The invention discloses a method using phosphogypsum as the raw material to produce ammonium sulfate, and the method comprises steps as follows: 1750 shares of crude phospho gypsum which contains 20 percent of free water is taken, and 2 to 5 percent of the amount of the crude phospho gypsum of activator is added the aging for 2 to 8 days; then, a reaction tank and an ammonium …
Ammonium sulfate as fertilizer As a fertilizer, AS supplies two fundamental nutrients: ni-trogen and sulfur. Of the total amount of nitrogen fertilizers only 4% is ammonium sulfate. The main reason for this is the relatively low Nitrogen content of AS, as compared to that of for instance Urea (21% and 45% respectively). As a result, the
The phosphogypsum basically consists of calcium sulfate dihydrate with small amounts of silica, P2 O 5, iron, aluminum and fluoride as well as traces of radioactive materials comprises radium and uranium, also heavy metals and lanthanides as presented in Table 1.
Phosphogypsum is produced in the chemical process of preparing phosphoric acid using the sulfuric acid method. For every ton of phosphoric acid produced, about 4.5–5.5 tons of phosphogypsum is produced [1,2,3].Reports show that the average annual emission of phosphogypsum has reached 70 million tons and that the accumulated stockpiles have reached more than 300 million tons while the ...
Material Safety Data Sheet Ammonium sulfate solution sc-291897 Hazard Alert Code Key: ... Large doses of ammonia or injected ammonium salts may produce diarrhoea and may be sufficiently absorbed to produce increased ... water Balance Section 4 - FIRST AID MEASURES SWALLOWED
Write a Balanced Molecular Equation for the Following Word Equation: Ce{Lead Sulphate + Ammonium Hydroxide->Ammonium Sulphate + Lead Hydroxide}
(Reference Chen, Kost and Dick 2008) with the application of ammonium sulphate and S from flue-gas desulphurisation respectively. In a greenhouse study using isotopic labeling S, Silva et al . ( Reference Silva, Alvarez Venegas, Ruiz and Sant'Anna 2003 ) found that corn and soybean showed different behaviours in S absorption and redistribution.
Stoichiometrically, for every 1.0 tonne of ammonium sulphate produced, 0.9 tonnes of PCC is also produced and 1.6 tonnes of gypsum and 0.4 tonnes CO 2 are consumed. South Africa has an opportunity to sequestrate up to 0.2 % of its CO 2 emission and 100 % of its phosphogypsum generation through the Merseburg. Chou et al. are the latest to evaluate the Merseburg process on …
Transforming Phosphogypsum Waste ... material to be processed and the available markets for products make it necessary to use a ... processes can result in ammonium sulphate …
The ammonium carbonate solution was metered to the ammonium carbonate/gypsum/ammonium sulfate pump tank at a pre-determined rate of 26.9 lbs/hr using a Master flex variable speed peristaltic pump® and tubing. Just before 10 AM on Mar. 6, 2012, the gypsum/ammonium sulfate/ammonium carbonate slurry was pumped to the converter from the pump tank.
Ammonium sulfate preparation from phosphogypsum waste Abdel-Hakim T. Kandil a, Mohamed F. Cheira b, *, Hady S. Gado b, Madiha H. Soliman a, Hesham M. Akl a a Chemistry Department, Faculty of Science, Helwan University, Egypt b Nuclear Materials Authority, P.O. Box 530 El Maadi, Cairo, Egypt article info Article history: Received 8 September 2016
A low cost process for preparing ammonium sulphate is characterized in that land plaster with the granularity of 150 to 200 mesh is added into ammonia which contains CO2 and has the ammonia concentration of 180 to 200 titer and the ammonia temperature of 40 DEG C to 50 DEG C; the carbonized ammonia and the plaster are heated for reaction; the pH value during the reaction is 7.2 to 75; the ...
Ammonium sulfate is an inorganic sulfate salt obtained by reaction of sulfuric acid with two equivalents of ammonia.A high-melting (decomposes above 280℃) white solid which is very soluble in water (70.6 g/100 g water at 0℃; 103.8 g/100 g water at 100℃), it is widely used as a fertilizer for alkaline soils. It has a role as a fertilizer.
manufacture of ammonium sulfate fertilizer from gypsum-rich by flue gas desulfurization (FGD)-gypsum to ammonium sulfate fertilizerhas .... for 300 days per year of operation, the plant produces 200,000 tons gypsum per year. ....Ammonium Sulfate, Encyclopedia of Chemical Processing and Design, vol21,.
The invention discloses a method for producing ammonium sulfate phosphate by decomposing phosphorite by ammonium hydrogen sulfate and relates to a fertilizer prepared by the phosphorite through double decomposition. The method comprises the following working procedures: step 1, ammonium sulfate is continuously added into a purolyzer and is pyrolyzed by hot furnace gas; step …
Study on The Production of Ammonium Sulfate Fertlizer From Phosphogypsum Khalid K. Abbas * Received on: 1/9/2010 Accepted on:3/2/2011 Abstract The production of ammonium sulfate fertilizer from phosphogypsum is studied. The phosphogypsum is considered by product from extraction process of sulphoric acid.
By using sulfuric acid to remove the impurities, a highly purified ammonium sulfate fertilizer was prepared by using PG as raw material. In this manufacturing process, first, 1 kg of grounded PG powder (200 mesh size) was soaked in 4L sulfuric acid with a concentration of …
Calcium sulfate (phosphogypsum), which is the ... of the produced phosphogypsum involves reaction with ammonium carbonate and conversion into ammonium sulfate (useful in fertilizers) and calcium carbonate by- ... phosphate rock and sulfuric acid raw material as well as water required for the filter
While some quantities are 2004-05 1242.5 5591.25 utilized for production of ammonium sulphate and few other 2005-06 1067.8 4805.1 uses, there are accumulated stocks of more than 10 million 2006-07 1331.8 5993.1 metric tons of Phosphogypsum at various plant sites.
material can lead to exposure of occupants to radon gas and its short lived daughter products. ... phosphogypsum to ammonium Sulphate. J. Environ. ... Ammonium sulfate is an excellent fertilizer ...
title = "Transforming phosphogypsum waste into products with market value", abstract = "Vast amounts of phosphogypsum (PG) which is a by-product of phosphorous acid production from apatite rock using sulphuric acid, are deposited in large piles at many locations worldwide. PG materials are added at rates of the order of megatonnes (Mt) per annum.
OUR OFFER is similar to the prototype - treatment of ammonium phosphogypsum with the production of ammonium sulfate and industrial calcium carbonate, but differs in addition to the processing of calcium carbonate for marketable calcium chloride and potassium sulfate, which ... 7.5 billion tons - total raw material base.
phosphogypsum into calcium carbonate using an aqueous process and produce sodium sulfate. Sodium sulfate could then be used as a marketable product or be used as a feed
Moreover, the optimum conditions of the ammonium sulfate preparation are 10 g of the suspended impure or puri fied phosphogypsum in 40 ml of 3% ammonium sulfate solution (as initiator), 1/4...
Conversion of phosphogypsum to potassium sulfate and calcium ... valorization of this product as a material of embankment work ... the manufacturing of the sulfate of ammonium (NH 4) 2SO
This modified zeolite had rapid adsorption and slow balance characteristics. ... and is suitable for recycling phosphogypsum ... materials could be an excellent material to remove ammonium ...
The process of producing phosphoric acid from the reaction of phosphate rock and sulphuric acid generates significant amounts of calcium sulphate, a by-product that is commonly referred to as 'phosphogypsum'. Phosphogypsum can be used in a wide variety of applications, but from the large quantity produced annually worldwide, only a small part of it finds a commercial use.
Processing o f dumps of phosphogypsum to produce new ... Of particular interest are methods for the conversion of ph osphogypsum to produce ammonium or sodium sulfate and commercial calcium carbonate. Mathematical modelling showed the fundamental possibility of such an ... Table-1. Balance deposits containing rare and rare earth metals.
The mereseberg process is used a waste of phosphogypsum withammonium carbonate to produce ammonium sulfate as a main product andcalcium carbonate as a byproduct. It is a process could be used as a successfulmethod in phosphate industry (AL-Qauim).The flow diagram is drawn to illustratethe mersberg process then material balance is done.
A method for preparing ammonium sulfate as fertilizer by phosphogypsum through ball milling, comprising the steps of taking the phosphogypsum, ammonium bicarbonate and water as raw materials, adding Ca2SO4*2H2O with the dosage 1-20% by weight percentage more than the stoichiometric ratio in the reaction of Ca2SO4*2H2O and NH4HCO3, converting the content of the Ca2SO4*2H2O in the phosphogypsum ...
