共查询到20条相似文献,搜索用时 92 毫秒
1.
以鹤壁煤业集团九矿和寺湾矿矿井水为例,对高铁高锰矿井水的水质特征及其净化机制进行了研究.分析表明,矿井水具有溶解氧丰富、高矿化度、高浊度的特征,矿井水的处理不需专门设曝气装置;采用混凝沉淀和过滤模型试验,考察了铁、锰的去除效果及滤料、滤速等对过滤出水水质的影响,结果表明:混凝沉淀对铁的去除率在90%以上,对锰的去除率仅达20%左右;以KMnO4溶液浸泡过的锰砂为滤料,过滤(滤速7~9 m/h)出水铁、锰含量均在0.1 mg/L以下,表明锰砂表面所形成的活性复合物质滤膜对锰的去除起到了关键性作用. 相似文献
2.
3.
4.
针对酸性外排矿井水含有铁、锰等金属离子的问题,采用正交实验的实验方法,通过一系列实验,分析了pH、预曝气、曝气时间、氧化还原电位、滤料等5个主要影响因素,对曝气沉淀、接触氧化的工艺去除酸性矿井水中铁、锰的去除效率影响进行了研究. 相似文献
5.
针对中煤某矿井水高COD、高悬浮物的特点,采用混凝沉淀、过滤和反渗透工艺对矿井水进行了综合治理,考察其运行效果,对经济效益进行了分析。结果表明:经过絮凝沉淀和过滤工艺处理的出水水质可以达到井下消防、降尘洒水和选煤厂补水的用水标准,使废水重复利用,直接回用于矿区的生产,改善矿区用水紧张的局面。经反渗透系统(RO)深度处理后的外排水水质可以达到周边生态用水标准。RO系统深度处理前后的运行成本分别为0.416元/m3和0.738元/m3,每年节省水费高达270多万元。该工程项目的建成,不仅避免了废水直接外排对水资源的巨大浪费,也消除了对环境造成的不良影响,取得了良好的环境、社会和经济效益。 相似文献
6.
7.
为解决淄博市岳阳河地下酸性矿井水涌出污染环境的问题,设计采用石灰中和/充氧曝气/混凝沉淀/多级过滤组合工艺对该矿井水进行处理,文章对酸性矿井水处理的工艺流程、设计参数确定及工艺特点等进行了详细介绍。工程实践结果表明,当进水水质COD、NH3-N、SS、总Fe、Mn分别为46,27,24,395,7 mg/L时,采用该矿井水处理工艺,出水水质达到16,0.9,6,0.4,0.2 mg/L,说明矿井水水质得到有效改善,该组合处理工艺对于处理酸性矿井水具有较好的处理效果。 相似文献
8.
针对冀中能源峰峰集团大淑村矿高悬浮物矿井水处理混凝剂投加量大,混凝沉淀效果差等问题,研究了混凝剂种类、絮凝剂种类、混凝次数、混(絮)凝剂投加方式及投加量、反应转速等因素对矿井水悬浮物去除效果的影响。结果表明:最佳混凝剂为PAC,最佳絮凝剂为CPAM,混凝次数为两次,最佳投加方式及投加量为一次投加70 mg/L PAC和0.3 mg/L PAM,二次投加20 mg/L PAC和0.3 mg/L PAM,PAC投加量较常规混凝减少了25%,最佳转速为快搅210 r/min,慢搅60 r/min,最佳条件下出水浊度降到1.39 NTU,浊度去除率可达99%以上。工程应用表明:采用二重混凝沉淀工艺处理高悬浮物矿井水,对悬浮物和浊度的去除效果显著,出水水质稳定达标,节省了部分水资源费和投药成本,具有良好的经济效益和环境效益。 相似文献
9.
10.
11.
12.
鹤煤公司寺湾井是鹤壁矿区唯一开采太原群下夹煤的矿井,其水文地质条件复杂。分析了寺湾井水文地质特征和水害主要类型,针对不同水害类型采取了相应的"防、堵、疏、排、截"综合防治水技术措施,为鹤壁矿区下夹煤组的开采积累了丰富的实践经验,可供其他矿区类似条件矿井借鉴。 相似文献
13.
矿井建设的工程,在确保工期、质量的前提下,能够控制成本管理、把握造价对矿井建设的影响,才能以较低的成本投资,换得较高的收益。因此,在矿井的建设全过程中,对于造价的把握至关重要。文章将重点对矿井建设过程中造价影响因素分析,为有效的进行控制和管理提供借鉴。 相似文献
14.
改性火山岩处理高铁锰矿井水机理分析 总被引:1,自引:0,他引:1
以火山岩滤料为载体,制备了水合二氧化锰改性滤料用于去除矿井水的铁锰离子.在滤速为7.0 m/h,连续54 h的过滤周期内,改性火山岩对锰离子的去除率达94.8%~ 99.3%.结合X射线衍射(XRD),扫描电镜-能谱(SEM-EDS)等表征手段,确认火山岩改性后,表面覆盖的水合二氧化锰层具有丰富的表面羟基(以-Mn-OH表示),根据表面配合模式,其羟基中氢能与水中的Mn2+和Fe2+发生表面络合反应,最终Mn2+和Fe2+被表面羟基吸附并交换出氢,从而实现对铁锰离子的去除. 相似文献
15.
16.
Abstract. The removal of sulphate and metals from mine water was assessed using the integrated barium carbonate process and the co-precipitation
of barium sulphate with calcium carbonate. The rate of sulphate removal was influenced by the BaCO3 concentration and the cation associated with sulphate, and increased with increasing BaCO3-concentration. BaCO3 can only be used for removal of sulphate that is associated with calcium, as calcium is needed to remove the added carbonate
associated with the barium cation. Sulphate removal was only marginally influenced by alkalinity. Sulphide can be stripped
with CO2 from a BaS-solution. The (CO2 dosed/sulphide removed) molar ratio was close to unity for the first 50% of sulphide in solution. The stripped H2S-gas can be absorbed into zinc acetate. BaSO4 and CaCO3 can be converted simultaneously to BaS and CaO, respectively at an optimum temperature of 1050°C. The CaCO3/BaSO4 molar ratio has little influence on the yield of BaS. The running cost of the barium carbonate process for the removal of
2 g/L of sulphate totalled ZAR1.28/m3 (US$1.00 = ZAR7.0, Feb 2007), the capital redemption cost was R1.08/m3, and the value of the products (water and sulphur) totalled R2.76/m3. 相似文献
17.
G. B. Douglas L. A. Wendling R. Pleysier M. G. Trefry 《Mine Water and the Environment》2010,29(2):108-115
Process water from the Ranger Uranium Mine requires treatment to meet stringent environmental water quality criteria. The
acidic water contains substantial SO4, metals, and U. One novel treatment method under consideration is the use of Na-aluminate to both neutralise the process
water and precipitate hydrotalcites. Hydrotalcites are a class of Mg–Al layered double hydroxide minerals with a typical endmember
chemical composition: Mg6Al2(A)(OH)16·n(H2O), where A = CO3
2−, SO4
2−, etc. Many acidic wastewaters contain Mg and/or Al in sufficient abundance for hydrotalcite formation upon addition of alkali
to achieve solution pH > 5, and Mg and/or Al to attain a Mg:Al ratio of 2 to 3:1. The utility of hydrotalcites lies in their
ability to incorporate a range of cationic (Cu2+, UO2
2+), metalloid (AsO4
3−), and (oxy)anionic contaminants (CrO4
2−). The broad spectrum removal of contaminants, including U, also indicates that hydrotalcites and their derivatives could
potentially be used as a containment material in nuclear waste repositories. In this study, Ranger process water derived from
extraction of U from chloritic schist was treated with Na-aluminate sourced from Bayer process liquor, in combination with
NaOH or Ca(OH)2. Hydrotalcites formed as the primary mineral during process water neutralisation with the ability to simultaneously remove
a suite of contaminants from solution. 相似文献
18.
介绍了新义井田充水含水层的情况,分析了新义矿井的充水通道,提出了针对性防治水措施,为同类矿井防治水工作提供了参考依据. 相似文献
19.