CN213265743U - Magnesium removing device capable of preparing high-concentration and low-magnesium-content phosphoric acid - Google Patents
Magnesium removing device capable of preparing high-concentration and low-magnesium-content phosphoric acid Download PDFInfo
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- CN213265743U CN213265743U CN202022146115.5U CN202022146115U CN213265743U CN 213265743 U CN213265743 U CN 213265743U CN 202022146115 U CN202022146115 U CN 202022146115U CN 213265743 U CN213265743 U CN 213265743U
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Abstract
The utility model discloses a magnesium removal device capable of preparing phosphoric acid with high concentration and low magnesium content, belonging to the technical field of magnesium removal. The device comprises a primary clear liquid tank, a secondary clear liquid tank, a clear liquid storage tank, an acidification reaction tank, an acidification liquid storage tank, a slurry tank, a demagging reaction tank, a primary thickening tank, a primary repulping tank, a secondary thickening tank, a desliming machine, a secondary repulping tank and a concentrate slurry storage tank which are sequentially connected, wherein a clear liquid outlet of the primary thickening tank is connected with the primary clear liquid tank, a clear liquid outlet of the secondary thickening tank is connected with the secondary clear liquid tank, the primary clear liquid tank and the secondary clear liquid tank are both connected with the clear liquid storage tank, the primary clear liquid tank, the acidification reaction tank, the acidification liquid storage tank and the demagging reaction tank are sequentially connected, a mud water outlet of the desliming machine is connected with a feed inlet of the primary thickening tank, a feed inlet of the secondary repulping tank is connected with a sediment outlet of the secondary thickening tank, the primary repulping tank is connected with a. Has better magnesium removal effect.
Description
Technical Field
The utility model belongs to the technical field of take off the magnesium, in particular to take off magnesium device that can prepare high concentration and low magnesium content phosphoric acid.
Background
Phosphorus is an essential element for crops. With the development of science and technology, the use of phosphorus is also expanding. The phosphorite resource is an important basic raw material for developing the phosphorization industry, the main mineral components of the phosphorite are collophanite and microcrystalline apatite, and the secondary minerals comprise quartz, dolomite, calcite, feldspar chippings, carbon sludge, a small amount of glauconite and the like. The phosphate rock is mainly used for preparing phosphoric acid, and the phosphoric acid is used as an intermediate product of a final chemical product or other phosphorus chemical products, and plays a great role in the development of national economy. The acid method utilizes the difference of the reactivity of dolomite and phosphorite with acidic substances. There are many kinds of acidic substances, but the acidulant has no comparable advantages as the acidic substance source in the viewpoints of cheap and easily available raw materials, simple process equipment and economic rationality. In the solution after the acid method magnesium removal, the main component except part of impurities is magnesium salt.
For example, patent No. CN 201410610969.0 discloses a method for co-producing ammonium phosphate and magnesium hydroxide, which comprises the following steps:
(1) preparing magnesium-containing phosphorite slurry into slurry with mass concentration of 35-55%, heating to 40-60 ℃, adding a magnesium removing agent into the slurry under stirring, reacting for 2-3 hours, controlling the pH of the end-point slurry to be 4.5-5.0, removing magnesium in phosphorite, performing solid-liquid separation, using a solid phase for producing phosphoric acid, and recycling a liquid phase as the magnesium removing agent or/and entering a magnesium hydroxide production device; the magnesium removing agent comprises an acidifier and a magnesium salt.
(2) And (2) sending the liquid phase separator with the proper concentration obtained in the step (1) into a magnesium hydroxide production device, reacting with ammonia for primary precipitation, controlling the pH value to be 8.5-9.5, reacting for 20-40 minutes, performing solid-liquid separation, sending a primary filter cake into an ammonium phosphate production device, performing secondary precipitation on a primary filtrate and ammonia, controlling the reaction temperature to be 35-50 ℃, reacting for 2-3.5 hours, performing solid-liquid separation, purifying and drying a secondary filter cake to obtain a magnesium hydroxide product, and using the secondary filtrate in the grinding process of phosphate ore or/and washing the solid phase separator obtained in the step (1).
(3) And (2) sending the solid phase separator obtained in the step (1) into a phosphoric acid production device to produce phosphoric acid, and sending the prepared phosphoric acid into an ammonium phosphate production device to react with ammonia to prepare ammonium phosphate.
The applicant has found two problems in the demagging carried out with the aforementioned process:
(1) after the magnesium removal, if the solid-liquid separation is carried out by adopting filter pressing or belt type filtration and the like, the operation is difficult or the efficiency is low;
(2) if a thickener is adopted for solid-liquid separation, the separated sediment is thinner, so that more magnesium is carried, the concentration of the prepared phosphoric acid is low, and the subsequent energy consumption is higher.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the embodiment of the utility model provides a magnesium removal device capable of preparing phosphoric acid with high concentration and low magnesium content, which can obtain phosphorite pulp with the magnesium content of less than 0.8 percent and the density of 1.76-1.82 g/ml. The technical scheme is as follows:
the embodiment of the utility model provides a demagging device that can prepare high concentration and low magnesium content phosphoric acid, the device includes once clear solution groove, secondary clear solution groove, clear solution storage tank, acidizing reaction tank, acidizing fluid storage tank and the ore pulp groove, the demagging reaction tank, once dense pond, the repulping groove of once, secondary dense pond 1, at least one desliming machine 2, secondary repulping groove 3 and refined pulp storage tank 4 that connect gradually through the pipeline, the clear solution export of once dense pond is connected with once clear solution groove through the pipeline, the clear solution export of secondary dense pond 1 is connected with secondary clear solution groove through the pipeline, once clear solution groove and secondary clear solution groove all are connected with clear solution storage tank through the pipeline, once clear solution groove, acidizing reaction tank, acidizing fluid storage tank and demagging reaction tank connect gradually through the pipeline, the muddy water export of desliming machine 2 is connected with the feed inlet of once dense pond through the pipeline, the feeding hole of the secondary repulping tank 3 is connected with a sediment outlet of the secondary thickening tank 1 through a pipeline, the primary repulping tank is connected with a phosphogypsum backwater system through a pipeline, and the acidification reaction tank is connected with a sulfuric acid supply device through a pipeline.
Wherein, the embodiment of the utility model provides an in once again the dressing trough and the secondary is equipped with the agitator in the dressing trough 3 again.
Further, the embodiment of the utility model provides an in the secondary dense pond 1 the deposit export through take the pressure to strain the pipeline of feed pump 8 and be connected with the feed inlet of desliming machine 2.
Further, the embodiment of the utility model provides a magnesium removal device still includes the mud water collecting vat 5 of feed inlet one side of desliming machine 2, the below of desliming machine 2 is equipped with the slot 6 of collecting mud water, slot 6 is located desliming machine 2's mud water export under and its mud export by desliming machine 2 is to mud water collecting vat 5 down to one side, mud water collecting vat 5 passes through the pipeline and is connected with the feed inlet in dense pond once.
Specifically, the embodiment of the utility model provides an in the lateral wall slope of 6 both sides of slot set up and from top to bottom be close to gradually, and the lateral wall of its both sides is close to gradually by the mud export of desliming machine 2 to the feed inlet of desliming machine 2.
Further, the embodiment of the utility model provides an in a plurality of desliming machines 2 set up side by side and one side of its mud export is equipped with collection belt 7 and is used for collecting mud, mud water collecting vat 5 perpendicular to desliming machine 2 sets up the muddy water that is used for collecting all slots 6, collection belt 7 perpendicular to desliming machine 2 sets up, secondary repulping trough 3 locates under collection belt 7 one end.
Specifically, the model of the desliming machine 2 in the embodiment of the present invention is 4DYQN3500GL 6.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the embodiment of the utility model provides a magnesium removal device capable of preparing phosphoric acid with high concentration and low magnesium content, which adopts two-stage thickening to carry out solid-liquid separation, and can reduce the magnesium content of ore pulp to below 0.9%; the ore pulp is further treated by a desliming machine, the density of the ore pulp can be increased to 1.76-1.82 g/ml, and the magnesium content can be reduced to below 0.8%; furthermore, the concentration of the wet-process phosphoric acid can be increased from the conventional 20 percent to 24 to 25 percent.
Drawings
FIG. 1 is a schematic block diagram of a magnesium removal device capable of producing phosphoric acid with high concentration and low magnesium content according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a part of the structure of a magnesium removal device capable of producing phosphoric acid with high concentration and low magnesium content according to an embodiment of the present invention;
FIG. 3 is a top view of a trench;
FIG. 4 is a transverse cross-sectional view of a trench;
fig. 5 is a longitudinal sectional view of a groove.
In the figure: 1 secondary thickening tank, 2 desliming machine, 3 secondary repulping tank, 4 concentrate slurry storage tank, 5 muddy water collecting tank, 6 grooves, 7 collecting belt, 8 filter pressing feed pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the embodiment of the utility model provides a can prepare demagging device of high concentration and low magnesium content phosphoric acid, the device includes once clear liquid groove, secondary clear liquid groove, the clear liquid storage tank, the acidizing reaction tank, acidizing liquid storage tank and the ore pulp groove that connects gradually through the pipeline, demagging reaction tank, dense pond, repulping groove once more, dense pond 1 of secondary (the deposit divides two tunnel outputs to desliming machine 2 all the way, another way output to the secondary repulping groove 3, set up valve group on it and gate), at least one desliming machine 2, secondary repulping groove 3 and refined ore pulp storage tank 4 etc.. The device comprises a primary thickening tank, a secondary thickening tank, a primary clear liquid tank, a secondary clear liquid tank, a clear liquid storage tank, a primary clear liquid tank, a secondary clear liquid tank, a primary clear liquid tank, an acidification reaction tank, an acidification liquid storage tank and a magnesium removal reaction tank, wherein a clear liquid outlet (the density is about 1.05 g/ml) of the primary thickening tank is connected with the primary clear liquid tank through a pipeline and used for collecting and storing primary clear liquid, a clear liquid outlet (the density is about 1.04 g/ml) of the secondary thickening tank 1 is connected with the secondary clear liquid tank through a pipeline and used for collecting and storing secondary clear liquid, the primary clear liquid tank and the secondary clear liquid tank are connected with the clear liquid storage tank through pipelines and used for collecting and storing primary clear liquid and secondary clear. The mud-water outlet of the deslimer 2 is connected with the feed inlet of the primary thickening tank through a pipeline (a mud-water collecting tank 5 can be arranged between the mud-water outlet and the primary thickening tank) for recycling the separated mud-water, and the feed inlet of the secondary reslurry tank 3 is connected with the sediment outlet of the secondary thickening tank 1 through a pipeline (simultaneously, the feed inlet is connected with the mud outlet of the deslimer 2 through a collecting belt) for diluting the mud output by the deslimer 2 to the density of 1.76-1.82 g/ml so as to facilitate conveying and subsequent wet reaction. The primary repulping tank is connected with a phosphogypsum backwater system through a pipeline and is used for diluting the sediment of the primary thickening tank (the volume of the added phosphogypsum backwater is almost the same as that of the sediment), and the acidification reaction tank is connected with a sulfuric acid supply device through a pipeline (process water, such as phosphogypsum backwater, can be supplemented as required) and is used for preparing the magnesium removing agent.
Wherein, the embodiment of the utility model provides an in once again the dressing trough and the secondary is equipped with the agitator in the dressing trough 3 again.
Further, referring to fig. 2, the sediment outlet of the secondary thickening tank 1 in the embodiment of the present invention is connected to the feed inlet of the desliming machine 2 through the pipeline with the pressure filtering feed pump 8.
Further, referring to fig. 2-5, the magnesium removal device provided by the embodiment of the present invention further includes a slurry collecting tank 5 on one side of the feed inlet of the deslimer 2, a groove 6 (arranged parallel to the deslimer 2) for collecting clear liquid is provided below the deslimer 2, the groove 6 is located under the slurry outlet of the deslimer 2, and the slurry outlet of the deslimer 2 is inclined downward to the slurry collecting tank 5 (communicated with the upper portion of the slurry collecting tank 5). The muddy water collecting tank 5 is connected with a feeding hole of the primary thickening tank through a pipeline.
Specifically, referring to fig. 2-5, in order to ensure the collection effect and the fluidity of the muddy water, the side walls on both sides of the groove 6 are inclined and gradually close from top to bottom, and the side walls on both sides are gradually close to the feed inlet of the deslimer 2 from the slurry outlet of the deslimer 2.
Further, referring to fig. 2, in the embodiment of the present invention, a plurality of deslimers 2 (specifically, two, one side of the primary dense pool of 45m specification) are arranged side by side and one side of the slurry outlet thereof is provided with a collecting belt 7 for collecting slurry, a slurry collecting tank 5 is arranged perpendicular to the deslimers 2 for collecting slurry of all the grooves 6, the collecting belt 7 (located under the slurry outlet of the deslimers 2) is arranged perpendicular to the deslimers 2, and a secondary repulping tank 3 (located under the slurry outlet of the deslimers 2) is arranged under one end of the collecting belt 7.
Specifically, the model of the desliming machine 2 in the embodiment of the utility model is 4DYQN3500GL6, the width of the filter belt is 3500mm, the slurry treatment capacity is 110-45 tons/h and the yield of the filter cake is 30-45 tons/h when being planted at 150 m.
In the embodiment, a pump, a valve, a flowmeter, and/or the like are/is provided on the pipeline as required.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. A magnesium removal device capable of preparing phosphoric acid with high concentration and low magnesium content is characterized by comprising a primary clear liquid tank, a secondary clear liquid tank, a clear liquid storage tank, an acidification reaction tank, an acidification liquid storage tank, a slurry tank, a magnesium removal reaction tank, a primary thickening tank, a primary repulping tank, a secondary thickening tank (1), at least one deslimer (2), a secondary repulping tank (3) and a concentrate slurry storage tank (4) which are sequentially connected through pipelines, wherein a clear liquid outlet of the primary thickening tank is connected with the primary clear liquid tank through a pipeline, a clear liquid outlet of the secondary thickening tank (1) is connected with the secondary clear liquid tank through a pipeline, the primary clear liquid tank and the secondary clear liquid tank are both connected with the clear liquid storage tank through pipelines, the primary clear liquid tank, the acidification reaction tank, the acidification liquid storage tank and the magnesium removal reaction tank are sequentially connected through a pipeline, a muddy water outlet of the deslimer (2) is connected with a feed inlet of the primary thickening tank through a pipeline, the feed inlet of the secondary repulping tank (3) is connected with a sediment outlet of the secondary thickening tank (1) through a pipeline, the primary repulping tank is connected with a phosphogypsum backwater system through a pipeline, and the acidification reaction tank is connected with a sulfuric acid supply device through a pipeline.
2. The magnesium removal device capable of producing phosphoric acid with high concentration and low magnesium content according to claim 1, wherein the primary repulping tank and the secondary repulping tank (3) are provided with stirrers.
3. The magnesium removal device capable of preparing phosphoric acid with high concentration and low magnesium content according to claim 1, characterized in that the sediment outlet of the secondary thickening tank (1) is connected with the feed inlet of the deslimer (2) through a pipeline with a pressure filter feeding pump (8).
4. The magnesium removal device capable of preparing phosphoric acid with high concentration and low magnesium content according to claim 3, further comprising a mud-water collection tank (5) at one side of the feed inlet of the deslimer (2), wherein a groove (6) for collecting mud water is arranged below the deslimer (2), the groove (6) is positioned right below the mud-water outlet of the deslimer (2) and is inclined downwards from the mud outlet of the deslimer (2) to the mud-water collection tank (5), and the mud-water collection tank (5) is connected with the feed inlet of the primary thickening tank through a pipeline.
5. The magnesium removal device for preparing phosphoric acid with high concentration and low magnesium content according to claim 4, wherein the side walls of the two sides of the groove (6) are obliquely arranged and gradually close from top to bottom, and the side walls of the two sides are gradually close from the slurry outlet of the desliming machine (2) to the feed inlet of the desliming machine (2).
6. The magnesium removal device capable of preparing phosphoric acid with high concentration and low magnesium content according to claim 5, characterized in that a plurality of deslimers (2) are arranged side by side and one side of the slurry outlet is provided with a collection belt (7) for collecting slurry, the slurry water collection tank (5) is arranged perpendicular to the deslimers (2) for collecting slurry water of all the grooves (6), the collection belt (7) is arranged perpendicular to the deslimers (2), and the secondary repulping tank (3) is arranged right below one end of the collection belt (7).
7. The magnesium removal device capable of producing phosphoric acid with high concentration and low magnesium content according to claim 1, wherein the deslimer (2) has a model number of 4DYQN3500GL 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022146115.5U CN213265743U (en) | 2020-09-27 | 2020-09-27 | Magnesium removing device capable of preparing high-concentration and low-magnesium-content phosphoric acid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022146115.5U CN213265743U (en) | 2020-09-27 | 2020-09-27 | Magnesium removing device capable of preparing high-concentration and low-magnesium-content phosphoric acid |
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| CN213265743U true CN213265743U (en) | 2021-05-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113800956A (en) * | 2021-10-27 | 2021-12-17 | 湖北祥云(集团)化工股份有限公司 | Method and device for producing calcium magnesium phosphate fertilizer by removing magnesium clear liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113800956A (en) * | 2021-10-27 | 2021-12-17 | 湖北祥云(集团)化工股份有限公司 | Method and device for producing calcium magnesium phosphate fertilizer by removing magnesium clear liquid |
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