一、技术领域：1. Technical field:
本发明属于耐火材料技术领域，具体涉及一种水泥窑预热分解带用轻量高热震耐火材料及其制备方法。The invention belongs to the technical field of refractory materials, and in particular relates to a lightweight high thermal shock refractory material for a cement kiln preheating decomposition zone and a preparation method thereof.
二、背景技术：2. Background technology:
目前，我国新型干法水泥回转窑预热分解带耐火材料主要使用硅莫砖，虽然能够满足使用要求，但是使用该种产品存在以下问题：硅莫砖体积密度大、导热偏高。其高的体积密度使得设备的运转负荷增大、能耗增加；偏高的导热系数容易使得筒体温度偏高，导致水泥生产的燃料消耗升高；运转负荷大和筒体温度偏高易导致筒体变形，影响筒体的使用寿命。At present, silica bricks are mainly used as refractory materials in the preheating decomposition zone of new dry-process cement rotary kiln in my country. Although they can meet the requirements of use, there are following problems in the use of this product: silica bricks have high volume density and high thermal conductivity. Its high bulk density increases the operating load and energy consumption of the equipment; the high thermal conductivity tends to increase the temperature of the cylinder, which leads to an increase in fuel consumption in cement production; the large operating load and high temperature of the cylinder easily lead to Body deformation, affecting the service life of the cylinder.
目前，关于水泥回转窑预热分解带耐火材料也有相关专利文献报道。例如：1、发明专利(CN 105294133 A)公开了一种低导热莫来石碳化硅复合砖及其制备方法，该专利采用莫来石代替部分高铝矾土熟料，并引入氧化铝空心球，虽然导热率和体积密度有所降低，但体积密度仍然偏高，较高的显气孔率使其抗侵蚀性受到影响。2、发明专利(CN 109369203A)公开了一种高强度中密度莫来石砖及其制备方法，该发明是由原料轻质莫来石、废聚轻莫来石砖等制备的中密度莫来石砖，虽然体积密度较低，但其较低的强度难以满足水泥回转窑的使用要求。3、发明专利(CN110452005 A.)公开了一种低导热节能莫来石砖的制备方法，该专利将石砖的整体结构分为工作层和保温层，结构工序复杂，生产效率较低。4、发明专利(CN 107200592 B)公开了一种轻量化超低导莫来石砖及其制备方法，该专利制备的轻量化莫来石砖体积密度较小、导热率低，然而在水泥回转窑采用模块化窑衬技术后，由于在耐火材料工作衬与回转窑金属筒体之间敷设了纳米绝热版等绝热隔热材料，工作衬材料冷端的工作温度由不足300℃温度上升到近1000℃，工作环境的变化对工作衬材料的荷重软化温度等高温性能提出了进一步提升的使用要求；此外，在我国中北部地区实行协同停窑情况下，其较低的热震稳定性难以满足使用要求。At present, there are also relevant patent literature reports on the refractory material in the preheating decomposition zone of the cement rotary kiln. For example: 1. The invention patent (CN 105294133 A) discloses a mullite silicon carbide composite brick with low thermal conductivity and its preparation method. The patent uses mullite to replace part of the high alumina bauxite clinker and introduces alumina hollow spheres , although the thermal conductivity and bulk density have decreased, the bulk density is still high, and the high apparent porosity affects its erosion resistance. 2. The invention patent (CN 109369203A) discloses a high-strength medium-density mullite brick and its preparation method. Although stone bricks have a low volume density, their low strength cannot meet the requirements of cement rotary kilns. 3. The invention patent (CN110452005 A.) discloses a preparation method of low thermal conductivity and energy-saving mullite bricks. In this patent, the overall structure of the stone bricks is divided into a working layer and an insulating layer. The structural process is complicated and the production efficiency is low. 4. The invention patent (CN 107200592 B) discloses a lightweight ultra-low conductivity mullite brick and its preparation method. The lightweight mullite brick prepared by this patent has a small volume density and low thermal conductivity. After the kiln adopts the modular kiln lining technology, the working temperature of the cold end of the working lining material rises from less than 300°C to nearly 1,000 ℃, changes in the working environment put forward further requirements for high-temperature performance such as load softening temperature of the working lining material; in addition, in the case of coordinated kiln shutdown in the central and northern regions of China, its low thermal shock stability is difficult to meet the requirements for use. Require.
三、发明内容：3. Contents of the invention:
本发明要解决的技术问题是：根据目前新型干法水泥回转窑预热分解带耐火材料的发展现状以及存在的问题，本发明提供一种水泥窑预热分解带用轻量高热震耐火材料及其制备方法。利用本发明技术方案制备的轻量高热震耐火材料体积密度小、荷重软化温度高、热震稳定性能好；完全能够适应我国北部地区的工况条件，用于替代硅莫砖，可减轻筒体负荷、降低筒体表面温度，节约能源，延长使用寿命。The technical problem to be solved by the present invention is: according to the development status and existing problems of the refractory material for the preheating decomposition zone of the new dry-process cement rotary kiln, the present invention provides a light-weight high thermal shock refractory material for the preheating decomposition zone of the cement kiln and its preparation method. The light-weight high thermal shock refractory material prepared by the technical solution of the present invention has small volume density, high load softening temperature and good thermal shock stability; it can fully adapt to the working conditions in northern my country, and can be used to replace silica bricks, which can reduce the cylinder body load, reduce the surface temperature of the cylinder, save energy and prolong the service life.
为了解决上述问题，本发明采取的技术方案是：In order to solve the above problems, the technical scheme that the present invention takes is:
本发明提供一种水泥窑预热分解带用轻量高热震耐火材料，以质量百分含量表示，所述轻量高热震耐火材料主要由原料粒度1～5mm的焦宝石45～50％、粒度≤1mm的碳化硅10～15％、粒度≤1mm红柱石10～20％、粒度为350目α-Al2O3微粉3～5％、粒度≤0.088mm的高岭石8～15％和粒度≤0.044mm的结合粘土9～13％组成；另外，加入占上述所有原料总重量3～5％的结合剂。The invention provides a light weight high thermal shock refractory material for cement kiln preheating decomposition zone, expressed in mass percentage, the light weight high thermal shock refractory material is mainly composed of 45% to 50% of coke gemstones with a particle size of 1 ~ 5mm, particle size 10-15% of silicon carbide ≤1mm, 10-20% of andalusite with a particle size of ≤1mm, 3-5% of α-Al2 O3 fine powder with a particle size of 350 mesh, 8-15% of kaolinite with a particle size of ≤0.088mm and particle size 9-13% of bonded clay ≤ 0.044mm; in addition, 3-5% of binder is added to account for the total weight of all the above-mentioned raw materials.
根据上述的水泥窑预热分解带用轻量高热震耐火材料，所述粒度1～5mm的焦宝石45～50％是由粒度3～5mm的焦宝石20～25％和粒度1～3mm的焦宝石25～30％组成。According to the above-mentioned lightweight high thermal shock refractory material for the preheating decomposition zone of a cement kiln, 45-50% of the coke gemstones with a particle size of 1-5mm are composed of 20-25% of the coke gemstones with a particle size of 3-5mm and coke with a particle size of 1-3mm. Gemstones are composed of 25-30%.
根据上述的水泥窑预热分解带用轻量高热震耐火材料，所述粒度≤1mm的碳化硅10～15％是由粒度0～1mm的碳化硅颗粒料5～8％和粒度≤0.088mm的碳化硅5～8％组成。According to the above-mentioned lightweight high thermal shock refractory material for the preheating decomposition zone of a cement kiln, 10-15% of the silicon carbide with a particle size of ≤1 mm is composed of 5-8% of silicon carbide particles with a particle size of 0-1 mm and a particle size of ≤0.088 mm. Silicon carbide 5 to 8% composition.
根据上述的水泥窑预热分解带用轻量高热震耐火材料，所述焦宝石中Al2O3的质量百分含量≥45％、Fe2O3的质量百分含量＜1.0％、K2O和Na2O二者的质量百分含量之和＜0.3％。According to the above-mentioned lightweight high thermal shock refractory material for the preheating decomposition zone of a cement kiln, the mass percentage of Al2 O3 in the burnt gemstone is ≥ 45%, the mass percentage of Fe2 O3 is < 1.0%, K2 The sum of the mass percentages of O and Na2 O is less than 0.3%.
根据上述的水泥窑预热分解带用轻量高热震耐火材料，所述碳化硅中SiC的质量百分含量≥95％、Fe2O3的质量百分含量≤0.7％。According to the above-mentioned lightweight high thermal shock refractory material for preheating decomposition zone of cement kiln, the mass percentage of SiC in the silicon carbide is ≥ 95%, and the mass percentage of Fe2 O3 is ≤ 0.7%.
根据上述的水泥窑预热分解带用轻量高热震耐火材料，所述红柱石中Al2O3的质量百分含量≥57％、Fe2O3的质量百分含量≤0.9％。According to the above-mentioned lightweight high thermal shock refractory material for preheating decomposition zone of cement kiln, the mass percentage of Al2 O3 in the andalusite is ≥57%, and the mass percentage of Fe2 O3 is ≤0.9%.
根据上述的水泥窑预热分解带用轻量高热震耐火材料，所述α-Al2O3微粉中Al2O3的质量百分含量≥99％；所述高岭石中Al2O3的质量百分含量为50～55％、Fe2O3的质量百分含量≤1.2％。According tothe above-mentioned lightweight high thermal shock refractory material for the preheating decomposition zone of a cement kiln, the mass percentage of Al 2 O 3 in the α-Al 2 O 3 micropowder is ≥99%; the Al 2O3inthekaolinite The mass percentage of Fe 2 O 3 is 50-55%, and the mass percentage of Fe2 O3 is ≤1.2%.
根据上述的水泥窑预热分解带用轻量高热震耐火材料，所述结合粘土为广西白泥；所述结合剂为亚硫酸纸浆废液。According to the light-weight high thermal shock refractory material for the preheating decomposition zone of a cement kiln, the binding clay is Guangxi white mud; the binding agent is sulfurous acid pulp waste liquid.
根据上述的水泥窑预热分解带用轻量高热震耐火材料，所述广西白泥中Al2O3的质量百分含量为35～40％、SiO2的质量百分含量为40～50％、Fe2O3的质量百分含量为≤1.0％；所述亚硫酸纸浆废液的比重为1.0～1.1g/cm3。According to the light- weight high thermal shock refractory material used in the preheating decomposition zone of the cement kiln, the mass percentage ofAl2O3 in the Guangxi white mud is 35-40%, and the mass percentage ofSiO2 is 40-50%. , the mass percentage of Fe2 O3 is ≤1.0%; the specific gravity of the sulfurous acid pulp waste liquid is 1.0˜1.1 g/cm3 .
另外，提供一种水泥窑预热分解带用轻量高热震耐火材料的制备方法，所述制备方法包括以下步骤：In addition, a method for preparing a lightweight high thermal shock refractory material for a cement kiln preheating decomposition zone is provided, and the preparation method includes the following steps:
a、混料：首先按照上述轻量高热震耐火材料的配比比例称取各种原料，将称取的焦宝石、红柱石、碳化硅颗粒料加入混练机中混合1～2分钟，接着加入结合剂再继续混炼2～3分钟，然后加入粒度≤0.088mm的碳化硅、高岭石、α-Al2O3微粉和结合粘土粉料继续混练5～10分钟，得到混合物料；a. Mixing: First, weigh various raw materials according to the proportion of the above-mentioned lightweight high thermal shock refractory materials, add the weighed coke gemstone, andalusite, and silicon carbide granules into the mixing machine and mix for 1 to 2 minutes, then Add the binder and continue kneading for 2 to 3 minutes, then add silicon carbide, kaolinite, α-Al2 O3 micropowder and bonded clay powder with a particle size of ≤0.088 mm and continue kneading for 5 to 10 minutes to obtain a mixed material;
b、成型：将所得混合物料用压力机压制成型为砖坯，压力机的压力为315～400吨；B, molding: the obtained mixed material is pressed into brick adobe with a press, and the pressure of the press is 315 to 400 tons;
c、干燥：将所得砖坯置于干燥器中，干燥至残余水分＜0.5％；c. Drying: place the adobe obtained in a drier and dry until the residual moisture is less than 0.5%;
d、将干燥后的砖坯置于高温隧道窑中进行烧成，烧成温度为1350～1500℃，在烧成温度条件下保温时间为8～12小时，烧成结束后进行冷却，冷却后得到轻量高热震耐火材料。d. Put the dried bricks in a high-temperature tunnel kiln for firing. The firing temperature is 1350-1500°C. The holding time is 8-12 hours under the firing temperature conditions. After the firing is completed, it is cooled to obtain Lightweight high thermal shock refractory material.
本发明的积极有益效果：Positive beneficial effect of the present invention:
1、本发明制备所得轻量高热震耐火材料，具有较小的体积密度，使单位筒体上砌体重量降低15％以上，有效降低了筒体负荷，降低了水泥生产能耗，本发明具有显著的经济效益。1. The light-weight high thermal shock refractory material prepared by the present invention has a relatively small volume density, which reduces the weight of the masonry per unit cylinder by more than 15%, effectively reduces the load on the cylinder, and reduces the energy consumption of cement production. The present invention has Significant economic benefits.
2、本发明技术方案中，加入的SiC细粉在烧结过程中氧化成为SiO2，封闭了产品的表面气孔，结合粘土使材料具有较好的烧结性能，使所得产品具有较低的显气孔率和较高的耐压强度。2. In the technical solution of the present invention, the added SiC fine powder is oxidized into SiO2 during the sintering process, which closes the surface pores of the product, and combines with clay to make the material have better sintering performance, so that the obtained product has a lower apparent porosity and high compressive strength.
3、本发明技术方案中，加入的红柱石使材料具有耐高温、热震稳定性强、化学稳定性和抗化学侵蚀性强的优点，采用的红柱石在高温条件下逐步莫来石化，生成的SiO2含量进而与加入的氧化铝细粉形成二次莫来石；柱状、针状莫来石相互交错网络结构，增加了材料的强度，提升了材料的荷重软化温度，使其材料具有良好的热震稳定性和耐冲刷性能；即使回转窑敷设绝热隔热材料，耐火材料靠近筒体端温度大幅上升，也可保证产品的使用寿命。3. In the technical solution of the present invention, the added andalusite makes the material have the advantages of high temperature resistance, strong thermal shock stability, chemical stability and strong chemical erosion resistance. The adopted andalusite is gradually mulliteized under high temperature conditions, forming The content of SiO2 and the added alumina fine powder form secondary mullite; the columnar and acicular mullite interlaced network structure increases the strength of the material, improves the load softening temperature of the material, and makes the material have good Excellent thermal shock stability and erosion resistance; even if the rotary kiln is laid with thermal insulation materials, the temperature of the refractory material near the end of the cylinder will rise sharply, and the service life of the product can be guaranteed.
综上所述，利用本发明技术方案制备的轻量高热震耐火材料体积密度小、荷重软化温度高、热震稳定性能好；完全能够适应我国北部地区的工况条件，用于替代硅莫砖，可减轻筒体负荷、降低筒体表面温度，节约能源，延长使用寿命。In summary, the lightweight high thermal shock refractory material prepared by the technical solution of the present invention has small volume density, high load softening temperature, and good thermal shock stability; it can fully adapt to the working conditions in northern my country and can be used to replace silicon molybdenum bricks , can reduce the cylinder load, lower the surface temperature of the cylinder, save energy and prolong the service life.
四、具体实施方式：Fourth, the specific implementation method:
以下结合实施例进一步阐述本发明，但并不限制本发明技术方案保护的范围。The present invention is further described below in conjunction with the examples, but the scope of protection of the technical solution of the present invention is not limited.
本发明实施例中，采用的焦宝石中Al2O3的质量百分含量≥45％、Fe2O3的质量百分含量＜1.0％、K2O和Na2O二者的质量百分含量之和＜0.3％；碳化硅中SiC的质量百分含量≥95％、Fe2O3的质量百分含量≤0.7％；所述红柱石中Al2O3的质量百分含量≥57％、Fe2O3的质量百分含量≤0.9％；所述α-Al2O3微粉中Al2O3的质量百分含量≥99％；所述高岭石中Al2O3的质量百分含量为50～55％、Fe2O3的质量百分含量≤1.2％；采用的结合粘土为广西白泥，所述广西白泥中Al2O3的质量百分含量为35～40％、SiO2的质量百分含量为40～50％、Fe2O3的质量百分含量为≤1.0％；采用的结合剂为亚硫酸纸浆废液，所述亚硫酸纸浆废液的比重为1.0～1.1g/cm3。In the embodiment of the present invention, the mass percentage of Al2 O3 in the used coke gem is ≥ 45%, the mass percentage of Fe2 O3 is < 1.0%, and the mass percentage of both K2 O and Na2 O The sum of the contents is less than 0.3%; the mass percentage of SiC in silicon carbide is ≥95%, and the mass percentage of Fe2 O3 is ≤0.7%; the mass percentage of Al2 O3 in the andalusite is ≥57% , the mass percentage of Fe2 O3 ≤ 0.9%; themass percentage of Al 2 O 3 in the α-Al 2 O 3 micropowder ≥ 99%; the mass percentage of Al 2O3inthekaolinite The content of Al 2 O 3 is 50-55%, and the mass percentage of Fe2 O3 is ≤1.2%; the combined clay used is Guangxi white mud, and the mass percentage of Al2 O3 in the Guangxi white mud is 35-40% , the mass percent content of SiO2 is 40～50%, the mass percent content of Fe2 O3 is ≤1.0%; ~1.1 g/cm3 .
实施例1：Example 1:
本发明水泥窑预热分解带用轻量高热震耐火材料，以质量百分含量表示，其原料组成为：粒度1～5mm的焦宝石50％、粒度≤1mm的碳化硅15％、粒度≤1mm红柱石10％、粒度为350目α-Al2O3微粉5％、粒度≤0.088mm的高岭石8％和粒度≤0.044mm的结合粘土12％组成；另外，加入占上述所有原料总重量3％的结合剂亚硫酸纸浆废液。The light-weight high thermal shock refractory material used in the preheating decomposition zone of the cement kiln of the present invention is represented by mass percentage, and its raw material composition is: 50% of coke gems with a particle size of 1-5mm, 15% of silicon carbide with a particle size of ≤1mm, and a particle size of ≤1mm 10% of andalusite, 5% of α-Al2 O3 fine powder with a particle size of 350 mesh, 8% of kaolinite with a particle size of ≤0.088mm, and 12% of bonded clay with a particle size of ≤0.044mm; 3% binder sulfurous acid pulp waste liquor.
所述粒度1～5mm的焦宝石50％是由粒度3～5mm的焦宝石25％和粒度1～3mm的焦宝石25％组成；50% of the burnt gemstones with a particle size of 1-5mm are composed of 25% of the burnt gemstones with a particle size of 3-5mm and 25% of the burnt gemstones with a particle size of 1-3mm;
所述粒度≤1mm的碳化硅15％是由粒度0～1mm的碳化硅颗粒料8％和粒度≤0.088mm的碳化硅7％组成。The 15% silicon carbide with a particle size of ≤1mm is composed of 8% of silicon carbide particles with a particle size of 0-1mm and 7% of silicon carbide with a particle size of ≤0.088mm.
实施例2：Example 2:
本发明水泥窑预热分解带用轻量高热震耐火材料，以质量百分含量表示，其原料组成为：粒度1～5mm的焦宝石48％、粒度≤1mm的碳化硅12％、粒度≤1mm红柱石13％、粒度为350目α-Al2O3微粉3％、粒度≤0.088mm的高岭石12％和粒度≤0.044mm的结合粘土12％组成；另外，加入占上述所有原料总重量3.5％的结合剂亚硫酸纸浆废液。The light-weight high thermal shock refractory material used in the preheating decomposition zone of the cement kiln of the present invention is represented by mass percentage, and its raw material composition is: 48% of burnt gems with a particle size of 1-5mm, 12% of silicon carbide with a particle size of ≤1mm, and a particle size of ≤1mm 13% of andalusite, 3% of α-Al2 O3 fine powder with a particle size of 350 mesh, 12% of kaolinite with a particle size of ≤0.088mm, and 12% of bonded clay with a particle size of ≤0.044mm; 3.5% binder sulfurous acid pulp waste liquor.
所述粒度1～5mm的焦宝石48％是由粒度3～5mm的焦宝石22％和粒度1～3mm的焦宝石26％组成；The 48% of burnt gemstones with a particle size of 1-5mm are composed of 22% of burnt gemstones with a particle size of 3-5mm and 26% of burnt gemstones with a particle size of 1-3mm;
所述粒度≤1mm的碳化硅12％是由粒度0～1mm的碳化硅颗粒料6％和粒度≤0.088mm的碳化硅6％组成。The 12% silicon carbide with a particle size of ≤1mm is composed of 6% of silicon carbide particles with a particle size of 0-1mm and 6% of silicon carbide with a particle size of ≤0.088mm.
实施例3：Example 3:
本发明水泥窑预热分解带用轻量高热震耐火材料，以质量百分含量表示，其原料组成为：粒度1～5mm的焦宝石45％、粒度≤1mm的碳化硅10％、粒度≤1mm红柱石18％、粒度为350目α-Al2O3微粉3％、粒度≤0.088mm的高岭石14％和粒度≤0.044mm的结合粘土10％组成；另外，加入占上述所有原料总重量4％的结合剂亚硫酸纸浆废液。The light-weight high thermal shock refractory material used in the preheating decomposition zone of the cement kiln of the present invention is represented by mass percentage, and its raw material composition is: 45% of burnt gems with a particle size of 1-5mm, 10% of silicon carbide with a particle size of ≤1mm, and a particle size of ≤1mm 18% of andalusite, 3% of α-Al2 O3 fine powder with a particle size of 350 mesh, 14% of kaolinite with a particle size of ≤0.088mm, and 10% of bonded clay with a particle size of ≤0.044mm; 4% binder sulfurous acid pulp waste liquor.
所述粒度1～5mm的焦宝石45％是由粒度3～5mm的焦宝石20％和粒度1～3mm的焦宝石25％组成；45% of the burnt gemstones with a particle size of 1-5mm are composed of 20% of the burnt gemstones with a particle size of 3-5mm and 25% of the burnt gemstones with a particle size of 1-3mm;
所述粒度≤1mm的碳化硅10％是由粒度0～1mm的碳化硅颗粒料5％和粒度≤0.088mm的碳化硅5％组成。The 10% silicon carbide with a particle size of ≤1mm is composed of 5% of silicon carbide particles with a particle size of 0-1mm and 5% of silicon carbide with a particle size of ≤0.088mm.
实施例4：Example 4:
本发明水泥窑预热分解带用轻量高热震耐火材料，以质量百分含量表示，其原料组成为：粒度1～5mm的焦宝石48％、粒度≤1mm的碳化硅12％、粒度≤1mm红柱石15％、粒度为350目α-Al2O3微粉4％、粒度≤0.088mm的高岭石10％和粒度≤0.044mm的结合粘土11％组成；另外，加入占上述所有原料总重量3.5％的结合剂亚硫酸纸浆废液。The light-weight high thermal shock refractory material used in the preheating decomposition zone of the cement kiln of the present invention is represented by mass percentage, and its raw material composition is: 48% of burnt gems with a particle size of 1-5mm, 12% of silicon carbide with a particle size of ≤1mm, and a particle size of ≤1mm 15% of andalusite, 4% of α-Al2 O3 fine powder with a particle size of 350 mesh, 10% of kaolinite with a particle size of ≤0.088mm, and 11% of bonded clay with a particle size of ≤0.044mm; 3.5% binder sulfurous acid pulp waste liquor.
所述粒度1～5mm的焦宝石48％是由粒度3～5mm的焦宝石20％和粒度1～3mm的焦宝石28％组成；The 48% of burnt gemstones with a particle size of 1-5mm are composed of 20% of burnt gemstones with a particle size of 3-5mm and 28% of burnt gemstones with a particle size of 1-3mm;
所述粒度≤1mm的碳化硅12％是由粒度0～1mm的碳化硅颗粒料5％和粒度≤0.088mm的碳化硅7％组成。The 12% silicon carbide with a particle size of ≤1mm is composed of 5% of silicon carbide particles with a particle size of 0-1mm and 7% of silicon carbide with a particle size of ≤0.088mm.
实施例5：Example 5:
本发明实施例1所述水泥窑预热分解带用轻量高热震耐火材料的制备方法，其详细步骤如下：The preparation method of the lightweight high thermal shock refractory material for the cement kiln preheating decomposition zone described in Example 1 of the present invention, its detailed steps are as follows:
a、混料：首先按照实施例1所述轻量高热震耐火材料的配比比例称取各种原料，将称取的焦宝石、红柱石、碳化硅颗粒料加入混练机中混合2分钟，接着加入结合剂再继续混炼2分钟，然后加入粒度≤0.088mm的碳化硅、高岭石、α-Al2O3微粉和结合粘土粉料继续混练8分钟，得到混合物料；a. Mixing: First, weigh various raw materials according to the proportioning ratio of the lightweight high thermal shock refractory material described in Example 1, add the weighed coke gemstone, andalusite, and silicon carbide granules into the mixing machine and mix for 2 minutes , then add the binder and continue kneading for 2 minutes, then add silicon carbide, kaolinite, α-Al2O3 micropowder and bonded clay powder with a particle size of ≤0.088mm and continue kneading for 8 minutes to obtain a mixed material;
b、成型：将所得混合物料用压力机压制成型为砖坯，压力机的压力为350吨；B, forming: the obtained mixed material is pressed into brick adobe with a press, and the pressure of the press is 350 tons;
c、干燥：将所得砖坯置于干燥器中，干燥至残余水分＜0.5％；c. Drying: place the adobe obtained in a drier and dry until the residual moisture is less than 0.5%;
d、将干燥后的砖坯置于高温隧道窑中进行烧成，烧成温度为1400℃，在烧成温度条件下保温时间为11小时，烧成结束后进行冷却，冷却后得到轻量高热震耐火材料。d. Put the dried bricks in a high-temperature tunnel kiln for firing. The firing temperature is 1400°C. The holding time is 11 hours under the firing temperature conditions. After the firing, it is cooled to obtain light weight and high thermal shock. refractory material.
实施例6：Embodiment 6:
本发明实施例2所述水泥窑预热分解带用轻量高热震耐火材料的制备方法，与实施例5基本相同，不同之处在于：The preparation method of the lightweight high thermal shock refractory material for the cement kiln preheating decomposition zone described in Example 2 of the present invention is basically the same as that of Example 5, except that:
步骤d中：所述烧成温度为1420℃，保温时间为10小时。In step d: the firing temperature is 1420° C., and the holding time is 10 hours.
实施例7：Embodiment 7:
本发明实施例3所述水泥窑预热分解带用轻量高热震耐火材料的制备方法，与实施例5基本相同，不同之处在于：The preparation method of the lightweight high thermal shock refractory material for the cement kiln preheating decomposition zone described in Example 3 of the present invention is basically the same as Example 5, except that:
步骤d中：所述烧成温度为1450℃，保温时间为10小时。In step d: the firing temperature is 1450° C., and the holding time is 10 hours.
实施例8：Embodiment 8:
本发明实施例4所述水泥窑预热分解带用轻量高热震耐火材料的制备方法，与实施例5基本相同，不同之处在于：The preparation method of the lightweight high thermal shock refractory material for the cement kiln preheating decomposition zone described in Example 4 of the present invention is basically the same as Example 5, except that:
步骤d中：所述烧成温度为1420℃，保温时间为11小时。In step d: the firing temperature is 1420° C., and the holding time is 11 hours.
本发明实施例1～4制备所得轻量高热震耐火材料的相关性能数据详见表1。See Table 1 for the relevant performance data of the lightweight high thermal shock refractory materials prepared in Examples 1-4 of the present invention.
表1利用本发明实施例1～4制备所得轻量高热震耐火材料的相关性能数据Table 1. Relevant performance data of lightweight high thermal shock refractory materials prepared by using Examples 1 to 4 of the present invention
由上述本发明实施例制备所得产品的相关性能检测数据可以看出：本发明产品具有较低的体积密度，能够降低水泥窑内衬自重，自重的减轻有效的降低了设备运转时的电机负荷和吨产品的电耗，同时提高了设备长期运行的稳定性；本发明产品较低的体积密度相应具有较低的导热系数，使水泥窑筒体温度降低，减小了筒体变形，还能减少热量损失；本发明产品具有良好的热震稳定性能，能够适应北方地区协同停窑导致的温度变化；本发明产品具有高的荷重软化温度，可以适应采用保温材料导致的内衬莫来石砖整体温度升高带来的不利影响；保证了产品长的使用寿命。It can be seen from the relevant performance test data of the products prepared by the above-mentioned embodiments of the present invention that the products of the present invention have a lower bulk density, which can reduce the self-weight of the cement kiln lining, and the reduction of the self-weight effectively reduces the motor load and At the same time, the stability of the long-term operation of the equipment is improved; the lower bulk density of the product of the present invention has a correspondingly lower thermal conductivity, which reduces the temperature of the cement kiln shell, reduces the deformation of the shell, and can also reduce Heat loss; the product of the present invention has good thermal shock stability and can adapt to temperature changes caused by coordinated kiln shutdown in the northern region; the product of the present invention has a high load softening temperature and can adapt to the overall mullite brick lining caused by the use of thermal insulation materials Adverse effects brought about by temperature rise; ensure a long service life of the product.
综上所述，本发明轻量高热震耐火材料适应水泥回转窑预热分解带工况条件需求。与现有的材料相比，对高温和温度变化的抵抗能力强；同时减少了筒体自重，降低了筒体温度，节约了能源，降低了生产成本。适应了当今能源节约、绿色环保的社会发展需要，具有广阔的应用前景。因此，本发明具有显著的经济效益和社会效益。To sum up, the light weight high thermal shock refractory material of the present invention is suitable for the working conditions of the preheating decomposition zone of the cement rotary kiln. Compared with existing materials, it has strong resistance to high temperature and temperature change; at the same time, it reduces the dead weight of the cylinder, lowers the temperature of the cylinder, saves energy, and reduces production costs. It adapts to the social development needs of today's energy saving and green environmental protection, and has broad application prospects. Therefore, the present invention has remarkable economic benefit and social benefit.
| Application Number | Priority Date | Filing Date | Title |
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| CN202310563163.XACN116553939B (en) | 2023-05-18 | 2023-05-18 | Lightweight high thermal shock refractory material for cement kiln preheating decomposition zone and preparation method thereof |
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| CN202310563163.XACN116553939B (en) | 2023-05-18 | 2023-05-18 | Lightweight high thermal shock refractory material for cement kiln preheating decomposition zone and preparation method thereof |
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| CN116553939B CN116553939B (en) | 2024-08-23 |
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| CN202310563163.XAActiveCN116553939B (en) | 2023-05-18 | 2023-05-18 | Lightweight high thermal shock refractory material for cement kiln preheating decomposition zone and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070167308A1 (en)* | 2001-01-26 | 2007-07-19 | Pedro Fajardo Sola | Refractory material for cement industry kilns and use thereof |
| CN101844933A (en)* | 2010-05-18 | 2010-09-29 | 上海彭浦特种耐火材料厂 | Refractory castable for desulfurizing spray gun for pretreating molten iron |
| CN102701763A (en)* | 2012-06-08 | 2012-10-03 | 安徽瑞泰新材料科技有限公司 | Low-aluminum sintered alumina-silica refractory material and preparation method thereof |
| CN106145976A (en)* | 2016-07-04 | 2016-11-23 | 瑞泰科技股份有限公司 | Cement kiln andalusite mullite silicon carbide brick and preparation method thereof |
| CN106187236A (en)* | 2016-07-21 | 2016-12-07 | 济源市金峰耐火材料有限公司 | Flint clay composite refractory brick and its preparation method and application |
| CN107200592A (en)* | 2017-05-19 | 2017-09-26 | 河南瑞泰耐火材料科技有限公司 | A kind of lightweight is ultralow to lead mullite brick and preparation method thereof |
| CN110483028A (en)* | 2019-08-30 | 2019-11-22 | 仲卫军 | Foundry ladle burning-free mullite silicon carbide brick and preparation method thereof |
| CN113651621A (en)* | 2021-08-30 | 2021-11-16 | 郑州瑞泰耐火科技有限公司 | Special novel silicon mullite brick for cement rotary kiln and preparation process thereof |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070167308A1 (en)* | 2001-01-26 | 2007-07-19 | Pedro Fajardo Sola | Refractory material for cement industry kilns and use thereof |
| CN101844933A (en)* | 2010-05-18 | 2010-09-29 | 上海彭浦特种耐火材料厂 | Refractory castable for desulfurizing spray gun for pretreating molten iron |
| CN102701763A (en)* | 2012-06-08 | 2012-10-03 | 安徽瑞泰新材料科技有限公司 | Low-aluminum sintered alumina-silica refractory material and preparation method thereof |
| CN106145976A (en)* | 2016-07-04 | 2016-11-23 | 瑞泰科技股份有限公司 | Cement kiln andalusite mullite silicon carbide brick and preparation method thereof |
| CN106187236A (en)* | 2016-07-21 | 2016-12-07 | 济源市金峰耐火材料有限公司 | Flint clay composite refractory brick and its preparation method and application |
| CN107200592A (en)* | 2017-05-19 | 2017-09-26 | 河南瑞泰耐火材料科技有限公司 | A kind of lightweight is ultralow to lead mullite brick and preparation method thereof |
| CN110483028A (en)* | 2019-08-30 | 2019-11-22 | 仲卫军 | Foundry ladle burning-free mullite silicon carbide brick and preparation method thereof |
| CN113651621A (en)* | 2021-08-30 | 2021-11-16 | 郑州瑞泰耐火科技有限公司 | Special novel silicon mullite brick for cement rotary kiln and preparation process thereof |
| Publication number | Publication date |
|---|---|
| CN116553939B (en) | 2024-08-23 |
| Publication | Publication Date | Title |
|---|---|---|
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