WO2023216807A1 - 一种锂云母尾泥全废料制备生态发泡陶瓷的方法 - Google Patents

一种锂云母尾泥全废料制备生态发泡陶瓷的方法 Download PDF

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WO2023216807A1
WO2023216807A1 PCT/CN2023/088354 CN2023088354W WO2023216807A1 WO 2023216807 A1 WO2023216807 A1 WO 2023216807A1 CN 2023088354 W CN2023088354 W CN 2023088354W WO 2023216807 A1 WO2023216807 A1 WO 2023216807A1
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lepidolite
tail mud
homogenization
ball
ecological
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PCT/CN2023/088354
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English (en)
French (fr)
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潘德安
孔儒豪
张晓光
章启军
谭哲
王维
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北京工业大学
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Priority to US18/500,592 priority Critical patent/US12006268B2/en
Publication of WO2023216807A1 publication Critical patent/WO2023216807A1/zh

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Definitions

  • the present invention relates to the field of preparing ecological materials from solid waste, and in particular to a method of preparing ecological foaming ceramics using all lepidolite tail mud waste. It belongs to the field of environmental protection and resource reuse and is suitable for processing tail mud produced by lepidolite mineral processing.
  • the invention can Ecological foaming ceramics that meet the industrial standards of CJ/T 299-2008 "Artificial Ceramic Filter Materials for Water Treatment" were prepared.
  • lepidolite tailings The process flow of producing lepidolite concentrate through mineral processing can be seen in Figure 1 of the instruction manual.
  • the yield of lepidolite beneficiation tailings (referred to as lepidolite tailings) is approximately 20%.
  • the particle size of lepidolite tail mud is less than 200 mesh, which has the problems of slow settling, high moisture content, and difficulty in long-distance transportation and utilization.
  • Chinese patent CN102531394A published "a formula and production process for producing microcrystalline plates using lithium tailings".
  • the raw materials include lithium tailings, calcium carbonate, quartz sand, sodium carbonate, borax, barium carbonate, zinc oxide, etc.
  • Ecological foaming ceramics are usually functional ceramics prepared by using ceramic solid waste as the main raw material, adding an appropriate amount of foaming agent and modifier, sintering and foaming. It contains a uniform and rich pore structure inside, and can be widely used in water treatment and gas purification. and other fields. Ecological foaming ceramics have the advantages of wide application scenarios, large usage, and high replacement frequency. It plays an important role in solving the problem of bulk industrial solid waste consumption and reducing environmental pollution, and will produce good social and economic benefits.
  • Kaolin, quartz and feldspar the main components of lepidolite tail mud, are the main raw materials for preparing high-performance ceramics. Therefore, the preparation and high-value utilization of ecological foam ceramics are expected to realize the bulk consumption of lepidolite tail mud and solve its storage problem and the resulting ecological safety hazards.
  • the purpose of the present invention is to prepare ecological foaming ceramics using all lepidolite tail mud waste as raw materials and using sodium carbonate and silicon carbide as composite foaming agents to solve the bulk consumption problem of lepidolite tail mud.
  • the ceramic can be used in water purification to achieve "waste to treat waste”. Its main technical solutions are as follows:
  • Lepidolite tail mud is used as the main raw material, and sodium carbonate and silicon carbide are used as composite foaming agents.
  • Sodium carbonate is 1%-8% of lepidolite tail mud (dry weight), and silicon carbide is lepidolite tail mud (dry weight). ) 0.5%-2%; ecological foaming ceramics are prepared through ball milling, homogenization, drying, cloth, and heat treatment processes.
  • Ball milling Ball mill the weighed lepidolite tail mud and composite foaming agent. During the wet grinding process, the ball-to-material ratio is 1:1-1.2:1, and the water-to-material ratio is 0.8:1-1.2:1. The ball milling time is 4-8 hours, and an 8-mesh grid is used during the ball milling process to obtain the ball abrasive; the mass of the material is the dry weight of lepidolite tail mud and the total mass of the composite foaming agent.
  • step (3) Drying: Spray dry the homogenized material obtained in step (2) to obtain dry material;
  • step (4) Heat treatment: The green body obtained in step (4) is heat treated. During the heat treatment, the temperature is raised from room temperature to 500-700°C at a heating rate of 8-15°C/min, kept for 20-60min, and heated at 3-8°C. Rise to 1050-1200°C at a heating rate of /min and keep for 30-60min. Cool down to 700-800°C at a cooling rate of 5-10°C/min and keep for 10-30min. After the firing is completed, cool the furnace to room temperature for 80-120min. , to obtain ecological foam ceramics.
  • the pore structure of the foam ceramic prepared by the present invention is controlled by the type, quantity and particle size of the foaming agent; the pore size is affected by the viscosity of the system and can be controlled by adjusting the temperature and composition.
  • the present invention is a method for preparing ecological foaming ceramics from lepidolite tail mud waste. It has the advantages of large utilization of lepidolite tail mud, low foaming agent addition, no other auxiliary raw materials, and effective reduction of raw material costs.
  • Figure 1 is the mineral processing flow chart produced by lepidolite tailings.
  • Figure 2 is a flow chart of the method for preparing ecological foam ceramics from lepidolite tail mud waste.
  • Lepidolite tail mud is used as the main raw material, and sodium carbonate and silicon carbide are used as composite foaming agents.
  • Sodium carbonate is 1% of lepidolite tail mud (dry weight), and silicon carbide is 2% of lepidolite tail mud (dry weight).
  • %; Ecological foam ceramics are prepared through ball milling, homogenization, drying, cloth, heat treatment and other processes. Its main preparation steps are:
  • Ball milling ball mill the weighed lepidolite tail mud and composite foaming agent. During the wet grinding process, the ball-to-material ratio is 1:1, the water-to-material ratio is 0.8:1, the ball milling time is 4h, and the ball mill is discharged In the process, an 8-mesh grid is used to obtain ball abrasive;
  • step (3) Drying: Spray dry the homogenized material obtained in step (2) to obtain dry material;
  • step (4) Heat treatment: The green body obtained in step (4) is heat treated. During the heat treatment, the temperature is raised from room temperature to 500°C at a heating rate of 8°C/min, kept for 20 minutes, and then heated to 1050°C at a heating rate of 3°C/min. °C, keep the temperature for 30 minutes, cool down to 700°C at a cooling rate of 5°C/min and keep it for 10 minutes. After the firing is completed, it is cooled in the furnace for 80 minutes to room temperature to obtain ecological foam ceramics.
  • Lepidolite tail mud is used as the main raw material, and sodium carbonate and silicon carbide are used as composite foaming agents.
  • Sodium carbonate is 8% of lepidolite tail mud (dry weight), and silicon carbide is 0.5% of lepidolite tail mud (dry weight).
  • Ecological foam ceramics are prepared through ball milling, homogenization, drying, cloth, heat treatment and other processes. Its main preparation steps are:
  • Ball milling Ball mill the weighed lepidolite tail mud and composite foaming agent. During the wet grinding process, the ball-to-material ratio is 1.2:1, the water-to-material ratio is 1.2:1, the ball milling time is 8 hours, and the ball mill is discharged In the process, an 8-mesh grid is used to obtain ball abrasive;
  • step (3) Drying: Spray dry the homogenized material obtained in step (2) to obtain dry material;
  • step (4) Heat treatment: The green body obtained in step (4) is heat treated. During the heat treatment, the temperature is raised from room temperature to 700°C at a heating rate of 15°C/min, kept for 60 minutes, and then heated to 1200°C at a heating rate of 8°C/min. °C, keep the temperature for 60 minutes, cool down to 800°C at a cooling rate of 10°C/min and keep it for 30 minutes. After the firing is completed, it is cooled to room temperature for 120 minutes in the furnace to obtain ecological foam ceramics.
  • Lepidolite tail mud is used as the main raw material, and sodium carbonate and silicon carbide are used as composite foaming agents.
  • Sodium carbonate is 5% of lepidolite tail mud (dry weight), and silicon carbide is 1% of lepidolite tail mud (dry weight).
  • %; Ecological foam ceramics are prepared through ball milling, homogenization, drying, cloth, heat treatment and other processes. Its main preparation steps are:
  • Ball milling ball mill the weighed lepidolite tail mud and composite foaming agent. During the wet grinding process, the ball-to-material ratio is 1.1:1, the water-to-material ratio is 1:1, the ball milling time is 6h, and the ball mill is discharged In the process, an 8-mesh grid is used to obtain ball abrasive;
  • step (3) Drying: Spray dry the homogenized material obtained in step (2) to obtain dry material;
  • step (4) Heat treatment: The green body obtained in step (4) is heat treated. During the heat treatment, the temperature is raised from room temperature to 600°C at a heating rate of 10°C/min, kept for 40 minutes, and then heated to 1100°C at a heating rate of 5°C/min. °C, keep the temperature for 40 minutes, cool down to 750°C at a cooling rate of 8°C/min and keep it for 20 minutes. After the firing is completed, it is cooled in the furnace for 100 minutes to room temperature to obtain ecological foam ceramics.
  • Lepidolite tail mud is used as the main raw material, and sodium carbonate and silicon carbide are used as composite foaming agents.
  • Sodium carbonate is 8% of lepidolite tail mud (dry weight), and silicon carbide is 1% of lepidolite tail mud (dry weight).
  • %; Ecological foam ceramics are prepared through ball milling, homogenization, drying, cloth, heat treatment and other processes. Its main preparation steps are:
  • Ball milling ball mill the weighed lepidolite tail mud and composite foaming agent. During the wet grinding process, the ball-to-material ratio is 1.2:1, the water-to-material ratio is 0.8:1, the ball milling time is 4h, and the ball mill is discharged In the process, an 8-mesh grid is used to obtain ball abrasive;
  • step (3) Drying: Spray dry the homogenized material obtained in step (2) to obtain dry material;
  • step (4) Heat treatment: The green body obtained in step (4) is heat treated. During the heat treatment, the temperature is raised from room temperature to 700°C at a heating rate of 8°C/min, kept for 20 minutes, and then heated to 1200°C at a heating rate of 3°C/min. °C, keep the temperature for 30 minutes, cool down to 700°C at a cooling rate of 10°C/min and keep it for 10 minutes. After firing, cool the furnace to room temperature for 120 minutes to obtain ecological foam ceramics.
  • Lepidolite tail mud is used as the main raw material, and sodium carbonate and silicon carbide are used as composite foaming agents.
  • Sodium carbonate is 4% of lepidolite tail mud (dry weight), and silicon carbide is 1.5% of lepidolite tail mud (dry weight).
  • Ecological foam ceramics are prepared through ball milling, homogenization, drying, cloth, heat treatment and other processes. Its main preparation steps are:
  • Ball milling ball mill the weighed lepidolite tail mud and composite foaming agent. During the wet grinding process, the ball-to-material ratio is 1.05:1, the water-to-material ratio is 1.15:1, the ball milling time is 5 hours, and the ball mill is discharged In the process, an 8-mesh grid is used to obtain ball abrasive;
  • step (3) Drying: Spray dry the homogenized material obtained in step (2) to obtain dry material;
  • step (4) Heat treatment: The green body obtained in step (4) is heat treated. During the heat treatment, the temperature is raised from room temperature to 680°C at a heating rate of 12°C/min, kept for 55 minutes, and then heated to 1180°C at a heating rate of 6°C/min. °C, keep the temperature for 45 minutes, cool down to 720°C at a cooling rate of 7°C/min and keep it for 25 minutes. After the firing is completed, the furnace is cooled to room temperature for 90 minutes to obtain ecological foam ceramics.
  • Lepidolite tail mud is used as the main raw material, and sodium carbonate and silicon carbide are used as composite foaming agents.
  • Sodium carbonate is 3% of lepidolite tail mud (dry weight), and silicon carbide is 0.8% of lepidolite tail mud (dry weight).
  • Ecological foam ceramics are prepared through ball milling, homogenization, drying, cloth, heat treatment and other processes. Its main preparation steps are:
  • Ball milling ball mill the weighed lepidolite tail mud and composite foaming agent. During the wet grinding process, the ball-to-material ratio is 1:1, the water-to-material ratio is 1.05:1, the ball milling time is 7 hours, and the ball mill is discharged In the process, an 8-mesh grid is used to obtain ball abrasive;
  • step (3) Drying: Spray dry the homogenized material obtained in step (2) to obtain dry material;
  • step (4) Heat treatment: The green body obtained in step (4) is heat treated. During the heat treatment, the temperature is raised from room temperature to 580°C at a heating rate of 9°C/min, kept for 30 minutes, and then heated to 1080°C at a heating rate of 4°C/min. °C, keep the temperature for 35 minutes, cool down to 780°C at a cooling rate of 6°C/min and keep it for 25 minutes. After firing, cool the furnace to room temperature for 90 minutes to obtain ecological foam ceramics.
  • Table 1 is the performance test results of Examples 1 to 6.

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Abstract

一种锂云母尾泥全废料制备生态发泡陶瓷的方法，属于环境保护和资源再利用领域。以锂云母选矿尾泥(简称锂云母尾泥)为主要原料制备性能优良的生态发泡陶瓷，主要包括球磨、均化、烘干、布料、热处理等工序。其中，锂云母尾泥的添加量占比90％以上，为全废料利用，可实现锂云母尾泥大宗高值化利用；采用复合发泡剂联合发泡技术，相比于单一发泡剂，具有快速发泡和孔径可控等优点；制备得到的生态发泡陶瓷满足CJ/T 299-2008《水处理用人工陶瓷滤料》工业标准，在生活污水处理方面具有潜在的应用价值。

Description

一种锂云母尾泥全废料制备生态发泡陶瓷的方法 技术领域
本发明涉及固废制备生态材料领域，特别涉及利用锂云母尾泥全废料制备生态发泡陶瓷的方法，属于环境保护和资源再利用领域，适用于处理锂云母选矿产生的尾泥，该发明可制备得到满足CJ/T 299-2008《水处理用人工陶瓷滤料》工业标准的生态发泡陶瓷。
 背景技术
锂电产业发展迅猛，锂资源开发利用愈发重要。但是，锂云母矿石品位较低，生产1吨碳酸锂，将产生近200吨的尾矿和尾渣。因此，锂云母尾矿和尾渣的合理处理处置，对保护生态安全具有重要意义。
通过选矿生产锂云母精矿的工艺流程可见说明书附图1，选矿过程中锂云母选矿尾泥(简称锂云母尾泥)的产率大约为20％。锂云母尾泥粒度小于200目，存在沉降慢、含水率高、难以长距离运输和利用的问题。中国专利CN102531394A公布的“一种利用锂尾矿生产微晶板材的配方和生产工艺”，其原料包括锂尾矿、碳酸钙、石英砂、碳酸钠、硼砂、碳酸钡、氧化锌等，此发明中锂尾矿的添加量低于50％，且微晶板材作为高端装饰材料使用量小、市场有限，无法实现大宗消纳利用。中国专利CN108911778A中提出了“一种锂尾矿轻质陶瓷板材的制作方法”，该方法利用锂尾矿制备的泡沫陶瓷板材可以用作建筑隔热保温材料、内外饰材料，具有防火、隔热、吸声特性，但尾矿添加量约为30％，尾矿消纳量小，且产品更替频次低，应用场景受限严重。由于现有技术手段和产品种类对锂云母尾泥的消纳量不足，导致锂云母矿山企业仍以堆存为主要方式处理处置锂云母尾泥，存在较高的生态安全隐患。
生态发泡陶瓷通常是以陶瓷固废为主要原料，加入适量发泡剂、改性剂烧结发泡制备的功能性陶瓷，其内部含有均匀丰富的孔道结构，可广泛应用于水处理、气体净化等领域。生态发泡陶瓷具有应用场景宽泛、使用量大、更替频次高等优点，在解决大宗工业固废消纳和减少环境污染等方面具有重要作用，会产生较好社会效益和经济效益。
锂云母尾泥的主要成分高岭土、石英和长石是制备高性能陶瓷的主要原料。因此，生态发泡陶瓷的制备和高值化利用有望实现锂云母尾泥的大宗消纳，解决其堆存问题和由此产生的生态安全隐患。
发明内容
本发明的目的是以锂云母尾泥全废料为原料，采用了碳酸钠和碳化硅为复合发泡剂，制备得到生态发泡陶瓷，解决锂云母尾泥的大宗消纳问题。同时该陶瓷可应用于水体净化，实现“以废治废”。其主要的技术方案如下：
以锂云母尾泥为主要原料，以碳酸钠和碳化硅为复合发泡剂，其中碳酸钠是锂云母尾泥(干重)的1％-8％，碳化硅是锂云母尾泥(干重)的0.5％-2％；通过球磨、均化、烘干、布料、热处理工序制备得到生态发泡陶瓷。
其制备步骤为：
(1)球磨：将称量好的锂云母尾泥和复合发泡剂进行球磨，湿磨过程中球料比为1:1-1.2:1，水料比为0.8:1-1.2:1，球磨时间为4-8h，球磨放料过程中采用8目网格，得到球磨料；料的质量量是锂云母尾泥干重和复合发泡剂总质量。
(2)均化：将步骤(1)得到的球磨料进行均化，均化过程搅拌速度为0.5-2r/min，均化时间为6-12h，均化后过60目网筛。得到均化料；
(3)烘干：将步骤(2)得到的均化料进行喷雾干燥，得到干料；
(4)布料：将步骤(3)得到的干料进行布料，得到生坯；
(5)热处理：将步骤(4)得到的生坯进行热处理，热处理过程中，自室温以8-15℃/min的升温速率升温至500-700℃，保温20-60min，以3-8℃/min的升温速率升温至1050-1200℃，保温30-60min，以5-10℃/min的降温速率降温到700-800℃保温10-30min，烧成结束后随炉冷却80-120min至室温，得到生态发泡陶瓷。
本发明制备得到的泡沫陶瓷的孔结构由发泡剂的种类、数量和粒度来控制；孔径大小受体系粘度影响，并可以通过调整温度和组成来实现控制。
本发明一种以锂云母尾泥全废料制备生态发泡陶瓷的方法，其具有锂云母尾泥利用量大，发泡剂添加量少，无其他辅助原料，有效降低原料成本的优点。
 附图说明
图1为锂云母尾泥产生的选矿流程图
图2为锂云母尾泥全废料制备生态发泡陶瓷的方法流程图
 具体实施方式
实施例一
以锂云母尾泥为主要原料，以碳酸钠和碳化硅为复合发泡剂，其中碳酸钠是锂云母尾泥(干重)的1％，碳化硅是锂云母尾泥(干重)的2％；通过球磨、均化、烘干、布料、热处理等工序制备得到生态发泡陶瓷。其主要制备步骤为：
(1)球磨：将称量好的锂云母尾泥和复合发泡剂进行球磨，湿磨过程中球料比为1:1，水料比为0.8:1，球磨时间为4h，球磨放料过程中采用8目网格，得到球磨料；
(2)均化：将步骤(1)得到的球磨料进行均化，均化过程搅拌速度为0.5r/min，均化时间为6h，均化后过60目网筛。得到均化料；
(3)烘干：将步骤(2)得到的均化料进行喷雾干燥，得到干料；
(4)布料：将步骤(3)得到的干料进行布料，得到生坯；
(5)热处理：将步骤(4)得到的生坯进行热处理，热处理过程中，自室温以8℃/min的升温速率升温至500℃，保温20min，以3℃/min的升温速率升温至1050℃，保温30min，以5℃/min的降温速率降温到700℃保温10min，烧成结束后随炉冷却80min至室温，得到生态发泡陶瓷。
实施例二
以锂云母尾泥为主要原料，以碳酸钠和碳化硅为复合发泡剂，其中碳酸钠是锂云母尾泥(干重)的8％，碳化硅是锂云母尾泥(干重)的0.5％；通过球磨、均化、烘干、布料、热处理等工序制备得到生态发泡陶瓷。其主要制备步骤为：
(1)球磨：将称量好的锂云母尾泥和复合发泡剂进行球磨，湿磨过程中球料比为1.2:1，水料比为1.2:1，球磨时间为8h，球磨放料过程中采用8目网格，得到球磨料；
(2)均化：将步骤(1)得到的球磨料进行均化，均化过程搅拌速度为2r/min，均化时间为12h，均化后过60目网筛。得到均化料；
(3)烘干：将步骤(2)得到的均化料进行喷雾干燥，得到干料；
(4)布料：将步骤(3)得到的干料进行布料，得到生坯；
(5)热处理：将步骤(4)得到的生坯进行热处理，热处理过程中，自室温以15℃/min的升温速率升温至700℃，保温60min，以8℃/min的升温速率升温至1200℃，保温60min，以10℃/min的降温速率降温到800℃保温30min，烧成结束后随炉冷却120min至室温，得到生态发泡陶瓷。
实施例三
以锂云母尾泥为主要原料，以碳酸钠和碳化硅为复合发泡剂，其中碳酸钠是锂云母尾泥(干重)的5％，碳化硅是锂云母尾泥(干重)的1％；通过球磨、均化、烘干、布料、热处理等工序制备得到生态发泡陶瓷。其主要制备步骤为：
(1)球磨：将称量好的锂云母尾泥和复合发泡剂进行球磨，湿磨过程中球料比为1.1:1，水料比为1:1，球磨时间为6h，球磨放料过程中采用8目网格，得到球磨料；
(2)均化：将步骤(1)得到的球磨料进行均化，均化过程搅拌速度为1r/min，均化时间为8h，均化后过60目网筛。得到均化料；
(3)烘干：将步骤(2)得到的均化料进行喷雾干燥，得到干料；
(4)布料：将步骤(3)得到的干料进行布料，得到生坯；
(5)热处理：将步骤(4)得到的生坯进行热处理，热处理过程中，自室温以10℃/min的升温速率升温至600℃，保温40min，以5℃/min的升温速率升温至1100℃，保温40min，以8℃/min的降温速率降温到750℃保温20min，烧成结束后随炉冷却100min至室温，得到生态发泡陶瓷。
实施例四
以锂云母尾泥为主要原料，以碳酸钠和碳化硅为复合发泡剂，其中碳酸钠是锂云母尾泥(干重)的8％，碳化硅是锂云母尾泥(干重)的1％；通过球磨、均化、烘干、布料、热处理等工序制备得到生态发泡陶瓷。其主要制备步骤为：
(1)球磨：将称量好的锂云母尾泥和复合发泡剂进行球磨，湿磨过程中球料比为1.2:1，水料比为0.8:1，球磨时间为4h，球磨放料过程中采用8目网格，得到球磨料；
(2)均化：将步骤(1)得到的球磨料进行均化，均化过程搅拌速度为2r/min，均化时间为6h，均化后过60目网筛。得到均化料；
(3)烘干：将步骤(2)得到的均化料进行喷雾干燥，得到干料；
(4)布料：将步骤(3)得到的干料进行布料，得到生坯；
(5)热处理：将步骤(4)得到的生坯进行热处理，热处理过程中，自室温以8℃/min的升温速率升温至700℃，保温20min，以3℃/min的升温速率升温至1200℃，保温30min，以10℃/min的降温速率降温到700℃保温10min，烧成结束后随炉冷却120min至室温，得到生态发泡陶瓷。
实施例五
以锂云母尾泥为主要原料，以碳酸钠和碳化硅为复合发泡剂，其中碳酸钠是锂云母尾泥(干重)的4％，碳化硅是锂云母尾泥(干重)的1.5％；通过球磨、均化、烘干、布料、热处理等工序制备得到生态发泡陶瓷。其主要制备步骤为：
(1)球磨：将称量好的锂云母尾泥和复合发泡剂进行球磨，湿磨过程中球料比为1.05:1，水料比为1.15:1，球磨时间为5h，球磨放料过程中采用8目网格，得到球磨料；
(2)均化：将步骤(1)得到的球磨料进行均化，均化过程搅拌速度为1.5r/min，均化时间为8h，均化后过60目网筛。得到均化料；
(3)烘干：将步骤(2)得到的均化料进行喷雾干燥，得到干料；
(4)布料：将步骤(3)得到的干料进行布料，得到生坯；
(5)热处理：将步骤(4)得到的生坯进行热处理，热处理过程中，自室温以12℃/min的升温速率升温至680℃，保温55min，以6℃/min的升温速率升温至1180℃，保温45min,以7℃/min的降温速率降温到720℃保温25min，烧成结束后随炉冷却90min至室温，得到生态发泡陶瓷。
实施例六
以锂云母尾泥为主要原料，以碳酸钠和碳化硅为复合发泡剂，其中碳酸钠是锂云母尾泥(干重)的3％，碳化硅是锂云母尾泥(干重)的0.8％；通过球磨、均化、烘干、布料、热处理等工序制备得到生态发泡陶瓷。其主要制备步骤为：
(1)球磨：将称量好的锂云母尾泥和复合发泡剂进行球磨，湿磨过程中球料比为1:1，水料比为1.05:1，球磨时间为7h，球磨放料过程中采用8目网格，得到球磨料；
(2)均化：将步骤(1)得到的球磨料进行均化，均化过程搅拌速度为1r/min，均化时间为10h，均化后过60目网筛。得到均化料；
(3)烘干：将步骤(2)得到的均化料进行喷雾干燥，得到干料；
(4)布料：将步骤(3)得到的干料进行布料，得到生坯；
(5)热处理：将步骤(4)得到的生坯进行热处理，热处理过程中，自室温以9℃/min的升温速率升温至580℃，保温30min，以4℃/min的升温速率升温至1080℃，保温35min,以6℃/min的降温速率降温到780℃保温25min，烧成结束后随炉冷却90min至室温，得到生态发泡陶瓷。
表1为实施例一至六的性能测试结果表
[援引加入（细则20.6）15.05.2023]

Claims (2)

  1. 一种锂云母尾泥全废料制备生态发泡陶瓷的方法，其特征在于，包括以下步骤：
    (1)球磨：将称量好的锂云母尾泥和复合发泡剂进行球磨，得到球磨料；碳酸钠和碳化硅为复合发泡剂，其中碳酸钠为锂云母尾泥干重的1％-8％，碳化硅为锂云母尾泥干重的0.5％-2％，其中，所述锂云母尾泥的粒度小于200目，球磨采用湿磨的方式，其中球料质量比为1:1-1.2:1，水料质量比为0.8:1-1.2:1，球磨时间为4-8h，球磨放料过程中采用8目网格；料的质量是锂云母尾泥干重和复合发泡剂总质量；
    (2)均化：将步骤(1)得到的球磨料进行均化，得到均化料；
    (3)烘干：将步骤(2)得到的均化料进行喷雾干燥，得到干料；
    (4)布料：将步骤(3)得到的干料进行布料，得到生坯；
    (5)热处理：将步骤(4)得到的生坯进行热处理，得到生态发泡陶瓷，所述生态发泡陶瓷满足CJ/T 299-2008《水处理用人工陶瓷滤料》工业标准；
    热处理具体为：自室温以8-15℃/min的升温速率升温至500-700℃，保温20-60min，以3-8℃/min的升温速率升温至1050-1200℃，保温30-60min，以5-10℃/min的降温速率降温到700-800℃保温10-30min，烧成结束后随炉冷却80-120min至室温。
  2. 根据权利要求1所述的一种锂云母尾泥全废料制备生态发泡陶瓷的方法，其特征在于，所述的步骤(2)中的均化，均化过程搅拌速度为0.5-2r/min，均化时间为6-12h，均化后过60目网筛。
PCT/CN2023/088354 2022-05-09 2023-04-14 一种锂云母尾泥全废料制备生态发泡陶瓷的方法 WO2023216807A1 (zh)

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