响应面曲线法优化贵州某磷块岩浮选工艺研究

对贵州某沉积钙质磷块岩进行了浮选工艺研究。采用H₂SO₄为氟磷灰石抑制剂、BW-1为白云石捕收剂,进行了浮选单因素试验; 在此基础上进行了正交试验,并采用响应面曲线法进行了浮选条件优化。确定了最佳浮选条件为: 磨矿细度-0.074 mm粒级占60%、H₂SO₄用量13.20 kg/t和BW-1用量400 g/t。采用一段反浮选试验流程,可得到精矿品位30.94%、回收率92.45%的磷精矿。研究结果表明,磨矿细度与H₂SO₄用量的交互作用对精矿品位影响显著,H₂SO₄用量和BW-1用量的交互作用对精矿回收率影响显著。     

三元复合驱采出水处理研究进展

随着三元复合驱采油技术在油田的广泛应用，三元复合驱采出水产量不断增加。三元复合驱采出水水质复杂，具有矿化度高、黏度大、含油乳化程度高、小油滴含量高、油水分离困难等特点，对油田生产和环境的影响日益严重。因此，开展三元复合驱采出水高效处理方法的研究成为一项重要的任务。本文分析了影响三元复合驱采出水油水分离特性的各种因素，介绍了目前国内应用于三元采出水处理的先进技术，如膜分离法、气浮选分离法、高级氧化法、微生物法等，阐述了这些处理技术的优势及存在的问题，重点介绍了气浮选分离法和微生物法在三元采出水处理中的应用情况，并对大庆油田三元复合驱采出水现场处理工艺进行了介绍，最后对今后的研究工作提出了一些展望。     

采用酯类捕收剂PZA提高铜、银回收率的选矿试验研究

在某硫化铜矿浮选过程中,进行了酯类捕收剂PZA与丁基黄药、丁基铵黑药、Z200等对比研究,发现PZA对铜、银具有良好的选择性,与丁基黄药组合效果更佳。原矿铜、银品位分别为0.28%和8.50g/t情况下,采用铜硫混合浮选—铜硫分离工艺流程,最终获得了铜精矿Cu品位21.58%、回收率83.94%,Ag品位500.10g/t、回收率62.99%的技术指标,较好的实现了银在铜精矿的定向富集。     

广西某黄铁矿化蚀变砂泥岩型金矿选矿试验研究

广西某金矿为黄铁矿化蚀变砂泥岩型金矿,可回收金主要为黄铁矿、脉石包裹金。金矿物绝大部分为次显微金、胶体金及晶格金,呈均匀分布,极难单体解离,因此金矿物较难富集。试验研究结果表明,采用浮选—尼尔森联合工艺获得金粗精矿金品位为5.82g/t,金回收率为88.85%,较单一浮选工艺粗选金回收率提高5.19%;闭路试验结果表明,采用浮选—尼尔森联合工艺可获得金品位为12.53g/t、金回收率为88.48%的金精矿,较好地实现了该金矿的综合回收。     

Effect of ultrasound on the true flotation of lignite and its entrainment behavior

In this study, the ultrasound was fixed in the pulp zone of flotation cell and its effect on the true flotation of lignite was analyzed. Flotation results indicated that the simultaneous ultrasound treatment increased the concentrate yield and decreased the concentrate ash content. Screening analysis of flotation products revealed that the ultrasound could crush coarse coal to fine coal and scanning electron microscopy (SEM) tests indicated that the ultrasound could reduce the coverage of high-ash coal fines on the coarse particle surface. Thus, the flotation recovery of coarse lignite particle was increased. In addition, the true flotation and entrainment of ?0.074 mm fine particles were studied by the sink-float test and the method of Trahar. It was found the ultrasound significantly enhanced the true flotation of fine particles and improved the overall water recovery in lignite flotation.     

贵州某高硫铝土矿浮选脱硫试验研究

对贵州某高硫铝土矿进行了浮选脱硫试验研究。结果表明, 在磨矿细度-0.074 mm粒级占82.64%, 碳酸钠用量1 800 g/t、硫酸铜用量150 g/t、丁黄药总用量600 g/t、2^#油总用量240 g/t条件下, 经一粗两精两扫闭路反浮选, 获得了硫含量0.26%的铝土矿精矿, 脱硫率达到85.86%。试验结果可为该类铝土矿资源的综合开发利用提供借鉴。     

Research on the reverse flotation of kaolinite from fine coal on basis of adsorption behavior

The strong hydrophilic properties of both sub-bituminous coal and kaolinite make it difficult to separate by direct flotation. In this paper, the removal of kaolinite from fine sub-bituminous coal was investigated by reverse flotation tests using N, N-dimethyl dodecyl amine (DRN₁₂) as a kaolinite collector. In addition, the adsorption behavior of DRN₁₂ on coal and kaolinite surfaces was also studied to explore its interaction mechanism The experimental results showed that the beneficiation of kaolinite from the raw coal was effective only in the acid pulp with DRN₁₂ less than 1.5kg/t. Moreover, in acid solutions, DRN₁₂ preferentially adsorbs on kaolinite surface by electrostatic force, and the adsorption capacity of DRN₁₂ on kaolinite surface was much higher than on coal, which caused an increase of kaolinite hydrophobicity and floatability.     

某烧绿石尾矿选铌试验研究

国外某地含有丰富的烧绿石资源，属碱性碳酸盐矿体，原矿Nb2O5含量大于1%，在经历长流程胺法烧绿石浮选之后，尾矿含Nb2O5较高，铌资源未能得到综合回收，该烧绿石尾矿仍具有较高的回收价值。由于该尾矿长期在尾矿库堆存，药剂污染严重、含泥量较大，本工艺预先采用“磨矿擦洗-脱泥”的工艺改善其浮选性质，然后通过“磁选-脱钙”的工艺进行杂质矿物抛废，最终采用螯合类组合捕收剂实现烧绿石的选择性高效捕收。在原料Nb2O5品位0.71%的条件下，获得了Nb2O5品位55.07%、回收率38.23%的烧绿石精矿，尾矿中烧绿石资源得到回收。     

某铜矿浮选药剂用量优化及技术应用探讨

湖北某铜矿浮选在常规加药条件下，前两槽不能有效形成泡沫层，浮选液面经常出现“翻花”现象，以致选矿指标波动大，起泡剂用量大幅上升，因此开展了浮选试验研究。试验结果表明，在总药量不变的情况下，适当降低粗选捕收剂用量，使有用矿物有序上浮，有效改善了浮选泡沫层的稳定性。在生产现场应用后，浮选现场泡沫稳定，层次感分明，彻底解决了浮选前两槽不起泡、翻花等问题，选铜回收率提高0.69%，起泡剂单耗降低18g/t，取得较好的应用效果。     

Characterization of Glass Beads Surface Modified with Ionic Surfactants

Knowledge of the wetting characteristic of mineral surfaces is very important in enhancing the efficiency of separation of valuable minerals from gangue using froth flotation or oil agglomeration. In this paper a capillary rise technique was used to characterize the glass beads surface modified with cationic surfactant. The glass microspheres were used as model particles with a spherical shape and smooth surface to eliminate the roughness effect. The value of the contact angle for water was found to be 21.5 for unmodified beads, and 61.8, 89.7, 68.4 for 0.1, 1.0, 10 mg/g_solid of CTAB, and 39.8, 68.6, 87.9 for 0.1, 1.0, 10 mg/g_solid of DDAHCl, respectively. Data revealed that the adsorption of surfactant onto glass beads decreased the value of the electron donor component, γ-, which defines the hydrophobicity of the surface. Also, the property of the surface was investigated by flotation and oil agglomeration experiments. It was observed that particles with low value of contact angle for water and high for 1-bromonaphthalene and low value of γ- were floated with a recovery equal to 91.1 and 83.1% for CTAB and DDAHCl, respectively, and effectively agglomerated. This indicates that the capillary rise method can be successfully used to predict the wetting properties of solid particles in mineral processing.