化聚烯胺在含有石的尾矿中的结构-性能关系:对花效率的洞察力
Steven Nieto1, Eder Piceros2, Gonzalo R Quezada3
1Advanced Mining Technology Center (AMTC), Universidad de Antofagasta, Antofagasta 1240000, Chile.
Polymers
|April 26, 2025
概括
矿山尾矿中的金石通过吸附聚合物来阻碍花,从而产生开放的结构,减缓沉积. 优化花剂剂量和设计是改善水回收的关键.
科学领域:
- 材料科学 材料科学 材料科学
- 合体和表面化学
- 环境工程 环境工程
背景情况:
- 功能性聚合物材料对于优化采矿尾矿中的花和沉积至关重要.
- 聚合物性能是由与矿物表面的复杂相互作用决定的.
- 了解结构-性能关系对于有效的尾矿管理至关重要.
研究的目的:
- 为了研究阴离子聚烯胺 (SNF 704) 在高-石英-金字塔悬浮中的结构-性能关系.
- 阐明聚合物结构 (紧性,多孔性,碎形维度) 如何影响沉积行为.
- 为了确定矿物学,特别是矿含量对花效率的影响.
主要方法:
- 聚焦光束反射测量 (FBRM) 用于分析聚合结构.
- 静态沉试验用于评估沉速度.
- 在pH值10.5的考林-石英-金字塔悬浮物的表征.
主要成果:
- 皮里特显示出最高的积剂吸附能力,导致火车状的聚合物构造.
- 这种形状减少了有效的聚合物桥梁,形成了不那么紧,更多孔的聚合物.
- 增加的矿含量降低了聚合物的碎形尺寸,表明更开放的结构阻碍了整合.
- 高 pyrite 度导致吸附部位和,尽管剂量增加,但限制了花效率.
结论:
- 石的高吸附能力通过改变聚合物结构,对沉积率产生负面影响.
- 优化聚合物剂量和根据矿物学量身定制花剂设计对于改善水回收和可持续性至关重要.
- 结构与财产之间的关系对于开发先进的尾矿管理解决方案至关重要.
相关概念视频
01:09Colloidal precipitates
441
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
441
01:17Precipitation and Co-precipitation
1.6K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.6K
03:45Formation of Complex Ions
23.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.0K
01:17Ion Exchange
395
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
395
01:06Coagulation
249
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
249