A method for continuously producing strontium chloride solution

Abstract

The invention discloses a method for continuously producing a strontium chloride solution, which realizes the continuous production of the strontium chloride solution, overcomes the disadvantages of the intermittent production method such as poor environment and low stirring efficiency, and can improve the dispersed contact effect between reactants by means of liquid stirring inside a reaction tank and a separation tank, and can also separate strontium sulfate and strontium carbonate impurities that do not participate in the chemical reaction and confine them in the middle and lower parts of the reaction tank and the separation tank, and collect them after being released and filtered by a belt filter; and the captured CO is compressed by a compressor. 2 The gas is stored in a carbon dioxide storage tank, which meets the safety, environmental protection and occupational health requirements. 2 With high concentration, it can be used as raw material for producing strontium carbonate, thus realizing the comprehensive utilization of carbon capture; finally, by returning the strontium chloride solution to the reaction tank, not only can the carrier effect of water in the strontium chloride solution be utilized again, but the concentration of the produced strontium chloride solution can also be greatly increased.

Description

Technical Field

[0001] The invention relates to the technical field of methods for producing strontium chloride solutions, and in particular to a method for continuously producing strontium chloride solutions. Background Art

[0002] Strontium chloride is a kind of inorganic salt and the most common strontium salt. Its aqueous solution is weakly acidic. Strontium chloride is a precursor for the preparation of other strontium compounds and is also used as a corrosion inhibitor for aluminum. In addition, strontium chloride can also be used as a red colorant for fireworks.

[0003] In the existing equipment for producing strontium chloride solution using strontium ore and dilute hydrochloric acid as raw materials, mechanical stirring is generally not possible due to the strong corrosiveness and severe abrasion of hydrochloric acid. Instead, compressed air stirring is usually used, and the operation can only be carried out in an intermittent production method. This intermittent production method has the following disadvantages: 1. The air stirring effect is poor and the efficiency is also low; 2. The method for separating coarse particles that do not participate in the reaction is backward; 3. The positive pressure state occurs from time to time, and the volatilized hydrochloric acid and overflowed CO 2 and water vapor, which will cause the working environment to fail to meet the requirements of safety, environmental protection and occupational health; 4. Uncaptured CO 2 Dispersed into the atmosphere, it also exacerbates the greenhouse effect of the atmosphere.

[0004] Therefore, it is urgent to design a method for producing strontium chloride solution that can completely solve a series of problems caused by intermittent production. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a method for continuously producing strontium chloride solution.

[0006] The technical solution is as follows:

[0007] A method for continuously producing a strontium chloride solution comprises the following steps:

[0008] S1, process water output from the process water delivery pipeline, strontium ore output from the strontium ore delivery hopper, strontium chloride solution output from the primary filter press, and filter residue washing water output from the secondary filter press are all delivered to the ball mill at the same time;

[0009] S2, the ball mill grinds the mixture to obtain a solid slurry, and the solid slurry flows into the reaction tank through the solid slurry inlet on the upper side wall of the reaction tank;

[0010] S3, the dilute hydrochloric acid output from the dilute hydrochloric acid delivery pipeline, the strontium chloride solution output from the primary filter press, the filter residue washing water output from the secondary filter press, the washing water output from the washing tower, the filter washing water output from the floor trough, and the reaction slurry output from the stirring fine slurry outlet on the upper side wall of the reaction tank are all pumped into the stirring liquid inlet at the bottom of the reaction tank at the same time;

[0011] S4, the product slurry obtained after the reaction in the reaction tank flows out from the product slurry outlet in the middle of the side wall of the reaction tank, and then flows into the separation tank through the separation tank feed port in the middle and upper part of the side wall of the separation tank;

[0012] S5, the strontium sulfate particle slurry in the reaction tank flows out from the first strontium sulfate slurry outlet at the lower part of the side wall of the reaction tank and flows to the belt filter. The strontium sulfate particles filtered by the belt filter are transported to the first stockpile yard for storage, and the filter washing water filtered by the belt filter flows into the ground trough located below the belt filter;

[0013] S6. After the reactants without large particles in the separation tank flow out from the circulating material outlet at the upper part of the side wall of the separation tank, they are pumped into the reactant inlet at the bottom of the separation tank, mixed and stirred, and the product slurry flowing from the reaction tank and the strontium sulfate particle slurry in the separation tank are washed and separated, and then flow out from the second strontium carbonate slurry outlet at the lower part of the side wall of the separation tank and flow to the belt filter. The strontium carbonate particles filtered by the belt filter are transported to the first stockpile for storage, and the filtered washing water filtered by the belt filter flows into the ground trough located below the belt filter;

[0014] S7, the strontium chloride slurry in the separation tank is pumped into the first-level filter press through the product outlet at the middle and lower part of the side wall of the separation tank for filtration, a part of the strontium chloride solution filtered by the first-level filter press flows into the strontium chloride solution storage tank, and the other part flows to the ball mill of step S1 and the reaction tank of step S3, the filter residue filtered by the first-level filter press is filtered by the second-level filter press, the filter residue washing water filtered by the second-level filter press flows to the ball mill of step S1 and the reaction tank of step S3, and the filter residue filtered by the second-level filter press is transported to the second stockpile;

[0015] S8. After the carbon dioxide gas generated in the reaction tank is discharged from the exhaust port of the reaction tank at the top of the reaction tank and the carbon dioxide gas generated in the separation tank is discharged from the exhaust port of the separation tank at the top of the separation tank, they first enter the washing tower for washing. After the washing is completed, the carbon dioxide gas is pumped by the compressor to the carbon dioxide storage tank for storage. Among them, the process water output by the process water delivery pipeline supplies water to the washing tower.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A method for continuously producing strontium chloride solution using the above technical solution realizes the continuous production of strontium chloride solution, which not only overcomes the disadvantages of the intermittent production method such as poor environment and low stirring efficiency, but also improves the dispersed contact effect between reactants by means of liquid stirring inside the reaction tank and the separation tank, and at the same time, strontium sulfate and strontium carbonate impurities that do not participate in the chemical reaction are separated and confined in the middle and lower parts of the reaction tank and the separation tank, and are filtered by a belt filter and then collected in a centralized manner after being released; and the captured CO is compressed by a compressor 2The gas is stored in a carbon dioxide storage tank, which meets the safety, environmental protection and occupational health requirements. 2 With high concentration, it can be used as raw material for producing strontium carbonate, thus realizing the comprehensive utilization of carbon capture; finally, by returning the strontium chloride solution to the reaction tank, not only can the carrier effect of water in the strontium chloride solution be utilized again, but the concentration of the produced strontium chloride solution can also be greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A logic block diagram of a method for continuously producing a strontium chloride solution;

[0019] Figure 2 This is the schematic diagram of the system for continuous production of strontium chloride solution. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with embodiments and drawings.

[0021] like Figure 1 and Figure 2 As shown, a method for continuously producing a strontium chloride solution is based on a continuous production system of a strontium chloride solution. The method for continuously producing a strontium chloride solution comprises the following steps:

[0022] S1, process water output from process water delivery pipeline 1, strontium ore output from strontium ore delivery hopper 3, strontium chloride solution output from primary filter press 11, and filter residue washing water output from secondary filter press 12 are all simultaneously delivered to ball mill 4. That is, process water, strontium ore, strontium chloride solution, and filter residue washing water are simultaneously delivered to ball mill 4 for one-pass grinding.

[0023] S2, the ball mill 4 grinds the mixture to obtain a solid-containing slurry, and the solid-containing slurry flows into the reaction tank 5 through the solid-containing slurry inlet 5a on the upper side wall of the reaction tank 5. It should be noted that the solid-containing slurry can flow into the reaction tank 5 by natural inflow using the height difference, or can be directly transported to the reaction tank 5 using a wear-resistant pump.

[0024] S3, the dilute hydrochloric acid output from the dilute hydrochloric acid delivery pipeline 2, the strontium chloride solution output from the primary filter press 11, the filter residue washing water output from the secondary filter press 12, the washing water output from the washing tower 7, the filter washing water output from the floor trough 14, and the reaction slurry output from the stirring fine slurry outlet 5b on the upper side wall of the reaction tank 5 are all pumped into the stirring liquid inlet 5c at the bottom of the reaction tank 5 at the same time. That is, the dilute hydrochloric acid, the strontium chloride solution, the filter residue washing water, the washing water, the filter washing water and the reaction slurry are collectively used as the stirring liquid and pumped into the bottom of the reaction tank 5.

[0025] S4, the product slurry obtained after the reaction in the reaction tank 5 flows out from the product slurry outlet 5d in the middle of the side wall of the reaction tank 5, and then flows into the separation tank 6 through the separation tank feed port 6a in the middle and upper part of the side wall of the separation tank 6. It should be noted that the product slurry can flow into the separation tank 6 by natural inflow using the height difference, or can be pumped into the separation tank 6.

[0026] S5, the strontium sulfate particle slurry in the reaction tank 5 flows out from the first strontium sulfate slurry outlet 5e at the lower part of the side wall of the reaction tank 5 and flows to the belt filter 10. The strontium sulfate particles filtered by the belt filter 10 are transported to the first storage yard 15 for storage, and the filtered washing water filtered by the belt filter 10 flows into the ground trough 14 located below the belt filter 10. It should be pointed out that the strontium sulfate particles are particulate matter that does not participate in the reaction.

[0027] S6, the reactants without large particles in the separation tank 6 flow out through the circulating material outlet 6b at the upper side wall of the separation tank 6, and are pumped into the reactant inlet 6c at the bottom of the separation tank 6, and the product slurry flowing from the reaction tank 5 is mixed and stirred, and the strontium sulfate particle slurry in the separation tank 6 is washed and separated, and then flows out from the second strontium sulfate slurry outlet 6e at the lower side wall of the separation tank 6 and flows to the belt filter 10. The strontium sulfate particles filtered by the belt filter 10 are transported to the first stockpile 15 for storage, and the filtered washing water filtered by the belt filter 10 flows into the ground trough 14 located below the belt filter 10. It should be pointed out that the strontium sulfate particles are particulate matter that does not participate in the reaction, and the strontium sulfate particles can be used as a raw material for producing strontium sulfate for recycling.

[0028] S7, after the strontium chloride slurry in the separation tank 6 is pumped into the first-stage filter press 11 for filtration through the product outlet 6d at the middle and lower part of the side wall of the separation tank 6, most of the strontium chloride solution filtered by the first-stage filter press 11 flows into the strontium chloride solution storage tank 13, and another small part flows to the ball mill 4 of step S1 and the reaction tank 5 of step S3. The filter residue filtered by the first-stage filter press 11 is filtered by the second-stage filter press 12, and the filter residue washing water filtered by the second-stage filter press 12 flows to the ball mill 4 of step S1 and the reaction tank 5 of step S3. The filter residue filtered by the second-stage filter press 12 is transported to the second stockpile 17. It should be pointed out that the strontium chloride solution flowing into the strontium chloride solution storage tank 13 is more than the strontium chloride solution flowing to the ball mill 4 of step S1 and the reaction tank 5 of step S3. Through the partial reflux of the strontium chloride solution, the concentration of the produced strontium chloride solution can be increased by nearly 7%. Among them, the filter residue obtained by the primary filter press 11 can be fed to the secondary filter press 12 in two ways: 1. The filter residue obtained by the primary filter press 11 is first mixed with the process water output from the process water delivery pipeline 1 and then flows into the stirring tank 16 for stirring, and the mixed solution after stirring is then pumped into the secondary filter press 12 for filtration. 2. The filter residue sent out from the first filter residue outlet 11c enters the second stockpile 17 after two countercurrent washings, and the second washing liquid is then transported to the ball mill 4 and the reaction tank 5 through the pipeline. Both of the above methods can fully wash the filter residue, dissolve the soluble matter, and replace the free strontium chloride solution entrained in the filter residue, further improving the recovery rate of the strontium chloride solution.

[0029] S8, after the carbon dioxide gas generated in the reaction tank 5 is discharged from the reaction tank exhaust port 5f at the top of the reaction tank 5 and the carbon dioxide gas generated in the separation tank 6 is discharged from the separation tank exhaust port 6f at the top of the separation tank 6, they first enter the washing tower 7 for washing. After the washing is completed, the carbon dioxide gas is pumped by the compressor 8 to the carbon dioxide storage tank 9 for storage, wherein the process water output by the process water delivery pipeline 1 supplies water to the washing tower 7.

[0030] See also Figure 2 The continuous production system of strontium chloride solution mainly includes a process water delivery pipeline 1, a dilute hydrochloric acid delivery pipeline 2, a strontium ore delivery hopper 3, a ball mill 4, a reaction tank 5, a separation tank 6, a washing tower 7, a compressor 8, a carbon dioxide storage tank 9, a belt filter 10, a primary filter press 11, a secondary filter press 12, a strontium chloride solution storage tank 13, a trough 14, a first stockpile 15 and a second stockpile 17.

[0031] The reaction tank 5 is provided with a solid-containing slurry inlet 5a, a stirring fine slurry outlet 5b, a stirring liquid inlet 5c, a product slurry outlet 5d, a first strontium sulfate slurry outlet 5e and a reaction tank exhaust port 5f. Specifically, the reaction tank 5 comprises a reaction tank head, a reaction tank barrel portion and a reaction tank conical barrel portion which are sequentially connected from top to bottom, the reaction tank barrel portion is a cylindrical structure, the reaction tank conical barrel portion is a conical barrel structure, the reaction tank exhaust port 5f is arranged at the top of the reaction tank head, the solid-containing slurry inlet 5a and the stirring fine slurry outlet 5b are both arranged at the upper part of the circumferential side wall of the reaction tank barrel portion, the product slurry outlet 5d is arranged at the lower part of the circumferential side wall of the reaction tank barrel portion, the first strontium sulfate slurry outlet 5e is arranged on the circumferential side wall of the reaction tank conical barrel portion, and the stirring liquid inlet 5c is arranged at the bottom of the reaction tank conical barrel portion. When the solid-liquid ratio is appropriate, on the one hand, the pumping force of the first stirring pump 22 is utilized to allow the slurry containing no solid particles or little solid particles, hydrochloric acid solution and other products or water containing no solid particles in the upper and middle part of the reaction tank 5 to enter from the bottom of the reaction tank 5, forming a flushing fluid upwards, and forming sufficient countercurrent contact with the solid-containing slurry reactants entering from the upper part of the reaction tank 5, so as to quickly complete the chemical reaction that should be carried out; on the other hand, under the action of gravity, the advantage of the falling speed of particles being greater than that of other particles is utilized to naturally confine relatively coarse solids in the middle and lower part of the reaction tank 5, so that the fine particle slurry and the coarse particle slurry form a natural stratification, and the fine particles always float on the upper part of the reaction tank 5, which provides conditions for liquid stirring; at the same time, the flushing fluid formed upwards continuously flushes and disperses the ore pulp, so that the acid hydrolysis reaction in the reaction tank 5 can be quickly completed.

[0032] The separation tank 6 is provided with a separation tank feed port 6a, a circulating material outlet 6b, a reactant inlet 6c, a product outlet 6d, a second strontium sulfate slurry outlet 6e and a separation tank exhaust port 6f. The separation tank 6 comprises a separation tank head, a separation tank barrel portion and a separation tank conical barrel portion which are sequentially connected from top to bottom. The separation tank barrel portion is a cylindrical structure, the separation tank conical barrel portion is a conical barrel structure, the separation tank exhaust port 6f is arranged at the top of the separation tank head, the circulating material outlet 6b is arranged at the upper part of the circumferential side wall of the separation tank barrel portion, the separation tank feed port 6a is arranged at the middle part of the circumferential side wall of the separation tank barrel portion, the product outlet 6d is arranged at the lower part of the circumferential side wall of the separation tank barrel portion, the second strontium sulfate slurry outlet 6e is arranged on the circumferential side wall of the separation tank conical barrel portion, and the reactant inlet 6c is arranged at the bottom of the separation tank conical barrel portion. The reactants without large solid particles are drawn out from the upper part of the cylindrical part of the separation tank 6 and pumped into the bottom of the separation tank to stir the slurry flowing from the reaction tank 5. At the same time, the large particles that do not participate in the reaction in the product slurry are washed and separated. Under the action of gravity, they are naturally confined to the conical barrel part of the separation tank and then drawn out from the lower part of the conical barrel part of the separation tank to be filtered and washed by the belt filter 10. The filter residue is temporarily stored in the first yard 15, and the strontium chloride solution is output from the lower part of the cylindrical part of the separation tank to the first filter press 11.

[0033] The washing tower 7 is provided with a washing water outlet 7a, a carbon dioxide inlet 7b, a carbon dioxide outlet 7c and a washing water inlet 7d. Specifically, the carbon dioxide outlet 7c is arranged at the top of the washing tower 7, and the washing water inlet 7d is arranged at the upper part of the circumferential side wall of the washing tower 7. The washing water inlet 7d is used to supply water to the washing spray device 7e in the washing tower 7, and the process water delivery pipeline 1 supplies water to the washing water inlet 7d. The washing water outlet 7a also supplies water to the washing water inlet 7d through the pipeline, and the washing spray device 7e is arranged high enough, so that the carbon dioxide gas can be washed more fully. The carbon dioxide inlet 7b is arranged at the middle and lower part of the circumferential side wall of the washing tower 7, and the washing water outlet 7a is arranged at the lower part of the circumferential side wall of the washing tower 7. Not only can the carbon dioxide be fully washed, but also the washing water and the hydrogen chloride gas dissolved therein can be reused to further improve the utilization rate of the dilute hydrochloric acid solution.

[0034] The primary filter press 11 is provided with a first filter press inlet 11b, a first filtrate outlet 11a, a first filter residue outlet 11c and a process water replenishment inlet 11d. The secondary filter press 12 is provided with a second filter press inlet 12b, a second filtrate outlet 12a and a second filter residue outlet 12c.

[0035] A slurry pump 21 is provided on the pipeline connecting the ball mill 4 and the solid slurry inlet 5a, a first stirring pump 22 is provided on the pipeline connected to the stirring liquid inlet 5c, a second stirring pump 23 is provided on the pipeline connected to the reactant inlet 6c, a circulation pump 24 is provided on the pipeline connected to the washing water outlet 7a, and a first filter press pump 25 is provided on the pipeline connecting the product outlet 6d and the primary filter press 11. The system is simple, reliable, and reasonably arranged, thereby ensuring the transportation power of the entire system.

[0036] The process water delivery pipeline 1, the strontium ore delivery hopper 3, the first filtrate outlet 11a and the second filtrate outlet 12a can all be fed to the ball mill feed port 4a of the ball mill 4 through the pipeline, and the ball mill discharge port 4b of the ball mill 4 is fed to the solid slurry inlet 5a through the pipeline. The dilute hydrochloric acid delivery pipeline 2, the first filtrate outlet 11a, the second filtrate outlet 12a, the washing water outlet 7a, the ground trough 14 and the stirring fine slurry outlet 5b are all fed to the stirring liquid inlet 5c through the pipeline, and the product slurry outlet 5d is fed to the separation tank feed port 6a through the pipeline. The circulating material outlet 6b is fed to the reactant inlet 6c through the pipeline, and the product outlet 6d is fed to the first filter press inlet 11b through the pipeline. The first strontium sulfate slurry outlet 5e and the second strontium sulfate slurry outlet 6e are both fed to the belt filter 10 through pipelines, the filter residue filtered by the belt filter 10 is transported to the first stockpile 15 for storage, and the filter washing water filtered by the belt filter 10 flows into the ground trough 14 located below the belt filter 10. The exhaust port 5f of the reaction tank and the exhaust port 6f of the separation tank are both fed to the carbon dioxide inlet 7b of the washing tower 7 through pipelines, the washing water outlet 7a is fed to the stirring liquid inlet 5c through pipelines, and the carbon dioxide outlet 7c is fed to the compressor 8 through pipelines, and the compressor 8 is fed to the carbon dioxide storage tank 9 through pipelines. The process water delivery pipeline 1 feeds the process water replenishment inlet 11d through the pipeline, and part of the strontium chloride solution outputted from the first filtrate outlet 11a is fed to the ball mill feed inlet 4a and the stirring liquid inlet 5c through the pipeline. Most of the strontium chloride solution outputted from the first filtrate outlet 11a is fed to the strontium chloride solution storage tank 13 through the pipeline, and the first filtrate outlet 11a feeds most of the strontium chloride solution to the strontium chloride solution storage tank 13. The filter residue outputted from the first filter residue outlet 11c is mixed with water and then fed to the second filter press inlet 12b, and the filter residue outputted from the second filter residue outlet 12c falls into the second stockpile 17 by gravity.

[0037] There are two ways to feed the first filter residue outlet 11c to the second filter press inlet 12b:

[0038] Method 1:

[0039] A water mixing spraying device 11e is provided above the first filter residue outlet 11c. The water mixing spraying device 11e is replenished with water through the process water replenishing inlet 11d. The mixture of filter residue and process water sent out from the first filter residue outlet 11c is stirred in the stirring tank 16 and then pumped into the second filter press inlet 12b through the second filter press pump 26. By means of water mixing and stirring, the filter residue can be fully washed, so that the free strontium chloride solution is replaced and returned to the ball mill 4 and the reaction tank 5 through the second filtrate outlet 12b, further improving the utilization rate of the carrier water in the strontium chloride solution, and at the same time, a high-concentration strontium chloride solution is obtained.

[0040] Method 2:

[0041] The filter residue sent out from the first filter residue outlet 11c enters the second storage yard 17 after two countercurrent washings, and the second washing liquid is then transported to the ball mill feed port 4a and the stirring liquid inlet 5c through a pipeline. The filter residue can be fully washed by two countercurrent washings to dissolve the soluble matter and improve the yield of the strontium chloride solution.

[0042] Furthermore, the process water delivery pipeline 1 also supplies water to the belt filter 10 through the filter water supply pipeline 18, the first strontium sulfate slurry outlet 5e is discharged to the belt filter 10 through the strontium sulfate discharge pipeline 19, and the second strontium sulfate slurry outlet 6e is discharged to the belt filter 10 through the strontium sulfate discharge pipeline 20. The outlet of the filter water supply pipeline 18 is close to the unloading end of the belt filter 10, and the outlet of the strontium sulfate discharge pipeline 19 and the outlet of the strontium sulfate discharge pipeline 20 are both located between the outlet of the filter water supply pipeline 18 and the feeding end of the belt filter 10. The strontium sulfate slag is first filtered to filter out the entrained strontium chloride solution, and then washed by process water spraying to wash and replace the free strontium chloride solution entrained in the strontium sulfate slag, thereby further improving the recovery rate of the strontium chloride solution.

[0043] Furthermore, a foam catcher is provided inside or outside the exhaust port 5f of the reaction tank and the exhaust port 6f of the separation tank to filter out foam impurities and further improve the captured CO 2 In addition, the top of the carbon dioxide storage tank 9 is connected with a carbon dioxide delivery pipeline 27 for easy external transportation and utilization.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A method for continuously producing a strontium chloride solution, characterized in that: The following steps are involved: S1, process water output from the process water delivery pipeline (1), strontium ore output from the strontium ore delivery hopper (3), strontium chloride solution output from the primary filter press (11), and filter residue washing water output from the secondary filter press (12) are all simultaneously delivered to the ball mill (4); S2, the ball mill (4) grinds the mixture into fine powder to obtain a solid-containing slurry, and the solid-containing slurry flows into the reaction tank (5) through the solid-containing slurry inlet (5a) at the upper part of the side wall of the reaction tank (5); S3, the dilute hydrochloric acid output from the dilute hydrochloric acid delivery pipeline (2), the strontium chloride solution output from the primary filter press (11), the filter residue washing water output from the secondary filter press (12), the washing water output from the washing tower (7), the filter washing water output from the floor trough (14), and the reaction slurry output from the stirring fine slurry outlet (5b) on the upper side wall of the reaction tank (5) are all pumped into the stirring liquid inlet (5c) at the bottom of the reaction tank (5) at the same time; S4, the product slurry obtained after the reaction in the reaction tank (5) flows out from the product slurry outlet (5d) in the middle of the side wall of the reaction tank (5), and then flows into the separation tank (6) through the separation tank feed port (6a) in the middle upper part of the side wall of the separation tank (6); S5, the strontium sulfate particle slurry in the reaction tank (5) flows out from the first strontium sulfate slurry outlet (5e) at the lower part of the side wall of the reaction tank (5) and flows to the belt filter (10), the strontium sulfate particles filtered by the belt filter (10) are transported to the first stockpile (15) for storage, and the filtered washing water filtered by the belt filter (10) flows into the ground trough (14) located below the belt filter (10); S6, the reactants without large particles in the separation tank (6) flow out through the circulating material outlet (6b) at the upper part of the side wall of the separation tank (6), and are pumped into the reactant inlet (6c) at the bottom of the separation tank (6), where they are mixed and stirred with the product slurry flowing in from the reaction tank (5). The strontium sulfate particle slurry in the separation tank (6) is washed and separated, and then flows out from the second strontium sulfate slurry outlet (6e) at the lower part of the side wall of the separation tank (6) and flows to the belt filter (10). The strontium carbonate particles filtered by the belt filter (10) are transported to the first stockpile (15) for storage, and the filtered washing water filtered by the belt filter (10) flows into the ground trough (14) located below the belt filter (10); S7, the strontium chloride slurry in the separation tank (6) is pumped into the first filter press (11) for filtration through the product outlet (6d) at the middle and lower part of the side wall of the separation tank (6), a part of the strontium chloride solution filtered by the first filter press (11) flows into the strontium chloride solution storage tank (13), and the other part flows to the ball mill (4) of step S1 and the reaction tank (5) of step S3, the filter residue filtered by the first filter press (11) is further filtered by the second filter press (12), the filter residue washing water filtered by the second filter press (12) flows to the ball mill (4) of step S1 and the reaction tank (5) of step S3, and the filter residue filtered by the second filter press (12) is transported to the second storage yard (17); S8, after the carbon dioxide gas generated in the reaction tank (5) is discharged from the reaction tank exhaust port (5f) at the top of the reaction tank (5) and the carbon dioxide gas generated in the separation tank (6) is discharged from the separation tank exhaust port (6f) at the top of the separation tank (6), they first enter the washing tower (7) for washing. After the washing is completed, the compressor (8) pumps the carbon dioxide gas to the carbon dioxide storage tank (9) for storage, wherein the process water output by the process water delivery pipeline (1) supplies water to the washing tower (7).

2. A method for continuously producing a strontium chloride solution according to claim 1, characterized in that: In step S7, the filter residue obtained by the primary filter press (11) is first mixed with the process water output from the process water delivery pipeline (1) and then flows into the stirring tank (16) for stirring. The mixed solution after stirring is then pumped into the secondary filter press (12) for filtration.

3. A method for continuously producing a strontium chloride solution according to claim 1, characterized in that: In step S7, the filter residue sent out from the first filter residue outlet (11c) enters the second storage yard (17) after two countercurrent washings, and the secondary washing liquid is then transported to the ball mill (4) and the reaction tank (5) through a pipeline.

4. A method for continuously producing a strontium chloride solution according to claim 1, characterized in that: In step S7, the strontium chloride solution flowing into the strontium chloride solution storage tank (13) is greater than the strontium chloride solution flowing into the ball mill (4) of step S1 and the reaction tank (5) of step S3.

5. A method for continuously producing a strontium chloride solution according to claim 1, characterized in that: The washing tower (7) is provided with a washing water outlet (7a), a carbon dioxide inlet (7b), a carbon dioxide outlet (7c) and a washing water inlet (7d); the carbon dioxide outlet (7c) is arranged at the top of the washing tower (7) and is connected to the compressor (8) through a pipeline; the washing water inlet (7d) is arranged at the upper part of the circumferential side wall of the washing tower (7) and is connected to the process water delivery pipeline (1) through a pipeline; the carbon dioxide inlet (7b) is arranged at the middle and lower part of the circumferential side wall of the washing tower (7) and is connected to the exhaust port (5f) of the reaction tank and the exhaust port (6f) of the separation tank through a pipeline; the washing water outlet (7a) is arranged at the lower part of the circumferential side wall of the washing tower (7) and is connected to the stirring liquid inlet (5c) or the ball mill feed port (4a) through a pipeline.

6. A method for continuously producing a strontium chloride solution according to claim 5, characterized in that: A slurry pump (21) is provided on a pipeline connecting the ball mill (4) and the solid-containing slurry inlet (5a), a first stirring pump (22) is provided on a pipeline connected to the stirring liquid inlet (5c), a second stirring pump (23) is provided on a pipeline connected to the reactant inlet (6c), a circulation pump (24) is provided on a pipeline connected to the washing water outlet (7a), and a first filter press pump (25) is provided on a pipeline connecting the product outlet (6d) and the first filter press (11). The filter residue obtained by filtering the first filter press (11) is pumped into the second filter press (12) via a second filter press pump (26).

7. A method for continuously producing a strontium chloride solution according to claim 1, characterized in that: The reaction tank (5) comprises a reaction tank head, a reaction tank cylindrical portion and a reaction tank conical barrel portion which are sequentially connected from top to bottom, the reaction tank cylindrical portion is a cylindrical structure, the reaction tank conical barrel portion is a conical barrel structure, the reaction tank exhaust port (5f) is arranged at the top of the reaction tank head, the solid-containing slurry inlet (5a) and the stirring fine slurry outlet (5b) are both arranged at the upper part of the circumferential side wall of the reaction tank cylindrical portion, the product slurry outlet (5d) is arranged at the lower part of the circumferential side wall of the reaction tank cylindrical portion, the first strontium sulfate slurry outlet (5e) is arranged on the circumferential side wall of the reaction tank conical barrel portion, and the stirring liquid inlet (5c) is arranged at the bottom of the reaction tank conical barrel portion.

8. A method for continuously producing a strontium chloride solution according to claim 1, characterized in that: The separation tank (6) comprises a separation tank head, a separation tank cylindrical portion and a separation tank conical barrel portion which are sequentially connected from top to bottom, the separation tank cylindrical portion is a cylindrical structure, the separation tank conical barrel portion is a conical barrel structure, the separation tank exhaust port (6f) is arranged at the top of the separation tank head, the circulating material outlet (6b) is arranged at the upper part of the circumferential side wall of the separation tank cylindrical portion, the separation tank feed port (6a) is arranged at the middle part of the circumferential side wall of the separation tank cylindrical portion, the product outlet (6d) is arranged at the lower part of the circumferential side wall of the separation tank cylindrical portion, the second strontium sulfate slurry outlet (6e) is arranged on the circumferential side wall of the separation tank conical barrel portion, and the reactant inlet (6c) is arranged at the bottom of the separation tank conical barrel portion.

9. A method for continuously producing a strontium chloride solution according to claim 1, characterized in that: The process water delivery pipeline (1) also supplies water to the belt filter (10) via the filter water supply pipeline (18); the first strontium sulfate slurry outlet (5e) is discharged to the belt filter (10) via the strontium sulfate discharge pipeline (19); the second strontium sulfate slurry outlet (6e) is discharged to the belt filter (10) via the strontium sulfate discharge pipeline (20); the outlet of the filter water supply pipeline (18) is close to the discharge end of the belt filter (10); the outlet of the strontium sulfate discharge pipeline (19) and the outlet of the strontium sulfate discharge pipeline (20) are both located between the outlet of the filter water supply pipeline (18) and the feed end of the belt filter (10).

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