Phosphate beneficiation process and methods

Beneficiation of phosphate rock flotation method. Phosphate rock phosphate beneficiation process of secondary fragmentation process, phosphate rock crushing to grinding requirements granularity into the ball mill grinding operations, reaching a particle size into the spiral classifier desciros, dehydration treatment. Into the flotation machine for a roughing operation, the four selected operations in a scavenger job. After selection of the phosphate rock concentrate, filtration, drying and dust removal operations, and finally finished phosphate concentrate.

Phosphate flotation machine

Flotation has been considered the most effective way of phosphate beneficiation. The flotation of phosphate rock, including direct flotation, reverse flotation, pros and cons of flotation, anyway, flotation and double reverse flotation process. In 1986, Hubei Xiangyang Wang set the completion of the concentrator of 1.5 million t / a sedimentary phosphate rock using flotation election in other collophane, but industrial production is not very satisfactory, especially in a higher content of MgO Al203 and Fe203 phosphate beneficiation, it is difficult to achieve the desired targets. According the Wengfu a collophane the nature of the anti-flotation process, combined with a new type of phosphate inhibitor, in the grade of ore P205 27.33% MgO 6.19% of the case, 37.34% of the P205 grade, MgO0.73 %. Recovery of 92.39% of the phosphate concentrate.

Phosphate rock calcination methods have also been developed. The calcination can be carried out in a shaft furnace, converter, and boiling furnace, like the latter should be classified as the most advanced of the roaster, so phosphate concentrator such as the United States, Morocco and Al Elijah, but into the furnace raw material particle size requirements fine. In order to save fuel and access to the products of crude ore, sometimes roasting is only part of the phosphate, and developed a part of the calcined phosphate products, such as the Israeli Negev phosphate company can save about 70% of the energy.

Phosphate calcination process

In the roasting of the new technology, such as France FCB developed the "flashing roasting, only 3 seconds to complete the roasting process. The low-temperature calcination of phosphate rock, as early as the United States for sorting the western phosphate, the Chinese Tiantai Mountain phosphate have also tested the methods. Calcined phosphate rock in the decomposition of carbonate minerals need to consume large amounts of heat, which is also the case with the species of the carbonate minerals and containing the amount of other impurities.

For example, the type of phosphate rock containing pyrite, carbonate, calcination temperature of only 650 ° C, but can also use the heat generated by the phosphate rock, pyrite roasting process, consumes 50% of the calories required to compensate for the roasting or more. In addition, calcium, magnesium oxide produced in the roasting process is generally based on a digest washing method or air classification to remove all remove their purpose in order to reach in recent years to try to apply a pickling method . Accompanied by phosphate rock calcination process, phosphate rock composed of minerals must change accordingly, has confirmed the floatability changes are not consistent: such as phosphate things changed for the better floating; quartz, floating unchanged; carbonate minerals deterioration Flotability. This has naturally conducive to flotation separation.

Preparation of phosphate rock media. This process includes the massive increase the quality of raw materials in specialized crusher and mill crushing, which have reached the required size requirements, and then in the mixing tank, add water to deploy a certain concentration of suspension some of our heavy media concentrator with the nature of the re-suspension in the table below.

Mineral processing equipment used for phosphate

The separation of the phosphate rock. Sorting equipment, light and heavy mineral separation, which is the central link of the re-suspension of mineral processing operation should be kept mainly to the stability of the ore, and control the density of the suspension changed less the scope of the latter fluctuations should not exceed this end, the need for frequent sampling measurement or the installation of self-control devices.

Regeneration of phosphate rock medium. Dilute medium to purify and improve the regeneration of the concentration of operations called the media. Regeneration can be used according to increase the qualitative nature of the different magnetic separation. Flotation or re-election method. Purified dilute suspension again Hydrocyclone. tilted thick boxes and other equipment to dehydration, and concentrated. get so increase the quality of purification of the suspension can supplement mixed deployment into the appropriate concentration to return to the process.

Phosphate rock beneficiation technology uses two stages or three desciros concentrator general practice in the United States and the Soviet Union, such as the Soviet Kara sets, Jinjixiepu phosphate ore dressing plant, and the United States Florida phosphate ore dressing plant. Others such as India, *, Syria, Senegal, Togo, Jordan, Iraq and other countries are actively developing its own in low-grade phosphate beds. China Yunnan Dianchi Lake near the surface weathering of phosphate rock, is also widely used in the multi-stage scrubbing off the mud flow processing.

For example, over the past decade, Brazil in the development of national P2O5 content 10% to 15%, and containing large amounts of carbonate gangue minerals disseminated fine particle size apatite deposits has been successful; Finland in the development and utilization of their P2O5 The content below 5%, low-grade apatite deposits has also attracted the attention of the world.

Phosphate mineral processing equipment used in many countries around the world

In order to save fuel and access to crude ore products, and sometimes the only department phosphate roasting, and developed a system of sand production line of a sectoral calcined phosphate products such as the Israeli Negev phosphate, which can save about 70% of the energy . In recent years, optical sorting and heavy media separation of the phosphate rock are also beginning to be addressed.

These trials the results of research and industrial experience, not only promoted the development of the world's phosphate fertilizer industry, and worldwide to promote the phosphate beneficiation process technology improvements, innovation and progress. For example, the type of phosphate rock containing pyrite, carbonate, calcination temperature of only 650 ° C, but can also use the heat generated by the phosphate rock, pyrite roasting process, consumes 50% of the calories required to compensate for the roasting or more.

Phosphate dominated the election phosphate equipment in the world phosphate rock beneficiation practice, the selected device # of phosphate rock beneficiation technology, or scrub off the mud, flotation and roasting.

Phosphate rock beneficiation equipment suppliers

In addition, calcium, magnesium oxide produced in the roasting process is generally based on a digest washing method or air classification to remove all remove their purpose in order to reach in recent years to try to apply a pickling method . The low-temperature calcination of phosphate rock, as early as the United States for sorting the western phosphate, the Chinese Tiantai Mountain phosphate have also tested the methods. The calcination can be carried out in a shaft furnace, converter, and boiling furnace, like the latter should be classified as to improve the predecessors of the roaster, so the phosphate concentrator such as the United States, Morocco and Al Elijah, but into the furnace raw material particle size requirements fine.

From a global perspective, the annual production of phosphate rock of goods reached $ 150 million tons, and increasing year by year. Even if the Soviet Union, the United States and other phosphate resources rich countries, but also very face of this national calamity ores enrichment topics. Roasting process carried out along with the phosphate rock, phosphate rock constituent minerals must change accordingly, has proved to the floatability changes are not the same: such as phosphate things changed for the better floating; quartz, floating unchanged; carbonate minerals deterioration Flotability.

Phosphate rock beneficiation methods and equipment

Such as the Soviet Union and its karaoke sets the beneficiation of phosphate rock, the South Florida phosphate - dolomite ore and western silicon calcium phosphate rock beneficiation test research. Calcined phosphate rock in the decomposition of carbonate minerals need to consume large amounts of heat, which is also the case with the species of the carbonate minerals and containing the amount of other impurities. In the roasting of the new technology, such as France FCB developed the "flashing roasting, only 3 seconds to complete the roasting process. Bonanza and easy to choose other phosphate resources will become increasingly reduced, low-grade refractory enrichment of phosphate rock drying equipment has been generally face up to.