AU2020444462B2 - System for controlling powder particle component and particle size and control method of the system - Google Patents
System for controlling powder particle component and particle size and control method of the system Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
- C04B7/52—Grinding ; After-treatment of ground cement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
- C04B7/52—Grinding ; After-treatment of ground cement
- C04B7/522—After-treatment of ground cement
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
- C04B7/52—Grinding ; After-treatment of ground cement
- C04B7/527—Grinding ; After-treatment of ground cement obtaining cements characterised by fineness, e.g. by multi-modal particle size distribution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
Abstract
The present disclosure relates to a system for controlling powder particle component and
particle size and a control method for the system for controlling, said system for controlling
5 includes a material bed pulverizing unit, a classification unit, a fine grinding unit, and a mixing
unit that are sequentially connected, the material bed pulverizing unit is provided for
pulverizing the initial raw materials into material particles and then deliver them to the
classification unit, the classification unit is provided for classifying the material particles into
particle groups with different particle size distributions, after the classification, the particle
0 groups with different particle size distributions involve particles in fine-grain-size interval,
medium-grain-size interval and coarse-grain-size interval, the particles in medium-grain-size
interval are ground through the fine grinding unit to obtain particles in micro-grain-size interval
with an average particle size smaller than that of the particles in fine-grain-size interval. The
present disclosure adopts a mixed grinding technology based on material bed pulverizing, it
5 uses the difference in grindability of different materials, and the powder component and particle
size in different particle size intervals can all be manual controlled through the grinding and
mixing of the system unit, so as to achieve the best application effect of the powder particle.
Description
[0001] The present disclosure relates to the technical field of powder particle component and particle size control, in particular to a system for controlling powder particle component and particle size and a control method of the system.
o BACKGROUND
[0002] Cement is a commonly used building material. China is the world's largest cement producing country. In 2018, approximately 2.2 billion tons of cement is produced in China, accounting for 56% of the world's capacity. China's cement development has promoted the construction and development of infrastructure, real estate, industry and other fields, while also consuming a large number of energy and resources. Therefore, in recent years, a large number of researches have been carried out regarding high efficiency, low energy and resource consuming cement production technologies, and a large number of technological advances have been made. Especially in the research and development of key technologies for the "two second generations" of cement, a large number of cement production technologies with international leading level come forth.
[0003] Cement is of hydrated cementing materials. Its raw materials are cement clinker (or clinker for short) and various low-value auxiliary admixtures. Among them, limestone is the most common admixture with cheap price. The finished cement is composed of micron-level powdery particles. According to research, the strength of the finished cement product mainly comes from clinker particles with a particle size of 3-32ptm, and further research has pointed out that the most fundamental strength comes from clinker particles with a particle size of 8-24pm, though auxiliary admixtures partially have certain activity, its main functions is still to act as the mixture between clinker particles. Therefore, if the clinker is ground too coarsely or too finely, it will be wasted due to the inability to exert the cementing strength, and the exceeded proportion of the admixture in the interval of 3-32ptm will also cause the degradation of cement performance. Therefore, the most ideal status is: cement clinker is mainly distributed in the interval of 3-32pm, and inactive low-value admixtures are used for filling the interval below 3pm and above 32pm. At the same time, the overall particle size distribution of the finished cement product should meet the principle of tightest packing for a better performance of the cementing strength of cement.
[0004] Therefore, adjusting the distribution of different mineral compositions in different particle size sections of cement is an extremely important research theme. Some studies have been carried out internationally, but mostly still in the laboratory research stage. Few industrial trial cases were performed, such as the separate grinding technical solution, wherein different materials are separately ground to the desired particle size section, and then mixed uniformly through the proportioning to achieve the purpose of distributing specific mineral components into the specified particle size interval of the finished product. This scheme system is rather complicated and the investment is relatively large. Some analyses indicate that it involves no economic benefits when there are fewer varieties of production.
[0005] The cement production process system in the prior art basically does not involve the o control of particle size distribution, and the details are as follows:
[0006] 1: The combined grinding system is composed of roller press, V-type powder concentrator, three-classification powder concentrator, cyclone separator and ball mill and so on, which features on that a three-way valve is set up so that the system can be switched between following three processes: combined grinding, semi-final grinding and final grinding.
[0007] 2: The combined grinding system composed of vertical mill, V-type static powder concentrator, dynamic static three-classification powder concentrator, ball mill and auxiliary equipment is used, it features on the materials that are pressed and pulverized to powders by vertical mill, and are classified to fine powder, medium coarse powder and coarse powder through the V-type powder concentrator plus three- classification powder concentrator, wherein the fine O powder is collected as the finished product, the medium coarse powder is pulverized by the ball mill then used as the finished product., and the coarse powder is returned to the vertical mill for repeated pulverization. The process system is flexible to adjust.
[0008] 3: At the end of the production process, the obtained cement powder will be stored in three finished product warehouses according to the particle size, which realizes the classification of the finished product particle size and the storage in separate warehouses.
[0009] The above three schemes are relatively flexible grinding schemes, especially the third one realizes the classification and storage offinished products according to particle size. However, the above-mentioned solutions are all traditional technical methods taking the particle size of the material as core, without considering the distribution requirements of the components in the o different particle size interval of the finished cement product.
[0010] The object of the present disclosure is to provide a system for controlling powder particle component and particle size and a control method of the system to solve the problems occurred in the prior art.
[0011] In order to achieve the above objectives, the present disclosure provides the following technical solutions: a system for controlling powder particle component and particle size, wherein the system for controlling includes a material bed pulverizing unit, a classification unit, afine grinding unit, and a mixing unit that are sequentially connected;
[0012] The material bed pulverizing unit is provided for pulverizing the initial raw materials into material particles and then deliver them to the classification unit;
[0013] The classification unit is provided for classifying the material particles into particle groups with different particle size interval distributions. After the classification, the particle groups with different particle size distributions involve particles in fine-grain-size interval, particles in medium-grain-size interval, and particles in coarse-grain-size interval. The particles in medium-grain-size interval are ground through the fine grinding unit to obtain particles in micro-grain-size interval with an average particle size smaller than that of the particles in fine grain-size interval;
[0014] The mixing unit is provided for mixing the particles in the micro-grain-size interval and the particles in the fine-grain-size interval.
[0015] The average particle grain-size of the particles in the micro-grain-size interval is smaller than the average particle grain-size of the particles in thefine-grain-size interval.
[0016] The material bed pulverizing unit is bi-directionally connected with the classification unit, and the classification unit is used to concentrate the particles in coarse-grain-size interval to the material bed pulverizing unit.
[0017] The material bed pulverizing unit includes a roller press, a vertical mill, a beta mill, or a drum mill.
[0018] The classification unit is configured as a multi-classification device, and the multi classification device is used to realize classification processing of at least three particle size intervals.
[0019] The classification unit includes one or a combination of three-classification powder concentrator, V-type concentrator and two-classification powder concentrators with bottom air inlet.
[0020] A control method for the system for controlling powder particle component and particle size, including the following steps:
[0021] Step 1: The initial raw materials are pulverized and processed to material particles with different particle size distributions by the material bed pulverizing unit according to the difference in the grindability of the raw materials;
[0022] Step 2: The classification unit classifies the material particles pulverized by the material bed pulverizing unit into particle groups with different particle size interval distributions, and different particle groups are respectively delivered to different preset processing units according to differences regarding their particle size interval. The preset processing unit includes a material bed pulverizing unit, a fine grinding unit and a mixing unit;
[0023] Step 3: Thefine grinding unit processes the loaded particles into particles in micro grain-size interval with a predetermined interval particle size distribution;
[0024] Step 4: The material particles delivered from the classification unit to the mixing unit are mixed with the particles in the micro-grain-size interval, and thefinished product is obtained.
[0025] In step 2 to step 4, the classification unit classifies the material particles into particle groups with different particle size interval distributions. The particle groups include particles in fine-grain-size interval, particles in medium-grain-size interval, and particles in coarse-grain-size interval. The average particle size of the particles in thefine-grain-size interval is smaller than the average particle size of the particles in the medium-grain-size interval, and the average particle size of the particles in the medium-grain-size interval is smaller than the average particle size of the particles in the coarse-grain-size interval; wherein the particles in thefine-grain-size interval are delivered to the mixing unit, the particles in medium-grain-size interval are delivered to the fine grinding unit and processed into particles in micro-grain-size interval, the average particle O size of particles in micro-grain-size interval is smaller than the average particle size of the particles in fine-grain-size interval, and the particles in fine-grain-size interval are mixed with particles in micro-grain-size interval through the mixing unit to obtain a finished product, and the particles in coarse-grain-size interval are delivered to the material bed pulverizing unit to be reprocessed.
[0026] In step 1, the initial raw materials include newly added raw materials and particles in coarse-grain-size interval delivered from the classification unit, and the initial raw material includes at least two raw material components.
[0027] After the material particles are classified by the classification unit, each particle group with a respective different particle size interval distribution represents a differentiated proportion of particles of different components caused by the difference in grindability.
[0028] In step 3, the particles in the micro-grain-size interval that are pulverized and processed by the fine grinding unit have the differentiated proportions of particles of different components caused by the difference in grindability.
[0029] It can be seen from the above technical solutions that the present disclosure adopts a mixed grinding technology based on material bed pulverizing, it uses the difference in grindability of different materials, and the powder component and particle size in different particle size intervals can all be manual controlled through the grinding and mixing of the system unit, so as to achieve the best application effect of the powder particle, effectively improve the overall performance of the finished product, and at the same time higher efficiency can be realized; attributed to the difference in the grindability of different kinds of particles in the raw materials, different particles are concentrated and distributed in the range of different particle size intervals, and in combination with the processing of the fine grinding unit, a multi-level grinding effects is realized, not only an effective finishing of the particles is executed, but also a particles' distribution change of end value is presented after processing, that is, the particles infine-grain size interval after classification and the particles in micro-grain-size interval are mixed to form particles with better grindability, which are distributed at both ends of the interval, while particles with poor grindability are distributed in the middle of the interval. This kind of control technique realizes the effective control of the powder component and particle size, which gives full play to the performance of particle mixing.
[0030] Figure1 is a flow chart of the system according to the present disclosure.
[0031] The present disclosure will be further elaborated below in conjunction with the attached drawings:
[0032] As shown in Figure 1, this system for controlling powder particle component and particle size is used to realize the interval controlling of each component of raw material and the corresponding controlling of particle size in the powder processing duration, further, a control method for the system for controlling powder particle component and particle size is through the said system provided, in aid of the difference in grindability of different raw materials, the distribution of components in different particle size intervals are adjusted, so as to realize the goal of giving full play to the filling and mixing of different components of raw materials with each other, as it shows specific applications as following;
[0033] This example adopts the mixing and grinding technology based on material bed pulverizing, the mixing of cement raw materials in practical applications is taken as an example. Cement is of hydrated cementing materials. Its raw materials are cement clinker and various low value auxiliary admixtures, and limestone is the most common admixture with cheap price and easy access. The finished cement is composed of micron-level powdery particles, the strength of the finished cement product mainly comes from clinker particles with a particle size of 3-32m, and further research has pointed out that the most fundamental strength comes from clinker particles with a particle size of 8-24m, though auxiliary admixtures partially have certain activity, its main functions is still to act as the mixture between clinker particles. Therefore, if the clinker is ground too coarsely or too finely, it will be wasted due to the inability to exert the cementing strength, and the exceeded proportion of the admixture in the interval of 3-32um will also cause the degradation of cement performance. Therefore, the optimal mixing interval distribution will be: clinker particles are mainly distributed in the interval of 3-32m, and inactive low-value admixtures are used for filling the interval below 3um and above 32m. Combined with the system for controlling according to the present disclosure and the control method for said system, the following specific descriptions are made:
[0034] This system for controlling includes a material bed pulverizing unit, a classification unit, a fine grinding unit, and a mixing unit that are connected in sequence, and the above-mentioned units are used to achieve the following specific functions:
[0035] Firstly, the bed pulverizing unit pulverizes the initial raw materials and delivers them to the classification unit. Considering the preparation of cement, the initial raw materials mainly include two types, namely clinker and limestone. The bed pulverizing unit carries out pulverizing and processing of clinker and limestone. A preliminary interval distribution is realized in aid of difference in the grindability of clinker and limestone, that is, the easy-to-grind limestone particles are finer, and the hard-to-grind clinker particles are coarser;
[0036] It should be noted that the material bed pulverizing unit preferably used in this example includes a roller press or a vertical mill or a beta mill or a roller mill. In the specific implementation process, the working pressure of the roller press can be adjusted, or the cutting particle size in the classification unit can be altered so as to adjust the distribution of components of the final product in each particle size interval.
[0037] Secondly, the classification unit is provided for classifying the pulverized material particles into particle groups with different particle size interval distributions. The particle group contains a variety of interval distributions, including particles infine-grain-size interval, particles in medium-grain-size interval, and particles in coarse-grain-size particles. It is important to note that after classification by the classification unit, the particle groups with three interval particle distributions are formed. The particle group in each interval contains limestone and clinker particles, but due to the difference in grindability of limestone and clinker, their proportions in each interval are different. The interval distribution of the three interval particles includes the following:
[0038] (1) Particles in fine-grain-size interval: due to the difference in grindability between clinker and limestone, and the easy-to-grind particles are finer and the hard-to-grind particles are coarser, the main particle size of the particles in this interval is less than 45tm, and the main particles in this interval particles are of limestone, wherein a small amount of particles are clinker;
[0039] (2) Particles in medium-grain-size interval: due to the difference in grindability between clinker and limestone, and the easy-to-grind particles are finer and the hard-to-grind particles are coarser, the main particle size of this interval particles is 45-80tm and the main particles in this interval particles are of clinker, wherein a small amount of particles are limestone;
[0040] (3) Particles in the coarse-grain-size interval: the particles distributed in this interval are mainly due to insufficient pulverization of the initial raw materials, and their main particle size is greater than 80[m;
[0041] Due to the large difference in grindability between clinker and limestone, the easy-to grind particles are firstly crushed during the high-pressure pulverizing through the material bed. Therefore, the limestone is more likely to be distributed in the finer particle size interval after pulverizing. Therefore, the proportion of limestone content in the particles infine-grain-size interval is higher than the limestone content in the particles in the medium-grain-size interval. Similarly, the proportion of clinker content in the particles in the medium-grain-size interval is higher than the clinker content in the particles in the fine-grain-size interval. It is worth noting that the initial raw materials in this system for controlling powder particle and particle size are pulverized by the material bed, then the particles are classified according to the difference in grindability, so that most of the limestone with good grindability is distributed in thefine-grain size interval particles after pulverization through material bed and classification, that is, the particles with good grindability are classified by the classification unit, and then its proportion in particles in fine-grain-size interval is greater than its the proportion in particles in other intervals.
[0042] At the same time, it should also be noted that the classification unit described in the example preferably uses a multi-classification device, which is used to realize classification processing of at least three particle size intervals. The classification device used in the specific implementation process includes one or a combination of three-classification powder concentrator, V-type classifier and two-classification powder concentrators with bottom air inlet. This example does not limit the specific device model or the use of any combination thereof, and does not limit others available equipment that are not listed, devices can be selected according to actual conditions in actual production and application.
[0043] Thirdly, the particles in medium-grain-size interval are ground through thefine grinding unit to produce particles in micro-grain-size interval with a particle size smaller than the particles in fine-grain-size interval. It should be highlighted that after being ground by the fine grinding unit, the formed particles in micro-grain-size interval mainly include following distribution;
[0044] (1) Clinker distribution: after grinding by the fine grinding unit, the clinker is mainly distributed in the particle size interval of 3-32um, since the main particle size of the particles in the medium interval is 45-80um, the grindability of clinker and limestone is different, and the easy-to-grind particles are relatively fine and the hard-to-grind particles are relatively coarse;
[0045] (2) Limestone distribution: after grinding by the fine grinding unit, the limestone is mainly distributed in the particle size interval less than 3um, since the main particle size of the particles in the medium interval is 45-80um, the grindability of clinker and limestone is different, and the easy-to-grind particles are relatively fine and the hard-to-grind particles are relatively coarse;
[0046] It should be pointed out that this example does not limit the specific equipment model used by the fine grinding unit, and generally a ball mill can be used for grinding in practical applications.
[0047] Fourthly, the mixing unit mixes the particles in the micro-grain-size interval and the particles in the fine-grain-size interval. It is important to note that, it can be seen from the above that after the particles in micro-grain-size interval and the particles in fine-grain-size interval are mixed, and then the clinker mainly filled 3-32um interval particles, while limestone mainly filled 32-45m and less than 3um interval particles, so as to give full play to the clinker strength. Moreover, the particles in each interval in present disclosure involve the average particle size, the particles are distributed in the respective interval, and the intervals may overlap.
[0048] This system for controlling powder particle component and particle size can not only mix cement raw materials, but also mix other similar raw materials through the difference in grindability in practical applications, so as to achieve the effect of controlling powder particle component and particle size, the above-mentioned component and particle size can be controlled by this system; at the same time, this system includes a control method for the system for controlling powder particle component and particle size, which includes the following steps:
[0049] Step 1: The initial raw materials are pulverized and processed to material particles with different particle size distributions by the material bed pulverizing unit according to the difference in the grindability of the raw materials;
[0050] Step 2: The classification unit classifies the material particles pulverized by the material bed pulverizing unit into particle groups with different particle size interval distributions, and different particle groups are respectively delivered to different preset processing units according to differences regarding their particle size interval. The preset processing unit includes the material bed pulverizing unit, the fine grinding unit and the mixing unit;
[0051] Step 3: Thefine grinding unit processes the particles loaded therein into particles in micro-grain-size interval with a predetermined interval particle size distribution;
[0052] Step 4: The material particles delivered from the classification unit to the mixing unit are mixed with the particles in the micro-grain-size interval, and thereby a finished product is obtained.
[0053] Preferably, the classification unit classifies the material particles into particle groups with different particle size interval distributions. The particle groups include particles in fine grain-size interval, particles in medium-grain-size interval, and particles in coarse-grain-size interval. The average particle size of the particles in thefine-grain-size interval is smaller than the average particle size of the particles in the medium-grain-size interval, and the average particle size of the particles in the medium-grain-size interval is smaller than the average particle size of the particles in the coarse-grain-size interval. It is noted that although the classification unit is used in this example to implement classification process, the number of classes for particle groups are not specifically limited, e. g. there are three classes in this example, namely particles in fine grain-size interval, particles in medium-grain-size interval and particles in coarse-grain-size interval, however particle groups with more classes upon classifying can be provided in praxis according to the actual production demands and the devices. In the preferred embodiment the particles in the fine-grain-size interval are delivered to the mixing unit, the particles in medium grain-size interval are delivered to the fine grinding unit and processed into particles in micro grain-size interval, the average particle size of particles in micro-grain-size interval is smaller than the average particle size of the particles in fine-grain-size interval, and the particles in fine grain-size interval are mixed with particles in micro-grain-size interval through the mixing unit so as to obtain afinished product, and the particles in coarse-grain-size interval are delivered to the material bed pulverizing unit to be reprocessed.
[0054] Preferably, in step 1, the initial raw materials include newly added raw materials and particles in coarse-grain-size interval delivered from the classification unit, and the initial raw material includes at least two raw material components. Since the particles distributed in the particles in coarse-grain-size interval are mainly the initial raw materials that have not been fully pulverized, and the particle size thereof is too large to further accomplish the mixing or fine grinding work. The further pulverization and process can be executed by reclassifying it from the classification unit to the material bed pulverization unit. At the same time, it should be pointed out that the powder component and particle size control used in this example aims on different raw material components, that is, it only worth to be implemented when the initial material contains two or more raw material components.
[0055] After the material particles are classified by the classification unit, the particle groups located in different particle size interval distributions all have differentiated proportions of different particles due to the difference in grindability. It can be understood that, after classification by the classification unit, the particles in the fine-grain-size interval, the particles in the medium-grain-size interval and the particles in the coarse-grain-size interval all have o proportions of different particle content, and the proportions of content depend on the difference in grindability.
[0056] Preferably, instep 3, the particles in the micro-grain-size interval that are pulverized and processed by the fine grinding unit have the differentiated proportions of particles of different components caused by the difference in grindability, and the proportions depend on the grindability of the respective particles in the interval. For example, particles in the medium-grain size interval include particle I and particle II, and the grindability of particle I is better than that ofparticle II. After being processed by the fine grinding unit, the content interval of the processed particles I within the micro-grain-size interval tends to the range interval for the finer due to the difference in grindability, while the content interval of the particles II tends to the range interval for the coarser due to the difference in grindability.
[0057] In summary, the control method for the system for controlling powder particle component and particle size can effectively implement interval distribution control and particle size control. Taking limestone and clinker in the components of cement into consideration, it can be seen that through using this control method the limestone with good grindability and fragility can be effectively distributed at both ends of the interval in the cement mixture, and clinker with poor grindability and fragility can be distributed in the middle interval of the cement mixture, that is, the limestone effectively filled the particle size interval of less than 3[m and 32-45[tm, and a small amount of clinker is also mixed in this interval, and the clinker effectively filled the particle size interval of 3-32[tm, and a small amount of limestone is also mixed in this interval. The control method can increase the proportion of the main particles in each interval, thereby realizing the adjustment of cement quality and better applying the effect of cement cementing strength.
[0058] The above-mentioned examples only describe the preferred examples of the present disclosure, and do not limit the scope of the present disclosure. Without departing from the design spirit of the present disclosure, various modifications and improvements to the technical solutions of the present disclosure made by a person skilled in the art should all fall within the protection scope determined by the claims of the present disclosure.
Claims (10)
1. A system for controlling powder particle component and particle size, including a material bed pulverizing unit, a classification unit, a fine grinding unit, and a mixing unit that are sequentially connected,
wherein the material bed pulverizing unit is provided for pulverizing initial raw materials into material particles and then deliver them to the classification unit,
wherein the classification unit is provided for classifying the material particles into particle groups with different particle size interval distributions, and after the classification, the particle 9 groups with different particle size distributions involve particles in a fine-grain-size interval, particles in a medium-grain-size interval, and particles in a coarse-grain-size interval,
wherein the particles in the medium-grain-size interval are ground through the fine grinding unit to obtain particles in a micro-grain-size interval with an average particle size smaller than that of the particles in the fine-grain-size interval, and
wherein the mixing unit is provided for mixing the particles in the micro-grain-size interval and the particles in the fine-grain-size interval.
2. The system for controlling powder particle component and particle size according to claim 1, wherein the material bed pulverizing unit is bidirectionally connected with the classification unit, and the classification unit is used to concentrate the particles in the coarse-grain-size 9 interval to the material bed pulverizing unit.
3. The system for controlling powder particle component and particle size according to claim 1 or 2, wherein the material bed pulverizing unit includes a roller press, a vertical mill, a beta mill or a drum mill.
4. The system for controlling powder particle component and particle size according to any one of the preceding claims, wherein the classification unit is configured as a multi-classification device, and the multi-classification device is used to realize classification processing of at least three particle size intervals.
5. The system for controlling powder particle component and particle size according to any one of the preceding claims, wherein the classification unit includes one or a combination of a o three-classification powder concentrator, a V-type classifier and two-classification powder concentrators with a bottom air inlet.
6. A control method for the system for controlling powder particle component and particle size according to any one of claims 1-5, comprising the following steps: step 1: the initial raw materials are pulverized and processed to material particles with different particle size distributions by the material bed pulverizing unit according to the difference in the grindability of the raw materials; step 2: the classification unit classifies the material particles pulverized by the material bed pulverizing unit into particle groups with different particle size interval distributions, and the different particle groups are respectively delivered to different preset processing units according to differences regarding their particle size interval, wherein the preset processing unit includes the material bed pulverizing unit, the fine grinding unit and the mixing unit; 9 step 3: the fine grinding unit processes the particles loaded therein into particles in the micro grain-size interval with a predetermined interval particle size distribution; and step 4: the material particles delivered from the classification unit to the mixing unit are mixed with the particles in the micro-grain-size interval, and a finished product is obtained.
7. The control method for the system for controlling powder particle component and particle size according to claim 6, wherein, in step 2 to step 4, the classification unit classifies the material particles into particle groups with different particle size interval distributions, wherein the particle groups include particles in the fine-grain-size interval, particles in the medium-grain size interval, and particles in the coarse-grain-size interval, wherein the average particle size of the particles in the fine-grain-size interval is smaller than the average particle size of the 9 particles in the medium-grain-size interval, and the average particle size of the particles in the medium-grain-size interval is smaller than the average particle size of the particles in the coarse-grain-size interval; wherein the particles in the fine-grain-size interval are delivered to the mixing unit, the particles in the medium-grain-size interval are delivered to the fine grinding unit and processed into particles in the micro-grain-size interval, wherein the average particle size of the particles in the micro-grain-size interval is smaller than the average particle size of the particles in thefine-grain-size interval, and the particles in the fine-grain-size interval are mixed with the particles in the micro-grain-size interval through the mixing unit so as to obtain the finished product, and the particles in the coarse-grain-size interval are delivered to the material bed pulverizing unit to be reprocessed.
o 8. The control method for the system for controlling powder particle component and particle size according to claim 7, wherein, in step 1, the initial raw materials include newly added raw materials and the particles in coarse-grain-size interval delivered from the classification unit, and the initial raw materials include at least two raw material components.
9. The control method for the system for controlling powder particle component and particle size according to claim 8, wherein after the material particles are classified by the classification unit, each particle group with a respective different particle size interval distribution represents a differentiated proportion of particles of different components caused by the difference in grindability.
10. The control method for the system for controlling powder particle component and particle size according to claim 6, wherein in step 3, the particles in the micro-grain-size interval that are pulverized and processed by the fine grinding unit have the differentiated proportions of particles of different components caused by the difference in grindability.
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| CN202010413502.2A CN111589561A (en) | 2020-05-15 | 2020-05-15 | Powder component and particle size control system and control method thereof |
| CN202010413502.2 | 2020-05-15 | ||
| PCT/CN2020/102187 WO2021227244A1 (en) | 2020-05-15 | 2020-07-15 | Powder composition and particle size control system, and control method for same |
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| AU2020444462A1 AU2020444462A1 (en) | 2021-12-02 |
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| CN102947244A (en) * | 2010-04-15 | 2013-02-27 | 罗马水泥有限责任公司 | Narrow psd hydraulic cement-scm blends, and methods for making same |
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| DE19514971A1 (en) * | 1994-04-27 | 1995-11-02 | Heinz Jaeger | Energy efficient grinding, esp. of cement clinker |
| CN1410379A (en) * | 2002-05-01 | 2003-04-16 | 内蒙古蒙西高新技术集团有限公司 | Method of producing high performance cement using cascade grinder |
| JP2004188368A (en) * | 2002-12-13 | 2004-07-08 | Ube Machinery Corporation Ltd | Grinding method |
| ES2673151T3 (en) * | 2014-07-28 | 2018-06-20 | Heidelbergcement Ag | Procedure for crushing cement clinker |
| CN106348629B (en) * | 2016-08-25 | 2018-02-23 | 嘉华特种水泥股份有限公司 | A kind of cement grinding preparation technology |
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| CN111589561A (en) | 2020-08-28 |
| DE112020001184T5 (en) | 2022-03-17 |
| AU2020444462A1 (en) | 2021-12-02 |
| WO2021227244A1 (en) | 2021-11-18 |
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