Wet Grinding Method For Crude Phosphate Rock

The wet grinding Bond's work index values obtained experimentally for Al- Jalamid rock ranges between 17.75 and 25.92 kwh/ton which compare with the work indices of Florida rock (18.5-20.0 kwh/ton). The work indices obtained for the Umm-Wual sample are in the range of 29.0 to 30.0 kwh/ton.

The yield of phosphoric acid in the ''''wet process'''' synthesis of said acid is improved by adding to the phosphate rock-sulfuric acid reaction medium a small but effective amount of a ''''processing aid,'''' which also serves as a deing agent, comprised of a mixture of (1) an amide of a lower alkanol amine and fatty acid and (2) fatty acid, in specifically defined proportions as ...

Usually, when considering a phosphate rock as a potential raw material, the first approach is to analyze its chemical composition, i.e. the P2O5 content and its impurities. Phosphoric acid (H3PO4) is produced by 2 commercial methods: wet process and thermal process. Wet process phosphoric acid is used in fertilizer production.

For preparation of technical phosphoric acid, the wet process usually consists of the following (EFMA 2000): (a) phosphate rock grinding, (b) sulfuric acid leaching, (c) filtration (to remove calcium sulfate di-hydrate, or phosphogypsum), and (d) concentrating step (produced diluted liquor is concentrated by evaporation to reach 50% w/w P 2 O 5 ...

An economical process for treating the acidic pond water to be used in the internal grinding circuit of a wet process phosphoric acid plant. Water is added to a quantity of a hydratable calcium compound, such as quicklime, to form a slaked lime slurry. A sufficient quantity of the slaked lime slurry is reacted with the acidic pond water to obtain a low fluoride solution having a fluoride ...

11.21 Phosphate Rock Processing - Environmental Protection Agency unit for separating phosphate rock mined in Florida begins with wet screening to ... Consequently, there is no significant emission potential from wet grinding.

Abstract: A method and system for conducting wet grinding of mined phosphate rock before utilizing the same for the production of phosphoric acid by the wet process method, the method comprising the steps of: (1) wet grinding the phosphate rock in a medium of fresh water at a first stage so as to form a fresh water slurry comprising ground rock ...

The wet process production is employed to decompose phosphate rock powder with inorganic acids, separate crude phosphoric acid, and perform the purification to produce phosphoric acid products . The cost of wet process to produce phosphoric acids is 20% - …

This application discloses a method of wet grinding crude phosphate rock containing clay minerals and the like impurities. The procedures of the invention produce a rock slurry of enhanced fluidity and a desired degree of economy; and the principles of the invention …

4.4.. Effect of interfering ionsDespite many impurities are present in crude phosphoric acid, the interference of uranium ions was selected due to: (i) the ores which are used in the preparation of phosphoric acid always contain uranium ions and about 80% of the uranium contained in phosphate minerals is dissolved in the wet production method and the rest remains in the phosphogypsum …

Phosphate rock or phosphorite is a general description applied to several kinds of rock which contain significant concentrations of phosphate minerals. The two main sources for phosphate are guano, formed from droppings, and rocks containing concentrations …

Wet grinding of calcium carbonate is energy intensive. ... Grinding is a necessary process in phosphate rock milling using mechanical methods. The particle size changes due to the mechanical forces and chemical changes in the process reducing the surface free energy of …

I claim: 1. The method of wet grinding crude phosphate rock containing clay minerals or like siliceous impurities, which comprises the steps of: introducing coarsely sized, crude phosphate rock containing clay minerals or the like into a grinding mill with at least about 20% by weight of water; introducing a substantially calcium-free alkaline additive material into the mixture of crude rock ...

Phosphate rock contained in an acidic slurry is ground by equipment wherein the acidic slurry contacts the metallic surfaces of the equipment. A method for monitoring and controlling grinding ball consumption is provided in which acid-neutralizing particulate iron contained in the acidic slurry is measured and correlated to control curves, which relate particulate iron concentration to slurry ...

PM. Another control technique for phosphate rock dryers is use of the wet grinding process. In this process, rock is ground in a wet slurry and then added directly to wet process phosphoric acid reactors without drying. A typical 45 Mg/hr (50 ton/hr) calciner will discharge about 13 to 27 dry normal m3/sec

Current practice for the production of wet-process phosphoric acid (H3PO4) involves leaching beneficiated phosphate rock with aqueous H2SO4. Typical processing involves mining the ore, also called matrix, using a dragline, then forming a water-based slurry to facilitate pumping the ore to a beneficiation plant.

The effect of grinding on the acidulation of phosphate rock. ... grinding in wet operation, with lowest depth of cut (10 µm), minimum table speed (10 m/s) and higher grinding passes (2 passes) are recommended to grind ... First, a test method called taper grinding is developed for efficiently analyzing the effects of grinding process ...

There are two methods of production that can be used in its manufacture. The thermal process is used to produce acid from elemental phosphorous. The acid produced is extremely pure however, it is also expensive. The other process used is the wet process. This process manufactures acid …

Covers crystal growth, nondihydrate processes, material balance calculation methods, filtration, acid concentration systems, rock grinding, fluorine recovery and environmental effects, investment costs, and commercial ore. Demonstrates how commercial phosphate can be applied to present technology an

This invention includes a method that provides for economical grinding of phosphate rock in an acidic slurry wherein iron or mild steel balls are used and the acidic diluting medium used to make up the slurry is obtained, in whole or in part, from waste water produced during the other steps of the wet process manufacture of phosphoric acid.

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Wet Grinding For Phosphate Rock Mine Girnding Mills - Know More. Wet grinding phosphate rock in an acidic slurry Freeport Phosphate rock contained in an acidic slurry is ground by Iron or steel erosion in ball mills used for wet ....

The method of wet grinding crude phosphate rock containing clay minerals or like siliceous impurities, which comprises the steps of: introducing coarsely sized, crude phosphate rock containing clay minerals or the like into a grinding mill with at least about 20% by weight of water; introducing a substantially calcium-free alkaline additive ...

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Wet grinding method for crude phosphate rock: : Loughire: 423/167: 0114693: N/A: : Lewis: 423/167: Primary Examiner: HELLER, GREGORY . Attorney, Agent or Firm: RICHARDS, HARRIS, MEDLOCK & ANDREWS (DALLAS, TX, US) Claims: We claim: 1. A process for treating waste acidic pond water including fluorides and phosphates from the ...

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This application discloses a method of wet grinding crude phosphate rock containing clay minerals and the like impurities. The procedures of the invention produce a rock slurry of enhanced fluidity and a desired degree of economy; and the principles of the invention may be applied to rock slurries after size-reduction. The method of the invention contemplates introducing coarsely sized, crude ...

Wet Grinding Method For Crude Phosphate Rock Cf Grinding of the phosphate rock is performed in order to increase the surface area of the phosphate mineral making it more available to chemical attack by its subsequent contact with sulfuric acid. the extent of size reduction is preferably sufficient such that a majority of the pulverized rock ...

phosphate rock crushing equipment Phosphate Stone Crushing Process. Phosphate Rock Crushers Introduction and Principle. Phosphate rock crushing should follow the more crushing less grinding principle, phosphate ore should be more crushed in the crusher to reduce particle size, so as to achieve the size requirements into the ball mill to minimize the ball mill crushing workload, Give full

Acid produced by the 'wet' route is less pure but is used in the manufacture of fertilizers. (a) Wet process. Phosphoric acid is produced from fluorapatite, known as phosphate rock, 3Ca 3 (PO 4) 2.CaF 2, by the addition of concentrated (93%) sulfuric acid in a series of well-stirred reactors. This results in phosphoric acid and calcium sulfate ...

How To Do Grind Phosphate In Ball Mill ball Mill. How To Do Grind Phosphate In Ball Mill Ball mill grinding of phosphate rock to prepare the phosphate rock for use in the do not exist on the surface of grinding balls and mill liners exposing fresh live chat ball mill wikipedia a ball mill is a type of grinder used to grind blend and sometimes for mixing of materials for use high quality ball ...

The highest energy consuming section in the process is grinding; therefore, processes which can handle coarser rock feeds (e.g. hemihydrate and hemidydrate/dihydrate processes) have gained importance. Grinding efficiency can be increased by using wet grinding (with savings of 30-40 percent in power). Another way to save energy is to integrate ...

Wet grinding method for crude phosphate rock - CF ... I claim: 1. The method of wet grinding crude phosphate rock containing clay minerals or like siliceous impurities, which comprises the steps of: introducing coarsely sized, crude phosphate rock containing clay minerals or the like into a grinding mill with at least about 20% by weight of water; introducing a substantially calcium-free ...