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Method for producing wet-process phosphoric acid and

 · The method not only reduces the content of phosphorus in the by-product alpha-hemihydrate gypsum but also realizes the industrial production of phosphoric acid and by-products ordinary alphahemihydrate gypsum and high-purity and high-whiteness alpha-hemihydrate gypsum by a wet-process. (71) Kingenta Norsterra Chemical Co. Ltd (CN)

Materials Free Full-Text Study on Preparation and

Yellow phosphorus slag (YPS) is a byproduct produced during the production of yellow phosphorus from phosphate minerals using the high temperature electric furnace method. During this process coke and silica are used as reducing agents and slagging agents respectively that react with phosphate

Mechanical activation of chemically activated high

 · 1. Introduction. Recently the use of supplementary cementing materials in the production of composite cements has attracted a growing attention because of ecological economical and diversified product quality reasons .Phosphorous slag (PHS) is a by-product of yellow phosphor production via electric furnace method mainly consisting of calcium oxide (CaO) and silicon dioxide (SiO 2) .

Phosphogypsum Uses And Production Process

 · Phosphogypsum Uses And Production Process Summary Phosphogypsum refers to the solid waste in the production of phosphoric acid with sulfuric acid phosphate rock the main component is calci

the process of making gypsum powderwhitebull

the process of making gypsum powder. Gypsum Powder Making Process Plant for Sale Raw material crushing procedure Gypsum powder production line gypsum block consists of coarse jaw crusher initial crushing homogenization in the discharge field partition layout and then by fine jaw crusher secondary crusher to enter the silo.

Removal of phosphorus fluoride and metals from a

 · The objective of this work was to evaluate the capacity of steel slag filters to treat a gypsum mining leachate containing phosphorus fluoride and metals. The proposed slag filter process was composed of two successive Fort Smith EAF slag operated at total hydraulic retention time of voids of 34 h.

NPK Mixing ManufacturingJobson Enterprises

Phosphate Fertilizers . Rock phosphate (2738 P2O5) is the raw material source from which all types of phosphate fertilizers are produced with the minor exception of basic slag (1218 P2O5) which is a by-product of steel production.

Cemented backfilling performance of yellow phosphorus

 · The experiments on the cemented backfilling performance of yellow phosphorus slag including physical-mechanical properties chemical compositions optimized proportion and cementation mechanisms were carried out to make good use of yellow phosphorus slag as well as tackle with environment problems safety problems geological hazards and high-cost issues during mining in Kaiyang Phosphorus

Laboratory Evaluation for Utilization of Phosphogypsum

 · Carbide slag was used as an activator to improve the activity of anhydrous phosphogypsum. Carbide slag could greatly improve the mechanical strength of anhydrous phosphogypsum than K2SO4. The compressive strength of 11 wt carbide slag and 1 wt K2SO4 activated anhydrous phosphogypsum increased greatly to 8.6 MPa at 3 d and 11.9 MPa at 7 d and 16.0 MPa at 28 d

(PDF) Utilization of waste phosphate aluminum slag for

The effects of copper slag and phosphorus slag on the phase composition heat release and compressive strength were investigated. The phase composition was analysed by X-ray powder diffraction.

Phosphate Rock Properties

 · The process consists of spraying finely ground phosphate rock and elemental phosphorus into one end of a horizontal -lined cylindrical chamber with an excess of air to oxidize the phosphorus. The other end of the combustion chamber is connected with a vertical -lined tower filled with phosphate-rock briquets to absorb any surplus P2O5

Mechanical activation of chemically activated high

 · Phosphorous slag (PHS) is a by-product of yellow phosphor production via electric furnace method mainly consisting of calcium oxide (CaO) and silicon dioxide (SiO 2) . PHS exhibits latent hydraulic activity with some pozzolanic character (reaction with lime).

Treatment of Yellow Phosphorus Slag and Reuse of It as an

 · Yellow phosphorus is used widely in the world for production of phosphoric acid various phosphates flame retardant detergent water treatment metal surface treatment etc. After the production of yellow phosphorus a large amount of phosphorus sludge is discharged to environment causing environment pollution. This work focused on treatment of yellow phosphorus slag (YPS) and application

How Phosphate is Mined and Processed

 · 4. Describe the phosphate cycle and how the use of chemical phosphate fertilizer alters this cycle. 5. Identify how air water and land can potentially be polluted by phosphate mining fertilizer production and fertilizer use. 6. Summarize the effects of phosphate mining on land use in Florida. 7.

Phosphogypsum powder processinghcmilling

Phosphogypsum powder processing technological process Phrase one raw material crushing Phosphogypsum blocks will be crushed to 15mm-50mm fineness by crusher.

processing technology (enrichment) of gypsumBINQ

Renforth et alEarth and EnvironmentUniversity of Leeds. bauxite processing residue that occurred in Ajka western Hungary in October 2010. These centred on acid and gypsum dosing to reduce pH and minimise mobility of oxyanion tion technologies that could be applied to red mud slurries and other alkalinity rather than contaminant element enrichment is the key

Gypsum Crystallization during Phosphoric Acid

 · process (x = 2 gypsum as the final crystal form) and the nondihydrate process (also known as the hemihydrate process because hemihydrate is involved although it is not necessarily the final crystal form). The dihydrate process is the earliest developed industrial phosphoric acid production technology.

METHOD FOR PRODUCING WET-PROCESS PHOSPHORIC

Provided is a method for producing wet-process phosphoric acid and at the same time obtaining alpha-hemihydrate gypsum as well as high-purity and high-whiteness alpha-hemihydrate gypsum including mixing phosphoric acid and phosphate rock powder and performing extraction reaction adding sulfuric acid solution to continue the reaction so that 30 to 50 of calcium ions are generated into

TENORM Fertilizer and Fertilizer Production Wastes US EPA

 · Phosphate Slag. Phosphate slag is the principal waste produced from the thermal process for the conversion of phosphate rock to elemental phosphorus. Production of elemental phosphorus primarily in Idaho has steadily gone down due to decreasing demand and increasing energy costs associated with its production.

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)

Method for producing phosphoric acid and by-producing

Provided is a method for producing phosphoric acid and at the same time obtaining alpha-hemihydrate gypsum including adding a phosphate rock powder and a part of dilute sulfuric acid into an extraction tank carrying out an extraction reaction on same separating a clear liquid from the obtained mixed slurry sending the clear liquid as a finished product phosphoric acid into an acid

Lecture 21 Phosphorous Phosphorus Phosphate

 · Phosphorus is a component of DNA RNA ATP and also the phospholipids that form all cell membranes. It is not found in its free element form on Earth due to its high reactivity. Phosphorus as a mineral is present in oxidized state as inorganic phosphate rocks. Phosphate rock is used as a phosphatic fertilizer after grinding called phosphorite or mineral phosphate.

Comprehensive Utilization of Iron and Phosphorus from

 · At a slag particle size of 20.7 μm (90 passing) 94.54 of the P 2 O 5 could be solubilized in citric acid indicating the slag met the feedstock requirements in phosphate fertilizer production. Consequently the proposed process achieved simultaneous Fe and P recovery paving the way to comprehensive utilization of high-phosphorus refractory

Granular crystallization using CFBC ash for phosphorus

 · A manufacturing procedure for CFBC I is shown in Fig. 7. First the CFBC ash powder is mix with water for hydration CaO in the ash is hydrated to form Ca(OH) 2 in a 40-min exothermic reaction. During this process a volumetric expansion of CaO occurs.

Valorization of SiMn Sludge for Production of Low

 · The sludge generated by wet scrubbing the off-gas from a silicomanganese plant in Norway represents a significant loss in silicon and manganese values. This work seeks to extract these values in the production of ferroalloys and slags that can be utilized by alternative industries. Carbothermic smelting the sludge together with iron or iron scraps at 1600 °C produced FeSiMn alloys consisting

Cemented backfilling performance of yellow phosphorus

Yellow phosphorus slag (YPS) is a kind of industrial waste generated after water quenching produced during the hot production process of yellow phosphorus the output of yellow slag is 8-10 tons

PRODUCTION OF PHOSPHORIC ACIDProduct

 · The process is known as "thermal" when the raw material is elemental phosphorus. This process has been abandoned because of the amount of energy which is needed. The processes that use phosphated minerals which are decomposed with an acid are known as "wet processes" and they are the only economic alternative way to produce phosphoric

How phosphate is mined and processed

 · 4. Describe the phosphate cycle and how the use of chemical phosphate fertilizer alters this cycle. 5. Identify how air water and land can potentially be polluted by phosphate mining fertilizer production and fertilizer use. 6. Summarize the effects of phosphate mining on land use in Florida. 7.

Gypsum Crystallization during Phosphoric Acid

 · process (x = 2 gypsum as the final crystal form) and the nondihydrate process (also known as the hemihydrate process because hemihydrate is involved although it is not necessarily the final crystal form). The dihydrate process is the earliest developed industrial phosphoric acid production

Processing Technogenic Raw Materials-Phosphorus Slags

The paper provides a flow sheet of the phosphorus slag processing to produce precipitated silica (white soot). The process conditions for opening phosphorus slag at the I stage of leaching have been selected the nitric acid concentration is 3.5 mol/dm3 the ratio S L = 1 3.5 the temperature is 60 oС and the process duration is 1 hour. The parameters of the white soot production II stage

Gypsum Crystallization during Phosphoric Acid

 · process (x = 2 gypsum as the final crystal form) and the nondihydrate process (also known as the hemihydrate process because hemihydrate is involved although it is not necessarily the final crystal form). The dihydrate process is the earliest developed industrial phosphoric acid production

Gypsum as an Agricultural Amendment General Use

 · Gypsum is a moderately soluble source of the essential plant nutrients calcium and sulfur and can improve overall plant growth. Gypsum amendments can also improve the physical and chemical properties of soils thus reducing erosion losses of soils and nutrient concentrations (especially phosphorus) in surface water runoff. Gypsum is the

How phosphate is mined and processed

 · 4. Describe the phosphate cycle and how the use of chemical phosphate fertilizer alters this cycle. 5. Identify how air water and land can potentially be polluted by phosphate mining fertilizer production and fertilizer use. 6. Summarize the effects of phosphate mining on land use in Florida. 7.