亚硫酸钙——石膏法在铅烧结烟气脱硫中的应用

介绍了一种新的脱硫方法“亚硫酸钙——石膏法”的脱硫、防垢机理及用于治理冶炼厂铅烧结低浓度 SO2 烟气的工艺流程、主要技术经济指标和运行效果 ,进行了社会、经济效益分析和方法述评。实践证明 ,该技术不易结垢 ,运行稳定 ,费用低 ,有广阔的应用前景     

碱性固硫剂的固硫效果分析

本文描述了各种碱性氧化物固硫效果选择实验结果,论述了煤种,燃烧温度、钙/硫比、Fe_2O_3对固硫效果的影响。     

原子吸收光谱法测定酸雨中K、Na、Ca、Mg方法改进

用0．1％硝酸溶液配制混合标准溶液，不加抗干扰试剂，火焰原子吸收光谱法直接测定酸雨中K、Na、Ca、Mg，方法精密度、准确度满足酸雨监测的分析要求。     

Catalytic conversion of waste tyres into valuable hydrocarbons

Tyre recycling has become a necessity because of the huge piles of tyres that represent a threat to the environment. The used tyres represent a source of energy and valuable chemical products. Waste tyres were pyrolysed catalytically in a batch reactor under atmospheric pressure. Calcium carbide was used as a catalyst to explore its effect on pyrolysis product distribution. The effect of temperature, amount of catalyst and time on the yields of the pyrolysed products was investigated. Char yield decreased with increase of pyrolysis temperature while total gas and liquid yields increased. The liquid fraction was obtained with boiling point up to 320 °C. The physical and chemical properties of the pyrolysed products obtained were characterized. The catalytic pyrolysis produced 45 wt.% aromatic, 35 wt.% aliphatic and 20 wt.% of polar hydrocarbons. The distillation data showed that ∼80% of oil has boiling point below 270 °C which is the boiling point for 50% of distilled product in commercial diesel oil. The oil fraction was found to have high gross calorific value; GCV (42.8 MJ kg⁻¹). Its Specific gravity, viscosity, Kinematic viscosity, freezing point and diesel index were also within the limits of diesel fuel. The char residues were studied to investigate their characteristics for use as a possible adsorbent. Surface area of char before and after acid demineralization was determined to determine the adsorptive features for waste water treatment.     

用废锂电池制备Co3O4

将废锂电池正极用酸溶解，再分别采用分步沉淀法和吸附沉淀法去除废锂电池液中的Fe^3＋，Al^3＋，Ca^2＋，Mg^2＋，抽滤后得到含CoSO。的滤液；用NaHCO3作沉淀剂，对CoSO4滤液进行沉淀反应，将得到的沉淀物过滤、洗涤、干燥后得CoCO4粉末；将CoCO4粉末进行煅烧后得Co3O4粉末。实验得出的制备CoCO4粉末的最佳工艺条件：反应温度50℃，用NaHCO，作沉淀剂；制备Co3O4粉末的最佳工艺条件：煅烧温度600℃，煅烧时间大于4h。在该条件下得到的Co3O4粉末符合锂电池生产的要求。     

纳米碳酸钙碳化法生产方法研究

简要介绍了碳化法生产纳米碳酸钙工艺流程。重点探讨了其中的碳化方法，获知目前我国主要有鼓泡碳化、喷雾碳化和超重力碳化等的碳化工艺。同时着重探讨了碳化反应的机理，并以此为依据讨论和比较了鼓泡碳化、喷雾碳化和超重力碳化3种碳化工艺。     

利用废锂渣制备碳酸锂

介绍了用生产丁基过程中的渣制备碳酸锂的工艺过程及最佳工艺条件,在碳酸钠加入量为理论需要量的110％、pH为9－10、陈化时间为12h、干燥温度为450℃、干燥时间为2h的条件下,碳酸锂的总收率为70.3%左右,产品的纯度为98％左右,产品质量达到GB11075－89的三级标准。     

碳酸盐岩煅烧改性处理酸性矿山废水的研究

将碳酸盐岩在不同温度下进行煅烧改性,在保持颗粒机械强度的条件下将其应用于酸性矿山废水(AMD)的处理。结果表明,碳酸盐岩在600℃下煅烧基本不产生变化,当升至750℃时,碳酸盐岩开始分解,煅烧3.0h后,烧失量为1.86%,煅烧后产物仍保持较强颗粒强度。800℃以上煅烧的碳酸盐岩则出现颗粒断裂现象,放入AMD中会立即溶解产生白色沉淀。在750℃煅烧改性后的碳酸盐岩能有效提高AMD的pH,对各种金属离子都有非常好的去除效果,尤其克服了原岩对Mn2+去除效果不佳的缺点;将750℃煅烧改性后的碳酸盐岩应用到野外AMD处理工程中,能有效减少处理构筑物的体积和占地面积,从而降低建设成本。     

The effects of apple pomace,bentonite and calcium superphosphate on swine manure aerobic composting

The effects of additives such as apple pomace, bentonite and calcium superphosphate on swine manure composting were investigated in a self-built aerated static box (90 L) by assessing their influences on the transformation of nitrogen, carbon, phosphorous and compost maturity. The results showed that additives all prolonged the thermophilic stage in composting compared to control. Nitrogen losses amounted to 34–58% of the initial nitrogen, in which ammonia volatilization accounted for 0.3–4.6%. Calcium superphosphate was helpful in facilitating composting process as it significantly reduced the ammonia volatilization during thermophilic stage and increased the contents of total nitrogen and phosphorous in compost, but bentonite increased the ammonia volatilization and reduced the total nitrogen concentration. It suggested that calcium superphosphate is an effective additive for keeping nitrogen during swine manure composting.     

贵州喀斯特地区典型土壤碳酸盐垂直分布特征及其同位素组成研究

以贵州为中心的西南喀斯特地区的石漠化是我国实施西部大开发战略中所面临的根本性地域环境问题之一,喀斯特地区石漠化是一种与脆弱生态背景和人类活动相关联的土地退化过程,而土壤退化是土地退化的核心部分。本研究采集了贵州喀斯特地区的砂岩黄壤剖面和石灰土剖面的土壤样品,测定了剖面样品的土壤有机碳含量、土壤碳酸盐含量和土壤碳酸盐δ~(13)C。结果表明,砂岩黄壤和石灰土碳酸盐含量在剖面上的分布存在差异,黑色石灰土碳酸盐含量在剖面上的总体变化均表现出从上到下逐渐减小的趋势,土壤碳酸盐含量主要集中在表层土壤,而黄色石灰土和砂岩黄壤碳酸盐含量在剖面上的变化不大。而且在砂岩黄壤和石灰土中,土壤碳酸盐δ~(13)C值在剖面深度上的变化情况不同,表明了土壤有机碳向无机碳转化的程度,不同的成土过程及程度和成土环境的差异可能是砂岩黄壤和石灰土中土壤碳酸盐δ~(13)C值组成差异的主要原因。本研究提高了对区域碳库特征的认识,为喀斯特生态系统土壤有机质的生物地球化学循环研究提供了理论支撑。