phosphogypsum slurry

Phosphogypsum Disposal Solid Waste Management

Apr 17 2015 · Design of gypsum storage/disposal areas (stacks) as well as vertical and horizontal expansions of existing areas which includes design of liners drains slurry walls surface drainage etc. Evaluation of the physical and chemical properties of phosphogypsum QA/QC testing and inspection of construction of gypsum stacks and related facilities

Strength and transportability of cemented phosphogypsum

Abstract In order to investigate the strength of cemented phosphogypsum (PG) backfill a batch of PG backfilling slurry with different concentrations were tested at different curing times. Furthermore a full-scale pipe test loop system was also established to investigate the pressure drop of the paste slurry with varied slurry concentrations and mix proportions flowing through the pipes.

Seismic Behaviour of Cast-In-Situ Phosphogypsum-Reinforced

After mixing uniformly pour into the aqueous solution prepared by water reducer and retarder and stir again to obtain the pouring slurry of phosphogypsum (Figure 7(c)). (4) Pumping the slurry into the template the slurry is self-levelling and basically coagulates in about 30 minutes (Figure 7(d)).

Waste PhosphogypsumMAFIADOC

The usual plant operation generates 4.9 tons of phosphogypsum per ton of phosphoric acid (calculated as 100 P2O5). Phosphoric acid as a valuable product is recovered from phosphogypsum slurry by initial filtering and three stages of subsequent filter cake

Phosphogypsuman overview ScienceDirect Topics

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)

Sustainable Approach for Recovery of Sulfur from

Phosphogypsum releases have a detrimental effect on flora and fauna and also cause economic loss due to the loss of sulfur. This study contributes to solving this problem using a process that consists of the valorization of this byproduct. A new sustainable method that consists of using sulfuric acid is proposed to process the Algerian phosphogypsum to recover the sulfur which is imported in

(PDF) Industrial Experiment of Goaf Filling Using the

phosphogypsum free water content of tailings and measured slurry concentration respectively. Table 2. Monitoring results of dihydrate-hemihydrate phosphogypsum filling slurry preparation 1 .

US8846562B2Method for preparing a nano-calcium

The present invention discloses a process for producing a nano calcium carbonate slurry from a feedstock of waste gypsum wherein an aqueous gypsum slurry of the feedstock is mixed with ammonia water by stirring with CO 2 injected in the slurry is under continuous stirring until the calcium sulfate in the waste gypsum is completely carbonated into nano calcium carbonate after filtration

Calculating Physical Properties Of SlurriesCheresources

A slurry pipeline is used to transport slurries from the source such as a coal mine to its destination such as a coal power plant. In this case the coal slurry will be a mixture of coal and water which is a transportation medium used to propel the combined solid-liquid mass through the pipeline using centrifugal pumps to provide the required

Potential Uses of Phosphogypsum and Associated Risks

The phosphogypsum is transferred as a slurry to onsite disposal areas referred to as phosphogypsum stacks. These stacks are generally constructed directly on unused or mined- out land with little or no prior preparation of the land surface. The gypsum slurry is pumped wOne metric ton

Strength and transportability of cemented phosphogypsum

phosphogypsum paste backfilling slurry Diyuan Li Central South University China Bing Liu Central South University China Jiang He Central South University China Xibing Li Central South University China Mingxing Jian Guizhou Kailin Mining Corporation China Abstract In order to investigate the strength of cemented phosphogypsum (PG) backfill

Guidelines for Management and Handling of

phosphogypsum from hazardous waste category under Schedule-I and stipulates that the management of phosphogypsum from phosphoric acid disposed off in dry or slurry form. There are two distinct processes for manufacture of phosphoric acid namely the di-hydrate process and the hemi-hydrate process. Combination of di-hydrate and hemi-hydrate

Slurry Preparation Effects on the Cemented Phosphogypsum

The cemented phosphogypsum (PG) backfill technique provides a new method for massive consumption of PG and therefore alleviating the environmental pollution of PG. This study considered the effects of slurry preparation on the performance of cemented PG backfill. A L16(44) orthogonal experiment was designed to analyze four factors namely the solid content phosphogypsum-to

CN101008316BPhosphogypsum cementing and post-filling

Phosphogypsum cementing and post-filling mining method and pulping technology thereof Download PDF Info Publication number CN101008316B. slurry cement Prior art date 2007-01-31 Application number CN2007100776243A Other languages Chinese (zh) Other versions

Clay DewateringClay FlocculationSettlingThickening

The matrix is mined by the dragline and placed in a slurry pit located above ground level and in reach of the dragline. In the slurry pit large high-pressure water guns (10 000 to 12 000 gal/min at 200 lb/in²) break down the matrix to produce a slurry (fig. 2) which is then pumped to the beneficiation plant.

MOSAIC BARTOW Chemical Plant NPDESMarch Against

The Environmental Protection Agency classifies phosphogypsum as a potentially hazardous waste due to its radioactivity. Phosphogypsum is an industrial waste byproduct of manufacturing fertilizer. It s mixed with a stucco-like material to make a slurry. The slurry is the material used to create the man-made mountains in between Bartow and Mulberry.

BENEFICIATION OF PHOSPHOGYPSUM Council of Scientific

Slurry mixer stirrer slurry pump vibrator separator/screen hydrocyclone centrifuge filter rotary drier. Raw materials Phosphogypsum (a by-product from phosphatic fertiliser industry). Institute Central Building Research Institute. Group Wise list/Search

The Claudius Peters Homogenizer

phosphogypsum source show stucco qualities which are not usable for further production. Slurry of this mate-rial dewaters and generates no strength. The crystals of this phosphogypsum show a very long needle-like shape which results in this high water demand. With the installation of

Phosphogypsum washing and drying equipment LZZG

Phosphogypsum washing and drying equipment. published date 03-09-2020. This set of phosphogypsum washing and drying equipment adopts the sieving washing and grading process flow that is the phosphogypsum is first sieved to remove large particles larger than 25 mm and then added to the grinding tank to grind into a slurry with water and the slurry is removed by trimming and

MOSAIC BARTOW Chemical Plant NPDESMarch Against

The Environmental Protection Agency classifies phosphogypsum as a potentially hazardous waste due to its radioactivity. Phosphogypsum is an industrial waste byproduct of manufacturing fertilizer. It s mixed with a stucco-like material to make a slurry. The slurry is the material used to create the man-made mountains in between Bartow and Mulberry.

Study of the Rheological Behavior of Phosphate Slurry and

Such as the phosphogypsum slurry and the phosphoric acid. Phosphoric acid H3PO4 is a fundamental element for the manufacture of fertilizer. In this work we focus on the study of the rheological

Florida Phosphate and Phosphogypsum

Historically the phosphate industry in Riverview Florida "stacks" their waste in huge mounds called phosphogypsum stacks "gypstacks". The gypstack mound holds radioactive materials such as Uranium and other heavy metals along with large volumes of sulfuric acid phosphoric acid and a phosphate slurry

Dihydrate reaction with gypsum and filter cakes by Prayon

The Central Prayon Process has been developed to produce a calcium sulfate (phosphogypsum) that can replace natural gypsum. This is a dihydrate-hemihydrate process. During the first reaction stage a pulp containing dihydrate is formed. The amount equivalent to the acid to be produced is filtered.

Experimental Study on Backfilling Mine Goafs with Chemical

To explore the feasibility of cemented paste backfill with phosphogypsum (PG) bleeding water and rheological tests (slump and on-site pipeline loop tests) were performed with PG backfill slurry (PGBS). In the bleeding water test the PGBS concentration with minimal bleeding water was measured between 60.87 and 67.61 in the rheological slump test values of 61 to 68 #x0025 were determined

Phosphogypsum stacksPage 3PEOPLE FOR PROTECTING

The phosphogypsum separated from the phosphoric acid is in the form of a solid/water mixture (slurry) which is stored in open-air storage areas known as stacks. The stacks form as the slurry containing the by-product phosphogypsum is pumped onto a disposal site. Over time the solids in the slurry build up and a stack forms.

TENORM Fertilizer and Fertilizer Production Wastes

Phosphogypsum. Phosphogypsum is the primary waste byproduct of the wet-acid process for producing phosphoric acid. During this process sulfuric acid dissolves phosphate rock creating a solid/liquid mixture (slurry) of phosphoric acid and calcium sulfate (phosphogypsum). The desired phosphoric acid component is separated from the mixture by

Feasability Analysis A Comparison of Phosphogysum and

product of this operation is a slurry that consists of the phosphoric acid solution and a suspended solid calcium sulfate commonly known as phosphogypsum. The slurry is routed to a filtration operation where the suspended phosphogypsum is separated from the acid solution. The acid

Experimental Study on Backfilling Mine Goafs with Chemical

To explore the feasibility of cemented paste backfill with phosphogypsum (PG) bleeding water and rheological tests (slump and on-site pipeline loop tests) were performed with PG backfill slurry (PGBS). In the bleeding water test the PGBS concentration with minimal bleeding water was measured between 60.87 and 67.61 in the rheological slump test values of 61 to 68 #x0025 were determined

Phosphogypsum Disposal Solid Waste Management

Apr 17 2015 · Design of gypsum storage/disposal areas (stacks) as well as vertical and horizontal expansions of existing areas which includes design of liners drains slurry walls surface drainage etc. Evaluation of the physical and chemical properties of phosphogypsum QA/QC testing and inspection of construction of gypsum stacks and related facilities

Chronology of major tailings dam failures

4-5 million m 3 of toxic water and slurry thousands of hectares of farmland covered with slurry 1997 Dec. 7 Mulberry Phosphate Polk County Florida USA Mulberry Phosphates Inc. phosphate phosphogypsum stack failure 200 000 m 3 of phosphogypsum process water biota in the Alafia River eliminated 1997 Oct. 22 Pinto Valley Arizona USA

Guidelines for Management Handling Utilisation and

Figure 9 Pumping of phosphogypsum in the form of slurry to the Ridge Dike of the phosphogypsum stack 11 Figure 10 Decanted water collection in surge pond over the phosphogypsum stack 12 Figure 11 Phosphogypsum lying at rail yards for transportation to the end users 13 Figure 12 Plant and machinery used for plaster board/

Solutions

Fixed belt conveyors in mineral processing plant

The belt conveyor is a kind of friction driven equipment which transports materials in a continuous way. It is mainly composed of frame, conveyor belt, idler, pulley, tensioning device...

Simple mobile belt conveyor in handling solution

Universal wheels are installed at the bottom of the mobile conveyor, which can be moved at will according to the stacking position of materials...

mobile design radial belt conveyor solution

The radial telescopic conveyor is one of the most cost efficient and effective way of stockpiling material . The reduction of segregation, degradation...

Heavy mobile belt conveyor for barge loading

The mobile belt conveyor with wheels could be applied for all kinds of block and granular material.It composed of conveying belt unit, arm stretch unit, hydraulic pressure control system...

TOP