Gravity separation knowledge

Gravity separation is an industrial method of separating two components, either a suspension, or dry granular mixture where separating the components with gravity is sufficiently practical: ie the components of the mixture have different specific weight. All of the gravitational methods are common in the sense that they all use gravity as the dominant force. Gravity separation is used in a wide variety of industries, and can be most simply differentiated by the characteristics of the mixture to be separated - principally that of 'wet' ie - a suspension versus 'dry' -a mixture of granular product. Often other methods are applied to make the separation faster and more efficient, such as flocculation, coagulation and suction. The most notable advantages of the gravitational methods are their cost effectiveness and in some cases excellent reduction.

Gravity separation is Mainly used for processing tungsten ore, tin ore, manganese ore,mercury ore,titanium ore, lead ore, titanium niobium ore, galena ore, celestite, barite, fluorspar, pyritic,limonite,hematite, antimony ore, chrome ore,etc. and can be applified for recovering metal from smelted slags. Gravity separation is the best proven and accepted technique of concentrating iron ore minerals and has been used as a primary form of iron ore mineral concentration for decades. Because of its high efficiency and low cost, gravity separation is always the first consideration in a flowsheet development program and always features in any flowsheet where there is sufficient differences between the specific gravity of the valuable and gangue minerals.

The majority of separators in the oil and gas industry are gravity separator vessels. These have one thing in common; they all rely on the gravity force to achieve separation. By installing internals that ensures good flow distribution and enhanced separation in the gravity section, the gravity separator vessels will perform at high efficiency. Enhanced gravity separation of gas, oil, water and solids results in a maximum overall performance of the separator while its dimensions are minimized.

There are many types of gravity separation process, according to the different of role of theory and use of equipment ,the gravity separation process is divided into: heavy media selection, jig selection, shaking election, chute election, centrifugal election and other processes. We should select different gravity separation process according to the nature of the ore and requirements of the product.