Method for preparing red colored sand from molybdenum tailings
The method of preparing red colored sand from molybdenum tailings solves the problem of existing colored sand preparation processes relying on natural red stones, simplifies the production process, reduces costs, protects the ecological environment, and achieves efficient utilization of resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-09
- Publication Date
- 2026-04-10
AI Technical Summary
Existing colored sand preparation processes require natural red stones, which damages the ecological environment, and the production process is complex and costly.
Red colored sand is prepared by screening molybdenum tailings, magnetic separation to remove iron, flotation to remove mica, roughing and cleaning of feldspar, and scavenging, thus utilizing molybdenum tailings resources and avoiding manual selection and complex processes.
The process for preparing red colored sand is simple, low-cost, and does not damage the ecological environment, thus improving resource utilization efficiency and economic benefits.
Smart Images
Figure CN121820041A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the field of producing red color sand from molybdenum tailings, and particularly relates to a method for preparing red color sand from molybdenum tailings. BACKGROUND
[0002] The existing color sand preparation process is to select red natural stone blocks, manually sort and collect the stone blocks with the same or similar red color, and then obtain 20-40 mesh, 40-70 mesh and 70-140 mesh sand through the processes of coarse crushing, medium crushing, fine crushing, sand making and screening. The main problems are as follows: 1. The red stone blocks with consistent natural color are needed, which will damage the ecological environment; 2. The production process is complex and the efficiency is low; and 3. The production cost is high due to the manual or equipment selection according to the color. SUMMARY
[0003] The application provides a method for preparing red color sand from molybdenum tailings to solve the defects in the prior art.
[0004] The application is implemented through the following technical scheme. A method for preparing red color sand from molybdenum tailings comprises the following steps. Step one: screen the molybdenum tailings to obtain molybdenum tailing particles with a particle size; Step two: add water to the molybdenum tailing particles with the particle size to prepare a slurry, and perform magnetic separation to remove iron; Step three: after the iron removal, perform flotation to remove mica, and reserve the remaining mineral particles; Step four: add water to the remaining mineral particles obtained in step three to prepare a slurry, and add an inhibitor and a collector to perform feldspar rough separation, and separate the floating particles for reservation; Step five: after the floating particles are recovered, perform fine separation to obtain industrial-grade feldspar; Step six: perform sweeping separation on the remaining particles after the removal of the floating particles in step four to obtain red color sand and quartz.
[0005] The method for preparing red color sand from molybdenum tailings as described above, wherein the particle size range in step one is 20-140 mesh.
[0006] The method for preparing red color sand from molybdenum tailings as described above, wherein in step two, the molybdenum tailing particles with the particle size are added with water to prepare a slurry with a concentration of 30%, and the slurry is subjected to iron removal through a magnetic separator with a field strength of 1.4 T.
[0007] The method for preparing red color sand from molybdenum tailings as described above, wherein in step three, after the iron removal is completed, oxalic acid is added to the slurry to adjust the pH of the slurry to 4.5, and the mica is removed through flotation.
[0008] The method for preparing red color sand from molybdenum tailings as described above, in step four, the remaining mineral particles obtained in step three are added with water to prepare a mineral slurry with a concentration of 35%, oxalic acid is used to adjust the pH of the mineral slurry to 4.5, quartz inhibitor and feldspar mineral collector are added, and No. 2 oil is added as a foaming agent, the addition amount of No. 2 oil is 20 g / t, the mineral slurry in the flotation tank is fully stirred for 4 min, and then air flotation is carried out, the air charging amount is 2 m 3 / h, and the floating particles are obtained for standby.
[0009] The method for preparing red color sand from molybdenum tailings as described above, in step four, the quartz inhibitor is a mixture of any one or both of oxalic acid and sodium lignosulfonate in any proportion, and the addition amount of the inhibitor is 400 g / t.
[0010] The method for preparing red color sand from molybdenum tailings as described above, in step four, the collector is a mixture of any one or both of oleic acid and dodecylamine in any proportion, and the addition amount of the collector is 250 g / t.
[0011] The method for preparing red color sand from molybdenum tailings as described above, in step five, the specific operation of cleaning and scavenging the floating particles is as follows: the floating particles obtained in step four are added with water to prepare a mineral slurry with a concentration of 35%, oxalic acid is added to adjust the pH of the mineral slurry to 4.5, and then quartz inhibitor lignosulfonate and feldspar mineral collector oleic acid and dodecylamine are added, and No. 2 oil is added as a foaming agent, the addition amount of oxalic acid is 200 g / t, the addition amount of lignosulfonate is 100 g / t, the addition amount of dodecylamine is 160 g / t, and the addition amount of No. 2 oil is 20 g / t, the mineral slurry in the flotation tank is air-flotation scraped, the air charging amount is 2 m 3 / h, and the feldspar cleaning operation is completed, and the floating particles are feldspar products.
[0012] The method for preparing red color sand from molybdenum tailings as described above, in step six, the specific operation of scavenging the remaining particles obtained by removing the floating particles in step four is as follows: the remaining mineral slurry obtained in step four is added with water to prepare a mineral slurry with a concentration of 35%, oxalic acid is added to adjust the pH of the mineral slurry to 4.5, and then the mineral slurry is scavenged using quartz inhibitor, color sand collector and foaming agent No. 2 oil, the addition amount of the quartz inhibitor is 300 g / t, the addition amount of the color sand collector is 250 g / t, and the addition amount of No. 2 oil is 15 g / t, the quartz inhibitor is a mixture of any one or both of oxalic acid and sodium lignosulfonate in any proportion, and the color sand collector is a mixture of any one or both of sodium oleate and dodecylamine in any proportion, the flotation tank is air-flotation scraped, and the air charging amount is 2 m 3 / h, and the scavenging operation is completed, and the floating particles are color sand, and the remaining mineral particles after scavenging are quartz products.
[0013] The method for preparing red color sand from molybdenum tailings as described above, wherein the red color sand obtained in step six is dried at 100 DEG C for 3 hours to obtain the red color sand product.
[0014] The advantage of the present application is that the intermediate product obtained in the process of separating quartz and feldspar from molybdenum tailings is used as red color sand, the production process is simple and the cost is low compared with the traditional method, it belongs to resource comprehensive utilization, and it does not destroy the ecological environment compared with the traditional process. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0016] Figure 1 is the production flow chart of the present application; Figure 2 is the red color sand product schematic diagram of the embodiment of the present application; Figure 3 is the product quality detection report schematic diagram of the embodiment of the present application. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0018] As shown in Figure 1 , a method for preparing red color sand from molybdenum tailings comprises the following steps: Step one: screen the molybdenum tailings to obtain molybdenum tailings particles meeting the particle size; Step two: add water to the molybdenum tailings particles meeting the particle size to prepare a slurry and perform magnetic separation to remove iron; Step three: after removing iron, perform flotation to remove mica, and reserve the remaining mineral particles; Step four: add water to the remaining mineral particles obtained in step three to prepare a slurry, and add inhibitors and collectors to perform rough separation of feldspar, and separate the floating particles for reservation; Step five: after recovering the floating particles, perform fine separation to obtain industrial-grade feldspar; Step six: the remaining particles of step four are removed by cleaning to obtain red color sand and quartz.
[0019] Preferably, the particle size range in step one of the embodiment is 20-140 mesh.
[0020] Preferably, in step two of the embodiment, the molybdenum tailings particles meeting the particle size are added with water to prepare a slurry with a concentration of 30%, and then subjected to iron removal by a magnetic separator with a field strength of 1.4T.
[0021] Preferably, in step three of the embodiment, after iron removal, oxalic acid is added to adjust the pH of the slurry to 4.5, and then mica is removed by flotation.
[0022] Preferably, in step four of the embodiment, the remaining mineral particles obtained in step three are added with water to prepare a slurry with a concentration of 35%, and then the pH of the slurry is adjusted to 4.5 by adding oxalic acid, and then a quartz depressant and a feldspar collector are added, and 2# oil is added as a frother, the addition amount of 2# oil is 20g / t, the slurry in the flotation tank is fully stirred for 4min, and then air flotation is carried out, the air charging amount is 2m 3 / h, and the flotation is scraped for 2min to obtain floating particles for standby.
[0023] Preferably, in step four of the embodiment, the quartz depressant is a mixture of any one or both of oxalic acid and sodium lignosulfonate in any proportion, and the addition amount of the depressant is 400g / t.
[0024] Preferably, in step four of the embodiment, the collector is a mixture of any one or both of oleic acid and dodecylamine in any proportion, and the addition amount of the collector is 250g / t.
[0025] Preferably, in step five of the embodiment, the specific operation of cleaning and cleaning of the floating particles is as follows: the floating particles obtained in step four are added with water to prepare a slurry with a concentration of 35%, and then oxalic acid is added to adjust the pH to 4.5, and then a quartz depressant lignosulfonate and a feldspar collector oleic acid and dodecylamine are added, and 2# oil is added as a frother, the addition amount of oxalic acid is 200g / t, the addition amount of lignosulfonate is 100g / t, the addition amount of dodecylamine is 160g / t, and the addition amount of 2# oil is 20g / t, the slurry in the flotation tank is air floated and scraped, the air charging amount is 2m 3 / h, and the feldspar cleaning operation is completed, and the floating particles are feldspar products.
[0026] Preferably, the specific operation of the step six of the embodiment is that: the remaining mineral slurry obtained in step four is added with water to adjust the concentration to 35%, and oxalic acid is added to adjust the pH to 4.5; the quartz inhibitor, the colored sand collector and the frother No. 2 oil are used for the scavenging operation of the mineral slurry, the addition amount of the quartz inhibitor is 300 g / t, the addition amount of the colored sand collector is 250 g / t, and the addition amount of the frother No. 2 oil is 15 g / t; the quartz inhibitor is a mixture of oxalic acid and sodium lignosulfonate in any proportion, the colored sand collector is a mixture of sodium oleate and dodecylamine in any proportion, and the air floatation is scraped bubble in the floatation tank with the air charging amount of 2 m 3 / h, and the scavenging operation is completed, the floating particles are the colored sand, and the remaining mineral particles after the scavenging operation are the quartz product.
[0027] Preferably, the red colored sand product is obtained after the red colored sand obtained in step six of the embodiment is dried at 100 ℃ for 3 h.
[0028] Preferably, the feldspar roughing of the embodiment is not to completely float out all the feldspar, but to control the addition amounts of the quartz inhibitor, the feldspar collector and the frother No. 2 oil to float out about 60% of the feldspar in the roughing stage, and a certain proportion of the feldspar is still in the mineral slurry in the scavenging stage; the feldspar and quartz mixture is floated up in the scavenging stage by controlling the addition amounts of the quartz inhibitor, the colored sand collector and the frother No. 2 oil, the mixture is not completely dissociated but is the product of the same mineral after crushing, and can be used as the colored sand product; therefore, the feldspar roughing in step four, the feldspar cleaning in step five and the scavenging in step six of the embodiment use similar reagents but different amounts, so that different products can be obtained, and the intermediate product obtained in the process of separating the quartz and the feldspar from the molybdenum tailings is used as the red colored sand.
[0029] Embodiment Step one: the molybdenum tailings are screened to obtain the molybdenum tailing particles with the particle size range of 20-140; Step two: the molybdenum tailing particles with the particle size are added with water to adjust the concentration to 30%, and the iron is removed by the magnetic separator with the field strength of 1.4 T; Step three: the pH of the mineral slurry after the iron removal is adjusted to 4.5 by adding oxalic acid, the mica is removed by floatation, and the remaining mineral particles are reserved; Step four: the remaining mineral particles obtained in step three are added with water to adjust the concentration to 35%, the pH of the mineral slurry is adjusted to 4.5 by using oxalic acid, and then sodium lignosulfonate (the addition amount is 400 g / t) and oleic acid (the addition amount is 250 g / t) are added; the frother No. 2 oil (the addition amount is 20 g / t) is added as the frother, the mineral slurry in the floatation tank is fully stirred for 4 min, and then the air floatation is performed with the air charging amount of 2 m3 / h, the upper floating particles are obtained for standby; Step five: the upper floating particles are recovered and then subjected to cleaning and sweeping, and the specific operation is as follows: the upper floating particles obtained in step four are added with water to prepare a slurry with a concentration of 35%, the slurry is added with oxalic acid to adjust the pH to 4.5, and then the quartz depressant lignin sulfonate, the feldspar ore collector oleic acid and dodecylamine, and the frother No. 2 oil are added, the addition amount of the oxalic acid is 200 g / t, the addition amount of the lignin sulfonate is 100 g / t, the addition amount of the dodecylamine is 160 g / t, and the addition amount of the No. 2 oil is 20 g / t, the slurry in the flotation tank is subjected to air flotation and scraping, the air charging amount is 2 m 3 / h, the feldspar cleaning operation is completed, and the upper floating particles are the feldspar product, and the industrial-grade feldspar is obtained; Step six: the remaining particles after the removal of the upper floating particles in step four are subjected to sweeping, and the specific operation of the sweeping is as follows: the remaining slurry obtained in step four is added with water to prepare a slurry with a concentration of 35%, the slurry is added with oxalic acid to adjust the pH to 4.5, and then the slurry is subjected to sweeping by using sodium lignin sulfonate (the addition amount is 300 g / t), sodium oleate (the addition amount is 200 g / t), dodecylamine (the addition amount is 50 g / t), and the frother No. 2 oil (the addition amount is 15 g / t), the slurry in the flotation tank is subjected to air flotation and scraping, the air charging amount is 2 m 3 / h, the sweeping operation is completed, the upper floating particles are the red color sand product, and the remaining mineral particles after the sweeping are the quartz product, the red color sand product is obtained after the red color sand is dried at a temperature of 100℃ for 3 h (as shown in Figure 2 ).
[0030] It can be known from the performance detection (as shown in Figure 3 ) of the red color sand product prepared in the embodiments of the present application that the red color sand product prepared in the embodiments of the present application has uniform color and stable composition, meets the industry standard of the color sand for building decoration, the production cost of the red color sand product obtained by separating the quartz and the feldspar through the molybdenum tailings is low, the income can be increased, and the high value-added utilization of the molybdenum tailings is realized.
[0031] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A method of preparing red color sand from molybdenum tailings, characterized by: It comprises the following steps: Step one: screen the molybdenum tailings to obtain molybdenum tailings particles with a certain particle size; Step two: add water to the molybdenum tailings particles with a certain particle size to form a slurry and remove iron by magnetic separation; Step three: remove mica by flotation after removing iron, and reserve the remaining mineral particles; Step four: add water to the remaining mineral particles obtained in step three to form a slurry, and add inhibitors and collectors for rough flotation of feldspar, and separate the floating particles for use; Step five: after recovering the floating particles, carry out cleaning to obtain industrial-grade feldspar; Step six: carry out scavenging on the remaining particles after removing the floating particles in step four to obtain red color sand and quartz.
2. A method of preparing red color sand from molybdenum tailings according to claim 1, characterized by: The particle size range in step one is 20-140 mesh.
3. A method of preparing red color sand from molybdenum tailings according to claim 1, characterized by: In step two, the molybdenum tailings particles with a certain particle size are added to water to form a slurry with a concentration of 30%, and the slurry is subjected to iron removal by a magnetic separator with a field strength of 1.4T.
4. A method of preparing red color sand from molybdenum tailings according to claim 1, characterized by: In step three, after the iron removal is completed, oxalic acid is added to the slurry to adjust the pH of the slurry to 4.5, and the mica is removed by flotation.
5. A method of preparing red colored sand from molybdenum tailings according to claim 1, characterized by: The remaining mineral particles obtained in step three of step four are added with water to make a mineral slurry with a concentration of 35%, and oxalic acid is used to adjust the pH of the mineral slurry to 4.5, then quartz inhibitors and feldspar mineral collectors are added, and No. 2 oil is added as a foaming agent, the addition amount of No. 2 oil is 20 g / t, after fully stirring the mineral slurry in the flotation tank for 4 min, air flotation is carried out, the air charging amount is 2 m 3 / h, and the flotation blade is scraped for 2 min to obtain floating particles for standby.
6. A method of preparing red colored sand from molybdenum tailings according to claim 1, characterized by: The quartz inhibitor in step four is a mixture of any one or both of oxalic acid and sodium lignosulfonate in any proportion, and the addition amount of the inhibitor is 400g / t.
7. A method of preparing red colored sand from molybdenum tailings according to claim 1, characterized by: The capturing agent in step four is a mixture of any one or both of oleic acid and dodecylamine in any proportion, and the addition amount of the collector is 250g / t.
8. A method of preparing red color sand from molybdenum tailings according to claim 1, characterized by: The specific operation of the step five of the selection and cleaning of the floating particles is as follows: the floating particles obtained in the step four are added with water to form a slurry with a concentration of 35%, the slurry is added with oxalic acid to adjust the pH to 4.5, and then the quartz inhibitor lignosulfonate and the feldspar mineral collector oleic acid and dodecylamine are added, the addition amount of the oxalic acid is 200 g / t, the addition amount of the lignosulfonate is 100 g / t, the addition amount of the dodecylamine is 160 g / t, and the addition amount of the 2# oil is 20 g / t, the slurry in the flotation tank is aerated and floated to scrape the bubbles, the aeration amount is 2 m 3 / h, the feldspar selection operation is completed, and the floating particles are the feldspar product.
9. A method of preparing red colored sand from molybdenum tailings according to claim 1, characterized by: The specific operation of the step six of sweeping the remaining particles of step four is as follows: the remaining slurry of step four is added with water to form a slurry with a concentration of 35%, the slurry is added with oxalic acid to adjust the pH to 4.5, and the slurry is swept using a quartz inhibitor, a colored sand collector and a frother No. 2 oil, the addition amount of the quartz inhibitor is 300 g / t, the addition amount of the colored sand collector is 250 g / t, and the addition amount of the No. 2 oil is 15 g / t, the quartz inhibitor is a mixture of oxalic acid and sodium lignosulfonate in any proportion, the colored sand collector is a mixture of sodium oleate and dodecylamine in any proportion, the flotation tank is aerated and froth is scraped, the aeration amount is 2 m 3 / h, the sweeping operation is completed, the floating particles are colored sand, and the remaining mineral particles after sweeping are quartz products.
10. A method of preparing red color sand from molybdenum tailings according to claim 1, characterized by: The red color sand obtained by separation in step six is dried at a temperature of 100℃ for 3h to obtain the red color sand product.