CN114133170B - 一种矿坑回填材料、制备方法及其应用 - Google Patents
一种矿坑回填材料、制备方法及其应用 Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002910 solid waste Substances 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 30
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- 239000004568 cement Substances 0.000 claims abstract description 20
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims abstract description 20
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 19
- 238000001354 calcination Methods 0.000 claims abstract description 19
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 19
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 19
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 17
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000036571 hydration Effects 0.000 claims abstract description 13
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- 230000033558 biomineral tissue development Effects 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
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- 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
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
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- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
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- C04B22/06—Oxides, Hydroxides
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- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/20—Sulfonated aromatic compounds
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- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- E21—EARTH OR ROCK DRILLING; MINING
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- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
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Abstract
本发明公开了一种矿坑回填材料、制备方法及其应用,所述矿坑回填材料,由以下重量份的原料组成:工业固废25‑30份,水170‑210份,十二烷基苯磺酸钠1‑3份,聚乙烯醇1‑5份和水泥8‑12份。所述制备方法包括:S1、工业固废进行粉化处理;S2、将步骤S1得到的原材料与部分水进行水合煅烧;S3、将步骤S2得到的样品与十二烷基苯磺酸钠、聚乙烯醇和剩余量的水搅拌,形成浆料后,注入二氧化碳进行矿化;S4、将步骤S3得到的矿化样与水泥混合,即得。本发明的填料可用于煤矿坑的回填,减少了回填成本,同时,具有减少二氧化碳排放和解决工业废弃物排放问题的双重优点。
Description
技术领域
本发明涉及工业固体废弃物处理技术领域,具体涉及一种矿坑回填材料、制备方法及其应用。
背景技术
随着全球工业化进程,化石燃料的过度使用导致大量温室气体排放,如二氧化碳、甲烷等。其中,增加大气中CO2浓度对全球变暖的影响最大,带来了很多极端天气和环境灾害,如洪水,干旱,海平面上升等。为实现二氧化碳减排,人们正在开发新能源利用包括太阳能、风能和氢能在内的能源来替代化石能源,但短期内仍难以实现。因此CO2捕获、封存是目前碳减排的主要路径。
CO2矿化(碳酸化)是模拟岩石加速自然风化的过程,CO2通过和钙、镁等反应生成碳酸钙、碳酸镁实现永久封存。工业高炉矿渣、电石渣、废石膏、粉煤灰等固体废物均可用于CO2矿化封存。上述工业固体废物每年排放量较大,如电石渣、废石膏和粉煤灰分别约为26Mt、220Mt和1000Mt,分布广泛,难以处理且存在污染当地水源等问题,是目前工业生产中的又一难题。
地下煤矿开采完后,留下很大的矿坑,易引发坍塌、水土流失等自然灾害,对当地生态环境和人类社会生活造成不良影响。
寻求有效的技术手段解决上述环境问题具有十分重要的意义。
发明内容
本发明的目的在于提供一种矿坑回填材料及其制备方法,该矿坑回填材料以碱性固体废弃物为原料,利用固体废气物碳酸化反应后的产物与水泥混合制备而成,可用于煤矿坑的回填,减少了回填成本,同时,本发明具有减少二氧化碳排放和解决工业废弃物排放问题的双重优点。
为了实现上述目的,本发明采用以下技术方案:
一种矿坑回填材料,由以下重量份的原料组成:
工业固废25-30份,水170-210份,十二烷基苯磺酸钠1-3份,聚乙烯醇1-5份和水泥8-12份。
优选地,所述回填材料,由以下重量份的原料组成:
工业固废26-29份,水165-205份,十二烷基苯磺酸钠1.8-2.8份,聚乙烯醇1.5-4.5份和水泥8.5-11份。
优选地,所述工业固废为工业高炉矿渣、电石渣、废石膏和粉煤灰中的至少一种。
本发明还提供了上述矿坑回填材料的制备方法,包括以下步骤:
S1、工业固废进行粉化处理,得到原材料;
S2、将步骤S1得到的原材料与部分水进行水合煅烧,得到样品;
S3、将步骤S2得到的样品与十二烷基苯磺酸钠、聚乙烯醇和剩余量的水搅拌,形成浆料后,注入二氧化碳进行矿化,得到矿化样;
S4、将步骤S3得到的矿化样与水泥混合,得到所述矿坑回填材料。
优选地,步骤S1中所述原材料的粒径为20-400微米。
优选地,步骤S2中所述水合煅烧的处理条件为:25-50℃搅拌2-5h,干燥处理,400-800℃煅烧1-3h。
优选地,步骤S3中所述矿化的条件为:30-100%CO2注入,矿化反应5-10h。
本发明还提供了上述矿坑回填材料或制备方法在碳减排中的应用。
本发明还提供了上述矿坑回填材料或制备方法在工业固废处理中的应用。
本发明还提供了上述矿坑回填材料在矿坑回填修复中的应用。
本发明的有益效果为:
本发明通过粉化、水合煅烧等预处理,加入十二烷基苯磺酸钠,聚乙烯醇提升固废中钙、镁等离子的提取率,进而提升了二氧化碳矿化效率,矿化后样品与水泥反应形成稳固的回填材料,可用于矿坑回填。相比现有技术,本发明的回填成本低,且具有减少二氧化碳排放和解决工业废弃物排放问题的双重优点。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面对本发明的技术方案做进一步详述。
当实施例给出数值范围时,应理解,除非本发明另有说明,每个数值范围的两个端点以及两个端点之间任何一个数值均可选用。除非另外定义,本文中使用的所有技术和科学术语具有与本发明所属技术领域的普通技术人员通常理解的相同意义。
本发明对原料的来源没有特殊限制,如无特殊说明,本发明所采用的原料均为普通市售产品。所述工业固废为碱性工业废气物,具体为工业高炉矿渣、电石渣、废石膏和粉煤灰中的至少一种,实施例中的工业固废为电石渣;实施例中二氧化碳的浓度为体积百分数。
实施例1一种矿坑回填材料及制备方法
一种矿坑回填材料,由以下重量份的原料组成:
工业固废25份,水170份,十二烷基苯磺酸钠1份,聚乙烯醇1份和水泥8份。
所述矿坑回填材料的制备方法,包括以下步骤:
S1、工业固废进行粉化处理,得到粒径为20微米的原材料;
S2、将步骤S1得到的原材料与100份水进行水合煅烧,得到样品;
所述水合煅烧的处理条件为:25℃搅拌5h,干燥处理,400℃煅烧3h;
S3、将步骤S2得到的样品与十二烷基苯磺酸钠、聚乙烯醇和剩余量的水搅拌,形成浆料后,注入30%二氧化碳,矿化反应10h,得到矿化样;
S4、将步骤S3得到的矿化样与水泥混合,得到所述矿坑回填材料。
实施例2一种矿坑回填材料及制备方法
一种矿坑回填材料,由以下重量份的原料组成:
工业固废30份,水210份,十二烷基苯磺酸钠3份,聚乙烯醇5份和水泥12份。
所述矿坑回填材料的制备方法,包括以下步骤:
S1、工业固废进行粉化处理,得到粒径为400微米的原材料;
S2、将步骤S1得到的原材料与120份水进行水合煅烧,得到样品;
所述水合煅烧的处理条件为:50℃搅拌2h,干燥处理,800℃煅烧1h;
S3、将步骤S2得到的样品与十二烷基苯磺酸钠、聚乙烯醇和剩余量的水搅拌,形成浆料后,注入100%二氧化碳,矿化反应5h,得到矿化样;
S4、将步骤S3得到的矿化样与水泥混合,得到所述矿坑回填材料。
实施例3一种矿坑回填材料及制备方法
一种矿坑回填材料,由以下重量份的原料组成:
工业固废29份,水200份,十二烷基苯磺酸钠2份,聚乙烯醇3份和水泥9份。
所述矿坑回填材料的制备方法,包括以下步骤:
S1、工业固废进行粉化处理,得到粒径为100微米的原材料;
S2、将步骤S1得到的原材料与115份水进行水合煅烧,得到样品;
所述水合煅烧的处理条件为:30℃搅拌3h,干燥处理,600℃煅烧2h;
S3、将步骤S2得到的样品与十二烷基苯磺酸钠、聚乙烯醇和剩余量的水搅拌,形成浆料后,注入80%二氧化碳,矿化反应7h,得到矿化样;
S4、将步骤S3得到的矿化样与水泥混合,得到所述矿坑回填材料。
实施例4一种矿坑回填材料及制备方法
本实施例与实施例3的区别在于:
一种矿坑回填材料,由以下重量份的原料组成:
工业固废26份,水165份,十二烷基苯磺酸钠1.8份,聚乙烯醇1.5份和水泥8.5份。
实施例5一种矿坑回填材料及制备方法
本实施例与实施例3的区别在于:
一种矿坑回填材料,由以下重量份的原料组成:
工业固废28份,水205份,十二烷基苯磺酸钠2.8份,聚乙烯醇4.5份和水泥11份。
对比例1一种矿坑回填材料及制备方法
本对比例与实施例3的区别在于,采用腐植酸钠代替十二烷基苯磺酸钠;
制备方法中,煅烧温度为850℃;矿化的条件为:20%CO2注入,矿化反应16h。
对比例2一种矿坑回填材料及制备方法
本对比例与实施例3的区别在于,所述矿坑回填材料,由以下重量份的原料组成:
工业固废29份,水200份,十二烷基苯磺酸钠3份,聚乙烯醇1份和水泥10份。
一、工业固废固碳率
按照热重分析方法,测定工业固废的固碳率,分别测定固废原料和矿化后固相产物所对应的CO2失重率,工业固废的固碳率可以根据公式进行计算:
式中,ηCO2为固废的二氧化碳吸收率,%;
mCO2为被矿化固定在固废中的CO2的质量,g;
mrm为原料的质量,g;
w2为吸收二氧化碳反应后对应的CO2失重率,%;
w1为固废原料中对应的CO2失重率,%。
性能测试结果如表1所示。
表1
二、矿坑回填料性能检测
根据抗压强度测试方法,对本发明实施例1-5和对比例1-2制备的矿坑回填料进行性能检测,结果如表2所示。
表2
综上所述,本发明通过粉化、水合煅烧等预处理,加入十二烷基苯磺酸钠,聚乙烯醇提升固废中钙、镁等离子的提取率,进而提升了二氧化碳矿化效率,矿化后样品与水泥反应形成稳固的回填材料,可用于矿坑回填。相比现有技术,本发明的回填成本低,且具有减少二氧化碳排放和解决工业废弃物排放问题的双重优点。
以上是结合具体实施例对本发明进一步的描述,但这些实施例仅仅是范例性的,并不对本发明的范围构成任何限制。本领域技术人员应该理解的是,在不偏离本发明的精神和范围下可以对本发明技术方案的细节和形式进行修改或替换,但这些修改和替换均落入本发明的保护范围内。
Claims (10)
1.一种矿坑回填材料,其特征在于,由以下重量份的原料组成:
工业固废25-30份,水170-210份,十二烷基苯磺酸钠1-3份,聚乙烯醇1-5份和水泥8-12份。
2.一种矿坑回填材料,其特征在于,由以下重量份的原料组成:
工业固废26-29份,水165-205份,十二烷基苯磺酸钠1.8-2.8份,聚乙烯醇1.5-4.5份和水泥8.5-11份。
3.根据权利要求1或2所述的矿坑回填材料,其特征在于,所述工业固废为工业高炉矿渣、电石渣、废石膏和粉煤灰中的至少一种。
4.根据权利要求1或2所述的矿坑回填材料的制备方法,其特征在于,包括以下步骤:
S1、工业固废进行粉化处理,得到原材料;
S2、将步骤S1得到的原材料与部分水进行水合煅烧,得到样品;
S3、将步骤S2得到的样品与十二烷基苯磺酸钠、聚乙烯醇和剩余量的水搅拌,形成浆料后,注入二氧化碳进行矿化,得到矿化样;
S4、将步骤S3得到的矿化样与水泥混合,得到所述矿坑回填材料。
5.根据权利要求4所述的制备方法,其特征在于,步骤S1中所述原材料的粒径为20-400微米。
6.根据权利要求4所述的制备方法,其特征在于,步骤S2中所述水合煅烧的处理条件为:25-50℃搅拌2-5h,干燥处理,400-800℃煅烧1-3h。
7.根据权利要求4所述的制备方法,其特征在于,步骤S3中所述矿化的条件为:30-100%CO2注入,矿化反应5-10h。
8.根据权利要求1或2所述的矿坑回填材料在碳减排中的应用。
9.根据权利要求1或2所述的矿坑回填材料在矿坑回填修复中的应用。
10.根据权利要求1或2所述的矿坑回填材料在工业固废处理中的应用。
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