CN106966739A - 一种改良的rh喷补料 - Google Patents
一种改良的rh喷补料 Download PDFInfo
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- 239000011819 refractory material Substances 0.000 title claims abstract description 22
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 65
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 65
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 65
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 65
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 47
- 239000000843 powder Substances 0.000 claims abstract description 41
- 238000003303 reheating Methods 0.000 claims abstract description 40
- 239000002245 particle Substances 0.000 claims abstract description 30
- 230000036571 hydration Effects 0.000 claims abstract description 20
- 238000006703 hydration reaction Methods 0.000 claims abstract description 20
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 9
- 239000000440 bentonite Substances 0.000 claims abstract description 9
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 9
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 9
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 9
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 9
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims abstract description 9
- 239000011339 hard pitch Substances 0.000 claims abstract description 9
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 9
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 8
- 235000019795 sodium metasilicate Nutrition 0.000 claims abstract description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 8
- 239000004615 ingredient Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 235000019580 granularity Nutrition 0.000 claims description 43
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 241001502050 Acis Species 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 150000002148 esters Chemical class 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000007598 dipping method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 7
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- 238000000034 method Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000007767 bonding agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 230000002742 anti-folding effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000004523 agglutinating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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Abstract
本发明涉及一种改良的RH喷补料，由以下原料组成：重烧镁砂颗粒、中档镁砂颗粒、中档镁砂细粉、CA‑50水泥、膨润土、六偏磷酸钠、磷酸二氢铝、硅酸钠、羧甲基纤维素、高温沥青粉和氧化锆粉；其制备过程为1)重烧镁砂、中档镁砂防水化预处理；2)重烧镁砂、中档镁砂破碎、筛分；3)配料混炼；本发明通过对重烧镁砂和中档镁砂进行防水化预处理，使其颗粒表面产生覆膜效果，能够在提高喷补料各项性能指标的基础上，有效防止水化现象发生，保证喷补料的使用效果。
Description
技术领域
本发明涉及耐火材料技术领域，尤其涉及一种改良的RH喷补料。
背景技术
喷补技术是采用机械方法将耐火材料喷补在冶金炉体内衬表面以防止内补快速蚀损的方法，喷补的料层经受冶炼时的热负荷，保护炉衬免受熔渣、钢液、气体作用，是保护炉衬的一个十分有效的技术措施。喷补料的喷补性能(附着性、烧结性等)和抗侵蚀性能(抗渣性、耐磨性等)取决于原料的组成、粒度分布以及结合剂的性能。
通过实践证明，喷补料损毁的主要原因是剥落而不是蚀损，采用高纯原料时更是如此，而喷补料层与母材之间界面的粘结强度不够是导致喷补料层剥落的主要原因。对于炼钢冶炼操作而言，选用重烧镁砂作为原料能够降低熔渣的熔损速度，提高耐蚀性能。喷补料的结合剂常采用磷酸盐，其耐碱性能和粘性都优于硅酸盐，高温强度和抗热震性也较好，研究和实验应用结果表明，磷酸盐结合剂可与耐火骨料形成耐高温胶凝材料，是喷补料中较为理想的结合系统。
但是采用重烧镁砂原料与磷酸盐结合剂生产喷补料时，当重烧镁砂中CaO/SiO2＞2或重烧镁砂中CaO含量较高时，容易发生水化作用导致厚的喷补料层产生剥落；此时，采用表面覆膜技术能够有效防止水化现象的发生。
发明内容
本发明提供了一种改良的RH喷补料，通过对重烧镁砂和中档镁砂进行防水化预处理，使其颗粒表面产生覆膜效果，能够在提高喷补料各项性能指标的基础上，有效防止水化现象发生，保证喷补料的使用效果。
为了达到上述目的，本发明采用以下技术方案实现：
一种改良的RH喷补料，RH喷补料由以下原料按重量份比例组成：1mm＜粒度≤3mm的重烧镁砂颗粒35～45份；2mm＜粒度≤3mm的中档镁砂颗粒5～10份，1mm＜粒度≤2mm的中档镁砂颗粒10～15份，0mm＜粒度≤1mm的中档镁砂细粉10～20份，200目的中档镁砂细粉10～20份；CA-50水泥0.5～5份；膨润土0.5～3份；六偏磷酸钠1～4份；磷酸二氢铝1～8份；硅酸钠1～8份；羧甲基纤维素0.05～0.1份；高温沥青粉1～3份；氧化锆粉1～3份；
RH喷补料的制备过程如下：
1)重烧镁砂、中档镁砂防水化预处理；
将重烧镁砂和中档镁砂分别放入密闭容器中，加入防水化剂浸渍2～4小时，同时外加0.1～0.3MPa的压力进行加压渗透；防水化剂为有机硅与乙酰丙酮、硅酸酯的混合溶液；各组分按重量份比例为：有机硅85～95份；乙酰丙酮4～8份；硅酸酯3～6份；浸渍结束后将烧结镁砂和中档镁砂取出并烘干；
2)重烧镁砂、中档镁砂破碎、筛分；
将防水化预处理后的重烧镁砂破碎，筛分出1mm＜粒度≤3mm的重烧镁砂颗粒备用；
将防水化预处理后的中档镁砂破碎，筛分出2mm＜粒度≤3mm、1mm＜粒度≤2mm和0mm＜粒度≤1mm的中档镁砂细粉，以及200目的中档镁砂细粉；
3)配料混炼；
原料按配比依次投入混合机中混炼，先加入1mm＜粒度≤3mm的重烧镁砂颗粒、2mm＜粒度≤3mm的中档镁砂颗粒和1mm＜粒度≤2mm的中档镁砂颗粒，混炼5～10分钟；再加入CA-50水泥、膨润土、六偏磷酸钠、磷酸二氢铝、硅酸钠、羧甲基纤维素、高温沥青粉和氧化锆粉，混炼10～15分钟；最后加入0mm＜粒度≤1mm的中档镁砂细粉和200目的中档镁砂细粉，混炼10～15分钟；出料；
4)RH喷补料成品理化指标：MgO≥95；SiO2+Al2O3≤1.0；1500℃×3h条件下，抗折强度≥7.0MPa，耐压强度≥30MPa，重烧镁砂＜1％；110℃×8h条件下，抗折强度≥2.5MPa，耐压强度≥10MPa；体积密度≥2.8g/cm3；显气孔率≤20％；附着率≥95％。
与现有技术相比，本发明的有益效果是：
1)以重烧镁砂和中档镁砂作为原料，优化粒度等级分布，提高喷补料的耐用性；使其对高温、钢液及溶渣作用具有足够的抵抗性，且具有良好的结合性、机械强度、热震稳定性；
2)六偏磷酸钠、磷酸二氢铝、硅酸钠同时作为结合剂和减水剂，能够起到减水增强的效果；高温沥青粉和氧化锆粉能够防止喷补料在高温状态下过烧结形成裂纹；膨润土早期粘接性好，能够提高混合料的可塑性；羧甲基纤维素能够提高附着性；CA-50水泥具有快硬、早强、耐腐蚀、耐高温的特性，能够提高喷补料的耐火强度；
3)重烧镁砂和中档镁砂进行防水化预处理，使其颗粒表面产生覆膜效果，能够在提高喷补料各项性能指标的基础上，有效防止水化现象发生。
具体实施方式
本发明所述一种改良的RH喷补料，RH喷补料由以下原料按重量份比例组成：1mm＜粒度≤3mm的重烧镁砂颗粒35～45份；2mm＜粒度≤3mm的中档镁砂颗粒5～10份，1mm＜粒度≤2mm的中档镁砂颗粒10～15份，0mm＜粒度≤1mm的中档镁砂细粉10～20份，200目的中档镁砂细粉10～20份；CA-50水泥0.5～5份；膨润土0.5～3份；六偏磷酸钠1～4份；磷酸二氢铝1～8份；硅酸钠1～8份；羧甲基纤维素0.05～0.1份；高温沥青粉1～3份；氧化锆粉1～3份；
RH喷补料的制备过程如下：
1)重烧镁砂、中档镁砂防水化预处理；
将重烧镁砂和中档镁砂分别放入密闭容器中，加入防水化剂浸渍2～4小时，同时外加0.1～0.3MPa的压力进行加压渗透；防水化剂为有机硅与乙酰丙酮、硅酸酯的混合溶液；各组分按重量份比例为：有机硅85～95份；乙酰丙酮4～8份；硅酸酯3～6份；浸渍结束后将烧结镁砂和中档镁砂取出并烘干；
2)重烧镁砂、中档镁砂破碎、筛分；
将防水化预处理后的重烧镁砂破碎，筛分出1mm＜粒度≤3mm的重烧镁砂颗粒备用；
将防水化预处理后的中档镁砂破碎，筛分出2mm＜粒度≤3mm、1mm＜粒度≤2mm和0mm＜粒度≤1mm的中档镁砂细粉，以及200目的中档镁砂细粉；
3)配料混炼；
原料按配比依次投入混合机中混炼，先加入1mm＜粒度≤3mm的重烧镁砂颗粒、2mm＜粒度≤3mm的中档镁砂颗粒和1mm＜粒度≤2mm的中档镁砂颗粒，混炼5～10分钟；再加入CA-50水泥、膨润土、六偏磷酸钠、磷酸二氢铝、硅酸钠、羧甲基纤维素、高温沥青粉和氧化锆粉，混炼10～15分钟；最后加入0mm＜粒度≤1mm的中档镁砂细粉和200目的中档镁砂细粉，混炼10～15分钟；出料；
4)RH喷补料成品理化指标：MgO≥95；SiO2+Al2O3≤1.0；1500℃×3h条件下，抗折强度≥7.0MPa，耐压强度≥30MPa，重烧镁砂＜1％；110℃×8h条件下，抗折强度≥2.5MPa，耐压强度≥10MPa；体积密度≥2.8g/cm3；显气孔率≤20％；附着率≥95％。
以下实施例在以本发明技术方案为前提下进行实施，给出了详细的实施方式和具体的操作过程，但本发明的保护范围不限于下述的实施例。下述实施例中所用方法如无特别说明均为常规方法。
【实施例】
本实施例中，所述RH喷补料的原料组成如下表所示：
本实施例所述RH喷补料的制备过程如下：
1、重烧镁砂、中档镁砂防水化预处理；
将重烧镁砂和中档镁砂分别放入密闭容器中，加入防水化剂浸渍3小时，同时外加0.2MPa的压力进行加压渗透；防水化剂为有机硅与乙酰丙酮、硅酸酯的混合溶液；各组分按重量份比例为：有机硅85份；乙酰丙酮4份；硅酸酯6份；浸渍结束后将烧结镁砂和中档镁砂取出并烘干；
2)重烧镁砂、中档镁砂破碎、筛分；
将防水化预处理后的重烧镁砂破碎，筛分出1mm＜粒度≤3mm的重烧镁砂颗粒备用；
将防水化预处理后的中档镁砂破碎，筛分出2mm＜粒度≤3mm、1mm＜粒度≤2mm和0mm＜粒度≤1mm的中档镁砂细粉，以及200目的中档镁砂细粉；
3)配料混炼；
原料按配比依次投入混合机中混炼，先加入1mm＜粒度≤3mm的重烧镁砂颗粒、2mm＜粒度≤3mm的中档镁砂颗粒和1mm＜粒度≤2mm的中档镁砂颗粒，混炼7分钟；再加入CA-50水泥、膨润土、六偏磷酸钠、磷酸二氢铝、硅酸钠、羧甲基纤维素、高温沥青粉和氧化锆粉，混炼15分钟；最后加入0mm＜粒度≤1mm的中档镁砂细粉和200目的中档镁砂细粉，混炼10分钟；出料；
4)RH喷补料成品理化指标如下表所示：
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。
Claims (1)
1.一种改良的RH喷补料，其特征在于，RH喷补料由以下原料按重量份比例组成：1mm＜粒度≤3mm的重烧镁砂颗粒35～45份；2mm＜粒度≤3mm的中档镁砂颗粒5～10份，1mm＜粒度≤2mm的中档镁砂颗粒10～15份，0mm＜粒度≤1mm的中档镁砂细粉10～20份，200目的中档镁砂细粉10～20份；CA-50水泥0.5～5份；膨润土0.5～3份；六偏磷酸钠1～4份；磷酸二氢铝1～8份；硅酸钠1～8份；羧甲基纤维素0.05～0.1份；高温沥青粉1～3份；氧化锆粉1～3份；
RH喷补料的制备过程如下：
1)重烧镁砂、中档镁砂防水化预处理；
将重烧镁砂和中档镁砂分别放入密闭容器中，加入防水化剂浸渍2～4小时，同时外加0.1～0.3MPa的压力进行加压渗透；防水化剂为有机硅与乙酰丙酮、硅酸酯的混合溶液；各组分按重量份比例为：有机硅85～95份；乙酰丙酮4～8份；硅酸酯3～6份；浸渍结束后将烧结镁砂和中档镁砂取出并烘干；
2)重烧镁砂、中档镁砂破碎、筛分；
将防水化预处理后的重烧镁砂破碎，筛分出1mm＜粒度≤3mm的重烧镁砂颗粒备用；
将防水化预处理后的中档镁砂破碎，筛分出2mm＜粒度≤3mm、1mm＜粒度≤2mm和0mm＜粒度≤1mm的中档镁砂细粉，以及200目的中档镁砂细粉；
3)配料混炼；
原料按配比依次投入混合机中混炼，先加入1mm＜粒度≤3mm的重烧镁砂颗粒、2mm＜粒度≤3mm的中档镁砂颗粒和1mm＜粒度≤2mm的中档镁砂颗粒，混炼5～10分钟；再加入CA-50水泥、膨润土、六偏磷酸钠、磷酸二氢铝、硅酸钠、羧甲基纤维素、高温沥青粉和氧化锆粉，混炼10～15分钟；最后加入0mm＜粒度≤1mm的中档镁砂细粉和200目的中档镁砂细粉，混炼10～15分钟；出料；
4)RH喷补料成品理化指标：MgO≥95；SiO2+Al2O3≤1.0；1500℃×3h条件下，抗折强度≥7.0MPa，耐压强度≥30MPa，重烧镁砂＜1％；110℃×8h条件下，抗折强度≥2.5MPa，耐压强度≥10MPa；体积密度≥2.8g/cm3；显气孔率≤20％；附着率≥95％。
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| CN107382339A (zh) * | 2017-07-18 | 2017-11-24 | 海城市中兴镁质合成材料有限公司 | 一种添加氮化钛的钢包喷补料及制备方法 |
| CN107805055A (zh) * | 2017-11-22 | 2018-03-16 | 海城利尔麦格西塔材料有限公司 | 一种添加硼化钙的钢包喷补料及其制备方法 |
| CN108341676A (zh) * | 2018-03-12 | 2018-07-31 | 常州达奥新材料科技有限公司 | 一种耐高温抗侵蚀喷补料的制备方法 |
| CN109553398A (zh) * | 2018-12-28 | 2019-04-02 | 海城利尔麦格西塔材料有限公司 | 一种高寿命电炉热修补料及制备方法 |
| CN110668799A (zh) * | 2019-10-28 | 2020-01-10 | 武汉钢铁有限公司 | 一种rh精炼炉喷补料 |
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