For example, malachite-bearing copper ore can be leached with dilute sulfuric acid. During leaching, malachite is converted into a copper sulfate solution. Copper metal can then be recovered from the solution by cementation, in which iron filings replace copper ions to produce metallic copper, commonly known as sponge copper.<\/p>\n
Chemical beneficiation is particularly effective for processing low-grade, fine-grained, complex, and refractory mineral resources that are difficult to treat using conventional physical beneficiation methods. It can improve resource utilization, recover valuable components from previously uneconomic materials, and contribute to the treatment and utilization of waste streams such as wastewater and waste residues.<\/p>\n
A typical chemical beneficiation process consists of six major operations:<\/strong><\/p>\n The specific process configuration depends on the mineral composition, the properties of the valuable components, and the required product quality.<\/p>\n <\/p>\n L'enrichissement chimique comporte diff\u00e9rentes op\u00e9rations en fonction des diff\u00e9rents processus technologiques. Un processus d'enrichissement chimique typique comprend g\u00e9n\u00e9ralement les six op\u00e9rations primaires suivantes.<\/p>\n <\/p>\n <\/p>\n Cette op\u00e9ration est identique \u00e0 la m\u00e9thode d'enrichissement physique, y compris le concassage et le criblage de mat\u00e9riaux, le broyage et le calibrage, le m\u00e9lange d'ingr\u00e9dients et d'autres processus de traitement m\u00e9canique.<\/strong> The purpose is to grind the material to a specific particle size, prepare suitable fineness and concentration for the next operation, and sometimes use physical beneficiation to remove some harmful impurities or enrich the target minerals in advance so that the mineral raw materials and chemical reagents are mixed well. If the fire method is used, sometimes the material must be dried or sintered to create favorable conditions for the next operation.<\/p>\n The purpose of roasting is to change the chemical composition of the ore or remove harmful impurities so that we can transform the target mineral (component) into a form that is easy to leach or beneficial to physical beneficiation and prepare conditions for the next operation. The roasted products include calcined sand, dry dust, wet dust collection liquid, and mud, from which corresponding methods can recover functional components according to their composition and properties.<\/p>\n Cette op\u00e9ration consiste \u00e0 dissoudre s\u00e9lectivement les composants fonctionnels ou les composants impurs dans le solvant de lixiviation en fonction des propri\u00e9t\u00e9s des mati\u00e8res premi\u00e8res et des exigences du proc\u00e9d\u00e9, de mani\u00e8re \u00e0 s\u00e9parer les composants utiles des composants impurs, ou \u00e0 s\u00e9parer les composants fonctionnels, ce qui constitue l'\u00e9tape suivante. Cr\u00e9er les conditions permettant de r\u00e9cup\u00e9rer les composants utiles de la solution de lixiviation ou du r\u00e9sidu de lixiviation.<\/p>\n This is the same as the dehydration operation of physical beneficiation products, but the solid-liquid separation of chemical beneficiation leached pulp is more complicated. Generally, sedimentation, filtration, and classification are used to process leached ore pulp to obtain a clarified solution or contain a small number of fine mineral particles.<\/p>\n To obtain high-grade chemical concentrates, the leaching solution is often purified and separated by chemical precipitation, ion exchange, or solvent extraction to remove impurities and obtain a purified solution with a high content of valuable components.<\/p>\n Chemical concentrates are obtained by extracting valuable metals (components) from the leaching solution. Generally, chemical precipitation, metal replacement, electrowinning, carbon adsorption, ion exchange, or solvent extraction can be used; in some cases, physical beneficiation can also be used. The principal process of typical chemical beneficiation is as follows.<\/p>\n <\/p>\n <\/p>\n Elle a utilis\u00e9 avec succ\u00e8s l'enrichissement chimique pour traiter de nombreux min\u00e9raux m\u00e9talliques et mati\u00e8res premi\u00e8res min\u00e9rales non m\u00e9talliques, telles que fer<\/a>, mangan\u00e8se<\/a>, plomb, cuivre<\/a>, le zinc, tungst\u00e8ne<\/a>l'aluminium, l'\u00e9tain, l'or<\/a>, argent<\/a>le tantale, le niobium, le cobalt, nickel<\/a>Il est possible d'extraire de l'eau des mines, de l'uranium, du thorium, des terres rares, de l'aluminium, du phosphore, du graphite, du diamant, du kaolin et d'autres mati\u00e8res premi\u00e8res min\u00e9rales solides. Il peut \u00e9galement extraire des composants pr\u00e9cieux de l'eau des mines, des eaux us\u00e9es et de l'eau de mer.<\/p>\n The processing object of characteristic chemical beneficiation is the same as that of physical beneficiation. Still, the adaptability of the chemical beneficiation method is stronger than that of the physical beneficiation method, and its separation principle and product form are different from physical beneficiation. The separation principle of chemical beneficiation is similar to the traditional metallurgical process. Chemical beneficiation and the metallurgical process both use the basic principles of inorganic chemistry, organic chemistry, physical chemistry, and chemical processes to solve their respective process problems. Mineral dressing is widely used in developing various refractory ferrous metals, non-ferrous metals, precious metals, and non-metallic mineral resources.<\/p>\n L'enrichissement chimique est une m\u00e9thode efficace pour traiter les mati\u00e8res premi\u00e8res min\u00e9rales pauvres, fines, diverses et autres mati\u00e8res r\u00e9fractaires et pour recycler les ressources min\u00e9rales inutilis\u00e9es. Son efficacit\u00e9 de s\u00e9paration est sup\u00e9rieure \u00e0 celle de l'enrichissement physique. Cependant, le processus d'enrichissement chimique consomme beaucoup de produits chimiques et les exigences en mati\u00e8re d'\u00e9quipement et de s\u00e9paration solide-liquide sont plus \u00e9lev\u00e9es que celles de l'enrichissement physique. Par cons\u00e9quent, dans des conditions normales, il convient d'utiliser les m\u00e9thodes d'enrichissement physique existantes pour traiter les mati\u00e8res premi\u00e8res min\u00e9rales autant que possible.<\/p>\n Quand faut-il envisager l'utilisation d'un proc\u00e9d\u00e9 d'enrichissement chimique ?<\/strong><\/p>\n <\/p>\n Chemical beneficiation should generally be considered under the following conditions:\n
Processus d'am\u00e9lioration chimique<\/h2>\n
![\"\"](\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/02\/Chemical-Beneficiation-Process.jpg\")
<\/a><\/h2>\n1. Preparatory Work<\/h3>\n
2. Roasting Operation<\/h3>\n
3. Leaching Operation<\/h3>\n
4. Solid-liquid Separation Operation<\/h3>\n
5. Purification Work<\/h3>\n
6. Production of Chemical Concentrates<\/h3>\n
<\/a><\/p>\n\n
When Should Chemical Beneficiation Be Considered?<\/h2>\n
\n1. Physical Beneficiation Alone Is Ineffective<\/strong>
\nWhen valuable minerals are extremely fine-grained, closely associated with gangue, disseminated, or chemically similar to the surrounding minerals, conventional physical beneficiation may not achieve satisfactory separation.
\n2. Physical Beneficiation Cannot Achieve Reasonable Technical and Economic Indicators
\n<\/strong>If physical beneficiation cannot provide acceptable recovery, concentrate grade, or economic performance, chemical treatment may provide an alternative or supplementary solution.
\n3. Valuable Components Occur in Complex or Refractory Forms<\/strong>
\nChemical beneficiation is particularly suitable when valuable components occur in forms that are difficult to recover through conventional gravity, magnetic, flotation, or other physical methods.<\/p>\n