钙镁泥注井改造及效益分析

卤水净化产生的钙镁泥在转运掩埋过程中面临诸多问题,环境污染严重,浪费土地资源且成本费用大.文章对钙镁泥注井改造,克服了泥浆长距离输送的困难,取得了很好的环境改善及经济效益.     

制盐卤水净化过程中絮凝剂筛选

本文通过对八种絮凝剂的助沉效果评定,优选出分别适用于制盐卤水净化过程中产生的CaCO_3泥,Mg(OH)_2泥及钙、镁混合泥的絮凝剂品种及其最佳用量。并提出,Mg(OH)_2与CaCO_3盐泥能彼此促进对方的沉降,在工艺许可的情况下,不必将两者分开。     

卤水净化钙镁泥注入井下的工艺改进

在卤水净化过程中，对生产中产生的钙镁泥的处理，一直是一个比较令人头疼的问题。为了解决这个问题，采区经周密的研究分析，决定暂时将其注入报废盐井溶腔，并合理的改进了工艺，取得较好的效果。     

利用盐湖卤水制备高纯超细氢氧化镁

文章探索以吉兰泰盐湖卤水的沉淀镁泥为镁源,制备高纯、超细氢氧化镁的工艺条件.考察了操作条件对沉淀镁泥酸化提镁、酸浸液净化除钙效率的影响.实验结果表明,以净化后的酸浸液为镁源,以氨水为沉淀剂,添加分散剂PEG2000,并采用适宜工艺条件,可制备超细氢氧化镁粉体.对所得氢氧化镁样品用X射线粉末衍射仪和透射电子显微镜进行形貌、物相和纯度的表征,采用HG/T3607-2000标准中的方法对氢氧化镁样品进行主要成分及含量分析,结果表明,氢氧化镁样品为多边形片状,分散性较好,平均粒径为89.5nm,纯度达到了HG/T3607-2000标准.     

乳清含盐量与电导关系曲线

含盐乳清粉、脱盐乳清粉或乳清溶液，其含盐量都可以用灰化法测定。由于灰化法试样在马福炉内灼烧所需时间长，在脱盐乳清粉的生产过程中及时控制盐分结果就难以做到。这样对于批量生产脱盐乳清粉非常不利。本文开发的电导测定法使用电导仪测出已和含盐量的乳清的电导率，在不同温度下（２０°±１℃；６０±１℃）作出电导率与食盐量的关系曲线，这样在生产脱盐乳清过程中，几分钟即可用电导计法测出明盐乳液的含盐量。     

昆明盐矿卤水净化改造及钙镁泥处理方案

作者针对该矿卤水净人及钙镁泥处理中存在的问题，提出了比较合理的改造方案，并供同类型矿参考。     

混合投料法净化卤水

卤水净化对制盐生产越来越显示出它的重要性。传统的除钙镁方法采用两级反应，在一个反应罐中除镁，沉清卤再转至另一反应罐除钙，生产负荷很大。本文介绍昆明盐矿已经成功使用的混合投料净化方法，供同行借鉴。     

卤水净化与钙镁提纯利用研究

钙镁型卤水的净化工艺和钙镁提纯利用研究,既有利节约资源,也是提高产品质量和经济效益的需要,符合国家新兴节能环保产业政策。通过改进两碱法实现钙镁分离,可以分别得到高纯度Mg（OH）2和超细CaCO3两种高价值产品。     

“钙镁泥”综合利用的研究

我厂卤水采用“纯碱、烧碱一步除净法”除去卤水中的钙离子和镁离子,这样就得到一种以碳酸钙、氢氧化镁为主的所谓“钙镁泥”。“钙镁泥”成份如下:碳酸钙90%以上,氢氧化镁1%左右,氯化钠2%左右,硫酸钠1%左右以及三氧化二铁等。“钙镁泥”的白     

盐硝行业卤水净化中固废钙镁泥以废治废的利用

通过对盐硝行业中卤水净化工序产生的钙镁泥固废的分析研究,通过合理工艺洗涤盐水,去除钙镁泥中污染因子氯离子以及钠的减量,合理利用钙镁泥作燃煤烟气脱硫,达到以废治废、满足环保需要的目的。     

不同物理方式辅助处理对青梅盐胚脱盐效果和品质的影响

该研究采用振荡、超声波、间歇真空的物理辅助方式对比静置浸泡青梅盐胚脱盐,分析不同处理方式对青梅盐胚脱盐效果和品质的影响。结果表明,经振荡浸泡、超声辅助浸泡方式脱盐4 h后,脱盐率与梅胚水分含量均达到相对平衡状态,脱盐率超过60%,而间歇真空浸泡和静置浸泡方式脱盐8 h后脱盐率仍低于60%;超声波辅助浸泡脱盐后梅胚中有机酸含量39.26 mg/g显著高于其它脱盐方式,多酚含量458.06 mg/kg仅次于间歇真空辅助浸泡方式的501.56 mg/kg,但显著高于振荡浸泡、静置浸泡,四种方式脱盐的梅胚抗氧化活性无显著性差异;振荡浸泡、超声辅助浸泡脱盐的梅胚渗糖4 d后青梅果脯总糖含量分别达36.52%、34.10%,优于静置浸泡、间歇真空辅助浸泡的27.12%、24.37%。综上,在确保脱盐效率前提下,超声辅助浸泡为适合青梅盐胚脱盐较佳的物理辅助方式,可有效保留梅胚有机酸并提升脱盐梅胚的渗糖效率。     

Use of olive biomass fly ash in the preparation of environmentally friendly mortars

The incorporation of fly ash from olive biomass (FAOB) combustion in cogeneration plants into cement based mortars was explored by analyzing the chemical composition, mineralogical phases, particle size, morphology, and IR spectra of the resulting material. Pozzolanic activity was detected and found to be related with the presence of calcium aluminum silicates phases. The preparation of new olive biomass fly ash content mortars is effective by replacing either CaCO(3) filler or cement with FAOB. In fact, up to 10% of cement can be replaced without detracting from the mechanical properties of a mortar. This can provide an alternative way to manage the olive biomass fly ash as waste produced in thermal plants and reduce cement consumption in the building industry, and hence an economically and environmentally attractive choice.     

TD-11吸附剂对盐矿卤水中钙镁离子吸附净化实验研究

采用TD-11吸附剂,对盐矿卤水中钙镁离子进行吸附净化实验,考察了卤水操作流速、pH值及钙镁总浓度等对吸附净化效果的影响.实验结果表明,TD-11吸附剂能有效吸附去除化学净化后卤水中的钙镁离子;提高卤水过柱流速,吸附净化效果变差;升高卤水pH值及降低钙镁离子总浓度,则有利于钙镁离子的吸附净化.TD-11吸附剂适宜的吸附操作条件为:pH值为9～10,卤水钙镁总浓度控制在5 mg/kg～8 mg/kg,吸附操作流速控制在0.6 mm/s～1.0 mm/s.     

浓海水-钙法制取氢氧化镁工艺研究

浓海水—钙法(轻烧白云石、石灰)制取氢氧化镁具有生产成本低、资源丰富的优势,但传统钙法生产的氢氧化镁存在杂质含量高、产品纯度低等缺陷。文章以自主研发的专利技术为基础,从原料预处理、氢氧化镁合成、硫酸钙沉降、沉淀洗涤等方面对浓海水—钙法制取氢氧化镁的工艺进行改进。结果表明,采用改进后的工艺制备的氢氧化镁质量符合行业标准要求,氧化钙含量明显降低,同时得到高质量的副产硫酸钙。     

Recycling of porcelain tile polishing residue in portland cement: hydration efficiency

Ceramic tiles are widely used by the construction industry, and the manufacturing process of ceramic tiles generates as a major residue mud derived from the polishing step. This residue is too impure to be reused in the ceramic process and is usually discarded as waste in landfills. But the analysis of the particle size and concentration of silica of this residue shows a potential use in the manufacture of building materials based on portland cement. Tests were conducted on cement pastes and mortars using the addition of 10% and 20% (mass) of the residue. The results of compressive strength in mortars made up to 56 days showed a significant increase in compressive strength greater than 50%. The result of thermogravimetry shows that portlandite is consumed by the cement formed by the silica present in the residue in order to form calcium silicate hydrate and featuring a pozzolanic reaction. This effect improves the performance of cement, contributes to research and application of supplementary cementitious materials, and optimizes the use of portland cement, reducing the environmental impacts of carbon dioxide emissions from its production.     

膜蒸馏海水及苦咸水淡化研究进展

海水淡化是解决我国水资源短缺的重要措施之一.膜蒸馏海水和苦咸水淡化技术可充分利用太阳能、废热和余热等低品位热源,具有成本低、设备简单、操作容易、能耗低等优点,使膜蒸馏技术在诸多海水淡化工程中有一定的竞争力.采用膜蒸馏技术进行苦咸水淡化,可以解决饮用水和工业生产对淡水的需求.膜蒸馏苦咸水淡化具有广阔的应用前景.     

Production of calcium- and magnesium-enriched caseins and caseinates by an ecofriendly technology

Finding new environmentally friendly ways of producing proteins has never been of such critical public interest, both to meet consumers' needs and to preserve the environment. Milk proteins are among the most attractive protein types due to their high nutritional value and attractive functional properties. In this work, the separation of caseins by conventional chemical acidification was compared with electrodialysis with bipolar membrane coupled to an ultrafiltration module (EDBM-UF), a green process that allows the precipitation of caseins by H⁺ generated in situ by the bipolar membrane and, simultaneously, the production of a separated NaOH stream from OH^? electrogenerated by the bipolar membrane. Caseinate production using this NaOH stream by-product and the quantity of NaOH needed to produce caseinates from both methods were also investigated. Hence, the purity and composition of caseins and caseinates were compared in terms of protein, ash, and lactose contents as well as mineral composition. The results showed for the first time that caseinates can be produced by solubilizing caseins with NaOH stream from the EDBM process. Furthermore, the caseins and caseinates produced by EDBM-UF were equivalent in terms of lactose and protein contents to their respective caseins and caseinates that were chemically produced but presented slightly lower sodium content and 3 to 4 times higher magnesium and calcium contents. The fact that calcium and magnesium are likely bound to milk caseins would ensure their favorable absorbability. These caseins or caseinates from the new EDBM-UF process could be suitable as an improved protein-based calcium or magnesium supplement, both for their enhanced nutritional quality and because they are produced by a “green” process.