Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
Read More
Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
Read More
By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
Read More
Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
Read More
Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
Read More
The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
Read More
Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
Read More
Ammonium and potassium sulfate In the hemihydrate or dehydrate state, it is used aiming to recover the SO 4 content in manufacturing of ammonium or potassium sulfate by the double de-composition ...
Details
Phosphogypsum (PG) is a by-product of the wet-process phosphoric acid process, which causes serious environmental issues. In this work, PG was taken as raw material to prepare α-calcium sulfate ...
Details
The main mineral phase of the raw phosphogypsum was characterized by X-ray diffraction analysis. As shown in Fig. 2 b, the XRD results confirmed that the mainly composed of phosphogypsum is calcium sulfate CaSO 4 ·2H 2 O The major peaks of CaSO 4 was identified at 11.71°, 20.80°, 23.44° and 29.16°, while some minor peaks …
Details
Phosphogypsum (PG) waste is a by-product generated from wet-process phosphoric acid (H 3 PO 4) manufacturing during phosphate rock decomposition.Worldwide, the annual production of PG ranges between 100 and 300 million tons, with only a few quantities utilized in several application domains (about 15%), the …
Details
The valorization of co-products in different fields is an interesting way to minimize many serious problems for ecosystems and human health. The novel process presented in this work is to propose an economic and ecological process of phosphogypsum (PG) conversion using soft chemistry.It makes possible to recover …
Details
In this present work, the transformation of the Moroccan phosphogypsum (PG) waste, considered a potential source of sulfate, into potassium sulfate compound could help reduce environmental impact and create a new value chain for the phosphate industry. Generally, solid–liquid equilibria are frequently applied in chemical industries. …
Details
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 tons of PG is produced per ton of ...
Details
1. process for preparing potassium sulfate with more by-products, with phosphogypsum and Repone K is raw material, with the solution that contains ammonia at least is liquid-phase catalyst, it is characterized in that phosphogypsum and Repone K soak that to be dissolved in ammonia concentration be in 25～36% the catalyst solution, …
Details
Methods of processing phosphogypsum into chlorine-free potash fertilizers by converting it with potassium carbonate or potassium chloride using both a …
Details
The obtained results show the high efficiency of portlandite Ca(OH)2 resulting from the dispersion of phosphogypsum in alkaline potash solution followed by releasing of potassium sulphate as a co ...
Details
PRODUCTION OF POTASSIUM SULPHATE 347 In order to intensify this process, it was also proposed to carry out the conversion of these salts in a aqueous ammonia solution [6, 7]. There are no clear recommen-dations on the process conditions for the interaction of phosphogypsum and KCl in order to obtain potassium sulfate.
Details
The aim of this process is to produce potassium sulfate, a high-value fertilizer, from sulfate solutions obtained after dissolving Moroccan phosphogypsum in NaOH medium.
Details
Abstract. To improve the process of potassium sulphate prepared from phosphogypsum (under study, no product, only method) in ammonia solution, the …
Details
The aim of this process is to produce potassium sulfate, a high-value fertilizer, from sulfate solutions obtained after dissolving …
Details
Phosphogypsum (PG), commonly known as calcium sulfate, is a waste by-product generated during the production of phosphoric acid by the wet phosphoric acid process (WPA). It is well known that every year the phosphate industries produce a large quantity of PG around the world (i.e., Currently, global production of this waste is …
Details
pH is one of the most important parameters that determine the crystallization process, but it is always neglected in the preparation of {alpha}-calcium sulfate hemihydrate ({alpha}-HH) from calcium sulfate dihydrate (DH) with the hydrothermal method. Flue gas desulfurization (FGD) gypsum, which is mainly composed of DH, was …
Details
The performance characteristics and growth mechanism of CSW were reviewed in this paper.The preparation methods of CSW,hydrothermal synthesis and atmospheric acidification method were also introduced,especially the influence of preparation process on the growth of CSW by hydrothermal synthesis was detailed.The pretreatment method …
Details
The impurities in phosphogypsum and its harm to the environment were introduced, and the advantages and disadvantages of the widely used pretreatment methods were analyzed in this paper. The application of phosphogypsum in the fields of cement retarder, building materials, agriculture, the production of sulfuric acid co …
Details
Phosphogypsum (PG) is an industrial byproduct primarily composed of calcium sulfate dihydrate (DH, CaSO 4 ·2H 2 O), generated from the wet process production of phosphoric acid. Currently, the ...
Details
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 tons of PG is produced per ton of phosphoric acid production, where worldwide PG generation exceeds 300 million tons annually. The vast majority of produced PG is discarded …
Details
Decomposition of phosphogypsum by potassium carbonate in aqueous solution Based on the previous works relative to the decomposition of the phosphogypsum by liquid route, we combined the reaction of preparing K2 SO4 from the phosphogypsum and KCl and the reaction of preparing (NH4 )2 SO4 from the phosphogypsum, the carbon dioxide …
Details
The factors affecting the conversion of potassium chloride to potassium sulfate, such as aqueous ammonia to phosphogypsum ratio, weight percent of isopropanol in the solution, weight percent excess phosphogypsum, and reaction temperature and pressure have also been investigated.The optimum reaction conditions obtained at 25°C and atmospheric ...
Details
Decomposition of phosphogypsum by potassium carbonate in aqueous solution Based on the previous works relative to the decomposition of the phosphogypsum by liquid route, we combined the reaction of preparing K2 SO4 from the phosphogypsum and KCl and the reaction of preparing (NH4 )2 SO4 from the phosphogypsum, the carbon dioxide …
Details
Download Citation | Evaluation for the process of mineralization of CO2 using natural K-feldspar and phosphogypsum to produce sulfate potassium | Mineralization of CO2 using thermal activated ...
Details
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 …
Details
Phosphogypsum is the most significant industrial solid waste in the world. Phosphogypsum has a complex composition and its traditional storage methods occupy large areas of land and also damage the environment. Currently, phosphogypsum is mainly used for the direct preparation of construction materials and chemical auxiliary …
Details
The production of potassium sulfate from phosphogypsum and potassium chloride in the presence of ammonia and isopropanol has been investigated. ... 50 55 60 65 70 Fig. 4- XRD patterns of PG (a) and SG (b) samples. 3.2. Process of preparing potassium sulfate guided by phase diagram In this process, Moroccan phosphogypsum can be used as …
Details
Phosphogypsum (PG) waste causes several environmental problems. The present work proposes an attractive process to recycle this industrial waste via the wet conversion and contributes to solve this problem. In our previous work, we tried to convert the PG by KOH at ambient temperature, but its total conversion was limited at the …
Details
Phosphogypsum (PG) is a by-product of the wet-process phosphoric acid process, which causes serious environmental issues. In this work, PG was taken as raw material to prepare α-calcium sulfate hemihydrate (α-CSH) at atmospheric pressure using Mg(NO3)2 solution, which is an environmentally friendly chlorine-free salt solution. The …
Details
The present work suggests an attractive process allowing total PG conversion by potassium hydroxide KOH. This decomposition leads to potassium …
Details
Phosphogypsum (PG) as a by-product was obtained from the production of phosphoric acid [].PG contains CaSO 4 ·2H 2 O mainly and some impurities such as phosphates, fluorides, silicon [], etc.Over 150 million and 10 million tons of PG were produced per year in the world and China, but only 4.3–4.6 % and 2–3 % were reasonably utilized [].A great …
Details
The process conditions for two-step conversion of phosphogypsum to make K2SO4 are obtained from single factor experiment: The optimal experimental condition for the first …
Details
To improve the process of potassium sulphate prepared from phosphogypsum (under study, no product, only method) in ammonia solution, the influence of solvent such as Methanol, Methanol-ammonia on the yield of potassium …
Details
Production of potassium sulfate by reacting ammonium sulfate and potassium chloride In this production process, potassium sulfate is produced by reacting ammonium sulfate and potassium chloride at a temperature of about 30 to 40 °C to produce a slurry containing K2SO4·(NH4)2SO4 double salt, and reacting this double salt with an aqueous ...
Details
The aim of this process is to produce potassium sulfate, a high-value fertilizer, from sulfate solutions obtained after dissolving Moroccan phosphogypsum in NaOH medium.
Details
Sofol is a well-known crusher and grinding mill manufacturer that offers equipment and solutions for customers from aggregates, mining and mineral grinding industry.
You can leave your message here, we'll send you an Email immediately.
Online ChatCopyright ©2000- 2024 Shanghai Sofol CompanySitemap
PE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
GET QUOTE