Calcination water quenching system for quartz mine small-batch evaluation production and application of calcination water quenching system

Abstract

The invention particularly discloses a calcining water quenching system for quartz mine small-batch evaluation production and application of the calcining water quenching system. According to the calcining water quenching system, a protective cover is additionally arranged in a box-type furnace, and elements such as aluminum, magnesium, boron and calcium contained in refractory bricks in the box-type furnace can be prevented from being mixed into quartz sand; the water inlet pipe and the overflow pipe are connected to the two opposite side walls of the water quenching tank, so that the water level balance of the water quenching tank can be ensured, the temperature of pure water in the water quenching tank can be effectively controlled, and a proper temperature difference is provided for a quartz sand water quenching process; and pure water in the water quenching tank can be discharged through the filter plate and the water discharge pipe after water quenching is completed, so that the quartz sand can be dried based on the residual temperature of the quartz sand on the premise that the quartz sand is not transferred, the transferring and drying steps of the quartz sand are omitted, and the production cost is reduced. Therefore, the calcining water quenching system provided by the invention can effectively remove impurities in the quartz sand, so that the purity of a small batch of quartz sand samples is improved, and the calcining water quenching system has the characteristics of simple process and high purification efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of quartz sand purification, and particularly relates to a calcination water quenching system for small-batch evaluation production of quartz ore and application thereof. BACKGROUND

[0002] High-purity quartz is an indispensable basic material in the high-tech industries such as semiconductors, photovoltaics and optical fiber communication. Due to its importance in high-end manufacturing and national security, high-purity quartz is known as the "panda" in the industrial field. It is not only a new material and a mineral functional material, but also a key basic material indispensable for the production of semiconductors, photovoltaics, electronic information and high-end electro-optical sources, and is one of the key materials indispensable for the development of chips in China. It plays a very important role and position in strategic emerging industries such as electronic information, aerospace, new materials and new energy, as well as national defense and military industry and national security.

[0003] At present, enterprises need to make quartz ore into finished quartz sand for evaluation by customers. Generally, 10-110 kg of quartz sand samples are required for quartz products, so the enterprise needs to purchase 20-200 kg of ore for small-batch production verification to determine whether the small-batch production of quartz sand samples meets the customer's use requirements. Small-batch quartz sand evaluation production must also use the calcination water quenching process to break the >10um gas, liquid and gas-liquid mixed inclusions under temperature difference, and remove the inclusions impurities in the quartz sand. In the prior art, the calcination water quenching furnace for large-batch production of the production line is generally used for small-batch evaluation production of quartz ore, or direct crushing without calcination water quenching. When the calcination water quenching furnace for large-batch production of the production line is used, due to the small amount of quartz ore, there are problems such as high cost, affecting the normal production schedule, and the calcination water quenching furnace cannot completely clean the residual ore of the previous ore due to the too long furnace tube, too large water quenching pool and conveying belt system, which affects the accuracy of evaluation. If direct crushing without calcination water quenching is used, it will obviously affect the impurity removal effect and cannot accurately evaluate the quartz ore. SUMMARY

[0004] The present application is made in view of the above technical problems. The purpose is to provide a calcination water quenching system for small-batch evaluation production of quartz ore, which comprises a calcination device for calcining small-batch quartz ore and a water quenching device for water quenching the calcined quartz ore, the calcination device is connected with the water quenching device, the feeding end of the calcination device is connected with an external quartz ore pretreatment device, and the discharging end of the water quenching device is connected with an external quartz ore post-treatment device, wherein:

[0005] The calcination device comprises a box-type furnace, a protective cover is arranged in the box-type furnace, heat dissipation holes are formed in the side surface of the protective cover, the small-batch quartz ore after crushing is placed in the protective cover, and the temperature in the box-type furnace is 1000-1200℃.

[0006] The water quenching device comprises a water quenching tank and a filter plate, the filter plate is connected to the inner bottom of the water quenching tank, the bottom of the water quenching tank is connected with a drain pipe located below the filter plate, and the water quenching tank is respectively provided with a water inlet pipe and an overflow pipe on the opposite two side walls, the overflow pipe is located above the water inlet pipe and is communicated with the drain pipe for maintaining the water level balance of the water quenching tank, the water inlet pipe is connected with an external pure water system, and the water quenching temperature is ≤50℃.

[0007] In some embodiments, the protective cover is made of 310S material, and the heat dissipation holes on the protective cover are strip-shaped holes.

[0008] In some embodiments, the heating rate of the box furnace is 18-25℃ / min.

[0009] In some embodiments, the filter plate is connected to the inner bottom of the water quenching tank through a plurality of support columns connected to the bottom of the filter plate.

[0010] In some embodiments, a plurality of water filtering holes are uniformly arranged on the filter plate, and the diameter of each water filtering hole is 2-4mm.

[0011] In some embodiments, a water inlet valve is connected to the water inlet pipe, and a drain valve is connected to the drain pipe.

[0012] In some embodiments, the water inlet flow rate of the water inlet pipe is ≥30m 3 / h, and the conductivity of the pure water is ≤1us / cm.

[0013] In some embodiments, the application of the calcination and water quenching system for small batch evaluation production of quartz ore is applied to the small batch evaluation production of quartz ore, and the specific application steps include:

[0014] Pretreatment, based on the pretreatment device, the small batch of quartz ore is crushed;

[0015] Calcination, based on the calcination device, the small batch of quartz ore after crushing is calcined at 1000-1200℃ for 50-70min;

[0016] Water quenching, the small batch of quartz ore after calcination is transferred to the water quenching tank filled with pure water, and pure water is continuously introduced and the temperature in the water quenching tank is kept ≤50℃, after the water quenching is completed, the water inlet is closed and the pure water in the water quenching tank is drained through the drain pipe, and the quartz ore is dried by the residual heat of the quartz ore;

[0017] Post-treatment, the small batch of quartz ore after water quenching and drying is sequentially crushed, acidified, floated, dried and magnetically separated, and then a small batch of quartz ore sample for evaluation is obtained.

[0018] Compared with the prior art, the calcination water quenching system for small-batch evaluation production of quartz ore provided by the application has the following beneficial technical effects:

[0019] (1) The application can isolate the quartz ore from the box furnace by adding a protective cover in the box furnace, effectively avoiding the mixing of elements such as aluminum, magnesium, boron, and calcium contained in the refractory bricks in the box furnace into the quartz sand, and ensuring that the purity of the quartz sand sample is not affected.

[0020] (2) The application connects a water inlet pipe and an overflow pipe to the opposite side walls of the water quenching tank, which can ensure the water level balance of the water quenching tank and maintain the temperature of the pure water in the water quenching tank at ≤50℃, thereby providing a suitable temperature difference for the quartz sand water quenching process.

[0021] (3) The application sets a filter plate and a drain pipe at the bottom of the water quenching tank, which can drain the pure water in the water quenching tank after water quenching, thereby realizing the drying of the quartz sand based on the residual heat of the quartz sand without transferring the quartz sand, saving the step of transferring and drying the quartz sand, and reducing the production cost.

[0022] In summary, the calcination water quenching system provided by the application can be used for small-batch evaluation production of quartz ore, which can effectively remove impurities in the quartz sand, thereby improving the purity of the small-batch quartz sand sample, and has the characteristics of simple process and high purification efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 is the process flow diagram of the calcination water quenching system for small-batch evaluation production of quartz ore in the application,

[0025] Figure 2 is a structural schematic diagram of the calcination device in the application,

[0026] Figure 3 is a structural schematic diagram of the water quenching device in the application,

[0027] Figure 4 is an enlarged view of A.

[0028] In the figure: 11. box furnace, 12. protective cover, 13. heat dissipation hole, 21. water quenching tank, 22. filter plate, 23. drain pipe, 24. water inlet pipe, 25. overflow pipe, 26. support column, 27. water filter hole, 28. drain valve, 29. water inlet valve. DETAILED DESCRIPTION

[0029] The ranges disclosed herein are defined by their lower and upper limits. Ranges can be defined by any upper and lower limits, whether or not they are explicitly disclosed. Any range listed is intended to include any and all sub-ranges of that range, i.e., all combinations of any two values, including the end points between which the range is identified. For example, if a range 60-120 is stated, one should construe the range as also including the sub-ranges 61-119, 62-118, 63-117, and so on, in addition to 60-120. It will be further understood that all references to a parameter are meant only to be indicative of a particular example parameter that can be used in combination with any of the other parameters described or claimed herein. Any numerical value, including any numerical value in a numerical range, can be expressed as an approximation, e.g., 2.5 can be expressed as 2.5, 2.50, 2.5, 2.5, 2.5, etc. In this context, "about" means approximately, nearly or almost. The term "about" when used before a numerical designation of a parameter as in, for example, about 2, should be understood to encompass both of the numerical endpoint recited for the parameter, e.g., 2. Any value that is less than or greater than the recited endpoint is also contemplated. For example, if a parameter is stated to be about 2, then 1.5 and 2.5 are also contemplated. In addition, when a parameter is stated to be an integer, it is understood that the parameter can be any integer greater than or equal to 2, e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0030] REFERENCE Figures 1-4 As shown, the embodiment of the present application provides a calcination and water quenching system for small batch evaluation production of quartz ore, which comprises a calcination device for calcining small batch quartz ore and a water quenching device for water quenching the calcined quartz ore, the calcination device is connected with the water quenching device, the feeding end of the calcination device is connected with an external quartz ore pretreatment device, and the discharging end of the water quenching device is connected with an external quartz ore post-treatment device, wherein:

[0031] The calcination device comprises a box furnace 11, and the box furnace 11 is provided with a protective cover 12, the side surface of the protective cover 12 is provided with a heat dissipation hole 13, and the small batch quartz ore after crushing is placed in the protective cover 12, and the temperature in the box furnace 11 is 1000-1200 ℃;

[0032] The water quenching device comprises a water quenching box 21 and a filter plate 22 connected to the inside bottom of the water quenching box 21. The bottom of the water quenching box 21 is connected with a drain pipe 23 below the filter plate 22. The water quenching box 21 is provided with a water inlet pipe 24 and an overflow pipe 25 on the opposite sides, respectively. The overflow pipe 25 is located above the water inlet pipe 24 and is communicated with the drain pipe 23 for maintaining the water level balance of the water quenching box 21. The water inlet pipe 24 is connected with an external pure water system. The water quenching temperature is ≤50℃.

[0033] In the above embodiment, by adding the protective cover 12 in the box furnace 11, the quartz ore can be isolated from the box furnace 11, effectively avoiding the mixing of elements such as aluminum, magnesium, boron, calcium contained in the refractory bricks in the box furnace 11 into the quartz sand, and ensuring that the purity of the quartz sand sample is not affected. By connecting the water inlet pipe 24 and the overflow pipe 25 on the opposite sides of the water quenching box 21, on the one hand, the water level balance of the water quenching box 21 can be ensured, and on the other hand, the pure water temperature in the water quenching box 21 can be maintained at ≤50℃, thereby providing a suitable temperature difference for the quartz sand water quenching process. By arranging the filter plate 22 and the drain pipe 23 at the bottom of the water quenching box 21, the pure water in the water quenching box 21 can be discharged after water quenching, thereby realizing the drying of the quartz sand based on the residual heat of the quartz sand without transferring the quartz sand, saving the transfer and drying steps of the quartz sand, and reducing the production cost. Therefore, the calcination and water quenching system provided by the present application can be used for small batch evaluation production of quartz ore, which can effectively remove impurities in the quartz sand, thereby improving the purity of the small batch quartz sand sample, and has the characteristics of simple process and high purification efficiency.

[0034] In the above embodiment, the temperature in the box furnace 11 can be any temperature value between 1000-1200℃, for example, the temperature in the box furnace 11 can be 1000℃, 1050℃, 1100℃, 1150℃, 1200℃, etc. The water quenching temperature in the water quenching box 21 can be any value ≤5, preferably between 30-50℃, for example, 30℃, 35℃, 40℃, 45℃, 50℃, etc., considering that the quartz ore needs to be dried based on the residual heat of the quartz ore after water quenching.

[0035] In some embodiments, the protective cover 12 is a 310S material protective cover 12, and the heat dissipation holes 13 on the protective cover 12 are strip-shaped holes.

[0036] In the above embodiment, the 310S material protective cover 12 can withstand high temperature, thereby effectively isolating the refractory bricks in the box furnace 11 and avoiding the pollution of impurities in the refractory bricks to the quartz ore. The strip-shaped heat dissipation holes 13 are beneficial to air circulation, thereby helping to dissipate and cool the silicon-carbon rod and prolonging its service life.

[0037] In some embodiments, the heating rate of the box furnace 11 is 18-25℃ / min.

[0038] In the above embodiment, the heating rate of the box furnace 11 is set to 18-25℃ / min, which can reduce the power requirement of the equipment, thereby reducing the equipment investment cost and supporting power investment cost.

[0039] In the above embodiment, the heating rate of the box furnace 11 can be any value between 18-25℃ / min, for example, it can be 18℃ / min, 19℃ / min, 20℃ / min, 21℃ / min, 22℃ / min, 23℃ / min, 24℃ / min, 25℃ / min, etc.

[0040] In some embodiments, the filter plate 22 is connected with a plurality of support columns 26 at the bottom, and the filter plate 22 is connected to the inside bottom of the water quenching tank 21 through the support columns 26.

[0041] In the above embodiment, the plurality of support columns 26 are evenly arranged at the bottom of the filter plate 22, and the plurality of support columns 26 are used to support the filter plate 22, so that the filter plate 22 is stably arranged at the bottom of the water quenching tank 21, thereby providing guarantee for the water quenching and drying of small batches of quartz ore.

[0042] In some embodiments, a plurality of water filtering holes 27 are evenly arranged on the filter plate 22, and the diameter of each water filtering hole 27 is 2-4mm.

[0043] In the above embodiment, by arranging a plurality of water filtering holes 27 with a diameter of 2-4mm on the filter plate 22, the pure water in the water quenching tank 21 can be effectively discharged from the bottom drain pipe 23, thereby realizing the separation of pure water and small batches of quartz sand, and the quartz sand can be dried by using the residual heat of the quartz sand without moving the quartz sand after water quenching.

[0044] In the above embodiment, the diameter of the filter plate 22 can be any value between 2-4mm, for example, the diameter of the filter plate 22 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc.

[0045] In some embodiments, the water inlet pipe 24 is connected with a water inlet valve 29, and the drain pipe 23 is connected with a drain valve 28.

[0046] In the above embodiment, by connecting the water inlet valve 29 on the water inlet pipe 24 and the drain valve 28 on the drain pipe 23, the water inlet valve 29 can be used to control the water inlet flow of the water inlet pipe 24, thereby effectively controlling the water quenching temperature of the pure water in the water quenching tank 21; and the drain valve 28 can be used to control the drainage of the drain pipe 23 when the water quenching tank 21 needs to be drained.

[0047] In some embodiments, the water inlet pipe 24 has a water inlet flow rate ≥ 30 m 3 / h, and the conductivity of pure water is ≤ 1 us / cm.

[0048] In the above embodiments, the water inlet flow rate of the water inlet pipe 24 is controlled to be ≥ 30 m 3 / h, and the conductivity of pure water is controlled to be ≤ 1 us / cm, so as to ensure the water temperature of the pure water in the water quenching tank 21 and ensure the water quenching effect of the small batch of quartz sand in the water quenching tank 21.

[0049] In the above embodiments, the water inlet flow rate of the water inlet pipe 24 is controlled to be ≥ 30 m 3 / h, in order to ensure that the water quenching temperature in the water quenching tank 21 is between 20-50℃, the water inlet flow rate of the water inlet pipe 24 is controlled to be between 30-50 m 3 / h, for example, the water inlet flow rate of the water inlet pipe 24 can be 30 m 3 / h, 35 m 3 / h, 40 m 3 / h, 45 m 3 / h, 50 m 3 / h, etc.

[0050] The application also provides an application of the calcination and water quenching system for small batch evaluation production of quartz ore. The above-mentioned calcination and water quenching system is applied to the small batch evaluation production of quartz ore, and the specific application steps include:

[0051] Pre-treatment, based on the pre-treatment device, the small batch of quartz ore is crushed;

[0052] Calcination, based on the calcination device, the crushed small batch of quartz ore is calcined at 1000-1200℃ for 50-70 min;

[0053] Water quenching, the calcined small batch of quartz ore is transferred to the water quenching tank 21 filled with pure water, and pure water is continuously introduced and the temperature in the water quenching tank 21 is kept ≤ 50℃, after the water quenching is completed, the water inlet is closed and the pure water in the water quenching tank 21 is drained through the drain pipe 23, and the quartz ore is dried by using the residual heat of the quartz ore;

[0054] Post-treatment, the small batch of quartz ore after water quenching and drying is sequentially crushed, acidified, floated, dried and magnetically separated, and then a small batch of quartz ore sample for evaluation is obtained.

[0055] In the above embodiment, first, the small batch of quartz ore crushed to a certain particle size by the pretreatment device is sent into the protective cover 12 in the box furnace 11, and the temperature of the box furnace 11 is raised to 1000-1200°C at a temperature raising rate of 18-25°C / min, and the small batch of quartz ore is calcined for 50-70 min; then, pure water is input into the water quenching box 21 through the water inlet pipe 24 until the water level is flush with the overflow pipe 25, and then the calcined small batch of quartz ore is transferred into the water quenching box 21, and the pure water is continuously input to control the water quenching temperature in the water quenching box 21 below 50°C, so as to ensure the water quenching effect, and when the water quenching is completed, the pure water in the water quenching box 21 is discharged through the filter plate 22 and the drain pipe 23, and the quartz ore can be dried under the residual temperature of the quartz ore; finally, the small batch of quartz sand dried by water quenching is transferred to the post-treatment device to be crushed, acidified, floated, dried and magnetically separated in sequence, and finally the small batch of quartz sand evaluation sample is obtained. Based on the technical effect description of the calcination and water quenching system described above, the calcination and water quenching system is applied to the small batch of quartz ore evaluation production, and has the same technical effect, which will not be described here.

[0056] In the above embodiment, it should be pointed out that the quartz sand dried by water quenching is crushed, acidified, floated, dried and magnetically separated by using the existing technology process, which will not be described here.

[0057] The following examples more specifically describe the disclosure of the present application, which are only used for illustrative description, because various modifications and changes within the scope of the disclosure of the present application are obvious to those skilled in the art. Unless otherwise stated, all reagents and raw materials used in the examples are commercially available or synthesized according to conventional methods, and the instruments and equipment used in the examples are commercially available.

[0058] Example 1

[0059] 1) Select 100 kg of quartz ore and crush to 3-5 cm, and then wash and dry;

[0060] 2) The quartz ore obtained in step 1) is placed in the protective cover 12 of the box furnace 11, and the temperature is raised to 1000°C at a temperature raising rate of 18°C / min for calcining the quartz ore for 70 min;

[0061] 3) continuously inject pure water into the water quenching box 21 at a water flow rate of 30 m 3 / h, and ensure that the temperature in the water quenching box 21 is maintained at 50°C, then transfer the calcined quartz ore in step 2) into the water quenching box 21 for water quenching, until the pure water in the water quenching box 21 is discharged through the drain pipe 23, at this time, the quartz ore is dried by using the residual temperature of the quartz ore;

[0062] 4) using an impact crusher to make 60-180 mesh quartz sand from the water-quenched and dried quartz sand, then using a mixed acid made by mixing hydrochloric acid and hydrofluoric acid in a volume ratio of 1:3 to acidize the quartz sand, the mass ratio of the quartz sand to the mixed acid being 2:1, then washing to remove the acid after acid leaching at 100°C for 24 hours;

[0063] 5) using an amine-based flotation reagent to float, then drying and high-intensity magnetic separation to obtain a small batch of quartz sand evaluation samples.

[0064] Example 2

[0065] 1) Select 100 kg of quartz ore and crush to 3-5 cm, then wash and dry;

[0066] 2) Place the quartz ore obtained in step 1) in the protective cover 12 of the box furnace 11, and heat to 1100°C at a heating rate of 20°C / min to calcine the quartz ore for 60 min;

[0067] 3) continuously inject pure water into the water-quenching tank 21 at a flow rate of 40 m 3 / h, and ensure that the temperature in the water-quenching tank 21 is maintained at 40°C, then transfer the calcined quartz ore of step 2) to the water-quenching tank 21 for water quenching, and after the water quenching is completed, drain the pure water in the water-quenching tank 21 through the drain pipe 23, at this time, use the residual heat of the quartz ore to dry the quartz ore;

[0068] 4) using an impact crusher to make 60-180 mesh quartz sand from the water-quenched and dried quartz sand, then using a mixed acid made by mixing hydrochloric acid and hydrofluoric acid in a volume ratio of 1:3 to acidize the quartz sand, the mass ratio of the quartz sand to the mixed acid being 2:1, then washing to remove the acid after acid leaching at 100°C for 24 hours;

[0069] 5) using an amine-based flotation reagent to float, then drying and high-intensity magnetic separation to obtain a small batch of quartz sand evaluation samples.

[0070] Example 3

[0071] 1) Select 100 kg of quartz ore and crush to 3-5 cm, then wash and dry;

[0072] 2) Place the quartz ore obtained in step 1) in the protective cover 12 of the box furnace 11, and heat to 1200°C at a heating rate of 25°C / min to calcine the quartz ore for 50 min;

[0073] 3) continuously inject pure water into the water-quenching tank 21 at a flow rate of 50 m 3Pure water is injected into the water quenching tank 21 at a flow rate of 1 / h, and the temperature in the water quenching tank 21 is maintained at 30°C. The quartz ore calcined in step 2) is then transferred to the water quenching tank 21 for water quenching. After the water quenching is completed, the pure water in the water quenching tank 21 is drained through the drain pipe 23. At this time, the residual heat of the quartz ore is used to dry the quartz ore.

[0074] 4) Using an impact crusher to crush the quartz sand after water quenching and drying into 60-180 mesh quartz sand, then acidifying it with a mixed acid of hydrochloric acid and hydrofluoric acid in a volume ratio of 1:3, and the mass ratio of quartz sand to mixed acid is 2:1, and then acid leaching at 100°C for 24 hours and then cleaning and deacidification;

[0075] 5) Use amine flotation agents for flotation, and then dry and perform strong magnetic separation to obtain a small batch of quartz sand evaluation samples.

[0076] Comparative Example 1

[0077] The same as Example 1, the difference from Example 1 is that steps 2) and 3) in Comparative Example 1 use the production line calcining furnace for calcination and water quenching, and the lower hopper, furnace tube, water quenching pool, conveyor belt and silo in the production line calcining furnace are cleaned as much as possible.

[0078] Comparative Example 2

[0079] The method is the same as Example 2, but different from Example 2 in that there is no protective cover 12 in step 2) of Comparative Example 2, and the quartz ore obtained in step 1) is directly placed in the box furnace 11 for calcination.

[0080] Small batches of quartz sand evaluation samples obtained in Examples 1-3 and Comparative Examples 1-2 were respectively taken for impurity content analysis. The analysis results are shown in Table 1.

[0081] Table 1 Impurity content of high-purity quartz sand obtained in Examples 1-3 and Comparative Examples 1-2

[0082]

[0083]

[0084] The unit of the various metal impurity contents in Table 1 is ppm. It can be seen from Table 1 that the total impurity contents of Examples 1-3 are all below 15 ppm, while the total impurity contents of Comparative Examples 1-2 are all above 22 ppm. Therefore, the total impurity contents of Examples 1-3 are significantly lower than those of Comparative Examples 1-2.

[0085] Compared with Example 1, Comparative Example 1 uses a production line calcining furnace to calcine and water quench a small batch of quartz ore. Since other quartz ores will remain in the production line calcining furnace, the small batch of quartz ore evaluation samples will be affected, resulting in a high content of some element impurities in the sample;

[0086] Compared with Example 2, the comparative example 2 does not set the protective cover 12 in the calcination device, and the aluminum, magnesium, calcium, boron and other elements contained in the refractory bricks in the box furnace 11 are doped into the final small batch quartz ore evaluation sample, thereby causing the impurity content to be too high;

[0087] In summary, the calcination water quenching system for small batch evaluation production of quartz ore provided in the present application is applied to the small batch evaluation production of quartz ore, which can effectively remove the impurities in the quartz ore, thereby meeting the evaluation needs of customers and solving the technical problems existing in the prior art.

[0088] The above describes in detail the calcination water quenching system for small batch evaluation production of quartz ore and its application provided in the present application. The principles and implementation modes of the present application are described by applying specific examples, and the above description of the examples is only used to help understand the core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A calcination and water quenching system for small-batch evaluation and production of quartz ore, characterized in that: The invention comprises a calcining device for calcining small batches of quartz ore and a water quenching device for water quenching the calcined quartz ore. The calcining device is connected to the water quenching device. The feed end of the calcining device is connected to an external quartz ore pretreatment device. The discharge end of the water quenching device is connected to an external quartz ore post-treatment device. The calcining device includes a box-type furnace with a protective cover provided in the box-type furnace. The side of the protective cover is provided with heat dissipation holes. The small batch of quartz ore after jaw crushing is placed in the protective cover. The temperature in the box-type furnace is 1000-1200°C. A water quenching device includes a water quenching box and a filter plate. The filter plate is connected to the inner bottom of the water quenching box. The bottom of the water quenching box is connected to a drain pipe located below the filter plate. An inlet pipe and an overflow pipe are respectively provided on the opposite side walls of the water quenching box. The overflow pipe is located at the upper part of the inlet pipe and is connected to the drain pipe to maintain the water level balance of the water quenching box. The inlet pipe is connected to an external pure water system. The water quenching temperature is ≤50°C.

2. The calcination water quenching system according to claim 1, characterized in that: The protective cover is made of 310S material, and the heat dissipation holes on the protective cover are strip-shaped holes.

3. The calcination water quenching system according to claim 1, characterized in that: The heating rate of the box furnace is 18-25°C / min.

4. The calcination water quenching system according to claim 1, characterized in that: A plurality of support columns are connected to the bottom of the filter plate, and the filter plate is connected to the bottom of the inner side of the water quenching box through the support columns.

5. The calcination water quenching system according to claim 4, characterized in that: The filter plate is evenly provided with a plurality of water filter holes, and the aperture of each water filter hole is 2-4 mm.

6. The calcination water quenching system according to claim 1, characterized in that: The water inlet pipe is connected to a water inlet valve, and the drain pipe is connected to a drain valve.

7. The calcination water quenching system according to claim 6, characterized in that: The water inlet pipe is connected to a water inlet valve, and the water flow rate of the water inlet pipe is ≥30m 3 / h, the conductivity of pure water is ≤1us / cm.

8. An application of a calcination and water quenching system for small-batch evaluation and production of quartz ore, characterized in that: The calcination and water quenching system according to any one of claims 1 to 7 is applied to small-batch evaluation and production of quartz ore, and the specific application steps include: Pretreatment: jaw crushing of small batches of quartz ore based on pretreatment equipment; Calcination: calcining a small batch of quartz ore after jaw crushing based on a calcination device, keeping the temperature at 1000-1200℃ for 50-70min; Water quenching: transfer the calcined small batch of quartz ore to a water quenching tank filled with pure water in the water quenching device, and continuously introduce pure water while maintaining the temperature in the water quenching tank ≤ 50°C. After the water quenching is completed, close the water inlet and drain the pure water in the water quenching tank through the drain pipe, and use the residual heat of the quartz ore to dry the quartz ore; In post-processing, the small batch of quartz ore after water quenching and drying is crushed, acidified, floated, dried and magnetically separated in sequence to obtain a small batch of quartz ore samples for evaluation.

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