CN105254166B - A kind of dewatered sludge curing agent, preparation method and application method - Google Patents
A kind of dewatered sludge curing agent, preparation method and application method Download PDFInfo
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Abstract
一种脱水污泥固化剂、制备方法与使用方法，属于环境工程技术领域，脱水污泥固化剂中磷矿石、电石渣、尾矿渣和大理石渣按质量百分比为(1～3):(1～3):(1～3):(1～3)，其制备方法包括：分别对磷矿石、电石渣、尾矿渣和大理石渣进行水洗、烘干、破碎、球磨处理后，按比例混合均匀。脱水污泥固化剂的使用方法包括：脱水污泥与添加的脱水污泥固化剂按比例搅拌均匀，实现固化。固化后的脱水污泥在常温常压覆膜养护3天后抗压强度能够达到78KPa，浸出液的pH介于5～10。本发明的脱水污泥固化剂采用固体废弃物为原料，原料来源广泛、成本低，利用固体废弃物自身化学性质和相互间的活性激发，实现了脱水污泥的固化稳定化。A dewatered sludge solidifying agent, a preparation method and a use method, belonging to the technical field of environmental engineering, the phosphate rock, carbide slag, tailings slag and marble slag in the dewatered sludge solidifying agent are (1-3) by mass percentage: (1 ～3):(1～3):(1～3), the preparation method comprises: washing, drying, crushing and ball milling the phosphate rock, calcium carbide slag, tailings slag and marble slag respectively, and mixing them in proportion uniform. The method of using the dewatered sludge solidifying agent includes: mixing the dewatered sludge and the added dewatered sludge solidifying agent in proportion to achieve solidification. The compressive strength of the cured dewatered sludge can reach 78KPa after 3 days of curing under normal temperature and pressure, and the pH of the leachate is between 5 and 10. The dewatered sludge solidifying agent of the present invention uses solid waste as a raw material, has wide sources of raw materials and low cost, and utilizes the chemical properties of the solid waste itself and the activity excitation between them to realize the solidification and stabilization of the dewatered sludge.
Description
技术领域technical field
本发明属于环境工程技术领域，特别涉及一种脱水污泥固化剂、制备方法与使用方法。The invention belongs to the technical field of environmental engineering, and in particular relates to a dewatered sludge solidifying agent, a preparation method and a use method.
背景技术Background technique
污泥是污水处理过程中产生的一种粘稠状物质，它以好氧、厌氧微生物为主体，同时也混入原污水中带有的泥砂、纤维、动植物残体及吸附在其上的有机物、金属、病菌、虫卵、胶质等多种复杂的混合体。对于大型城市的污水处理厂来说，由于有大量的工业废水排入系统，造成污水污泥中的重金属含量偏高，其中铅、砷、镉含量往往接近或超过污泥作为农用堆肥的接纳标准，从污水处理厂排出的污泥一般是一种松散的、含水量在80％～90％的胶溶状膏体物，具有比重轻、体积庞大、不易脱水、极易腐败恶臭的理化特点，因而十分不利于处理与运输。Sludge is a kind of viscous substance produced in the process of sewage treatment. It is mainly composed of aerobic and anaerobic microorganisms. A complex mixture of organic matter, metals, germs, insect eggs, colloids, etc. For sewage treatment plants in large cities, due to the large amount of industrial wastewater discharged into the system, the heavy metal content in sewage sludge is relatively high, and the content of lead, arsenic, and cadmium is often close to or exceeds the acceptance standard for sludge as agricultural compost The sludge discharged from the sewage treatment plant is generally a loose, colloidal paste with a water content of 80% to 90%. Very bad for handling and shipping.
目前，针对我国污泥的处置技术主要有焚烧、堆肥、填埋等，但其中最易被我国国情所接受的是污泥预处理填埋，不仅能保证污泥无害化处理，而且符合当前我国的经济水平。预处理填埋常见的方式是污泥固化稳定化处理技术，污泥的固化处理是指用物理和化学方法将污泥颗粒胶结、掺合并包裹在密实的惰性基材中，形成整体性较好的固化体的一种过程；污泥的稳定化是将污泥中有毒、有害污染物转变为低溶解性、低迁移性及低毒性的物质过程，污泥固化稳定化是当前最常用的污泥预处理填埋处置技术。At present, the disposal technologies for sludge in my country mainly include incineration, composting, landfill, etc., but among them, sludge pretreatment and landfill are most easily accepted by my country's national conditions, which can not only ensure the harmless treatment of sludge, but also meet the current my country's economic level. The common method of pretreatment and landfill is sludge solidification and stabilization treatment technology. The solidification treatment of sludge refers to the use of physical and chemical methods to cement, blend and wrap sludge particles in a dense inert substrate to form a better integrity. A process of solidification; sludge stabilization is the process of transforming toxic and harmful pollutants in sludge into substances with low solubility, low mobility and low toxicity. Sludge solidification and stabilization is currently the most commonly used sludge Sludge pretreatment landfill disposal technology.
现有的脱水污泥固化剂掺加量一般在15％～30％之间，导致污泥固化体增容比较大，难以实现污泥减量化处理，因此急需一种固化稳定化效果好、掺加量低的脱水污泥固化剂。The amount of the existing dewatered sludge solidifying agent is generally between 15% and 30%, which leads to a relatively large increase in the volume of the solidified sludge, and it is difficult to achieve sludge reduction treatment. Therefore, there is an urgent need for a solidification and stabilization effect. Dewatered sludge solidifying agent with low dosage.
发明内容Contents of the invention
针对现有技术存在的问题，本发明提供一种脱水污泥固化剂、制备方法与使用方法，该固化剂采用固体废弃物为原料，利用固体废弃物自身化学性质和相互间的活性激发，实现了脱水污泥的固化稳定化。Aiming at the problems existing in the prior art, the present invention provides a dewatered sludge curing agent, a preparation method and a use method. The curing agent uses solid waste as a raw material, and utilizes the chemical properties of the solid waste itself and the activity excitation between them to realize Solidification and stabilization of dewatered sludge.
本发明的脱水污泥固化剂，由磷矿石、电石渣、尾矿渣和大理石渣组成，成分按质量比为磷矿石：电石渣：尾矿渣：大理石渣＝(1～3):(1～3):(1～3):(1～3)进行混合；其中，磷矿石的磷品位为22～35％，电石渣的Ca(OH)2品位为62～75％，磷矿石、电石渣、尾矿渣和大理石渣粒度均≦100目。The dewatered sludge solidifying agent of the present invention is made up of phosphate rock, calcium carbide slag, tailings slag and marble slag, and composition is phosphate rock by mass ratio: carbide slag: tailings slag: marble slag=(1～3):(1 ～3):(1～3):(1～3) are mixed; wherein, the phosphorus grade of phosphate rock is 22～35%, the Ca(OH) 2 grade of carbide slag is 62～75%, and the phosphorus grade of phosphate rock is 22～35%. , Carbide slag, tailings slag and marble slag have a particle size of ≦100 mesh.
其中，磷矿石含有成分按质量百分比为：氟磷灰石20～38％，石英13～42％，白云石16～69％；电石渣含有成分按质量百分比为：氧化钙60～75％，石英6～15％，氧化镁2～5％，氧化铝0.50～1％，三氧化二铁1～3％；尾矿渣含有成分按质量百分比为：石英为20～75％，氧化铝为5～10％，三氧化二铁为3～7％；大理石渣含有成分按质量百分比为：碳酸钙为50～70％，石英为8～12％，氧化铝为15～25％。Among them, the composition of phosphate rock is 20-38% by mass percentage of fluorapatite, 13-42% of quartz, 16-69% of dolomite; the content of calcium carbide slag is 60-75% of calcium oxide, 6-15% of quartz, 2-5% of magnesium oxide, 0.50-1% of aluminum oxide, 1-3% of ferric oxide; the tailings slag contains 20-75% of quartz, 5-5% of alumina 10%, ferric oxide 3-7%; marble slag contains 50-70% calcium carbonate, 8-12% quartz, and 15-25% alumina.
本发明的脱水污泥固化剂的制备方法，包括以下步骤：The preparation method of dewatered sludge solidifying agent of the present invention comprises the following steps:
步骤1、将磷矿石、电石渣、尾矿渣和大理石渣，分别用水清洗后，在105～110℃条件下烘干6～8h；Step 1. After washing the phosphate rock, calcium carbide slag, tailings slag and marble slag with water respectively, dry at 105-110°C for 6-8 hours;
步骤2、采用破碎机将磷矿石、电石渣、尾矿渣和大理石渣分别逐级破碎至1mm以下，再采用球磨机分别进行球磨，破碎、球磨后各种矿石粒径均≦100目；Step 2. Use a crusher to crush the phosphate rock, calcium carbide slag, tailings slag and marble slag step by step to less than 1mm, and then use a ball mill to perform ball milling. After crushing and ball milling, the particle sizes of various ores are all ≦100 mesh;
步骤3、在常温下，将经过处理后的磷矿石、电石渣、尾矿渣和大理石渣按照脱水污泥固化剂的配比混合均匀，形成脱水污泥固化剂。Step 3. Mix the treated phosphate rock, calcium carbide slag, tailings slag and marble slag evenly according to the ratio of the dewatered sludge curing agent at normal temperature to form a dewatered sludge curing agent.
上述的脱水污泥固化剂的制备方法的步骤2中，采用鄂式破碎机将磷矿石、电石渣、尾矿渣和大理石渣进行破碎，采用立式行星球磨机进行球磨。In step 2 of the above-mentioned preparation method of the dewatered sludge solidifying agent, the phosphate rock, calcium carbide slag, tailings slag and marble slag are crushed by a jaw crusher, and ball milled by a vertical planetary ball mill.
上述的脱水污泥固化剂的制备方法的步骤2中，磷矿石、电石渣、尾矿渣和大理石渣的球磨时间均为4～6h，优选4h；In step 2 of the above-mentioned preparation method of dewatered sludge solidifying agent, the ball milling time of phosphate rock, carbide slag, tailings slag and marble slag is all 4 to 6 hours, preferably 4 hours;
本发明的脱水污泥固化剂的使用方法，包括以下步骤：The using method of dewatered sludge solidifying agent of the present invention comprises the following steps:
将脱水污泥与脱水污泥固化剂，按质量比为1:(0.05～0.1)加入到混合搅拌机，在常温下搅拌4～6min，搅拌均匀，实现脱水污泥的固化。Add dewatered sludge and dewatered sludge solidifying agent to the mixing mixer according to the mass ratio of 1: (0.05-0.1), and stir at room temperature for 4-6 minutes, and stir evenly to realize the solidification of dewatered sludge.
上述的脱水污泥固化剂的使用方法中所用的脱水污泥，取自于污水处理厂，其含水量低于90％。The dewatered sludge used in the above method of using the dewatered sludge solidifying agent is taken from a sewage treatment plant, and its water content is lower than 90%.
本发明的有益效果：Beneficial effects of the present invention:
1、磷矿石、尾矿渣、电石渣和大理石渣均经水洗、破碎、球磨预处理，去除其中的可溶性盐，避免可溶性盐对后续水化反应的影响，提高了胶凝反应强度。1. Phosphate rock, tailings slag, calcium carbide slag and marble slag are all pretreated by water washing, crushing and ball milling to remove soluble salts, avoid the influence of soluble salts on the subsequent hydration reaction, and improve the gelation reaction intensity.
2、磷矿石中的磷可和污泥中大量重金属元素形成不溶物，从而实现重金属的稳定化；电石渣不仅可激发尾矿渣和大理石渣中的活性氧化物，生成硅铝基凝胶实现污泥的固化，使污泥抗压强度提高，还可以调节污泥体系为强碱性，保证尾矿渣和大理石渣中活性氧化物的充分激发，生成的硅铝基凝胶可实现脱水污泥的固化。2. Phosphorus in phosphate rock can form insoluble matter with a large number of heavy metal elements in sludge, thereby realizing the stabilization of heavy metals; carbide slag can not only stimulate active oxides in tailings slag and marble slag, but also generate silica-alumina-based gel to achieve The solidification of sludge can improve the compressive strength of sludge, and can also adjust the sludge system to be strongly alkaline to ensure the full excitation of active oxides in tailings slag and marble slag, and the generated silica-alumina-based gel can realize dewatering sludge of solidification.
3、该固化剂采用固体废弃物为原料，原料来源广泛、成本低，利用固体废弃物自身化学性质和相互间的活性激发，实现了脱水污泥的固化稳定化。3. The curing agent uses solid waste as raw material. The source of raw material is wide and the cost is low. Using the chemical properties of solid waste itself and the activity excitation between them, the solidification and stabilization of dewatered sludge is realized.
4、与传统方法相比，采用该固化剂脱水污泥的固化稳定化效果好，且制备简便，固化后的脱水污泥对环境不造成二次污染。4. Compared with the traditional method, the solidification and stabilization effect of the dewatered sludge using the curing agent is good, and the preparation is simple, and the solidified dewatered sludge does not cause secondary pollution to the environment.
具体实施方式detailed description
实施例1Example 1
本实施例的脱水污泥固化剂，由磷矿石、电石渣、尾矿渣和大理石渣组成，成分按质量比为磷矿石：电石渣：尾矿渣：大理石渣＝1：1：1：1进行混合；其中，磷矿石的磷品位为25％，电石渣的Ca(OH)2品位为65％，磷矿石、电石渣、尾矿渣和大理石渣粒度均≦100目。The dewatered sludge solidifying agent in this embodiment is composed of phosphate rock, calcium carbide slag, tailings slag and marble slag, and the composition is phosphate rock: carbide slag: tailings slag: marble slag = 1:1:1:1 Mixing; wherein, the phosphorus grade of the phosphate rock is 25%, the Ca(OH) 2 grade of the carbide slag is 65%, and the particle size of the phosphate rock, carbide slag, tailings slag and marble slag are all≦100 mesh.
磷矿石含有成分按质量百分比为：氟磷灰石25％，石英19％，白云石50％；电石渣含有成分按质量百分比为：氧化钙65％，石英12％，氧化镁2％，氧化铝0.5％，三氧化二铁1％；尾矿渣含有成分按质量百分比为：石英42％，氧化铝为5％，三氧化二铁为7％；大理石渣含有成分按质量百分比为：碳酸钙为50％，石英为9％，氧化铝为25％。The composition of phosphate rock is: 25% of fluorapatite, 19% of quartz, 50% of dolomite; the composition of calcium carbide slag is: 65% of calcium oxide, 12% of quartz, 2% of magnesium oxide, Aluminum 0.5%, ferric oxide 1%; tailings slag contains 42% of quartz, 5% of aluminum oxide and 7% of ferric oxide by mass percentage; marble slag contains calcium carbonate by mass percentage 50%, Quartz 9%, Alumina 25%.
本实施例的脱水污泥固化剂的制备方法，包括以下步骤：The preparation method of the dewatered sludge solidifying agent of the present embodiment may further comprise the steps:
步骤1、将磷矿石、电石渣、尾矿渣和大理石渣，分别用水清洗后，在105℃条件下烘干6h；Step 1. After washing the phosphate rock, calcium carbide slag, tailings slag and marble slag with water respectively, dry them at 105°C for 6 hours;
步骤2、采用鄂式破碎机将磷矿石、电石渣、尾矿渣和大理石渣分别逐级破碎至1mm以下，采用立式行星球磨机分别进行球磨，球磨时间均为4h，破碎、球磨后各种矿石粒径≦100目；Step 2. Use a jaw crusher to crush phosphate rock, calcium carbide slag, tailings slag and marble slag step by step to less than 1mm, and use a vertical planetary ball mill to perform ball milling. The ball milling time is 4 hours. After crushing and ball milling, various Ore particle size≦100 mesh;
步骤3、在常温下，将经过处理后的磷矿石、电石渣、尾矿渣和大理石渣按照脱水污泥固化剂的配比混合均匀，形成脱水污泥固化剂。Step 3. Mix the treated phosphate rock, calcium carbide slag, tailings slag and marble slag evenly according to the ratio of the dewatered sludge curing agent at normal temperature to form a dewatered sludge curing agent.
本实施例的脱水污泥固化剂的使用方法，包括以下步骤：The using method of the dewatered sludge solidifying agent of the present embodiment comprises the following steps:
将脱水污泥投加到混合搅拌机，添加脱水污泥固化剂，脱水污泥与脱水污泥固化剂的质量比为1:0.05，在常温条件下，开动搅拌机搅拌4min，搅拌均匀，实现脱水污泥的固化。Add the dewatered sludge to the mixing mixer, add the dewatered sludge curing agent, the mass ratio of the dewatered sludge to the dewatered sludge curing agent is 1:0.05, and start the mixer to stir for 4 minutes under normal temperature conditions, and stir evenly to achieve dewatered sludge Solidification of mud.
本实施例中固化后的脱水污泥在常温常压覆膜养护3天后，采用万能试验机测量其抗压强度为55KPa；根据标准HJ 557-2010，采用水平振荡法，用pH计测量浸出液的pH，pH为6.3。The dewatered sludge solidified in the present embodiment is after 3 days of normal temperature and pressure coating curing, and its compressive strength is measured by a universal testing machine to be 55KPa; according to the standard HJ 557-2010, the horizontal oscillation method is adopted, and the pH value of the leaching solution is measured with a pH meter. pH, the pH is 6.3.
实施例2Example 2
本实施例的脱水污泥固化剂，由磷矿石、电石渣、尾矿渣和大理石渣组成，成分按质量比为磷矿石：电石渣：尾矿渣：大理石渣＝3：2：3：2进行混合；其中，磷矿石的磷品位为28％，电石渣的Ca(OH)2品位为62％，磷矿石、电石渣、尾矿渣和大理石渣粒度均≦100目。The dewatered sludge solidifying agent in this embodiment is composed of phosphate rock, carbide slag, tailings slag and marble slag, and the composition is phosphate rock: carbide slag: tailings slag: marble slag = 3:2:3:2 Mixing; wherein, the phosphorus grade of the phosphate rock is 28%, the Ca (OH) grade of the carbide slag is 62%, and the particle size of the phosphate rock, carbide slag, tailings slag and marble slag are all≦100 mesh.
磷矿石含有成分按质量百分比为：氟磷灰石22％，石英13％，白云石60％；电石渣含有成分按质量百分比为：氧化钙62％，石英6％，氧化镁5％，氧化铝1％，三氧化二铁1％；尾矿渣含有成分按质量百分比为：石英为24％，氧化铝为10％，三氧化二铁为6％；大理石渣含有成分按质量百分比为：碳酸钙为50％，石英为12％，氧化铝为24％。The composition of phosphate rock is: 22% of fluorapatite, 13% of quartz, 60% of dolomite; the composition of calcium carbide slag is: 62% of calcium oxide, 6% of quartz, 5% of magnesium oxide, Aluminum 1%, ferric oxide 1%; tailings slag contains 24% of quartz, 10% of alumina, 6% of ferric oxide; marble slag contains calcium carbonate 50% for quartz, 12% for quartz, and 24% for alumina.
本实施例的脱水污泥固化剂的制备方法，包括以下步骤：The preparation method of the dewatered sludge solidifying agent of the present embodiment may further comprise the steps:
步骤1、将磷矿石、电石渣、尾矿渣和大理石渣，分别用水清洗后，在107℃条件下烘干7h；Step 1. After washing the phosphate rock, calcium carbide slag, tailings slag and marble slag with water respectively, dry them at 107°C for 7 hours;
步骤2、采用鄂式破碎机将磷矿石、电石渣、尾矿渣和大理石渣分别逐级破碎至1mm以下，采用立式行星球磨机分别进行球磨，球磨时间为均4h，破碎、球磨后各种矿石粒径≦100目；Step 2. Use a jaw crusher to crush phosphate rock, calcium carbide slag, tailings slag and marble slag step by step to less than 1mm respectively, and use a vertical planetary ball mill to perform ball milling respectively. The ball milling time is 4 hours on average. After crushing and ball milling, various Ore particle size≦100 mesh;
步骤3、在常温下，将经过处理后的磷矿石、电石渣、尾矿渣和大理石渣按照脱水污泥固化剂的配比混合均匀，形成脱水污泥固化剂。Step 3. Mix the treated phosphate rock, calcium carbide slag, tailings slag and marble slag evenly according to the ratio of the dewatered sludge curing agent at normal temperature to form a dewatered sludge curing agent.
本实施例的脱水污泥固化剂的使用方法，包括以下步骤：The using method of the dewatered sludge solidifying agent of the present embodiment comprises the following steps:
将脱水污泥投加到混合搅拌机，添加脱水污泥固化剂，脱水污泥与添加的脱水污泥固化剂的质量比为1:0.07，在常温条件下，开动搅拌机搅拌6min，搅拌均匀，实现脱水污泥的固化。Add the dewatered sludge to the mixing mixer, add the dewatered sludge solidifying agent, the mass ratio of the dewatered sludge to the added dewatered sludge solidifying agent is 1:0.07, and under normal temperature conditions, start the mixer to stir for 6 minutes, and stir evenly to achieve Solidification of dewatered sludge.
本实施例中固化后的脱水污泥在常温常压覆膜养护3天后，采用万能试验机测量其抗压强度为58KPa；根据标准HJ 557-2010，采用水平振荡法，用pH计测量浸出液的pH，pH为7.8。After the solidified dewatered sludge in this embodiment is maintained at normal temperature and pressure for 3 days, its compressive strength is measured by a universal testing machine to be 58KPa; according to the standard HJ 557-2010, the horizontal oscillation method is used to measure the concentration of the leaching solution with a pH meter. pH, the pH is 7.8.
实施例3Example 3
本实施例的脱水污泥固化剂，由磷矿石、电石渣、尾矿渣和大理石渣组成，成分按质量比为磷矿石：电石渣：尾矿渣：大理石渣＝1：2：1：2进行混合；其中，磷矿石的磷品位为30％，电石渣的Ca(OH)2品位为68％，磷矿石、电石渣、尾矿渣和大理石渣粒度均≦100目。The dewatered sludge solidifying agent in this embodiment is composed of phosphate rock, calcium carbide slag, tailings slag and marble slag, and the composition is phosphate rock: carbide slag: tailings slag: marble slag = 1:2:1:2 Mixing; wherein, the phosphorus grade of the phosphate rock is 30%, the Ca(OH) 2 grade of the carbide slag is 68%, and the particle size of the phosphate rock, carbide slag, tailings slag and marble slag are all≦100 mesh.
磷矿石含有成分按质量百分比为：氟磷灰石29％，石英42％，白云石16％；电石渣含有成分按质量百分比为：氧化钙65％，石英15％，氧化镁3％，氧化铝0.6％，三氧化二铁2％；尾矿渣含有成分按质量百分比为：石英为29％，氧化铝为8％，三氧化二铁为5％；大理石渣含有成分按质量百分比为：碳酸钙为55％，石英为10％，氧化铝为25％。The composition of phosphate rock is: 29% of fluorapatite, 42% of quartz, 16% of dolomite; the composition of calcium carbide slag is: 65% of calcium oxide, 15% of quartz, 3% of magnesium oxide, Aluminum 0.6%, ferric oxide 2%; tailings slag contains 29% of quartz, 8% of aluminum oxide and 5% of ferric oxide by mass percentage; marble slag contains calcium carbonate by mass percentage 55% for quartz, 10% for quartz, and 25% for alumina.
本实施例的脱水污泥固化剂的制备方法，包括以下步骤：The preparation method of the dewatered sludge solidifying agent of the present embodiment may further comprise the steps:
步骤1、将磷矿石、电石渣、尾矿渣和大理石渣，分别用水清洗后，在110℃条件下烘干8h；Step 1. After washing the phosphate rock, calcium carbide slag, tailings slag and marble slag with water respectively, dry at 110°C for 8 hours;
步骤2、采用鄂式破碎机将磷矿石、电石渣、尾矿渣和大理石渣分别逐级破碎至1mm以下，采用立式行星球磨机分别进行球磨，球磨时间均为4h，破碎、球磨后各种矿石粒径≦100目；Step 2. Use a jaw crusher to crush phosphate rock, calcium carbide slag, tailings slag and marble slag step by step to less than 1mm, and use a vertical planetary ball mill to perform ball milling. The ball milling time is 4 hours. After crushing and ball milling, various Ore particle size≦100 mesh;
步骤3、在常温下，将经过处理后的磷矿石、电石渣、尾矿渣和大理石渣按照脱水污泥固化剂的配比混合均匀，形成脱水污泥固化剂。Step 3. Mix the treated phosphate rock, calcium carbide slag, tailings slag and marble slag evenly according to the ratio of the dewatered sludge curing agent at normal temperature to form a dewatered sludge curing agent.
本实施例的脱水污泥固化剂的使用方法，包括以下步骤：The using method of the dewatered sludge solidifying agent of the present embodiment comprises the following steps:
将脱水污泥投加到混合搅拌机，添加脱水污泥固化剂，脱水污泥与添加的脱水污泥固化剂的质量比为1:0.1，在常温条件下，开动搅拌机搅拌6min，搅拌均匀，实现脱水污泥的固化。Add the dewatered sludge to the mixing mixer, add the dewatered sludge solidifying agent, the mass ratio of the dewatered sludge to the added dewatered sludge solidifying agent is 1:0.1, and under normal temperature conditions, start the mixer to stir for 6 minutes, and stir evenly to achieve Solidification of dewatered sludge.
本实施例中固化后的脱水污泥在常温常压覆膜养护3天后，采用万能试验机测量其抗压强度为65KPa；根据标准HJ 557-2010，采用水平振荡法，用pH计测量浸出液的pH，pH为9.3。After the solidified dewatered sludge in this embodiment is covered with a film at normal temperature and pressure for 3 days, its compressive strength is measured by a universal testing machine to be 65KPa; according to the standard HJ 557-2010, the horizontal oscillation method is used to measure the concentration of the leaching solution with a pH meter. pH, the pH is 9.3.
实施例4Example 4
本实施例的脱水污泥固化剂，由磷矿石、电石渣、尾矿渣和大理石渣组成，成分按质量比为磷矿石：电石渣：尾矿渣：大理石渣＝1：3：1：3进行混合；其中，磷矿石的磷品位为22％，电石渣的Ca(OH)2品位为75％，磷矿石、电石渣、尾矿渣和大理石渣粒度均≦100目。The dewatered sludge solidifying agent in this embodiment is composed of phosphate rock, calcium carbide slag, tailings slag and marble slag, and the composition is phosphate rock: carbide slag: tailings slag: marble slag = 1:3:1:3 Mixing; wherein, the phosphorus grade of the phosphate rock is 22%, the Ca (OH) grade of the carbide slag is 75%, and the particle size of the phosphate rock, carbide slag, tailings slag and marble slag are all≦100 mesh.
磷矿石含有成分按质量百分比为：氟磷灰石30％，石英21％，白云石31％；电石渣含有成分按质量百分比为：氧化钙67％，石英10％，氧化镁4％，氧化铝0.9％，三氧化二铁1.5％；尾矿渣含有成分按质量百分比为：石英为31％，氧化铝为8％，三氧化二铁为4％；大理石渣含有成分按质量百分比为：碳酸钙为57％，石英为11％，氧化铝为23％。The composition of phosphate rock is: 30% of fluorapatite, 21% of quartz, 31% of dolomite; the composition of calcium carbide slag is: 67% of calcium oxide, 10% of quartz, 4% of magnesium oxide, Aluminum 0.9%, ferric oxide 1.5%; tailings slag contains 31% of quartz, 8% of aluminum oxide and 4% of ferric oxide by mass percentage; marble slag contains calcium carbonate by mass percentage It is 57%, quartz is 11%, and alumina is 23%.
本实施例的脱水污泥固化剂的制备方法，包括以下步骤：The preparation method of the dewatered sludge solidifying agent of the present embodiment may further comprise the steps:
步骤1、将磷矿石、电石渣、尾矿渣和大理石渣，分别用水清洗后，在105℃条件下烘干6h；Step 1. After washing the phosphate rock, calcium carbide slag, tailings slag and marble slag with water respectively, dry them at 105°C for 6 hours;
步骤2、采用鄂式破碎机将磷矿石、电石渣、尾矿渣和大理石渣分别逐级破碎至1mm以下，采用立式行星球磨机分别进行球磨，球磨时间均为4h，破碎、球磨后各种矿石粒径≦100目；Step 2. Use a jaw crusher to crush phosphate rock, calcium carbide slag, tailings slag and marble slag step by step to less than 1mm, and use a vertical planetary ball mill to perform ball milling. The ball milling time is 4 hours. After crushing and ball milling, various Ore particle size≦100 mesh;
步骤3、在常温下，将经过处理后的磷矿石、电石渣、尾矿渣和大理石渣按照脱水污泥固化剂的配比混合均匀，形成脱水污泥固化剂。Step 3. Mix the treated phosphate rock, calcium carbide slag, tailings slag and marble slag evenly according to the ratio of the dewatered sludge curing agent at normal temperature to form a dewatered sludge curing agent.
本实施例的脱水污泥固化剂的使用方法，包括以下步骤：The using method of the dewatered sludge solidifying agent of the present embodiment comprises the following steps:
将脱水污泥投加到混合搅拌机，添加脱水污泥固化剂，脱水污泥与添加的脱水污泥固化剂的质量比为1:0.05，在常温条件下，开动搅拌机搅拌5min，搅拌均匀，实现脱水污泥的固化。Add the dewatered sludge to the mixing mixer, add the dewatered sludge solidifying agent, the mass ratio of the dewatered sludge to the added dewatered sludge solidifying agent is 1:0.05, and under normal temperature conditions, start the mixer to stir for 5 minutes, and stir evenly to achieve Solidification of dewatered sludge.
本实施例中固化后的脱水污泥在常温常压覆膜养护3天后，采用万能试验机测量其抗压强度为60KPa；根据标准HJ 557-2010，采用水平振荡法，用pH计测量浸出液的pH，pH为7.3。After the solidified dewatered sludge in this embodiment is covered with a film at normal temperature and pressure for 3 days, its compressive strength is measured by a universal testing machine to be 60KPa; according to the standard HJ 557-2010, the horizontal oscillation method is used to measure the concentration of the leaching solution with a pH meter. pH, the pH is 7.3.
实施例5Example 5
本实施例的脱水污泥固化剂，由磷矿石、电石渣、尾矿渣和大理石渣组成，成分按质量比为磷矿石：电石渣：尾矿渣：大理石渣＝2：1：2：3进行混合；其中，磷矿石的磷品位为35％，电石渣的Ca(OH)2品位为70％，磷矿石、电石渣、尾矿渣和大理石渣粒度均≦100目。The dewatered sludge solidifying agent in this embodiment is composed of phosphate rock, calcium carbide slag, tailings slag and marble slag, and the composition is phosphate rock: carbide slag: tailings slag: marble slag = 2:1:2:3 Mixing; wherein, the phosphorus grade of the phosphate rock is 35%, the Ca(OH) 2 grade of the carbide slag is 70%, and the particle size of the phosphate rock, carbide slag, tailings slag and marble slag are all≦100 mesh.
磷矿石含有成分按质量百分比为：氟磷灰石35％，石英34％，白云石19％；电石渣含有成分按质量百分比为：氧化钙70％，石英9％，氧化镁4.5％，氧化铝0.7％，三氧化二铁1％；尾矿渣含有成分按质量百分比为：石英为38％，氧化铝为5％，三氧化二铁为3％；大理石渣含有成分按质量百分比为：碳酸钙为64％，石英为12％，氧化铝为25％。The composition of phosphate rock is: 35% of fluorapatite, 34% of quartz, 19% of dolomite; the composition of calcium carbide slag is: 70% of calcium oxide, 9% of quartz, 4.5% of magnesium oxide, Aluminum 0.7%, ferric oxide 1%; tailings slag contains 38% of quartz, 5% of aluminum oxide and 3% of ferric oxide by mass percentage; marble slag contains calcium carbonate by mass percentage 64% for quartz, 12% for quartz, and 25% for alumina.
本实施例的脱水污泥固化剂的制备方法，包括以下步骤：The preparation method of the dewatered sludge solidifying agent of the present embodiment may further comprise the steps:
步骤1、将磷矿石、电石渣、尾矿渣和大理石渣，分别用水清洗后，在105℃条件下烘干8h；Step 1. After washing the phosphate rock, calcium carbide slag, tailings slag and marble slag with water respectively, dry at 105°C for 8 hours;
步骤2、采用鄂式破碎机将磷矿石、电石渣、尾矿渣和大理石渣分别逐级破碎至1mm以下，采用立式行星球磨机分别进行球磨，球磨时间均为4h，破碎、球磨后各种矿石粒径≦100目；Step 2. Use a jaw crusher to crush phosphate rock, calcium carbide slag, tailings slag and marble slag step by step to less than 1mm, and use a vertical planetary ball mill to perform ball milling. The ball milling time is 4 hours. After crushing and ball milling, various Ore particle size≦100 mesh;
步骤3、在常温下，将经过处理后的磷矿石、电石渣、尾矿渣和大理石渣按照脱水污泥固化剂的配比混合均匀，形成脱水污泥固化剂。Step 3. Mix the treated phosphate rock, calcium carbide slag, tailings slag and marble slag evenly according to the ratio of the dewatered sludge curing agent at normal temperature to form a dewatered sludge curing agent.
本实施例的脱水污泥固化剂的使用方法，包括以下步骤：The using method of the dewatered sludge solidifying agent of the present embodiment comprises the following steps:
将脱水污泥投加到混合搅拌机，添加脱水污泥固化剂，脱水污泥与添加的脱水污泥固化剂的质量比为1:0.05，在常温条件下，开动搅拌机搅拌4min，搅拌均匀，实现脱水污泥的固化。Add the dewatered sludge to the mixing mixer, add the dewatered sludge solidifying agent, the mass ratio of the dewatered sludge to the added dewatered sludge solidifying agent is 1:0.05, and under normal temperature conditions, start the mixer to stir for 4 minutes, and stir evenly to achieve Solidification of dewatered sludge.
本实施例中固化后的脱水污泥在常温常压覆膜养护3天后，采用万能试验机测量其抗压强度为78KPa；根据标准HJ 557-2010，采用水平振荡法，用pH计测量浸出液的pH，pH为7.9。After the solidified dewatered sludge in this embodiment is covered with film at normal temperature and pressure for 3 days, its compressive strength is measured by a universal testing machine to be 78KPa; according to the standard HJ 557-2010, the horizontal oscillation method is used to measure the concentration of the leaching solution with a pH meter. pH, the pH is 7.9.
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| CN106865926A (en) * | 2017-03-09 | 2017-06-20 | 中交疏浚技术装备国家工程研究中心有限公司 | One kind has filled municipal sludge curing agent and its deep dehydration method |
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