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phosphogypsum in south africa

Purification of South African phosphogypsum for use as ...

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 in south africa - sdh-oresin.cz

The characterization of phosphogypsum and Phosphogypsum, a phosphorus-containing gypsum, is the most abundantly produced "chemical gypsum". The sources of natural gypsum in South Africa, suitable for use in the cement industry, are located at great distances from the cement works. Finding a use for phosphogypsum

Radioactive nuclides in phosphogypsum from the

2016-3-2 · O) or gypsum, or specifically phosphogypsum, is produced as a by-product. The LSA phosphogypsum is stored in waste stacks alongside the phosphoric acid factory. In a 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.

P H O S P H O G Y P S U M B E N E F I C I A T I O N

2021-3-26 · Three alternatives for the utilisation of the phosphogypsum from the Lowveld region of South Africa were investigated in this thesis, namely (a) its suitability for use as building material; (b) its conversion to saleable ammonium sulphate and precipitated calcium carbonate; and (c) the reaction mechanism, pathway and kinetics of its thermal ...

Capture and storage of CO2 into waste phosphogypsum:

2016-3-23 · 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

Phosphogypsum Conversion to Calcium Carbonate and ...

2019-4-18 · Phosphogypsum Conversion to Calcium Carbonate and Utilization for . Remediation of Acid Mine Drainage. J Mulopo. 1 * and D Ikhu-Omoregbe. 2. 1. Council for Scientific and Industrial Research, Natural Resources and the Environment, Pretoria, South Africa. 2. Chemical Engineering Department, Cape Peninsula University of Technology, Cape Town ...

[PDF] Radioactive nuclides in phosphogypsum from the ...

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.

An investigation into the effect of various chemical and ...

2003-8-1 · 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.

GYPSUM IN SOUTH AFRICA

3. SOUTH AFRICA 3.1 LOCATION AND TYPE OF GYPSUM MINES IN SOUTH AFRICA The South African gypsum production sites are shown on Figure 4. The Dikpens mine in Calvinia at the Northern Cape, and the Mount Stewart mine in Jansenville at the Eastern Cape, all occur in the Whitehill formation of the Ecca Group, within the Karoo Supergroup of rocks.

Potential radiological impact of the phosphate industry in ...

2020-6-1 · South Africa has about 2.3% of the world phosphate reserves and produces 2.3 million tonnes of phosphate rock per year, of which about 16% is exported . The Phalaborwa Igneous Complex in the Lowveld region of South Africa is underlain by Archaean granite which contains remnants of highly altered sedimentary, basic, and schistose rock of the ...

(PDF) Radioactive nuclides in phosphogypsum from the ...

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 ...

Radioactive nuclides in phosphogypsum from the lowveld ...

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

(PDF) Geotechnical Properties and Application of Lime ...

Residual deposits of Phosphogypsum are readily available in large quantities in South Africa and currently are landfilled or pumped into the sea, as there are limitations to engineering ...

Phosphogypsum Conversion to Calcium Carbonate and ...

2019-4-18 · Phosphogypsum Conversion to Calcium Carbonate and Utilization for . Remediation of Acid Mine Drainage. J Mulopo. 1 * and D Ikhu-Omoregbe. 2. 1. Council for Scientific and Industrial Research, Natural Resources and the Environment, Pretoria, South Africa. 2. Chemical Engineering Department, Cape Peninsula University of Technology, Cape Town ...

yk series vibrating screen for south africa phosphogypsum

2021-7-2 · yk series vibrating screen for south africa phosphogypsum Crushing equipment. Stone nemesis, invincible, support tailor-made, Large output, just to meet all user needs. Sand making equipment. shaping integrated machine, powerful, high-yield, environmental protection, energy saving.

Geotechnical Properties and Application of Lime Modified ...

2018-5-17 · Residual deposits of Phosphogypsum are readily available in large quantities in South Africa and currently are landfilled or pumped into the sea, as there are limitations to engineering applications due to the radionuclides content. In this study, mild acid treated residual phosphogypsum was stabilized with Lime Fly Ash (LFA) binder, and the geotechnical properties and changes in phosphogypsum ...

Phosphogypsum (PG): Uses and Current Handling

2013-9-26 · South Africa: Radiological content and dose assessment of PG Source Total annual effective dose to the critical group due to the application of Phosphogypsum in the agricultural sector. (mSv/a) (modelled) o to 2 years 2 to 7 years 7 to 12 years 12 to 17 years Adults Phosphogypsum in Agriculture 0.0066 0.0047 0.0056 0.0086 0.0031

An investigation into the effect of various chemical and ...

2003-8-1 · 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.

Geotechnical Properties and Microstructure of Lime-Fly

2018-9-2 · The use of industrial waste as a potential stabilizer of marginal construction materials is cost effective. Phosphogypsum and fly ash are industrial wastes generated in very large quantities and readily available in South Africa. In order to explore the potential stabilization of vastly abundant expansive soil using larger quantity phosphogypsum

(PDF) Phosphogypsum: potential uses and problems – a

2017-6-19 · Phosphogypsum (PG: CaSO4·2H2O) is a waste product generated by the phosphate industry. World production of this waste exceeds 200 million tonnes per year. PG, discharged into the sea ...

SOURCES OF GYPSUM IN SOUTH AFRICA – Agrispex

2018-3-3 · The main sources of gypsum are from the production of phosphoric acid from rock phosphate; gypsum produced from this process is a finely grained high purity material and is commonly referred to as phosphogypsum (PG). The main sources of PG in South Africa are located in Modderfontein, Phokeng, Potchefstroom and Phalaborwa which are reported to ...

An Evaluation of the Use of By-Product Phosphogypsum

2011-2-16 · AN EVALUATION OF THE USE OF BY-PRODUCT PHOSPHOGYPSUM AS A PAVEMENT MATERIAL FOR ROADS P Paige-Green and S Gerber* Transportek-CSIR, PO Box 395 Pretoria, 0001 *Lethabong MLC, PO Box 25, Edenvale, 1610 1. INTRODUCTION Although the construction of new roads and rehabilitation of older roads in South Africa is currently

Development of low content phosphogypsum waste

Key words: Phosphogypsum, environment, hydration, fly ash, slag. 1. Introduction Residual deposits of Phosphogypsum are readily available in large quantities in South Africa and currently are landfilled or pumped into the sea, as there are limitations to engineering applications due

phospho gypsum market price in south africa

Phosphogypsum Conversion to Calcium Carbonate and Utilization . Apr 23, 2012 . The conversion of phosphogypsum waste (a waste product of phosphoric acid production in Richard Bay, South . waste gypsum beneficiation have been proposed in South Africa: . market.

Recovery of Thourium from Phosphogypsum by Acid

South African phosphogypsum (from Phalaborwa) contains high levels of thorium that could be recovered for industrial use. The study was conducted to determine the best acid for leaching thorium from phosphogypsum; to investigate the effect of solid to liquid ratios and of concentration on the efficiency of the process; and to study the effect ...

phospho gypsum market price in south africa

phospho gypsum market price in south africa. phosphogypsum prices for sale phospho gypsum market price in south africa phospho gypsum market price in most of which are phosphogypsum waste phospho gypsum Chat Online used gypsum plant spain to sale ajitindiain Get Price phosphogypsum prices for sale While farmers have used gypsum calcium sulfate dihydrate for centuries

Phosphogypsum (PG): Uses and Current Handling

2013-9-26 · South Africa: Radiological content and dose assessment of PG Source Total annual effective dose to the critical group due to the application of Phosphogypsum in the agricultural sector. (mSv/a) (modelled) o to 2 years 2 to 7 years 7 to 12 years 12 to 17 years Adults Phosphogypsum in Agriculture 0.0066 0.0047 0.0056 0.0086 0.0031

PAPER OPEN ACCESS Effect of curing temperature and ...

Phosphogypsum (PG) and fly ash (FA) are the wastes produced in large quantities in South Africa. The quantities of this waste occupy notably large land and discharged to the environment without any prior treatment, and result in bringing on heavy air, soil and water pollution [1]. PG stockpiles with a quantity of 2 million tonnes are located at ...

A LABORATORY INVESTIGATION INTO THE

2021-3-26 · soil properties. In South Africa, stabilization is usually effected using a combination of mechanical densification and the addition of a binder to the soil. Two waste materials, PFA (a power station waste) and phosphogypsum (a waste from the fertilizer industry) have been shown to be useful binders overseas.

Radioactivity of Phosphogypsum in South-West of Spain ...

Made available by U.S. Department of Energy Office of Scientific and Technical Information ...