The relationship between the concept of mineral processing chemicals and mineral processing
The concept of mineral processing pharmacy and its relationship with mineral processing. In the process of selection, the chemical additives added to improve the efficiency of the operation are collectively referred to as mineral processing chemicals.
As for the mineral processing workers, the ore dressing process consists of three parts: the pre-selection meteorite preparation operation, the sorting operation, and the post-selection dewatering operation.
The purpose of the preparation before the preparation is to achieve the dissociation of the useful minerals and gangue minerals. It consists of crushing and sieving and grinding and grading operations. Because the degree of dissociation of useful minerals and gangue minerals directly affects the sorting index, the capital and energy consumption of the crushing and grinding equipment of the concentrator account for more than half of the whole plant, so how to improve the grinding efficiency It is of great significance to improve mineral processing indicators, save energy and reduce costs. Among the many measures taken, the use of chemical additives to assist grinding can achieve the purpose of improving grinding efficiency. We call this chemical additive a grinding aid.
The sorting operation can be composed of different beneficiation methods. The main mechanical beneficiation methods include flotation, re-election, magnetic separation, and electric selection. Among them, the application of the drug is the earliest, and the most important thing is the capture. The so-called flotation is the use of the difference in mineral hydrophobicity to separate the foam product from the pulp to achieve the separation and enrichment of useful minerals and gangue minerals. Because there are very few natural and hydrophobic impurities in nature, the difference in hydrophobicity of different minerals depends entirely on different agents. In the flotation process, various agents used to change the physicochemical properties of the mineral surface are collectively referred to as flotation reagents. It includes a wide range of pharmaceutical agents, including foaming agents and conditioning agents. The application of these agents is currently not completely limited to the flotation method. For example, magnetic separation, this is the use of mineral differences to select, but for the fine particles, in order to improve the selection effect, pre-dispersant treatment is added to ensure the full looseness of the ore particles and improve the selectivity of magnetic separation.
The purpose of dewatering is to remove moisture from the products obtained from wet beneficiation to facilitate transportation and subsequent sintering and smelting. It includes three stages of concentration, filtration and drying. For fine and mud slurry, it is very difficult to remove water. Fine concentrate is easily lost from concentrated and filtered overflow water, resulting in waste of resources and environmental pollution. Adding chemical additives to the concentrated filtration process is one of the powerful measures to change this situation. Through the action of the medicament, it can help to improve the efficiency of concentration and filtration, and reduce the moisture of the dehydrated product. The agent added to help the particles flocculate and settle during the concentration process is called a coagulant. The agent added in the filtration process to increase the filtration speed and reduce the moisture of the filter cake is called a filter aid. Sometimes it is customary to refer to these two additives as filter aids or dewatering aids.
As can be seen from the above, the application of the medicament is not limited to the conventional process, and it is limited to various processes of beneficiation and beneficiation in the flotation process.
This development process is due to the diminishing reduction of rich ore in the natural world, the increasing number of poor and fine mines with difficult symbiotic relationships, which make the various processes of mineral processing difficult. At the same time, in order to recover the useful components in the industrial waste residue, the raw materials for beneficiation are more complex and diverse, such as high hardness steelmaking slag. When the ore dressing is used for wastewater treatment, the particle size of the treated material is finer, making solid-liquid separation more difficult. Many of the drugs that have emerged to solve these problems are not in the flotation operation.
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