CN102060493A - 一种利用生活垃圾焚烧炉渣制备炉渣免烧墙体砖的方法 - Google Patents
一种利用生活垃圾焚烧炉渣制备炉渣免烧墙体砖的方法 Download PDFInfo
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- CN102060493A CN102060493A CN2010105391770A CN201010539177A CN102060493A CN 102060493 A CN102060493 A CN 102060493A CN 2010105391770 A CN2010105391770 A CN 2010105391770A CN 201010539177 A CN201010539177 A CN 201010539177A CN 102060493 A CN102060493 A CN 102060493A
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- slag
- unburned
- brick
- waste incineration
- incineration residue
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- 239000002893 slag Substances 0.000 title claims abstract description 92
- 239000011449 brick Substances 0.000 title claims abstract description 51
- 239000010813 municipal solid waste Substances 0.000 title abstract description 23
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- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 19
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- 239000010791 domestic waste Substances 0.000 claims description 33
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 238000000748 compression moulding Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound 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[Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
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- 239000012535 impurity Substances 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N Sodium silicate Chemical group 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[Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- XGZRAKBCYZIBKP-UHFFFAOYSA-L disodium;dihydroxide Chemical compound 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[OH-].[OH-].[Na+].[Na+] XGZRAKBCYZIBKP-UHFFFAOYSA-L 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound 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[Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N Sulfur trioxide Chemical compound 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O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 11
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 24
- 239000010959 steel Substances 0.000 description 24
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- 238000002360 preparation method Methods 0.000 description 16
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- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B28/14—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 containing calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
本发明公开了一种利用生活垃圾焚烧炉渣制备炉渣免烧墙体砖的方法,包括如下步骤,原料配比为:生活垃圾焚烧炉渣37.9%~70.2%、石灰4.7%~19.0%、水泥4.7%~23.7%、石膏7.6%~19.0%和激发剂2.5%~5.2%;其中所述激发剂配成水溶液后再与原料中的其他组分混合,使原料含水量为8%~12%;再经压制成型、养护即制得炉渣免烧墙体砖。本发明方法既可以解决目前城市生活垃圾焚烧炉渣的处置问题,实现废渣资源化利用,又可以削减城市生活垃圾焚烧炉渣的排放,减少城市生活垃圾焚烧炉渣因堆积、填埋而造成的环境污染;具有炉渣废料资源化利用率高、工艺简单、操作方便、运行成本低等优点。
Description
一种利用生活垃圾焚烧炉渣制备炉渣免烧墙体砖的方法
技术领域
[0001] 本发明属于无机材料、固体废物资源化综合利用领域,具体是指一种高效资源化 利用生活垃圾焚烧炉渣(简称炉渣)制备炉渣免烧墙体砖的方法。
背景技术
[0002] 长期以来,我国城市垃圾处理主要以寻找合适地点加以消纳为目的,无害化处理 率极低。近年来,由于城市可用填埋场地越来越少和填埋成本的提高,以及堆肥因市场原因 受到规模限制且堆肥质量不太理想等原因,焚烧法已提到议事日程。
[0003] 随着生活垃圾焚烧量逐年增加,将产生大量的固体废弃物——焚烧炉渣。焚烧炉 渣是城市生活垃圾焚烧发电厂的副产品,生活垃圾焚烧炉渣一般包括炉排上残留的焚烧残 渣和从炉排间掉落的细灰。焚烧炉渣主要由碱金属及碱土金属构成,在焚烧过程中会集微 量的Cd、Hg、Pd、As、Cr、Se、Zn等重金属和氯离子。如不加以处理,上述重金属在酸性条 件下如酸雨,溶出速度较快且溶出量较大,往往会超出我国重金属浸出毒性GB5085. 3-1996 的标准,对环境造成危害。随着生活垃圾焚烧发电厂建设速度的加快,焚烧炉渣产生量越来 越大。
[0004] 如何化害为利,变废为宝,化废料为资源,扩宽焚烧炉渣的资源化利用途径,已成 为城市生活垃圾焚烧发电厂和环保部门共同关注的问题。
[0005] 目前国际上焚烧炉渣的资源化利用途径主要有:①石油浙青路面的替代骨料;② 水泥或混凝土的替代骨料;③填埋场覆盖材料;④路提、路基等的填充材料等。如果考虑其 利用位置,主要是被用作陆地水泥基及浙青基工程(如道路、停车场等)和海洋建筑工程 (如人工暗礁、护岸等)。由于焚烧炉渣要经过预处理导致成本升高,质量下降,因此未大量 推广应用。
[0006] 截止目前国内已有四篇关于利用城市生活垃圾焚烧炉渣的专利:
[0007] 专利申请号为200410066443. 7的中国专利公开了一种生活垃圾焚烧炉渣集料的 生产工艺,该方法尤指将该炉渣经再生处理为建筑用集料的生产工艺,包括如下步骤:进 料、磁选去铁、筛分、风选、破碎、消解、涡电流分选等,生产过程复杂,可操作性差,不利于实 现产业化。
[0008] 申请号为200410016076. X的中国发明专利公开了一种生活垃圾焚烧炉渣制作土 建工程结构层的方法。该方法先以磁选方式分离黑色金属,然后作粒径分选,小于19mm粒 径的筛下物即可作为集料用于市政道路的路基层或替代土源作为生活垃圾填埋场覆盖材 料;最后将筛下物摊铺制作成市政道路路基层或生活垃圾填埋场覆盖结构层,洒水后进行 压实。炉渣回收率较高,但是其中的重金属会给地表水、地下水及周边的环境带来隐患,极 有可能造成二次污染。
[0009] 申请号为200510120665. 7的中国发明专利公开了一种利用生活垃圾焚烧炉渣 生产砌筑水泥的方法。应用该方法生产的砌筑水泥的物理性能均可达到砌筑水泥GB/ T3183-2003标准,但是生活垃圾焚烧炉渣的用量不高,约为15%。[0010] 申请号为200810199156. 1的中国发明专利公开了一种利用生活垃圾焚烧炉渣生 产硅酸盐水泥熟料的方法。该方法在现有新型干法水泥窑炉的基础上对其进行改进,用炉 渣替代部分粘土和石灰石来生产硅酸盐水泥熟料,但是炉渣带入生料中的有害组分(碱、 氯等)经过处理后无法避免的仍然会对熟料造成一定的影响。
发明内容
[0011] 本发明的目的就是为了解决上述现有技术中存在的不足,提供一种环保、方便、实 用的利用生活垃圾焚烧炉渣制备炉渣免烧墙体砖的方法,是将生活垃圾焚烧炉渣代替砂, 作为集料,将炉渣进行球磨后与石灰、石膏、水泥和激发剂的水溶液混合搅拌均勻后制成 的,该方法可以廉价处理城市生活垃圾焚烧炉渣,制备的炉渣免烧墙体砖的强度满足《混凝 土普通砖和装饰砖》(NY/T671-200;3)标准强度等级MU15技术要求。生活垃圾焚烧炉渣利 用率高达70%,利用焚烧炉渣制炉渣免烧墙体砖,吃渣量大,工艺简单,产品成本低。炉渣免 烧墙体砖重金属浸出量不超标,且对环境的安全性研究合格。
[0012] 本发明的目的通过如下技术方案实现:
[0013] 一种利用生活垃圾焚烧炉渣制备炉渣免烧墙体砖的方法,包括如下步骤:
[0014] (1)以质量百分比计,将原料按如下配比混合,加水搅拌;
[0015] 生活垃圾焚烧炉渣 37. 9 %〜70. 2 %
[0016]石灰 4. 7%〜19.0%
[0017]水泥 4. 7%〜23. 7%
[0018]石膏 7. 6%〜19.0%
[0019]激发剂 2. 5%〜5. 2%;
[0020] 其中所述激发剂配成水溶液后再与原料中的其他组分混合,以质量百分比计,使 原料含水量为8%〜12% ;—般以握能成团,松手轻触能散开为宜;
[0021] (2)经压制成型,即利用液压机采用双面加压的方式进行压制,成型压力在20〜 30Mpa ;然后通过洒水养护即可制得炉渣免烧墙体砖。
[0022] 步骤(1)中所述所述生活垃圾焚烧炉渣还经过如下预处理:将焚烧炉渣经球磨处 理,然后分别过0. 15cm、0. 3cm、0. 6cm、l. 18cm目的筛,筛分后的炉渣,以质量百分比计,按 照粒径0. 15cm以下的占30〜50%、0. 15cm〜0. 3cm的占25〜;35%、0. 6〜1. 18cm的占 25〜35%的比例混合,取用混合后的炉渣。
[0023] 步骤(1)中所述生活垃圾焚烧炉渣在进行球磨处理前还进行除杂的预处理:对生 活垃圾焚烧炉渣进行干燥和除臭,再将其过3cm筛,取用3cm以下的生活垃圾焚烧炉渣作为 原料。
[0024] 步骤(1)中所述球磨是干法球磨,球磨时间为2〜5分钟。
[0025] 步骤(1)中所述激发剂(用来激发生活垃圾焚烧炉渣的活性)为硅酸钠、硫酸钠 或氢氧化钠。
[0026] 生活垃圾焚烧炉渣主要是不可燃的无机物以及部分未燃尽的可燃有机物,来源于 垃圾中的玻璃、装修杂物、瓶子、陶瓷、砖块、熔渣等,还含有一定的塑料、金属物质和未完全 燃烧的纸类、纤维、木头等有机物。生产中,根据实际情况,如果生活垃圾焚烧炉渣存在较大 的臭味以及残余的玻璃、装修杂物、瓶子、陶瓷、砖块、塑料、金属物质和未完全燃烧的纸类、纤维、木头等,该炉渣在球磨前还包括干燥、除臭和过筛除杂的预处理,其中,干燥和除臭是 同时进行的,炉渣的干燥可以通过将其平铺晾晒获得,而臭味会伴随着炉渣的干燥大大减 少;该预处理的过筛除杂为过3cm筛,将玻璃、装修杂物、瓶子、陶瓷、砖块、塑料、金属物质 和未完全燃烧的纸类、纤维、木头等去除,取用3cm以下的炉渣。有些原料需经过上述全部 流程,而有些则可能只需1〜2道流程,然后进行球磨、筛分,各种原材料分别储存入库,按 照配方要求计量。
[0027] 根据行业要求,所述水泥的质量符合国家标准《硅酸盐水泥、普通硅酸盐水 泥》(GB175-1999)、《矿渣硅酸盐水泥、火山灰质硅酸盐水泥及粉煤灰硅酸盐水泥》 (GB1344-19^)、《复合硅酸盐水泥》(GB12958-1999)的要求。
[0028] 所述石膏符合GB/TM83-1996标准的要求,石膏的CaO大于32%,SO3大于45%, 含水量小于20%,其他杂质小于3%。
[0029] 所述石灰选用刚出厂的新鲜生石灰,确保其高活性,有效氧化钙含量不低于70%, 过火灰低于5 %,欠火灰少于7%,细磨通过0. 08mm筛。
[0030] 所生产的炉渣免烧墙体砖,性能达到《混凝土普通砖和装饰砖》(NY/T671-2003)标 准要求;制品的重金属溶出按照GB5085. 3-1996规定的方法检测达到GB3838-2002地表水 ν类环境质量标准要求,参见实施例给出的实验数据。适当调节炉渣的颗粒级配或水泥、石 灰、石膏或激发剂掺量,可生产更高等级的砖。
[0031] 本发明的原理:利用激发剂调节生活垃圾焚烧炉渣的酸碱度,腐蚀其表面,增强物 料之间的附着力,激发炉渣的活性,并与水泥等的水化产物共同将有害重金属固化,使生产 的砖能达到国家标准要求;还使砖的重金属浸出量不会超标,且对环境的安全性研究合格。
[0032] 本发明与现有技术相比,具有如下优点和有益效果:
[0033] 1、本发明废料利用率高,对城市生活垃圾焚烧炉渣利用率可高达70%,而城市生 活垃圾焚烧炉渣占所焚烧生活垃圾量的20%,不仅大大降低产品的原料资源成本,而且变 废为宝,为城市生活垃圾焚烧炉渣开辟一种新的资源化高效再利用方法,减少了城市生活 垃圾焚烧炉渣所带来的环境污染。
[0034] 2、本发明充分利用生活垃圾焚烧炉渣具有的潜在活性可被激发剂激发的机理,解 决了生活垃圾焚烧炉渣在资源化再利用过程中由于自身的惰性而导致的技术难题,为生活 垃圾焚烧炉渣的再利用提供一种新的技术途径。
[0035] 3、本发明制备的生活垃圾焚烧炉渣免烧墙体砖强度高,符合《混凝土普通砖和装 饰砖》(NY/T671-200¾标准,且安全性评价合格。
[0036] 4、本发明技术灵活性强、工艺简单,成本低,操作易于控制。
附图说明
[0037] 图1是本发明的工艺流程图。 具体实施方式
[0038] 下面结合实施例及附图对本发明做进一步地详细说明,但本发明实施方式不限于 此。
[0039] 实施例1 (工艺流程如图1所示)[0040] (1)原料处理:首先对广州市李坑生活垃圾焚烧发电厂的生活垃圾焚烧炉渣进行 干燥、除臭和过3cm筛除杂的预处理,然后进行球磨。球磨是干法球磨,球磨时间为2〜5分 钟,球磨后对炉渣进行筛分,分别过0. 15cm、0. 3cm、0. 6cm、1. 18cm筛,按照粒径0〜0. 15cm 占40% (质量)、0· 15cm〜0. 3cm占30% (质量)、0· 6〜1. 18cm占30% (质量)的比例, 将炉渣进行混合。
[0041] (2)粉料制备:使用双卧轴搅拌机按表1配方先将炉渣70. ^g、石灰14. ^g、石膏 7. 8kg和水泥4. 9kg加入搅拌槽,再将激发剂Na2Si032. 5kg与IOkg的水混合,配成Na2SiO3 水溶液后加入搅拌槽搅拌,使混合料均勻,使含水量约为9. 1% (质量),一般以握能成团, 松手轻触能散开为宜。
[0042] (3)压制成型:利用液压机采用双面加压的方式进行压制,成型压力为20MPa。
[0043] (4)自然养护:砖坯成型后当有一定强度(浇水时砖淋不坏)就可以洒水养护。隔 3小时洒水1次,5天后每隔5小时1次,10天后每隔10小时1次,15天后自然干燥至28 天,得到炉渣免烧墙体砖。
[0044] 经测定,生活垃圾焚烧炉渣免烧墙体砖的物理性能如表2所示,重金属浸出毒性 如表9所示。
[0045] 实施例2
[0046] 本实施例与实施例1的不同之处在于:
[0047] (2)粉料制备:使用双卧轴搅拌机按表1配方先将炉渣69. 3kg、石灰14. 4kg、石膏 7. 7kg和水泥4. 8kg加入搅拌槽,再将激发剂Na2Si033. 8kg与9kg的水混合,配成Na2SiO3水 溶液后加入搅拌槽搅拌,使混合料均勻,使含水量约为8. 2% (质量),一般以握能成团,松 手轻触能散开为宜。
[0048] 原料处理、压制成型、自然养护与实施例1相同,经测定,制得的炉渣免烧墙体砖 的物理性能如表2所示。
[0049] 实施例3
[0050] 本实施例与实施例1的不同之处在于:
[0051] (2)粉料制备:使用双卧轴搅拌机按表1配方先将炉渣68. 3kg、石灰14. ^g、石膏 7. 6kg和水泥4. 7kg加入搅拌槽,再将激发剂Na2Si035. 2kg与12kg的水混合,配成Na2SiO3 水溶液后加入搅拌槽搅拌,使混合料均勻,使含水量约为11% (质量),一般以握能成团,松 手轻触能散开为宜。
[0052] 原料处理、压制成型、自然养护与实施例1相同,经测定,制得的炉渣免烧墙体砖 的物理性能如表2所示。
[0053] 实施例4
[0054] 本实施例与实施例1的不同之处在于:
[0055] 球磨后对炉渣进行筛分,分别过0. 15cm、0. 3cm、0. 6cm、1. 18cm筛,按照粒径0〜 0. 15cm 占 30% (质量)、0. 15cm 〜0. 3cm 占(质量)、0· 6 〜1. 18cm 占(质量) 的比例,将炉渣进行混合。
[0056] 粉料制备、压制成型、自然养护与实施例1相同,经测定,制得的炉渣免烧墙体砖 的物理性能如表2所示。
[0057] 实施例5[0058] 本实施例与实施例1的不同之处在于:
[0059] 球磨后对炉渣进行筛分,分别过0. 15cm、0. 3cm、0. 6cm、1. 18cm筛,按照粒径0〜 0. 15cm 占 50% (质量)、0. 15cm 〜0. 3cm 占 25% (质量)、0· 6 〜1. 18cm 占 25% (质量) 的比例,将炉渣进行混合。
[0060] 粉料制备、压制成型、自然养护与实施例1相同,经测定,制得的炉渣免烧墙体砖 的物理性能如表2所示。
[0061] 表1 A系列样品配方(单位kg)
[0062]
样品编号 炉渣 [0063] 表2 A系列样品的物理性能
[0064]
[0065] 实施例6
[0066] (1)原料处理:首先对广州市李坑生活垃圾焚烧发电厂的炉渣进行干燥、除臭和 过3cm目的筛除杂的预处理,然后进行球磨。球磨是干法球磨,球磨时间为2〜5分钟,球磨 后对炉渣进行筛分,分别过0. 15cm、0. 3cm、0. 6cm、1. 18cm筛,按照粒径0〜0. 15cm占40%、 0. 15cm〜0. 3cm占30%、0. 6〜1. 18cm占30%的比例,将炉■进行混合。
[0067] (2)粉料制备:使用双卧轴搅拌机按表3配方先将炉渣70. ^g、石灰14. ^g、石膏 7. 8kg和水泥4. 9kg加入搅拌槽,再将激发剂Na2Si042. 5kg与IOkg的水混合,配成Na2SiO4水溶液后加入搅拌槽搅拌,使混合料均勻,使含水量约为9. 1% (质量),一般以握能成团, 松手轻触能散开为宜。
[0068] (3)压制成型:利用液压机采用双面加压的方式进行压制,成型压力为20MPa。
[0069] (4)自然养护:砖坯成型后当有一定强度(浇水时砖淋不坏)就可以洒水养护。隔 3小时洒水1次,7天后每隔8小时1次,10天后每隔10小时1次,15天后自然干燥至28 天,得到炉渣免烧墙体砖。
[0070] 经测定,炉渣免烧墙体砖的物理性能如表4所示,重金属浸出毒性如表9所示。
[0071] 实施例7
[0072] 本实施例与实施例6的不同之处在于:
[0073] (2)粉料制备:使用双卧轴搅拌机按表3配方先将炉渣69. 3kg、石灰14. 4kg、石膏 7. 7kg和水泥4. 8kg加入搅拌槽,再将激发剂Na2Si043. 8kg与13kg的水混合,配成Na2SiO4 水溶液后加入搅拌槽搅拌,使混合料均勻,使含水量约为12% (质量),一般以握能成团,松 手轻触能散开为宜。
[0074] 原料处理、压制成型、自然养护与实施例6相同,经测定,炉渣免烧墙体砖的物理 性能如表4所示。
[0075] 实施例8
[0076] 本实施例与实施例6的不同之处在于:
[0077] (2)粉料制备:使用双卧轴搅拌机按表3配方先将炉渣68. 3kg、石灰14. ^g、石膏 7. 6kg和水泥4. 7kg加入搅拌槽,再将激发剂Na2Si045. 2kg与Ilkg的水混合,配成Na2SiO4 水溶液后加入搅拌槽搅拌,使混合料均勻,使含水量约为8. 2% (质量),一般以握能成团, 松手轻触能散开为宜。
[0078] 原料处理、压制成型、自然养护与实施例6相同,经测定,炉渣免烧墙体砖的物理 性能如表4所示。
[0079] 表3 B系列样品配方(单位kg)
[0080]
[0081 ] 表4 B系列样品的物理性能
[0083] 实施例9 (工艺流程如图1所示)
[0084] (1)原料处理:首先对广州市李坑生活垃圾焚烧发电厂的炉渣进行干燥、除臭和 过3cm目的筛除杂的预处理,然后进行球磨。球磨是干法球磨,球磨时间为2〜5分钟,球磨 后对炉渣进行筛分,分别过0. 15cm、0. 3cm、0. 6cm、1. 18cm筛,按照粒径0〜0. 15cm占40%、 0. 15cm〜0. 3cm占30%、0. 6〜1. 18cm占30%的比例,将炉■进行混合。
[0085] (2)粉料制备:使用双卧轴搅拌机按表5配方先将炉渣70. ^g、石灰14. ^g、石膏 7. 8kg和水泥4. 9kg加入搅拌槽,再将激发剂NaOH 2. 5kg与IOkg的水混合,配成NaOH水溶 液后加入搅拌槽搅拌,使混合料均勻,使含水量约为9. 1% (质量),一般以握能成团,松手 轻触能散开为宜。
[0086] (3)压制成型:利用液压机采用双面加压的方式进行压制,成型压力为20MPa。
[0087] (4)自然养护:砖坯成型后当有一定强度(浇水时砖淋不坏)就可以洒水养护。隔 8小时洒水1次,7天后每隔12小时1次,15天后自然干燥至观天得到炉渣免烧墙体砖。
[0088] 经测定,炉渣免烧墙体砖的物理性能如表6所示,重金属浸出毒性如表9所示。
[0089] 实施例10
[0090] 本实施例与实施例9的不同之处在于:
[0091] (2)粉料制备:使用双卧轴搅拌机按表5配方先将炉渣69. 3kg、石灰14. 4kg、石膏 7. 7kg和水泥4. 8kg加入搅拌槽,再将激发剂NaOH 3. 8kg与IOkg的水混合,配成NaOH水溶 液后加入搅拌槽搅拌,使混合料均勻,使含水量约为9. 1% (质量),一般以握能成团,松手 轻触能散开为宜。
[0092] 原料处理、压制成型、自然养护与实施例9相同,经测定,炉渣免烧墙体砖的物理 性能如表6所示。
[0093] 实施例11
[0094] 本实施例与实施例9的不同之处在于:
[0095] (2)粉料制备:使用双卧轴搅拌机按表5配方先将炉渣68. 3kg、石灰14. ^g、石膏 7. 6kg和水泥4. 7kg加入搅拌槽,再将激发剂NaOH 5. 2kg与IOkg的水混合,配成NaOH水溶 液后加入搅拌槽搅拌,使混合料均勻,使含水量约为9. 1% (质量),一般以握能成团,松手 轻触能散开为宜。
[0096] 原料处理、压制成型、自然养护与实施例9相同,经测定,炉渣免烧墙体砖的物理 性能如表6所示。
[0097] 表5 C系列样品配方(单位kg)[0098]
[0099] 表6 C系列样品的物理性能
[0100]
[0101] 实施例12 (工艺流程如图1所示)
[0102] (1)原料处理:首先对广州市李坑生活垃圾焚烧发电厂的炉渣进行干燥、除臭和 过3cm目的筛除杂的预处理,然后进行球磨。球磨是干法球磨,球磨时间为2〜5分钟,球磨 后对炉渣进行筛分,分别过0. 15cm、0. 3cm、0. 6cm、1. 18cm筛,按照粒径0〜0. 15cm占40%、 0. 15cm〜0. 3cm占30%、0. 6〜1. 18cm占30%的比例,将炉渣进行混合。
[0103] (2)粉料制备:使用双卧轴搅拌机按表7配方先将炉渣37. ^g、石灰19. 0kg、石膏 14. 2kg和水泥23. 7kg加入搅拌槽,再将激发剂Na2Si035. 2kg与IOkg的水混合,配成Na2SiO3 水溶液后加入搅拌槽搅拌,使混合料均勻使含水量约为9. 1% (质量),一般以握能成团,松 手轻触能散开为宜。
[0104] (3)压制成型:利用液压机采用双面加压的方式进行压制,成型压力为20MPa。
[0105] (4)自然养护:砖坯成型后当有一定强度(浇水时砖淋不坏)就可以洒水养护。隔 3小时洒水1次,5天后每隔5小时1次,10天后每隔10小时1次,15天后自然干燥至28 天,得到炉渣免烧墙体砖。经测定,炉渣免烧墙体砖的物理性能如表8所示。
[0106] 实施例13
[0107] 本实施例与实施例12的不同之处在于:
[0108] (2)粉料制备:使用双卧轴搅拌机按表7配方先将炉渣52. 1kg、石灰4. Ag、石膏 19. Okg和水泥19. Okg加入搅拌槽,再将激发剂Na2Si035. 2kg与IOkg的水混合,配成Na2SiO3 水溶液后加入搅拌槽搅拌,使混合料均勻,使含水量约为9. 1% (质量),一般以握能成团, 松手轻触能散开为宜。
[0109] 原料处理、压制成型、自然养护与实施例12相同,经测定,炉渣免烧墙体砖的物理 性能如表8所示,重金属浸出毒性如表9所示。[0110] 实施例14
[0111] 本实施例与实施例12的不同之处在于:
[0112] (2)粉料制备:使用双卧轴搅拌机按表7配方先将炉渣66. 4kg、石灰11. 4kg、石膏 8. 3kg和水泥8. 7kg加入搅拌槽,再将激发剂Na2Si035. 2kg与IOkg的水混合,配成Na2SiO3 水溶液后加入搅拌槽搅拌,使混合料均勻,使含水量约为9. 1% (质量),一般以握能成团, 松手轻触能散开为宜。
[0113] 原料处理、压制成型、自然养护与实施例12相同,经测定,炉渣免烧墙体砖的物理 性能如表8所示,重金属浸出毒性如表9所示。
[0114] 表7 D系列样品配方(单位kg)
[0116] 表8 D系列样品的物理性能
[0117]
[0118] 表9部分代表性样品重金属溶出情况(yg/L)
[0119]
Claims (9)
1. 一种利用生活垃圾焚烧炉渣制备炉渣免烧墙体砖的方法,其特征在于包括如下步骤:(1)以质量百分比计,将原料按如下配比混合,加水搅拌; 生活垃圾焚烧炉渣 37. 9 %〜70. 2 %;石灰 4. 7%〜19. 0%水泥 4. Ί%〜23. 7% 石膏 7. 6%〜19. 0% 激发剂2. 5%〜5. 2% ;其中所述激发剂配成水溶液后再与原料中的其他组分混合,以质量百分比计,使原料 含水量为8%〜12% ;(2)经压制成型、养护即制得炉渣免烧墙体砖。
2.根据权利要求1所述的方法,其特征在于,步骤(1)中,所述生活垃圾焚烧炉渣还经 过如下预处理:将焚烧炉渣经球磨处理,然后筛分,筛分后的炉渣,以质量百分比计,按照粒 径0. 15cm以下的占30〜50%、0. 15cm〜0. 3cm的占25〜、0. 6〜1. 18cm的占25〜 35%的比例混合,取用混合后的炉渣。
3.根据权利要求2所述的方法,其特征在于,所述球磨是干法球磨,球磨时间为2〜5 分钟。
4.根据权利要求2所述的方法,其特征在于,所述生活垃圾焚烧炉渣在进行球磨处理 前还经过除杂的预处理:对生活垃圾焚烧炉渣进行干燥和除臭,再将其过3cm筛,取用3cm 以下的炉渣。
5.根据权利要求1所述的方法,其特征在于,步骤(1)中,所述激发剂为硅酸钠、硫酸钠 或氢氧化钠。
6.根据权利要求1所述的方法,其特征在于,步骤(1)中,所述石灰中有效氧化钙含量 不低于70%,过火灰低于5%,欠火灰少于7%,细磨过0. 08mm筛。
7.根据权利要求1所述的方法,其特征在于,步骤(1)中,所述石膏的氧化钙大于 32 %,三氧化硫大于45 %,含水量小于20 %。
8.根据权利要求1所述的方法,其特征在于,步骤O)中,所述压制成型是利用液压机 采用双面加压的方式进行压制,成型压力在20〜30MPa。
9.根据权利要求1所述的方法,其特征在于,步骤O)中,所述养护是通过洒水自然养护。
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