned tailings; After the first concentration is completed, a collector is added to the roughing flotation machine, fully stirred, and then aerated and scraped for a second concentration. During the concentration, the foam pulp in the roughing flotation machine tank is scraped out to obtain the second concentrated tailings. After the second concentration is completed, the product in the roughing flotation machine tank is a building ceramic raw material; The rougher tailings are added to a scavenging flotation machine for scavenging. The adding of the rougher tailings to the scavenging flotation machine for scavenging specifically comprises: adding the first concentrated tailings and the second concentrated tailings to the scavenging flotation machine, and then mixing them with the rougher tailings to obtain a mixed pulp; then adding water glass and sodium hexametaphosphate to the scavenging flotation machine, fully stirring the mixed pulp with the water glass and the sodium hexametaphosphate, and then aerating and scraping to perform scavenging; during scavenging, the foamed pulp in the scavenging flotation machine tank is scraped out to obtain lepidolite concentrate; after the scavenging is completed, the product in the scavenging flotation machine tank is the scavenging tailings, and the scavenging tailings are returned to the rougher flotation machine for a cyclic flotation operation.

2. The method for recovering building ceramic raw materials from lepidolite beneficiation tailings according to claim 1, wherein: The method of delivering the lepidolite beneficiation tailings to a stirring tank and adjusting the slurry concentration to obtain the prefabricated slurry includes: delivering the lepidolite beneficiation tailings to the stirring tank by a pump, and injecting clean water into the stirring tank through a clean water pipe to adjust the slurry concentration to obtain the prefabricated slurry.

3. The method for recovering building ceramic raw materials from lepidolite beneficiation tailings according to claim 2, wherein: The step of sending the lepidolite beneficiation tailings to a stirring tank and adjusting the slurry concentration to obtain prefabricated slurry further comprises: the slurry concentration is 15%-30%.

4. The method for recovering building ceramic raw materials from lepidolite beneficiation tailings according to claim 3, wherein: During the stirring of the prefabricated slurry, the stirring speed is 2000 r / min-3000 r / min, the stirring time is 15 min-25 min, and the sedimentation time is 4 min-8 min.

5. The method for recovering building ceramic raw materials from lepidolite beneficiation tailings according to claim 4, wherein: The step of placing the pre-selected ore pulp, sodium hydroxide, water glass and sodium hexametaphosphate into a roughing flotation machine for stirring comprises: the amount of the sodium hydroxide is 100g / t-600g / t, the amount of the water glass is 1000g / t-1500g / t, and the amount of the sodium hexametaphosphate is 100g / t-400g / t.

6. The method for recovering building ceramic raw materials from lepidolite beneficiation tailings according to claim 5, wherein: The step of adding a collector and a foaming agent to the roughing flotation machine after sufficient stirring includes: the collector is an anionic and cationic collector, and the amount of the collector is 200g / t-500g / t.

7. The method for recovering building ceramic raw materials from lepidolite beneficiation tailings according to claim 6, wherein: The step of adding a collector and a foaming agent to the roughing flotation machine after sufficient stirring further comprises: the foaming agent comprises one of kerosene, No. 2 oil and BK201, and the amount of the foaming agent is 20g / t-40g / t.

8. The method for recovering building ceramic raw materials from lepidolite beneficiation tailings according to claim 7, wherein: Adding a collector to the roughing flotation machine after the roughing is completed includes: the collector is an anionic and cationic collector, and the amount of the collector is 75g / t-180g / t.

9. The method for recovering building ceramic raw materials from lepidolite beneficiation tailings according to claim 8, wherein: Adding a collector to the roughing flotation machine after the first concentration is completed includes: the collector is an anionic and cationic collector, and the amount of the collector is 25g / t-60g / t.

10. The method for recovering building ceramic raw materials from lepidolite beneficiation tailings according to claim 9, wherein : The step of adding water glass and sodium hexametaphosphate to the scavenging flotation machine includes: the amount of the water glass is 500g / t-750g / t, and the amount of the sodium hexametaphosphate is 100g / t-225g / t.

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