Collector overview

Where it can be selectively applied to the surface of the mineral so that the mineral surface hydrophobic organic substances, known as collectors. Domestic naming of collectors often ends with the word "medicine" (yellow medicine, black medicine, etc.). As much organic compound collector, commonly used in practice, such as oleic acid yellow, oil and coal. As an industrially applicable excellent collector, the following requirements should be met:
(1) Wide source of raw materials, easy to prepare;
(2) low price, easy to use, that is, soluble in water, odorless, non-toxic, stable in composition, not easy to deteriorate, etc.;
(3) The fishing effect is strong and has sufficient activity;
(4) It has high selectivity, and it is better to have only one mineral.
According to the molecular structure of the collector, the collector can be classified into three types: an isopolar collector, a non-polar oil collector, and an amphoteric collector.
The heteropolar collector is an isopolar substance. Common heteropolar agents such as xanthate ( R , OCSSNa ), fatty acid ( R- COOH ) amines ( R - NH ₂ ), etc. The molecules of this type of collector are composed of a polar group ( -OCSSNa , -COOH , -NH ₂ ) and a non-polar group ( R- ). Not all of the polar valences in the polar groups are saturated, and thus have residual affinities which determine the activity of the polar groups. When it acts on the mineral surface, it is fixed on the surface of the mineral, so it is also called a hydrophilic group. In the non-polar group, all the valences are saturated, and therefore, they have a very low chemical activity, are not wetted by water, and are not easily reacted with other compounds, and are hydrophobic to the surface of the mineral. Figure 1 shows the relationship between the yellow drug molecule ( R-OCSSNa ) and the mineral surface with a match diagram :

Figure 1 Schematic diagram of the action of xanthate molecules and mineral surfaces

Â Â Â Since the xanthate molecule selectively adsorbs or chemically fixes on the mineral surface, it has a certain orientation, that is, a polar group is oriented toward the mineral, and a non-polar group is oriented toward the water, thereby forming a hydrophobic film on the surface of the mineral.
Heteropolar collectors are classified into ionic and nonionic collectors (eg, polysulfides) depending on whether they are dissociable into ions. The ionic collector is further classified into an anionic collector and a cation collector according to the electrical properties of the ions that are trapped.

Figure 2 Classification of collectors

Another major class of collectors is a non-polar oil collector with a chemical formula of

R â€” H , for example, kerosene, transformer oil, etc. Due to the strong covalent bond between the atoms in the oil collector, the non-polar minerals which are weakly molecularly bonded to the outside are easily attached to the non-polar minerals which are also weakly molecularly bonded on the surface. Such as: graphite , copper and other minerals on the surface. The interaction between non-polar kerosene molecules and highly polar water molecules is weak, so it exhibits hydrophobicity.
In addition to polar collectors and non-polar oil collectors, there are also amphiphilic collectors. The classification of collectors is shown in Figure 2 .

Check Fixture Mould

Inspection Tool Mould Year,Inspection Tool Moulding,Inspection Tool Mould Paint,Inspection Tool Mould Steel

Kunshan Wangdaxin Precision Mould Co., Ltd. , https://www.wdxmould.com