Phosphogypsum In South Africa

20-06-2007· Phosphogypsum refers to the calcium sulfate hydrate formed as a by-product of the production of fertilizer from phosphate rock.It is mainly composed of gypsum (CaSO 4 ·2H 2 O). Although gypsum is a widely used material in the construction industry, phosphogypsum is usually not used, but is stored indefinitely because of its weak radioactivity. ...

phosphogypsum contains lower activity concentrations of naturally occurring radioactive nuclides of uranium ... country like South Africa, that has a challenge to provide low cost or affordable housing, 1 the use of phosphogypsum to manufacture building material is an attractive option.

The impurities in phosphogypsum greatly restrict its industrial use in Portland cement. We have investigated a method to remove the phosphorus impurities present in South African phosphogypsums, and found that the combination of a thermal and a sulphuric acid treatment was successful in removing most of the harmful phosphorus impurities.

Phosphogypsum is a waste by-product from the processing of phosphate rock in plants producing phosphoric acid and phosphate fertilizers, such as superphosphate. The wet chemical phosphoric acid treatment process, or ‘wet process’, in which phosphate ore is digested with sulfuric acid, is widely used to produce phosphoric acid and calcium sulfate, mainly in dihydrate form (CaSO 4 · 2H 2 O):

Thermogravimetric analysis of untreated and treated South African phosphogypsum sam- ples, indicating the percentage mass loss obtained for the dehydration of CaSO 4 ·2H 2 O to CaSO 4 .

01-08-2003· In South Africa, major gypsum deposits are located far from cement-producing plants. Increasing transport costs have forced cement companies to seriously consider the replacement of natural gypsum with close by phosphogypsum resources.

11-04-2012· South Africa: Environmental problems of Foskor’s phosphogypsum waste April 11, 2012 at 10:20 ( Fertilizers , Phosphate Fertilizers ) The majority owned by the state-owned Industrial Development Corporation, Foskor phosphoric acid and fertilizer …

01-08-2003· In South Africa, major gypsum deposits are located far from cement-producing plants. Increasing transport costs have forced cement companies to seriously consider the replacement of natural gypsum with close by phosphogypsum resources.

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Phosphogypsum Stacks Page 2 People For. That prompted EPA to launch a national review of phosphate mining facilities said EPA spokeswoman Julia Valentine Thats how inspectors found workers were mixing the corrosive substances from the fertilizer operations with the phosphogypsum and wastewater from the mineral processing she said

Phosphogypsum powder processing - hcmilling. Phosphogypsum powder processing. Hong Cheng vertical mill --HLM vertical milling integrate from drying, grinding, classification, transport as a whole, mainly used grinding and processing of cement, clinker, power plant desulfurization with lime powder, slag powder, manganese ore, gypsum, coal , barite, calcite and other materials.

Phosphogypsum refers to the calcium sulfate hydrate formed as a by-product of the production of fertilizer from phosphate rock.It is mainly composed of gypsum (CaSO 4 ·2H 2 O). Although gypsum is a widely used material in the construction industry, phosphogypsum is usually not used, but is stored indefinitely because of its weak radioactivity.The long-range storage is controversial.

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We evaluated the suitability of phosphogypsum from the Lowveld region of South Africa (LSA), for the manufacturing of building materials, with reference to (1) the National Nuclear Regulator Act 47 of 1999 and (2) the radioactivity associated risks as quantified in terms of the external and internal hazard indices, the activity concentration index and the radium equivalent.

The impurities in phosphogypsum greatly restrict its industrial use in Portland cement. We have investigated a method to remove the phosphorus impurities present in South African phosphogypsums, and found that the combination of a thermal and a sulphuric acid treatment was successful in removing most of the harmful phosphorus impurities.

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Phosphogypsum refers to the calcium sulfate hydrate formed as a by-product of the production of fertilizer from phosphate rock.It is mainly composed of gypsum (CaSO 4 ·2H 2 O). Although gypsum is a widely used material in the construction industry, phosphogypsum is usually not used, but is stored indefinitely because of its weak radioactivity.The long-range storage is controversial.

Alibaba.com offers 72 phosphogypsum products. About 20% of these are gypsum powder machines, 11% are other construction material making machinery, and 9% are rotary drying equipment. A wide variety of phosphogypsum options are available to you, such as rock phosphate, impact crusher.

Processing Of Phosphogypsum For The Manufacture Of Gypsum Plaster. We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral processing equipment and building materials equipment.

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