A system and method for preparing water glass based on coal gangue

Abstract

The invention relates to the technical field of compound preparation, and in particular to a system and method for preparing water glass based on coal gangue, comprising: a pretreatment module for completing pretreatment of coal gangue; a flotation module provided with a flotation tank, a bubble generating unit and a stirring unit; a pickling module; a mixing module; a sintering module; a dissolving module; a concentration module; a purification module; a detection module provided with an image acquisition unit and a laser detection unit; a control module for judging whether pretreated coal gangue particles meet preset standards according to effective flotation evaluation values, and for judging whether concentrated water glass meets preset standards according to light attenuation rates; and a method for preparing water glass based on coal gangue, thereby improving the efficiency of preparing water glass based on coal gangue.

Description

Technical Field

[0001] The invention relates to the technical field of compound preparation, and in particular to a system and method for preparing water glass based on coal gangue. Background Art

[0002] The long-term accumulation of coal gangue not only occupies a large amount of land, but also easily pollutes soil and water resources, and may even cause spontaneous combustion, emit harmful gases and dust, and pollute the atmospheric environment. Therefore, it is very necessary to achieve the reduction of coal gangue and resource utilization. As an important chemical raw material, water glass is widely used in detergents, sedimentation aids, refractory materials, soil solidifiers and other fields, and has a large market demand. Using coal gangue to prepare water glass can not only solve the problem of waste of coal gangue resources, but also realize the rational utilization of resources.

[0003] Chinese patent publication number: CN113735131B, discloses a method for efficiently preparing water glass using coal gangue, belonging to the technical field of compound preparation. The water glass is prepared by activation of coal gangue, acid leaching, separation and purification of silicon, and mixing and heating with alkali solution. Under heating conditions, the coal gangue is mixed with potassium carbonate or potassium hydroxide to achieve activation. The activated coal gangue can dissolve most of the silicon in low concentration hydrochloric acid. Potassium fluoride is selected to react with the coal gangue acid leaching solution during the separation and purification of silicon. It can be seen that the above technical solution cannot be monitored in real time and intelligently processed during the preparation of water glass. Summary of the invention

[0004] To this end, the present invention provides a system and method for preparing water glass based on coal gangue, so as to overcome the problem in the prior art of lacking real-time monitoring and effective adjustment means for the process of preparing water glass from coal gangue.

[0005] To achieve the above object, on the one hand, the present invention provides a water glass preparation system based on coal gangue, comprising:

[0006] A pre-treatment module, which is used to complete the pre-treatment of coal gangue, including a jaw crushing unit for crushing the coal gangue and a grinding unit for grinding the crushed coal gangue;

[0007] A flotation module connected to the pretreatment module, comprising a flotation tank, a bubble generating unit arranged at the bottom of the flotation tank for outputting bubbles, and a stirring unit for stirring the flotation liquid;

[0008] A pickling module, which is arranged at the output end of the flotation module and is used to pickle the gangue particles after flotation with hydrochloric acid;

[0009] A mixing module, which is arranged at the output end of the pickling module and is used to mix the coal gangue particles after the pickling treatment with soda ash;

[0010] A sintering module, which is arranged at the output end of the mixing module and is used to sinter the mixture after the mixing process to generate sodium silicate;

[0011] A dissolution module, connected to the sintering module, for dissolving the sintered sodium silicate to generate water glass;

[0012] A concentration module, connected to the dissolution module, for concentrating the water glass;

[0013] A purification module, which is arranged at the output end of the concentration module and is used to purify the concentrated water glass;

[0014] A detection module, comprising an image acquisition unit disposed above the flotation tank of the flotation module and a laser detection unit disposed at an output end of the concentration module;

[0015] A control module is respectively connected to the detection module, the pretreatment module, the flotation module, and the sintering module, and is used to determine whether the pretreated gangue particles meet the preset standards according to the effective flotation evaluation value, and to determine whether the concentrated water glass meets the preset standards according to the light attenuation rate.

[0016] Furthermore, the control module determines whether the coal gangue particles after flotation meet the preset standards according to the effective flotation evaluation value, wherein:

[0017] If the effective flotation evaluation value is less than the first preset flotation evaluation value, the control module determines that the gangue particles after flotation do not meet the preset standard and increases the grinding power of the grinding unit according to the difference between the target flotation area depth and the preset depth;

[0018] If the effective flotation evaluation value is greater than or equal to the first preset flotation evaluation value and less than the second preset flotation evaluation value, the control module determines that the gangue particles after flotation do not meet the preset standard and determines the reason for not meeting the preset standard according to the bubble stability characteristic coefficient;

[0019] If the effective flotation evaluation value is greater than or equal to the second preset flotation evaluation value, the control module determines that the pre-treated gangue particles meet the preset standard and performs acid washing on the flotation-finished gangue.

[0020] Furthermore, the effective flotation evaluation value is calculated by the following formula: ;

[0021] In the formula, P represents the effective flotation evaluation value, It represents the mineral purity mass ratio of the gangue particles after flotation, M1 represents the total mass of the gangue particles after flotation, It represents the mineral purity mass ratio of the gangue particles before flotation, and M represents the total mass of the gangue particles before flotation.

[0022] Furthermore, the control module is provided with several adjustment modes for increasing the grinding power of the grinding unit, and each adjustment mode has a different increase range of the grinding power.

[0023] Furthermore, the target flotation area depth is the area depth between flotation preset density layers.

[0024] Furthermore, the control module determines, based on the bubble stability characteristic coefficient, that the reason for not meeting the preset standard includes that the stirring of the flotation liquid does not meet the standard, or the adhesion of the bubbles does not meet the standard;

[0025] Under the condition that the stirring of the flotation liquid does not meet the standard, the operating power of the stirring unit is increased according to the difference between the preset characteristic threshold and the bubble stability characteristic coefficient;

[0026] When the bubble adhesion is not up to standard, the bubble particle size is reduced according to the difference between the bubble stability characteristic coefficient and the preset characteristic threshold value, and the flotation temperature is lowered;

[0027] The bubble stability characteristic coefficient is determined by the average rising velocity of the bubbles and the average particle size of the bubbles.

[0028] Furthermore, the reduction in the bubble size is the same as the reduction in the flotation temperature.

[0029] Furthermore, when the control module determines that the concentrated water glass does not meet a preset standard based on the light attenuation rate, the control module increases the sintering time of the sintering module according to the difference between the light attenuation rate and a preset light attenuation rate.

[0030] Furthermore, the increase range of the sintering time of the sintering module is positively correlated with the attenuation difference, wherein the attenuation difference is the difference between the light attenuation rate and a preset light attenuation rate.

[0031] On the other hand, the present invention also provides a method for preparing water glass based on coal gangue, comprising:

[0032] The pretreatment module pre-treats the gangue, including crushing the gangue with a jaw crusher and then grinding it with a grinding unit to obtain gangue particles;

[0033] The gangue particles are placed in the flotation cell. Within a preset flotation working period, the image acquisition unit collects image information on the surface of the flotation cell, including the depth of the target flotation area, the average rising rate of bubbles and the average particle size of bubbles, and the weighing unit obtains the mass of the target mineral before and after mineral processing respectively;

[0034] When the control module determines that the coal gangue particles after flotation do not meet the preset standard according to the effective flotation evaluation value, it determines the adjustment strategy of the grinding power of the grinding unit, or determines the reason for not meeting the preset standard according to the bubble stability characteristic coefficient;

[0035] When the control module determines that the pretreated gangue particles meet the preset standard, the silicon dioxide-containing gangue particles after flotation are placed in hydrochloric acid for pickling treatment and filtered to obtain pickled gangue particles;

[0036] The acid-washed gangue particles and soda ash are sintered to form sodium silicate and then subjected to infiltration treatment and concentration treatment in sequence;

[0037] When it is determined based on the light attenuation rate that the concentrated water glass does not meet the preset standard, the sintering time of the sintering module is increased;

[0038] When it is determined based on the light attenuation rate that the concentrated water glass meets the preset standard, the water glass meeting the preset standard is purified to complete the preparation of the water glass.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is provided with a pretreatment module, a flotation module, a pickling module, a mixing module, a sintering module, a dissolution module, a concentration module, and a purification module, and is also provided with a detection module including an image acquisition unit and a laser detection unit, and is used to determine whether the pretreated gangue particles meet the preset standard according to the effective flotation evaluation value, to determine the reason for not meeting the preset standard based on the bubble stability characteristic coefficient, and to determine whether the concentrated water glass meets the preset standard based on the light attenuation rate, thereby realizing real-time monitoring and effective adjustment of the process of preparing water glass from gangue;

[0040] The present invention determines whether the coal gangue particles after flotation meet the preset standards according to the effective flotation evaluation value through the control module and adopts the corresponding adjustment strategy according to the determination result, thereby improving the flotation effect of the coal gangue particles;

[0041] The present invention provides a calculation formula for an effective flotation evaluation value to quantitatively determine the coal gangue particles after flotation, thereby improving the accuracy of the determination.

[0042] The present invention is provided with several adjustment modes for increasing the grinding power of the grinding unit through the control module, and each adjustment mode has a different increase range of the grinding power, thereby realizing accurate control of the increase range of the grinding power;

[0043] The present invention determines the reason for not meeting the preset standard based on the bubble stability characteristic coefficient through a control module, and adopts adjustment means such as increasing the operating power of the stirring unit, reducing the bubble particle size, and lowering the flotation temperature according to the reason for not meeting the standard;

[0044] The present invention determines whether the concentrated water glass meets the preset standard based on the light attenuation rate through the control module, and when it is determined that it does not meet the standard, the sintering time of the sintering module is increased, thereby achieving precise control of the preparation process;

[0045] The present invention provides different adjustment methods for increasing the sintering time of the sintering module, thereby improving the sintering effect;

[0046] The present invention controls the increase range of the sintering time by setting the attenuation difference, thereby realizing the refined correction of the sintering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram of the structural connection of a water glass preparation system based on coal gangue according to an embodiment of the present invention;

[0048] Figure 2 This is a flow chart of an embodiment of the present invention for determining whether the coal gangue particles after flotation meet the preset standards;

[0049] Figure 3 This is a flow chart of an embodiment of the present invention for determining whether the concentrated water glass meets the preset standard;

[0050] Figure 4 The present invention is a flowchart of a method for preparing water glass based on coal gangue according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] It should be pointed out that the data in this embodiment are obtained by comprehensive analysis and evaluation of the historical detection data of the detection module of the present invention in the three months before this detection and the corresponding historical detection results. It can be understood by those skilled in the art that the determination method of the system of the present invention for the above-mentioned single parameter can be to select the value with the highest proportion as the preset standard parameter according to the data distribution, use weighted summation to use the obtained value as the preset standard parameter, substitute each historical data into a specific formula and use the value obtained by the formula as the preset standard parameter or other selection methods, as long as the system of the present invention can clearly define the different specific situations in the single determination process through the obtained values.

[0053] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0054] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively a schematic diagram of the structural connection of a water glass preparation system based on coal gangue according to an embodiment of the present invention; a flow chart of determining whether the coal gangue particles after flotation meet the preset standards according to an embodiment of the present invention; a flow chart of determining whether the water glass after concentration meets the preset standards according to an embodiment of the present invention; and a flow chart of a method for preparing water glass based on coal gangue according to an embodiment of the present invention.

[0055] The present invention provides a system for preparing water glass based on coal gangue, comprising:

[0056] A pre-treatment module, which is used to complete the pre-treatment of coal gangue, including a jaw crushing unit for crushing the coal gangue and a grinding unit for grinding the crushed coal gangue;

[0057] A flotation module connected to the pretreatment module, comprising a flotation tank, a bubble generating unit arranged at the bottom of the flotation tank for outputting bubbles, and a stirring unit for stirring the flotation liquid;

[0058] A pickling module, which is arranged at the output end of the flotation module and is used to pickle the gangue particles after flotation with hydrochloric acid;

[0059] A mixing module, which is arranged at the output end of the pickling module and is used to mix the coal gangue particles after the pickling treatment with soda ash;

[0060] A sintering module, which is arranged at the output end of the mixing module and is used to sinter the mixture after the mixing process to generate sodium silicate;

[0061] A dissolution module, connected to the sintering module, for dissolving the sintered sodium silicate to generate water glass;

[0062] A concentration module, connected to the dissolution module, for concentrating the water glass;

[0063] A purification module, which is arranged at the output end of the concentration module and is used to purify the concentrated water glass;

[0064] A detection module, comprising an image acquisition unit disposed in the flotation module and a laser detection unit disposed in the concentration module;

[0065] A control module is respectively connected to the detection module, the pretreatment module, the flotation module, and the sintering module, and is used to determine whether the pretreated gangue particles meet the preset standards according to the effective flotation evaluation value, and to determine whether the concentrated water glass meets the preset standards according to the light attenuation rate.

[0066] Specifically, the control module determines whether the coal gangue particles after flotation meet the preset standards according to the effective flotation evaluation value, wherein:

[0067] If the effective flotation evaluation value is less than the first preset flotation evaluation value, the control module determines that the gangue particles after flotation do not meet the preset standard and increases the grinding power of the grinding unit according to the difference between the target flotation area depth and the preset depth;

[0068] If the effective flotation evaluation value is greater than or equal to the first preset flotation evaluation value and less than the second preset flotation evaluation value, the control module determines that the gangue particles after flotation do not meet the preset standard and determines the reason for not meeting the preset standard according to the bubble stability characteristic coefficient;

[0069] If the effective flotation evaluation value is greater than or equal to the second preset flotation evaluation value, the control module determines that the pre-treated gangue particles meet the preset standard and performs acid washing on the flotation-finished gangue.

[0070] Specifically, the effective flotation evaluation value is calculated by the following formula:

[0071] ;

[0072] In the formula, P represents the effective flotation evaluation value, It represents the mineral purity mass ratio of the gangue particles after flotation, M1 represents the total mass of the gangue particles after flotation, It represents the mineral purity mass ratio of the gangue particles before flotation, and M represents the total mass of the gangue particles before flotation.

[0073] Among them, the first preset flotation evaluation value is set to 0.15, and the second preset flotation evaluation value is set to 0.34.

[0074] Specifically, the control module is provided with several increasing modes for increasing the grinding power of the grinding unit, wherein:

[0075] If the difference between the target flotation area depth and the preset depth is less than the first preset depth difference of 6.68 mm, the control module increases the grinding power of the grinding unit using a first preset power adjustment coefficient of 1.08;

[0076] If the difference between the target flotation area depth and the preset depth is greater than or equal to the first preset depth difference of 6.68 mm and less than the second preset depth difference of 11.25 mm, the control module increases the grinding power of the grinding unit using the second preset power adjustment coefficient of 1.25;

[0077] If the difference between the target flotation area depth and the preset depth is greater than or equal to a second preset depth difference of 11.25 mm, the control module increases the grinding power of the grinding unit using a third preset power adjustment coefficient of 1.58.

[0078] The depth of the target flotation area is determined by the different depths of coal gangue particles containing different silica purities in the flotation solution, wherein coal gangue particles with high silica purity float close to the surface, coal gangue particles with low silica purity float far from the surface, and coal gangue particles containing no silica sink to the bottom of the tank.

[0079] Specifically, the flotation agent in the flotation tank can be pine oil, which is not specifically limited and only needs to meet the flotation requirements.

[0080] Specifically, the control module determines the reasons for not meeting the preset standard based on the bubble stability characteristic coefficient, including:

[0081] If the bubble stability characteristic coefficient is less than a preset characteristic threshold value of 0.82, the control module determines that the reason for not meeting the preset standard is that the stirring of the flotation liquid does not meet the standard, and increases the operating power of the stirring unit according to the difference between the preset characteristic threshold value and the bubble stability characteristic coefficient;

[0082] If the bubble stability characteristic coefficient is greater than or equal to the preset characteristic threshold, the control module determines that the reason for not meeting the preset standard is that the bubble adhesion does not meet the standard, and reduces the bubble particle size according to the difference between the bubble stability characteristic coefficient and the preset characteristic threshold, and reduces the flotation temperature, wherein the bubble particle size can be reduced by increasing the ventilation flow rate per unit time of the bubble generating unit;

[0083] Wherein, the bubble stability characteristic coefficient is calculated by the following formula:

[0084] ;

[0085] In the formula, B represents the bubble stability characteristic coefficient; V represents the average rising rate of the bubble; D represents the average particle size of the bubble; V0 represents the standard value of the average rising rate of the bubble, and V0=6mm / s is set; D0 represents the standard value of the average particle size of the bubble, and D0=0.2mm is set; β represents the influence index of the average rising rate of the bubble, and β=1.17 is set; λ represents the influence index of the average particle size of the bubble, and λ=1.03 is set;

[0086] The preset feature threshold is set to 0.82.

[0087] Specifically, the reduction in bubble size is the same as the reduction in flotation temperature.

[0088] Specifically, the control module determines whether the concentrated water glass meets the preset standard based on the light attenuation rate, wherein:

[0089] If the light attenuation rate is less than the preset light attenuation rate, the control module determines that the concentrated water glass meets the preset standard and completes the preparation of the water glass according to the current preparation parameters;

[0090] If the light attenuation rate is greater than or equal to the preset light attenuation rate, the control module determines that the concentrated water glass does not meet the preset standard and increases the sintering time of the sintering module according to the difference between the light attenuation rate and the preset light attenuation rate.

[0091] Among them, the preset light attenuation rate is set to 32.7%.

[0092] Specifically, the increase in the sintering time of the sintering module is positively correlated with the attenuation difference. For example, the increase in the working time of the sintering module is set to △T, and the difference between the light attenuation rate and the preset light attenuation rate is set to △Φ, then △T=α×△Φ, α is the time adjustment coefficient, and α is set to 1.02. It can be understood that the greater the difference between the sub-light attenuation rate and the preset light attenuation rate, the greater the increase in the working time of the sintering module.

[0093] A method for preparing water glass based on coal gangue according to an embodiment of the present invention comprises:

[0094] Step S1, the pretreatment module pre-treats the gangue, including crushing the gangue with a jaw crusher and then grinding it with a grinding unit to obtain gangue particles;

[0095] Step S2, placing the gangue particles into the flotation tank, and within a preset flotation working period, the image acquisition unit collects image information of the flotation tank surface, including the depth of the target flotation area, the average rising rate of bubbles and the average particle size of bubbles, and the weighing unit obtains the mass of the target mineral before and after mineral processing;

[0096] Step S3, when the control module determines that the coal gangue particles after flotation do not meet the preset standard according to the effective flotation evaluation value, it determines the adjustment strategy of the grinding power of the grinding unit, or determines the reason for not meeting the preset standard according to the bubble stability characteristic coefficient;

[0097] Step S4, when the control module determines that the pretreated gangue particles meet the preset standard, the silicon dioxide-containing gangue particles after flotation are placed in hydrochloric acid for pickling treatment and filtered to obtain pickled gangue particles;

[0098] Step S5, sequentially performing an infiltration treatment and a concentration treatment on the acid-washed coal gangue particles and soda ash after sintering to generate sodium silicate;

[0099] Step S6, when it is determined based on the light attenuation rate that the concentrated water glass does not meet the preset standard, the sintering time of the sintering module is increased;

[0100] Step S7, when it is determined based on the light attenuation rate that the concentrated water glass meets the preset standard, the water glass meeting the preset standard is purified to complete the preparation of the water glass.

[0101] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water glass preparation system based on coal gangue, characterized in that: include: A pre-treatment module, which is used to complete the pre-treatment of coal gangue, including a jaw crushing unit for crushing the coal gangue and a grinding unit for grinding the crushed coal gangue; A flotation module connected to the pretreatment module, comprising a flotation tank, a bubble generating unit arranged at the bottom of the flotation tank for outputting bubbles, and a stirring unit for stirring the flotation liquid; A pickling module, which is arranged at the output end of the flotation module and is used to pickle the gangue particles after flotation with hydrochloric acid; A mixing module, which is arranged at the output end of the pickling module and is used to mix the coal gangue particles after the pickling treatment with soda ash; A sintering module, which is arranged at the output end of the mixing module and is used to sinter the mixture after the mixing process to generate sodium silicate; A dissolution module, connected to the sintering module, for dissolving the sintered sodium silicate to generate water glass; A concentration module, connected to the dissolution module, for concentrating the water glass; A purification module, which is arranged at the output end of the concentration module and is used to purify the concentrated water glass; A detection module, comprising an image acquisition unit disposed above the flotation tank of the flotation module and a laser detection unit disposed at an output end of the concentration module; a control module, which is connected to the detection module, the pretreatment module, the flotation module, and the sintering module respectively, and is used to determine whether the coal gangue particles after flotation meet the preset standard according to the effective flotation evaluation value, and to determine whether the concentrated water glass meets the preset standard according to the light attenuation rate; The control module determines whether the coal gangue particles after flotation meet the preset standards according to the effective flotation evaluation value, wherein: If the effective flotation evaluation value is less than the first preset flotation evaluation value, the control module determines that the gangue particles after flotation do not meet the preset standard and increases the grinding power of the grinding unit according to the difference between the target flotation area depth and the preset depth; If the effective flotation evaluation value is greater than or equal to the first preset flotation evaluation value and less than the second preset flotation evaluation value, the control module determines that the coal gangue particles after flotation do not meet the preset standard and determines the reason for not meeting the preset standard according to the bubble stability characteristic coefficient; If the effective flotation evaluation value is greater than or equal to the second preset flotation evaluation value, the control module determines that the coal gangue particles after flotation meet the preset standard and performs acid washing on the coal gangue after flotation; The effective flotation evaluation value is calculated by the following formula: ; In the formula, P represents the effective flotation evaluation value, It represents the mineral purity mass ratio of the gangue particles after flotation, M1 represents the total mass of the gangue particles after flotation, It represents the mineral purity mass ratio of the gangue particles before flotation, and M represents the total mass of the gangue particles before flotation.

2. The coal gangue-based water glass preparation system according to claim 1, characterized in that: The control module is provided with several increasing modes for increasing the grinding power of the grinding unit, wherein: If the difference between the target flotation area depth and the preset depth is less than a first preset depth difference, the control module increases the grinding power of the grinding unit using a first preset power adjustment coefficient; If the difference between the target flotation area depth and the preset depth is greater than or equal to the first preset depth difference and less than the second preset depth difference, the control module increases the grinding power of the grinding unit using the second preset power adjustment coefficient; If the difference between the target flotation area depth and the preset depth is greater than or equal to a second preset depth difference, the control module increases the grinding power of the grinding unit using a third preset power adjustment coefficient.

3. The coal gangue-based water glass preparation system according to claim 2, characterized in that: The target flotation area depth is the area depth between the flotation preset density layers.

4. The coal gangue-based water glass preparation system according to claim 3, characterized in that: The control module determines, based on the bubble stability characteristic coefficient, that the reason for not meeting the preset standard includes that the stirring of the flotation liquid does not meet the standard, or the adhesion of the bubbles does not meet the standard; Under the condition that the stirring of the flotation liquid does not meet the standard, the operating power of the stirring unit is increased according to the difference between the preset characteristic threshold and the bubble stability characteristic coefficient; When the bubble adhesion is not up to standard, the bubble particle size is reduced according to the difference between the bubble stability characteristic coefficient and the preset characteristic threshold value, and the flotation temperature is lowered; The bubble stability characteristic coefficient is determined by the average rising velocity of the bubbles and the average particle size of the bubbles.

5. The coal gangue-based water glass preparation system according to claim 4, characterized in that: The reduction in bubble size is the same as the reduction in flotation temperature.

6. The coal gangue-based water glass preparation system according to claim 5, characterized in that: When the control module determines that the concentrated water glass does not meet the preset standard based on the light attenuation rate, the control module increases the sintering time of the sintering module according to the difference between the light attenuation rate and the preset light attenuation rate.

7. The coal gangue-based water glass preparation system according to claim 6, characterized in that: The increase range of the sintering time of the sintering module is positively correlated with the attenuation difference, wherein the attenuation difference is the difference between the light attenuation rate and a preset light attenuation rate.

8. A method for preparing water glass based on coal gangue applied to the system according to any one of claims 1 to 7, characterized in that: include: The pretreatment module pre-treats the gangue, including crushing the gangue with a jaw crusher and then grinding it with a grinding unit to obtain gangue particles; The gangue particles are placed in a flotation tank, and within a preset flotation working period, an image acquisition unit collects image information on the surface of the flotation tank, including the depth of the target flotation area, the average rising rate of bubbles and the average particle size of the bubbles, and a weighing unit obtains the mass of the target mineral before and after mineral processing; When the control module determines that the coal gangue particles after flotation do not meet the preset standard according to the effective flotation evaluation value, it determines the adjustment strategy of the grinding power of the grinding unit, or determines the reason for not meeting the preset standard according to the bubble stability characteristic coefficient; When the control module determines that the coal gangue particles after flotation meet the preset standard, the coal gangue particles containing silicon dioxide after flotation are placed in hydrochloric acid for pickling treatment and filtered to obtain pickled coal gangue particles; The acid-washed gangue particles and soda ash are sintered to form sodium silicate and then subjected to infiltration treatment and concentration treatment in sequence; When it is determined based on the light attenuation rate that the concentrated water glass does not meet the preset standard, the sintering time of the sintering module is increased; When it is determined based on the light attenuation rate that the concentrated water glass meets the preset standard, the water glass meeting the preset standard is purified to complete the preparation of the water glass.

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