WO2021227244A1 - 一种粉粒组分和粒径控制***及该***的控制方法 - Google Patents

一种粉粒组分和粒径控制***及该***的控制方法 Download PDF

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Publication number
WO2021227244A1
WO2021227244A1 PCT/CN2020/102187 CN2020102187W WO2021227244A1 WO 2021227244 A1 WO2021227244 A1 WO 2021227244A1 CN 2020102187 W CN2020102187 W CN 2020102187W WO 2021227244 A1 WO2021227244 A1 WO 2021227244A1
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Prior art keywords
particles
particle size
unit
diameter
interval
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PCT/CN2020/102187
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English (en)
French (fr)
Inventor
包玮
王虔虔
高霖
丁浩
包琦
郑智如
徐珺
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中建材(合肥)粉体科技装备有限公司
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Priority to DE112020001184.4T priority Critical patent/DE112020001184T5/de
Priority to AU2020444462A priority patent/AU2020444462B2/en
Publication of WO2021227244A1 publication Critical patent/WO2021227244A1/zh

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/36Manufacture of hydraulic cements in general
    • C04B7/48Clinker treatment
    • C04B7/52Grinding ; After-treatment of ground cement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary 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
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12Separating 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00Control arrangements specially adapted for crushing or disintegrating
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/36Manufacture of hydraulic cements in general
    • C04B7/48Clinker treatment
    • C04B7/52Grinding ; After-treatment of ground cement
    • C04B7/522After-treatment of ground cement
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/36Manufacture of hydraulic cements in general
    • C04B7/48Clinker treatment
    • C04B7/52Grinding ; After-treatment of ground cement
    • C04B7/527Grinding ; After-treatment of ground cement obtaining cements characterised by fineness, e.g. by multi-modal particle size distribution
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material

Definitions

  • the invention relates to the technical field of powder particle component and particle size control, in particular to a powder particle component and particle size control system and a control method of the system.
  • Cement is a commonly used building material.
  • China is the world's largest cement producer. In 2018, it produced approximately 2.2 billion tons of cement, accounting for 56% of the world's output.
  • China's cement development has promoted the construction and development of infrastructure, real estate, industry and other fields, while also consuming a lot of energy and resources. Therefore, in recent years, a large number of researches have been carried out on high-efficiency, low-energy consumption, and resource-less cement production technologies, and a large amount of technological progress has been made. A large number of cement production technologies with international leading level.
  • Cement is a hydrating and cementing material, and its raw materials are cement clinker (or clinker for short) and various low-value auxiliary admixtures. Among them, limestone is the most common admixture, and the price is cheap.
  • the finished cement is micron-level powdery particles. According to research, the strength of the finished cement product mainly comes from clinker particles with a particle size of 3-32um, and further studies have pointed out that the most important strength comes from clinker particles with a particle size of 8-24um. It is active, but the main function is still as a mixture of clinker particles.
  • cement clinker is mainly distributed in the range of 3-32um, and inactive low-value mixed materials are used for filling below 3um and above 32um.
  • the overall particle size distribution of the finished cement product should meet the principle of tightest packing. In order to better exert the cement gel strength.
  • the cement production process system in the prior art basically does not involve the control of particle size distribution, and the details are as follows:
  • the combined grinding system is composed of roller press, V-type powder separator, three-separation powder separator, cyclone separator, ball mill and other equipment. , Switch between the three processes of semi-final grinding and final grinding.
  • the combined grinding system is composed of vertical mill, V-selection static powder concentrator, dynamic and static three-separation powder concentrator, ball mill, and auxiliary equipment.
  • the crushed materials are divided into fine powder, medium coarse powder and coarse powder.
  • the fine powder is collected as a finished product, and the medium and coarse powder is pulverized by a ball mill as the finished product.
  • the coarse powder is returned to the vertical mill for repeated pulverization, and the process system is flexible to adjust.
  • the prepared 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 of separate warehouses.
  • the above three schemes are relatively flexible grinding schemes, especially the third one realizes the classification and storage of finished products according to particle size.
  • the above-mentioned solutions are all traditional technical methods with the particle size of the material as the core, without considering the distribution requirements of the finished cement products for the components in different particle size ranges.
  • the purpose of the present invention is to provide a powder particle composition and particle size control system and a control method of the system to solve the problems raised in the background art.
  • a powder particle composition and particle size control system the control system includes a bed crushing unit, a classification unit, a fine grinding unit, and a mixing unit that are sequentially connected;
  • the material bed crushing unit is used to crush the initial raw materials into material particles and then transport them to the classification unit;
  • the classification unit is used to classify the material particles into particle groups with different particle size distributions.
  • the particle groups with different particle size distributions include fine-diameter particles, medium-diameter particles, and coarse-diameter particles.
  • the medium-diameter interval particles are ground through the fine grinding unit to obtain micro-diameter interval particles with an average particle size smaller than the fine-diameter interval particles;
  • the mixing unit is used for mixing the particles in the micro-diameter interval and the particles in the small-diameter interval.
  • the average particle diameter of the particles in the micro-diameter range is smaller than the average particle diameter of the particles in the small-diameter range.
  • the material bed crushing unit is bidirectionally connected with the grading unit, and the grading unit is used to sort the coarse-diameter interval particles to the material bed crushing unit.
  • the material bed crushing unit includes a roller press, a vertical mill, a beta mill, or a drum mill.
  • 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 ranges.
  • the classification unit includes one or a combination of three separation powder classifiers, V-type classifiers, and bottom air inlet two separation powder classifiers.
  • a control method of powder particle composition and particle size control system including the following steps;
  • Step 1 The material bed crushing unit crushes and processes the initial raw materials into material particles with different particle size distributions through the difference in the grindability of the raw materials;
  • Step 2 The classification unit classifies the material particles pulverized by the material bed crushing unit into particle groups with different particle size interval distributions, and different particle groups are respectively transported to different preset processing units according to the difference in the particle size interval.
  • the preset processing unit includes a material bed crushing unit, a fine grinding unit and a mixing unit;
  • Step 3 The fine grinding unit processes the particles entering the unit into micro-diameter interval particles with a predetermined interval particle size distribution
  • Step 4 The material particles conveyed from the classification unit to the mixing unit are mixed with the micro-diameter particles, and the finished product is obtained.
  • the classification unit classifies the material particles into particle groups with different particle size interval distributions.
  • the particle group includes fine-diameter interval particles, medium-diameter interval particles, and coarse-diameter interval particles.
  • the average particle size of the particles in the diameter interval is smaller than the average particle size of the particles in the medium diameter interval, and the average particle size of the particles in the middle diameter interval is smaller than the average particle size of the particles in the coarse diameter interval; wherein the particles in the fine diameter interval are transported to the mixing unit ,
  • the medium-diameter interval particles are transported to the fine grinding unit and processed into micro-diameter interval particles, the average particle size of the micro-diameter interval particles is smaller than the average particle size of the fine-diameter interval particles, and the fine-diameter interval particles are passed through the mixing unit
  • the particles are mixed with the micro-diameter interval particles to obtain a finished product, and the coarse-diameter interval particles are transported to the material bed crushing unit and reprocessed.
  • the initial raw material includes newly added raw materials and coarse-diameter particles delivered by the classification unit, and the initial raw material includes at least two raw material components.
  • the particle groups located in the different particle size interval distributions all have the differentiated proportions of the different component particles due to the difference in grindability.
  • the particles in the micro-diameter range pulverized and processed by the fine grinding unit include the differentiated proportions of particles of different components caused by the difference in grindability.
  • the present invention adopts a mixed grinding technology based on bed pulverization, uses the difference in grindability of different materials, and through the grinding and mixing of the system unit, the powder composition and particle size are in different particle size ranges.
  • the inner parts are all artificially controllable, so as to realize the best use effect of powder particles, effectively improve the overall performance of the finished product, and at the same time be more efficient; through the difference in the grindability of different kinds of particles in the raw materials, different particles Concentrated distribution in the range of different particle sizes, and combined with the processing of the fine grinding unit to achieve multi-level grinding effects, not only effective finishing of the particles, but also after processing, the particles show end value distribution changes, that is, after classification
  • the fine-diameter interval particles and the micro-diameter interval particles are mixed to form particles with better grindability and distributed at both ends of the interval, while particles with poor grindability are distributed in the middle of the interval. This kind of control realizes the control of the powder composition and Efficient control of particle size gives full play to the performance of particle mixing.
  • Figure 1 is a flow chart of the system of the present invention.
  • this kind of powder composition and particle size control system is used to realize the interval control of each component raw material in the powder processing process and the corresponding particle size control, and provides a powder through this system.
  • the control method of particle composition and particle size control system uses the difference in grindability of different raw materials to adjust the distribution of components in different particle size ranges, so as to realize the role of filling and mixing of different components of raw materials.
  • This embodiment adopts the mixing and grinding technology based on material bed pulverization.
  • the mixing of cement raw materials is taken as an example.
  • Cement is a hydration cementing material, and its raw materials are cement clinker and various low-value auxiliary mixed materials.
  • Limestone is the most common mixed material. This material is cheap and relatively easy to obtain.
  • the finished cement is micron-sized powder particles.
  • the strength of the finished cement mainly comes from clinker particles with a particle size of 3-32um.
  • interval distribution of clinker particles The interval distributions mainly at 3-32um, below 3um and above 32um are mainly filled with inactive low-priced mixed materials.
  • This kind of control system includes a material bed crushing unit, a grading unit, a fine grinding unit, and a mixing unit connected in sequence, and the above-mentioned units are used to achieve the following specific functions:
  • the material bed crushing unit crushes the initial raw materials and transports them to the classification unit.
  • the initial raw materials mainly include two types, namely clinker and limestone.
  • the bed crushing unit implements the treatment of clinker and limestone In the grinding process, the difference in grindability between clinker and limestone is used to realize the initial interval distribution, that is, the easy-to-grind limestone particles are finer, and the hard-to-grind clinker particles are coarser;
  • the material bed crushing unit preferably used in this embodiment includes a roller press or a vertical mill or a beta mill or a roller mill.
  • the working pressure of the roller press can be adjusted, or Change the cut particle size of the classification unit to adjust the distribution of the final product components in each particle size interval.
  • the classification unit is used to classify the pulverized material particles into a particle group with different particle size interval distributions.
  • the particle group contains a variety of interval distributions, including fine-diameter interval particles, medium-diameter interval particles, and coarse-diameter particles. Interval particles; it is important to note that after classification by the classification unit, a particle group with three interval particle distributions is formed.
  • the particle group in each interval contains limestone and clinker particles, but due to the difference between limestone and clinker The difference in grindability results in a difference in the proportion of each interval.
  • the interval distribution of the three interval particles includes the following:
  • Fine-diameter particles 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 45um, and the particles are in this interval. Among them, the main particle is limestone, and a small amount of particles are clinker;
  • the grindable particles are crushed first during the high-pressure crushing of the material bed. Therefore, the limestone is more likely to be distributed in the finer particle size range after crushing. Therefore, the proportion of limestone content in the particles in the small diameter interval is higher than the limestone content in the particles in the medium diameter interval. Similarly, the proportion of clinker content in the particles in the medium diameter interval is higher than the clinker content in the particles in the fine diameter interval; It should be noted that the initial raw materials in this kind of powder and particle size control system are pulverized by the material bed, and the grading distribution of the particles is realized through the difference in grindability.
  • the proportion of particles in the fine-diameter range is greater than that of the component particles in other particle sizes. The proportion of particles in the interval.
  • the classification unit described in the embodiment preferably adopts a multi-classification device, which is used to achieve the classification of particles in at least three particle sizes.
  • the classification device used in the specific implementation process includes three separation options.
  • This embodiment does not limit the specific device model or the use of any combination thereof, and does not limit other The equipment that is not listed can be selected according to actual conditions in actual production and application.
  • the medium-diameter interval particles are ground through the fine grinding unit to produce micro-diameter interval particles with a particle size smaller than that of the fine-diameter interval particles. Including the following distribution;
  • this embodiment 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.
  • the mixing unit mixes the particles in the micro-diameter interval and the particles in the small-diameter interval. It is important to note that, from the above, it can be seen that after the mixing of micro-diameter interval particles and fine-diameter interval particles, the clinker is mainly filled with 3-32um interval particles, while limestone is mainly filled with 32-45um and less than 3um interval particles. So as to give full play to the purpose of clinker strength. Moreover, the particles in each interval involved in this case are the average particle size of the particle size, the particles are distributed in the interval, and the interval may overlap.
  • This kind of powder component and particle size control system can not only mix cement raw materials in practical applications, but also mix other similar raw materials through the difference in grindability, so as to achieve the powder component With the function of particle size control, the above-mentioned components and particle size can be controlled by this kind of system; at the same time, this kind of system includes a control method of powder particle composition and particle size control system, including the following steps:
  • Step 1 The material bed crushing unit crushes and processes the initial raw materials into material particles with different particle size distributions through the difference in the grindability of the raw materials;
  • Step 2 The classification unit classifies the material particles pulverized by the material bed crushing unit into particle groups with different particle size interval distributions, and different particle groups are respectively transported to different preset processing units according to the difference in the particle size interval.
  • the preset processing unit includes a material bed crushing unit, a fine grinding unit and a mixing unit;
  • Step 3 The fine grinding unit processes the particles entering the unit into micro-diameter interval particles with a predetermined interval particle size distribution
  • Step 4 The material particles conveyed from the classification unit to the mixing unit are mixed with the micro-diameter particles, and the finished product is obtained.
  • the classification unit classifies the material particles into a particle group with different particle size interval distributions, and the particle group includes fine-diameter interval particles, medium-diameter interval particles, and coarse-diameter interval particles.
  • the average particle size is smaller than the average particle size of the particles in the medium-diameter interval, and the average particle size of the particles in the medium-diameter interval is smaller than the average particle size of the particles in the coarse-diameter interval;
  • the number of classifications of specific particle groups is not limited.
  • this embodiment includes three classifications, namely, small diameter interval particles, medium diameter interval particles, and coarse diameter interval particles. In actual operation, it can be classified according to actual production needs or different equipment.
  • the fine-diameter interval particles are transported to the mixing unit, and the medium-diameter interval particles are transported to the fine grinding unit and processed into fine-diameter interval particles.
  • the average particle size of the particles is smaller than the average particle size of the particles in the small diameter interval, the small diameter interval particles are mixed with the micro diameter interval particles through the mixing unit to obtain a finished product, and the coarse diameter interval particles are transported to the material bed crushing unit And reprocessed.
  • the initial raw material includes newly added raw materials and coarse-diameter particles delivered by the classification unit, and the initial raw material includes at least two raw material components. Since the particles distributed in the coarse-diameter range are mainly the initial raw materials that have not been fully pulverized, the particle size is large, and further mixing or fine grinding operations cannot be achieved.
  • the classification unit can be re-sorted to the material bed pulverization unit for further pulverization. Processing; At the same time, it should be pointed out that the powder composition and particle size control used in this embodiment need to be controlled for different raw material components, that is, the initial material contains two or more raw material components before it can be implemented. significance.
  • the particle groups located in the different particle size interval distributions all have different particle differentiation proportions due to the difference in grindability. It can be understood that after classification by the classification unit, the particles in the fine-diameter interval, the middle-diameter interval and the coarse-diameter interval all contain different particle content proportions, and the proportion of this kind of content depends on the difference in grindability. .
  • the micro-diameter interval particles pulverized and processed by the fine grinding unit include the differentiated proportions of different kinds of particles caused by the difference in grindability, and the proportion depends on each of the particles in the interval.
  • the grindability of different particles depends on the difference.
  • particles in the medium-diameter range include particle one and particle two, and the grindability of particle one is better than that of particle two.
  • the processed particles contained in the micro-diameter range will be affected The difference in grindability results in the content range tending to be within the narrower range, while the difference in grindability of the particles should lead to the content range tending to be within the coarser range.
  • the control method of this kind of powder component and particle size control system can effectively implement interval distribution control and particle size control.
  • the use of this control method can effectively reduce Limestone with good grindability and fragility is distributed at both ends of the interval in the cement mixture, and clinker with poor grindability and fragility is distributed in the middle interval of the cement mixture, that is, the limestone is effectively filled with less than The particle size in the interval of 3um and 32-45um, and a small amount of clinker is also mixed in this interval, and the clinker is effectively filled with the particle size of 3-32um, 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 exerting the role of cement cementing strength.

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Abstract

一种粉粒组分和粒径控制***及该***的控制方法,该控制***包括有依次连接的料床粉碎单元、分级单元、细磨单元以及混合单元;料床粉碎单元用于将初始原料粉碎成物料颗粒后输送至分级单元;分级单元用于将物料颗粒分级成具有不同粒径区间分布的颗粒组,分级后具有不同粒径分布的颗粒组包括有细径区间颗粒、中径区间颗粒和粗径区间颗粒,中径区间颗粒通过细磨单元研磨出具有平均粒径小于细径区间颗粒的微径区间颗粒。采用基于料床粉碎的混合粉磨技术,利用不同物料易磨性的差异,通过***单元的研磨以及混合,使得粉粒组分和粒径在不同的粒径区间内均达到了人为可控,从而实现了充分发挥粉粒的最佳使用效果。

Description

一种粉粒组分和粒径控制***及该***的控制方法 技术领域
本发明涉及粉粒组分和粒径控制技术领域,具体为一种粉粒组分和粒径控制***及该***的控制方法。
背景技术
水泥是一种常用的建筑材料,中国是世界上最大的水泥生产国,2018年生产水泥约22亿吨,占世界产量的56%。中国的水泥发展促进了基建、房地产、工业等领域的建设发展,同时也消耗了大量的能源和资源。因此,近些年,围绕高效率、低能耗、少资源的水泥生产技术开展了大量的研究,取得了大量的技术进步,尤其是“两个二代”水泥关键技术研发攻关中,涌现出一大批具有国际领先水平的水泥生产技术。
水泥属水化胶凝材料,其原料为水泥熟料(或简称熟料)以及各类低价值的辅助混合材,其中,混合材又以石灰石最为常见,价格便宜。水泥成品为微米级别的粉状颗粒。根据研究,水泥成品的强度主要来自于3-32um粒径的熟料颗粒,且更进一步的研究指出,最主要的强度发挥来自于8-24um的熟料颗粒,而辅助混合材虽然部分具有一定的活性,但主要作用还是作为熟料颗粒间的混合物。所以,将熟料粉磨得过粗或过细,都会因无法发挥胶凝强度而造成浪费,混合材在3-32um区间比例过高也会造成水泥性能的下降。因此,最理想的状态是:水泥熟料主要分布在3-32um区间,3um以下和32um以上采用非活性低价值的混合材进行填充,同时水泥成品的总体粒径分布要满足最紧密堆积原则,以更好的发挥水泥胶凝强度。
因此,通过调节不同的矿物组成在水泥不同粒径段的分布是一项及其重要的研究课题,国际上已经开展了一些研究,但基本是处于实验室研究阶段。在工业上有少量的尝试案例,比如分别粉磨技术方案:通过对不同物料分别粉磨至需要的颗粒段,再通过配比混合均匀以实现将特定的矿物组分分布到成品指定的粒径区间的目的。该方案***较复杂,投资较大,有分析表明,在生产品种较少时,不具备经济效益。
现有技术中的水泥生产工艺***基本不涉及对粒径分布控制,具体如下:
1:通过辊压机、V型选粉机、三分离选粉机、旋风分离器和球磨机等设备组成的联合粉磨***,其特点是通过三通阀的设置,使得***可以在联合粉磨、半终粉磨和终粉磨三种工艺之间切换。
2:采用立式磨、V选静态选粉机、动静结合式三分离选粉机、球磨机以及辅机设备组成联合粉磨***,其特点是通过V选+三分离选粉机将立磨挤压粉碎的物料分为细粉、中粗粉以及粗粉,其中细粉收集后作为成品,中粗粉进球磨机粉磨后作为成品,粗粉返回立式磨重复粉碎,工艺***调整灵活。
3:将制得的水泥粉末在生产过程结束时按粒径进入三个成品库进行保存,实现了成品粒度的分级以及分库存放。
以上三种方案都是较为灵活的粉磨方案,尤其是第三种实现了成品按照粒度分级和存放。但这上述方案都是传统的以物料颗粒尺寸为核心的技术手段,未考虑水泥成品对组分在不同粒径区间的分布要求。
发明内容
本发明的目的在于提供一种粉粒组分和粒径控制***及该***的控制方法,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:一种粉粒组分和粒径控制***,该控制***包括有依次连接的料床粉碎单元、分级单元、细磨单元以及混合单元;
所述料床粉碎单元用于将初始原料粉碎成物料颗粒后输送至分级单元;
所述分级单元用于将物料颗粒分级成具有不同粒径区间分布的颗粒组,分级后具有不同粒径分布的颗粒组包括有细径区间颗粒、中径区间颗粒和粗径区间颗粒,所述中径区间颗粒通过细磨单元研磨出具有平均粒径小于细径区间颗粒的微径区间颗粒;
所述混合单元用于混合微径区间颗粒和细径区间颗粒。
所述微径区间颗粒的平均粒径小于细径区间颗粒的平均粒径。
所述料床粉碎单元与分级单元双向连接,该所述分级单元用于将粗径区间颗粒分选至料床粉碎单元。
所述料床粉碎单元包括有辊压机或立式磨或贝塔磨或滚筒磨。
所述分级单元设置为多分级装置,该多分级装置用于实现至少三种粒径区间的分级处理。
所述分级单元包括有三分离选粉机、V型分级机、下进风二分离选粉机中的一种或多种的组合。
一种粉粒组分和粒径控制***的控制方法,包括有以下步骤;
步骤一:所述料床粉碎单元通过原料易磨性差异将初始原料粉碎加工成具有不同粒径分布的物料颗粒;
步骤二:所述分级单元将经料床粉碎单元粉碎后的物料颗粒分级成具有不同粒径区间分布的颗粒组,不同的颗粒组根据其粒径区间差异分别输送至不同的预设处理单元,所述预设处理单元包括有料床粉碎单元、细磨单元和混合单元;
步骤三:所述细磨单元将进入该单元的颗粒加工成具有预设区间粒径分布的微径区间颗粒;
步骤四:将从分级单元输送至混合单元的物料颗粒与微径区间颗粒混合,并制得成品。
步骤二至步骤四中,所述的分级单元将物料颗粒分级成具有不同粒径区间分布的颗粒组,该颗粒组包括有细径区间颗粒、中径区间颗粒以及粗径区间颗粒,所述细径区间颗粒的平均粒径小于中径区间颗粒的平均粒径,所述中径区间颗粒的平均粒径小于粗径区间颗粒的平均粒径;其中,所述的细径区间颗粒输送至混合单元,所述中径区间颗粒输送至细磨单元并加工成微径区间颗粒,该微径区间颗粒的平均粒径小于细径区间颗粒的平均粒径,将所述的细径区间颗粒通过混合单元与微径区间颗粒混合并制得成品,所述的粗径区间颗粒输送至料床粉碎单元并重新加工。
步骤一中,所述的初始原料包括有新添加原料以及分级单元输送的粗径区间颗粒,该初始原料中包括有至少两种原料组分。
所述物料颗粒在经过分级单元分级后,位于各个不同粒径区间分布的颗粒组中均具有因易磨性差异而产生的不同组分颗粒的差异化占比量。
步骤三中,所述细磨单元粉碎加工出的微径区间颗粒中包括有因易磨性差异而产生的不同组分颗粒的差异化占比量。
由上述技术方案可知,本发明采用基于料床粉碎的混合粉磨技术,利用不同物料易磨性的差异,通过***单元的研磨以及混合,使得粉粒组分和粒径在不同的粒径区间内均达到了人为可控,从而实现了充分发挥粉粒的最佳使用效果,有效的提升了成品的整体性能,同时更加高效;通过原料中不同种颗粒的易磨性差异,使得不同的颗粒集中分布在不同粒径区间范围内,同时结合细磨单元的加工处理实现了多层次研磨效果,不但有效的对颗粒实施精加工,同时在经过加工后使得颗粒呈现端值分布变化,即分级后的细径区间颗粒和微径区间颗粒混合形成了易磨性较好的颗粒分布于区间两端,而易磨性较差的颗粒分布于区间中段,该种控制实现了对粉粒组分和粒径的高效控制,充分的发挥了颗粒混合的使用性能。
附图说明
图1为本发明***流程图。
具体实施方式
下面结合附图对本发明做进一步说明:
如图1所示,该种粉粒组分和粒径控制***用于实现对粉料加工过程中各组分原料的区间控制以及相应的粒径控制,并通过该种***提供了一种粉粒组分和粒径控制***的控制方法,利用不同的原料易磨性的差异,调节组分在不同粒径区间内的分布,从而实现发挥不同组分原料相互填充混合的作用,在具体应用中如下;
本实施例采用基于料床粉碎的混合粉磨技术,在实际应用中以水泥原料的混合为例,水泥属于水化胶凝材料,其原料为水泥熟料以及各类低价值的辅助混合材,混合材又以石灰石最为常见,该种材料价格便宜,且相对易于获得,水泥的成品为微米级别的粉状颗粒,其水泥成品的强度主要来自于3-32um粒径的熟料颗粒,更进一步的研究指出,其最主要的强度发挥来自于8-24um的熟料颗粒,而辅助混合材虽然部分具有一定的活性,但其主要的作用是作为熟料颗粒间的混合物,将熟料研磨的过粗或过细,都会因无法发挥胶凝强度而造成浪费,混合材在3-32um区间比例过高也会造成水泥性能的下降,因此,最佳的混合区间分布为:熟料颗粒的区间分布主要在3-32um,3um以下和32um上的区间分布主要为非活性低价的混合材填充,结合本案的控制***以及该种***的控制方法做出如下具体说明:
该种控制***包括有依次连接的料床粉碎单元、分级单元、细磨单元和混合单元,上述各个单元用于实现如下具体作用:
一:料床粉碎单元将初始原料粉碎后输送至分级单元,结合水泥的制备,所述的初始原料主要包括有两种,分别为熟料和石灰石,通过料床粉碎单元实施对熟料和石灰石的粉碎加工,利用熟料和石灰石的易磨性差异实现初步的区间分布,即,易磨的石灰石颗粒较细,难磨的熟料颗粒较粗;
需要说明的是,本实施例中优选采用的料床粉碎单元包括有辊压机或立式磨或贝塔磨或滚筒磨,在具体实施过程中,可以通过调节辊压机等的工作压力,或者改变分级单元的切割粒径,以实现调整最终成品组分在各个粒径区间的分布。
二:所述分级单元用于将粉碎后的物料颗粒分级成具有不同粒径区间分布的颗粒组,该颗粒组包含有多种区间分布,包括有细径区间颗粒、中径区间颗粒和粗径区间颗粒;需要重点说明的是,在通过分级单元分级后,形成具有三种区间颗粒分布的颗粒组,每个区间的颗粒组内的均含有石灰石和熟料颗粒,但因石灰石和熟料的易磨性差异导致在其各个区间内的占比量均有差异,三种区间颗粒的区间分布包括有如下:
(1)细径区间颗粒:由于熟料和石灰石的易磨性差异,且易磨的颗粒较细、难磨的颗粒较粗,使得该区间颗粒的主要粒径小于45um,同时在该区间颗粒中,其主要颗粒为石灰石,少量颗粒为熟料;
(2)中径区间颗粒:由于熟料和石灰石的易磨性差异,且易磨的颗粒较细、难磨的颗粒较粗,使得该区间颗粒的主要粒径为45-80um,同时在该区间颗粒中,其主要颗粒为熟料,少量颗粒为石灰石;
(3)粗径区间颗粒:该区间内分布的颗粒主要由于初始原料未实现充分粉碎,其主要粒径大于80um;
由于熟料和石灰石的易磨性差异较大,在经过料床的高压粉碎时,易磨的颗粒先破碎,因此,石灰石在挤压粉碎后更倾向于分布在较细的粒径区间内,所以在细径区间颗粒中的石灰石含量比例要高于中径区间颗粒中的石灰石含量,同理,在中径区间颗粒中的熟料含量比例要高于细径区间颗粒中的熟料含量;需要值得注意的在于,该种粉粒和粒径控制***中初始原料在经过料床粉碎后,通过易磨性差异实现颗粒的分级化分布,这就使得在经过料床粉碎并分级后,易磨性较好的石灰石大部分都分布在了细径区间颗粒,即易磨性好的颗粒在经过分级单元分级后,其在细径区间颗粒的占比量大于该组分颗粒在其它粒径区间颗粒中的占比量。
同时,还需要说明的在于,实施例所述的分级单元优选采用的为多分级装置,用于实现至少三种粒径区间颗粒的分级处理,在具体实施过程中采用的分级装置包括有三分离选粉机、V型分级机、下进风二分离选粉机中的一种或多种的组合,本实施例不限定其具体采用的装置型号或其任意的组合形式的使用,同时不限定其它未列举出的可采用设备,在实际生产应用中可根据实际情况选用。
三:所述中径区间颗粒通过细磨单元研磨出具有粒径小于细径区间颗粒的微径区间颗粒,需要重点说明的是,在通过细磨单元研磨后,其形成的微径区间颗粒主要包括如下分布;
(1)熟料分布:经细磨单元研磨后,由于中间区间颗粒中主要粒径为45-80um,熟料和石灰石的易磨性差异,且易磨的颗粒较细、难磨的颗粒较粗,使得熟料主要分布在3-32um的粒径区间内;
(2)石灰石分布:经细磨单元研磨后,由于中间区间颗粒中主要粒径为45-80um,熟料和石灰石的易磨性差异,且易磨的颗粒较细、难磨的颗粒较粗,使得石灰石主要分布在小于3um的粒径区间内;
需要指出的是,本实施例不限定细磨单元采用的具体设备型号,在实际应用中一般可采用球磨机研磨。
四:混合单元混合微径区间颗粒和细径区间颗粒。需要重点说明的在于,由上述可知,微径区间颗粒和细径区间颗粒混合后,熟料主要实现了填充3-32um的区间颗粒,而石灰石主要填充了32-45um以及小于3um的区间颗粒,从而充分发挥了熟料强度的目的。且本案所涉及的各个区间颗粒均为粒径的平均粒径,颗粒分布在区间内,且区间会出现重叠可能性。
该种粉粒组分和粒径控制***在实际应用中既可实施对水泥原料的混合,也可实施对其它与之类似并通过易磨性差异而进行的原料混合,从而达到粉粒组分和粒径控制的作用,通过该种***即可完成对上述组分和粒径的控制;同时,该种***包含有一种粉粒组分和粒径控制***的控制方法,包括有以下步骤:
步骤一:所述料床粉碎单元通过原料易磨性差异将初始原料粉碎加工成具有不同粒径分布的物料颗粒;
步骤二:所述分级单元将经料床粉碎单元粉碎后的物料颗粒分级成具有不同粒径区间分布的颗粒组,不同的颗粒组根据其粒径区间差异分别输送至不同的预设处理单元,所述预设处理单元包括有料床粉碎单元、细磨单元和混合单元;
步骤三:所述细磨单元将进入该单元的颗粒加工成具有预设区间粒径分布的微径区间颗粒;
步骤四:将从分级单元输送至混合单元的物料颗粒与微径区间颗粒混合,并制得成品。
优选的,所述的分级单元将物料颗粒分级成具有不同粒径区间分布的颗粒组,该颗粒组包括有细径区间颗粒、中径区间颗粒以及粗径区间颗粒,所述细径区间颗粒的平均粒径小于中径区间颗粒的平均粒径,所述中径区间颗粒的平均粒径小于粗径区间颗粒的平均粒径;需要说明的是,本实施例采用的分级单元实施分级处理,并不限定其具体颗粒组的分级数量,例如本实施例包含有三种分级,分别为细径区间颗粒、中径区间颗粒以及粗径区间颗粒,在实际操作中可根据实际生产需要或设备的不同分级成具有多种数量分级的颗粒组;在本优选方案中所述的细径区间颗粒输送至混合单元,所述中径区间颗粒输送至细磨单元并加工成微径区间颗粒,该微径区间颗粒的平均粒径小于细径区间颗粒的平均粒径,将所述的细径区间颗粒通过混合单元与微径区间颗粒混合并制得成品,所述的粗径区间颗粒输送至料床粉碎单元并重新加工。
优选的,在步骤一中,所述的初始原料包括有新添加原料以及分级单元输送的粗径区间颗粒,该初始原料中包括有至少两种原料组分。由于粗径区间颗粒内分布的颗粒主要为初始原料未实现充分粉碎,其颗粒粒径较大,无法实现进一步的混合或细磨作业,通过分级单元重新分选至料床粉碎单元可进一步实施粉碎加工;同时需要指出的是,本实施例采用的粉粒组分和粒径控制需要针对具有不同原料组分的控制,即初始物料中包含有两种或两种以上的原料组分才具有实施意义。
所述物料颗粒在经过分级单元分级后,位于各个不同粒径区间分布的颗粒组中均具有因易磨性差异而产生的不同颗粒差异化占比量。即可理解为,通过分级单元分级后,在细径区间颗粒中、中径区间颗粒中和粗径区间颗粒中均含有不同颗粒含量的占比,该种含量占比视易磨性差异而定。
优选的,步骤三中,所述细磨单元粉碎加工出的微径区间颗粒包括有因易磨性差异而产生的不同种颗粒的差异化占比量,该占比量视其区间颗粒中各个不同颗粒的易磨性差异而定。例如,在中径区间颗粒中包含有颗粒一和颗粒二,且颗粒一的易磨性优于颗粒二,在经过细磨单元加工后,微径区间内所含有的加工后的颗粒一会因为易磨性的差异导致其含量区间趋于较细范围区间内,而颗粒二会应为易磨性的差异导致其含量区间趋于较粗范围区间内。
综上,该种粉粒组分和粒径控制***的控制方法可有效的实施区间分布控制以及粒径控制,结合水泥的组分中石灰石和熟料可知,采用该种控制方法可有效的将具有易磨易碎性较好的石灰石分布于水泥混合料中的区间两端,而将易磨易碎性较差的熟料分布于水泥混合料中的中间区间,即石灰石有效的填充了小于3um以及32-45um的区间粒径,且在该区间中也混合有少量熟料,而熟料有效的填充了3-32um的区间粒径,且在该区间中也混合有少量石灰石,该种控制方法能够实现提高各个区间中主要颗粒的占比量,进而实现调节水泥品质,更好的发挥水泥胶凝强度的作用。
以上所述的实施例仅仅是对本发明的优选实施方式进行描述,并非对本发明的范围进行限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案作出的各种变形和改进,均应落入本发明权利要求书确定的保护范围内。

Claims (10)

  1. 一种粉粒组分和粒径控制***,其特征在于:该控制***包括有依次连接的料床粉碎单元、分级单元、细磨单元以及混合单元;
    所述料床粉碎单元用于将初始原料粉碎成物料颗粒后输送至分级单元;
    所述分级单元用于将物料颗粒分级成具有不同粒径区间分布的颗粒组,分级后具有不同粒径分布的颗粒组包括有细径区间颗粒、中径区间颗粒和粗径区间颗粒,所述中径区间颗粒通过细磨单元研磨出具有平均粒径小于细径区间颗粒的微径区间颗粒;
    所述混合单元用于混合微径区间颗粒和细径区间颗粒。
  2. 根据权利要求1所述的一种粉粒组分和粒径控制***,其特征在于:所述料床粉碎单元与分级单元双向连接,该所述分级单元用于将粗径区间颗粒分选至料床粉碎单元。
  3. 根据权利要求1所述的一种粉粒组分和粒径控制***,其特征在于:所述料床粉碎单元包括有辊压机或立式磨或贝塔磨或滚筒磨。
  4. 根据权利要求1所述的一种粉粒组分和粒径控制***,其特征在于:所述分级单元设置为多分级装置,该多分级装置用于实现至少三种粒径区间的分级处理。
  5. 根据权利要求1所述的一种粉粒组分和粒径控制***,其特征在于:所述分级单元包括有三分离选粉机、V型分级机、下进风二分离选粉机中的一种或多种的组合。
  6. 根据权利要求1-5任意一项所述的一种粉粒组分和粒径控制***的控制方法,其特征在于:包括以下步骤;
    步骤一:所述料床粉碎单元通过原料易磨性差异将初始原料粉碎加工成具有不同粒径分布的物料颗粒;
    步骤二:所述分级单元将经料床粉碎单元粉碎后的物料颗粒分级成具有不同粒径区间分布的颗粒组,不同的颗粒组根据其粒径区间差异分别输送至不同的预设处理单元,所述预设处理单元包括有料床粉碎单元、细磨单元和混合单元;
    步骤三:所述细磨单元将进入该单元的颗粒加工成具有预设区间粒径分布的微径区间颗粒;
    步骤四:将从分级单元输送至混合单元的物料颗粒与微径区间颗粒混合,并制得成品。
  7. 根据权利要求6所述的一种粉粒组分和粒径控制***的控制方法,其特征在于:步骤二至步骤四中,所述的分级单元将物料颗粒分级成具有不同粒径区间分布的颗粒组,该颗粒组包括有细径区间颗粒、中径区间颗粒以及粗径区间颗粒,所述细径区间颗粒的平均粒径小于中径区间颗粒的平均粒径,所述中径区间颗粒的平均粒径小于粗径区间颗粒的平均粒径;其中,所述的细径区间颗粒输送至混合单元,所述中径区间颗粒输送至细磨单元并加工成微径区间颗粒,该微径区间颗粒的平均粒径小于细径区间颗粒的平均粒径,将所述的细径区间颗粒通过混合单元与微径区间颗粒混合并制得成品,所述的粗径区间颗粒输送至料床粉碎单元并重新加工。
  8. 根据权利要求7所述的一种粉粒组分和粒径控制***的控制方法,其特征在于:步骤一中,所述的初始原料包括有新添加原料以及分级单元输送的粗径区间颗粒,该初始原料中包括有至少两种原料组分。
  9. 根据权利要求8所述的一种粉粒组分和粒径控制***的控制方法,其特征在于:所述物料颗粒在经过分级单元分级后,位于各个不同粒径区间分布的颗粒组中均具有因易磨性差异而产生的不同组分颗粒的差异化占比量。
  10. 根据权利要求6所述的一种粉粒组分和粒径控制***的控制方法,其特征在于:步骤三中,所述细磨单元粉碎加工出的微径区间颗粒中包括有因易磨性差异而产生的不同组分颗粒的差异化占比量。
PCT/CN2020/102187 2020-05-15 2020-07-15 一种粉粒组分和粒径控制***及该***的控制方法 WO2021227244A1 (zh)

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