The enhanced effect of MnO 4-and Fe 3+ on SO 2 removal is clarified clearly.. Under optimal conditions 100 % SO 2 absorption rate of the slurry reaches 3.5 h.. The maximum concentration of phosphate ions in the slurry is 3177.04 mg/L. • SO 2 absorption barrier is reduced to 72.19 kJ/mol when using the composite slurry.. An enhanced one-step …
Samples and sample preparation. The phosphate slurry samples used in this study had a solid content between 50 and 55%, a particle size between 160 and 315 µm, a density of 1.47 g/ml, a P 2 O 5 content between 13.5% and 18.5%, a CaO content between 23 and 27%, a SiO 2 content between 3 and 7%, and an F content between 1.5 …
Phosphate rock extraction from its ore, and its subsequent conversion into fertilizer materials and industrial chemicals, is a relatively mature art. ... In the wet process, phosphate rock is reacted in a slurry of phosphoric acid and calcium sulfate crystals containing a controlled quantity of sulfuric acid. The simplified reaction for the ...
Phosphate ore slurry is a suspension of insoluble particles of phosphate rock, the primary raw material for fertilizer and phosphoric acid, in a continuous phase of water. This suspension has a non-Newtonian flow behavior and exhibits yield stress as …
This research aims to explore how the flotation process conditions influence the rheological properties of phosphate rock slurry. The apparent viscosity of …
express the phosphate content of rock as tricalcium phosphate ( P2O5 53.1×82 = BPL). Samples and sample preparation ˜e phosphate slurry samples used in this study had a solid content between 50 ...
Abstract. Phosphate rock (PR) is an important mineral resource with numerous uses and applications in agriculture and the environment. PR is used in the manufacture of detergents, animal feed, and ...
Wet flue gas desulfurization is now a widely used method for SO 2 abatement, but an efficient adsorbent with low cost is recognized as being an important prerequisite for its industrial application. Herein, wet flue gas phosphate rock desulfurization technology is reported to eliminate SO 2 from phosphorus chemical processes, and the technology …
A method for production of ammonium phosphate from phosphate rock slurry. The method includes: introducing flue gas containing SO 2 into a phosphate rock slurry, to yield an absorption solution; evaporating waste ammonia water containing 10-20 wt. % ammonia to yield ammonia gas; introducing the ammonia gas into the absorption …
Rock phosphate application is more suitable with bagasse ash for wheat (C3 plants) while for maize crop (C4 plants), rock P application is more suitable with biogas slurry with 75% dose of rock P. It is concluded that the efficient use of organic wastes is to apply with rock phosphate.
Solids handling or slurry pumps may be used at the beginning of the process to handle the phosphate rock in hydro transport or in the initial ball mill circuits for sizing the rock. These pumps handle a concentration of 40-55% solids by weight where abrasion and erosion wear are the primary concern. Particle size, hardness, shape, specific
Composition analysis of phosphate rock Table S1. XRF analysis of the phosphate rock Element P Ca Si Fe Al Mn Fresh phosphate rock (%) 10.66 45.83 3.036 1.07 0.79 0.22 The chemical composition of the phosphate rock were characterized by XRF, and the results are listed in Table S1. The analysis indicates clearly the source of the metal
The phosphate rock and the sulfuric acid may be fed to the reactor such that two streams contact each other directly to produce conditions where the product of SO 4 −2 and Ca +2 ion ... The purpose of the acidulation reactors is to digest the phosphate rock by exposing it to a slurry with optimum levels of sulfate ion and sulfuric acid ...
Phosphogypsum (PG) is a major industrial by-product of wet process phosphoric acid production, and untreated PG stockpiled on land will cause severe environmental pollution.Thermal treatment of PG is currently the mainstream treatment method PG can be thermally decomposed to produce CaO, and the decomposition …
Herein, we first report a novel process on simultaneous eliminating SO2 and NOx at low temperature, by employing large scale and cheap sources of phosphorus sludge and phosphate rock slurry.
The dragline then digs out the ore-bearing layer (known as the matrix), which consists of about equal parts phosphate rock, clay and sand. Matrix material is then dumped in a pit where high-pressure water guns create a slurry that can then be pumped to the beneficiation plant, which can be several miles away.
the phosphate rock slurry was pumped into the absorption tower through the circulation pump and contacted the flue gas to yield an absorption solution. the concentration of SO 2 at the outlet of the absorption tower was measured. the …
phosphate rock mined from other reserves contains organics and must be heated to 760 to 870°C (1400 to 1600°F) to remove them. Fluidized-bed calciners are most commonly used for this purpose, ... 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 ...
The phosphate rock powders were mixed with distilled water in a surge tank to yield phosphate rock slurry; the solid content of the phosphate rock slurry was 55%. The pH value of the phosphate rock slurry was 5.8. The phosphate rock slurry was guided out of the surge tank and transferred through a slurry pump to a circulation pump.
Phosphate rock normally is used as a dry rock or in slurry form. However, in some cases, particularly where the raw phosphate is high in carbonaceous matter or …
It was in 1881 that Captain J. Francis LeBaron, of the Army Corps of Engineers, discovered Florida's treasure in black phosphate pebbles in the Peace River. A "hard rock" phosphate reserve in North Central Florida was discovered next. Thus began Florida's phosphate mining industry. Florida's phosphate mining today accounts for about ...
The phosphate slurry samples were prepared in a laboratory based on dry phosphate ore provided by an international fertilizer producer. Six samples were …
Wet flue gas desulfurization is now a widely used method for SO 2 abatement, but an efficient adsorbent with low cost is recognized as being an important prerequisite for its industrial application. Herein, wet flue gas phosphate rock desulfurization technology is reported to eliminate SO 2 from phosphorus chemical …
DOI: 10.1021/ACS.IECR.8B03223 Corpus ID: 105111035; Efficient Removal of SO2 from Flue Gas with Phosphate Rock Slurry and Investigation of Reaction …
DOI: 10.1021/ACS.IECR.8B03223 Corpus ID: 105111035; Efficient Removal of SO2 from Flue Gas with Phosphate Rock Slurry and Investigation of Reaction Mechanism @article{Nie2018EfficientRO, title={Efficient Removal of SO2 from Flue Gas with Phosphate Rock Slurry and Investigation of Reaction Mechanism}, …
The absorbent composed of P 4 and phosphate rock slurry demonstrates good performance for NO x removal, which has been proved in our previous study [20].Herein, the variation of denitrification efficiency and pH value of the slurry with time on stream were investigated, under the suitable experimental conditions: NO x …
Phosphate ore slurry is a suspension of insoluble particles of phosphate rock, the primary raw material for fertilizer and phosphoric acid, in a continuous phase of water. This suspension has a non-Newtonian flow behavior and exhibits yield stress as the shear rate tends toward zero. The suspended particles in the present study were …
Phosphate Ore Once the phosphate rock slurry is received in Rock Springs, it is concentrated by removing a large portion of the water. As the phosphate rock is thickened it is prepared for the next phase of processing. Sulfuric AcidMolten Sulfur is burned to provide three products: SO2 gas, heat and steam. Sulfur Dioxide gas is oxidized as it ...
The method of claim 2, wherein the flue gas comprises 10-25% (v/v) of O 2 and less than or equal to 3% (v/v) of SO 2; the phosphate rock slurry has a pH value of 4-6; the phosphate rock slurry and the flue gas are introduced to an absorption tower in a liquid-gas ratio of 8-12 L/m 3, and a temperature in the absorption tower is 25-60° C.
