wet grinding phosphate rock in an acidic slurry

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 and fresh water, (2) sending the fresh …

Hemihydrate slurry is filtered on a Prayon tilting pan filter to recover the phosphoric acid. Depending on the rock processed, the ex-filter acid strength is typically 40-42% P 2 O 5 and the typical P 2 O 5 recovery efficiency is 92-94%.

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 the steam production units with the sulfuric acid plants. ... Purifying wet-process phosphoric acid. Depending on the phosphate rock, wet process phosphoric acid may contain a variety of impurities ...

Phosphate rock of 70 to 75% BPL, or as high as is reasonably obtainable, is finely ground in a ball mill and then mixed with cooled recycled phosphoric acid-gypsum slurry in a digestion tank (Figs. 10.3 and 10.4).

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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 …

I claim: 1. A method of manufacturing wet process phosphoric acid from phosphate rock, comprising the steps of . i. grinding the phosphate rock in a water slurry sufficiently that the phosphate rock will pass a 30 mesh (Tyler) screen, said slurry containing at least about 20 weight percent water, and said slurry being formed with water containing no more than 2 …

Dihydrate slurry is filtered on a Prayon tilting pan filter to recover the phosphoric acid. Depending on the rock processed, the ex-filter acid strength is typically 25-29% P 2 O 5 and the typical P 2 O 5 recovery efficiency is 94-95%.

The phosphate fertilizer industry is defined as eight separate processes: phosphate rock grinding, wet process phosphoric acid, phosphoric acid concentration, phosphoric acid clarification, normal superphosphate, triple superphosphate, ammonium phosphate, and sulfuric acid.Practically all phosphate manufacturers combine the various …

Wet Phosphate Rock Ball Mill Operation, This glass ball is the exact size of the plutonium core in the bomb that destroyed, wet grinding and dry grinding . Patent US4577804 Wet grinding phosphate rock in an,, of wet grinding over dry, of pond water in wet phosphate rock grinding operations by allowing the, phosphate rock fed to the.

A study of erosion-corrosion of grinding media during the grinding of Florida phosphate rock with recycled waste phosphoric acid showed some characteristics of the two ball mills. This slurry was quite acidic, ranging from an initial pH of 2 to a final pH of 3 after the 1-h test. Erosion-corrosion wear data on four alloys are given in table 7.

Concentrated Phosphoric Acid: 700 TPD P2O5 – Concentration of Concentrated acid 50-24% P2O5. It is the main raw material of phosphate fertilizer production. STEAM Phosphate preparation unit consists of 3 main processes: crushing, grinding and thickening. The raw phosphate rock is (19-20% P2O5) crushing to the desired sizing. Sized ...

Grinding Rock Of Phosphate. USA Wet grinding phosphate rock in an acidic. 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 acidneutralizing particulate iron contained in the acidic …

Wet grinding Phosphate rock in an acidic slurry; Function. The effect of Phosphate Rock on Arsenic uptake in a multi-metal system. Bioactivation of Poorly Soluble Phosphate Rocks with a Phosphorus-Solubilizing Fungus; Effects of Phosphate Rock on Sequential Chemical Extraction of Lead in Contaminated Soils

The present method of wet phosphate rock grinding results in a phosphate slurry of about 65% solids and 35% water. With this increased water quantity to the phosphoric acid plant, the water balance problem even for present low filtrate phosphoric acid concentrations of 26-27% P 2 O 5 becomes extremely more difficult.

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 …

For example, a new Swenson phosphoric acid concentration unit was installed in 2004. The dihydrate process offers several advantages: it can be used with all types of phosphates (sedimentary or igneous); phosphate can be supplied in slurry form (wet grinding); it is easy to control the water balance (recycle pond water, reduction/elimination of ...

Uganda How To Do Grind Phosphate In Ball Mill. System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo.ToTitleCase(Phosphorus Mineral Grinding Mill Uganda 720td Phosphorus Mineral Processing Plant Grinding onestage closedcircuit grinding process comprising ball mill pump and classifi ion cyclone process of …

THE GRINdING ROCK ANd PETROGLyPHS Chaw'se is the Miwok word for the mortar cups that formed in a stone slab as the Miwok people pounded acorns and other seed into meal. The largest example can still be seen today. The main grinding rock also features 363 petroglyphs—including circles, animal and human tracks, and wavy lines.

US4577804AWet grinding phosphate rock in an acidic . 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 ...

Muhammad Sajid, UOG 5 WET PROCESS • RAW MATERIALS Basis: 1000kg phosphoric acid () Phosphate rock = 1635kg Sulfuric acid = 1360kg Engr. Muhammad Sajid, UOG 6 WET PROCESS Engr. Muhammad Sajid, UOG 7 WET PROCESS • Wet process is by far the most common route and the acid can be used in phosphate fertilizers production (DAP, MAP, SPA).

A two-stage process for treating acidic gypsum pond water for reuse or for discharge is disclosed. The first stage blends raw acidic pond water with recycled lime-treated slurry from the second stage of the process. The resulting elevation in pH causes CaF 2 and SiO 2 to precipitate and the precipitated material is discarded onto the gypsum storage area.

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 …

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

An improved method for the wet process manufacture of concentrated phosphoric acid is disclosed herein. A mixture of gaseous sulfur trioxide and sulfuric acid now replaces concentrated sulfuric acid as a process reactant which results in a higher heat of reaction and the ability to evaporate out of the reaction slurry increased inputs of water.

Abstract: A wet phosphoric acid production process comprising the attack on phosphate rock by sulfuric acid and phosphoric acid utilizing a vacuum cooling and a recirculation of the reaction slurry. The flow rates of the materials within the system are maintained at a level, relative to the rate of withdrawal of the slurry from the system, of between 300% and 4000% for the cyclic …

Grinding containers with volumes of 0.15l or 0.3l can be used for processing highly fluid suspensions in applicati-on sizes of 85ml or 170ml respectively. The product must be separated after grinding by sieving. This grinding principle is used in particular for cell disruption in microbiology and for processing pharma-ceutical active ingredients.

According to the U.S. Bureau of Mines, nearly 93% of the phosphate rock sold or used by U.S. producers in 1991 was for the manufacture of wet-process phosphoric acid, single. Get Price; gringing mill for rock phosphate [randpic] vertical ball mill rock phosphate proves-projekt.de. Ball Mill For Phosphate Rock.

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

When making the slurry, waste water from other steps of the wet process manufacture of phosphoric acid can be used as part of an acidic diluting medium. Phosphate rock contained in an acidic slurry...