آخرین محصولات

Dephosphorization of a High−phosphorus Iron Ore by …

The iron concentrate indexes of total Fe grade 65.50%, total Fe recovery 96.31% and P content 0.16% were obtained, which 77.46% of P removed. The experimental results offer guidance for iron extraction and dephosphorization of iron ore in Algeria.

A new iron recovery and dephosphorization approach from …

Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for simultaneous iron …

Direct Dephosphorization from Iron Ore Containing Higher Concentration

Iron ore containing higher concentration of phosphorus is reduced by hydrogen gas containing water vapor. 13% of removing yield of phosphorus is obtai … Direct Dephosphorization from Iron Ore Containing Higher Concentration of Phosphorus

Review on High Phosphorous in Iron Ore: Problem and Way …

Phosphorous is an undesired element present in iron ore used in the steel making process. It leads to an increase in overall production cost as well as deteriorated steel quality. The desired phosphorus content in iron ores used in steel making is < 0.1%. Numerous beneficiation studies are mentioned in the literature; however, there is no commercial scale …

Removal of Phosphorus From High Phosphorus Iron Ores by …

The selective HCl leaching method was used to remove phosphorus from high phosphorus iron ores. The hydroxyapatite in high phosphorus iron ores was converted into soluble phosphate during the process of HCl leaching. The effects of reaction time, particle size, hydrochloric acid concentration, reaction temperature, liquid-solid ratio and stirring strength on …

journals on dephosphorization of iron ore illia

journals on dephosphorization of iron ore - cad-house.co.za. journals on dephosphorization of iron ore illia. journals on dephosphorization of iron ore iron ore mining process iron ore sulphur removal equipment how to remove journals on dephosphorization of iron ore a material flow analysis of phosphorus i The Experimental of Dephosphorus of Smelting High …

Influence of Mechanical Activation on Acid Leaching Dephosphorization

High pressure roll grinding (HPRG) and ball milling were compared to investigate the influence of mechanical activation on the acid leaching dephosphorization of a high-phosphorus iron ore concentrate, which was manufactured through magnetizing roasting-magnetic separation of high-phosphorus oolitic iron ores. The results indicated that when high-phosphorus iron …

Progress on Dephosphorization of High-Phosphorus Iron Ore

Progress on Dephosphorization of High-Phosphorus Iron Ore[J]. Conservation and Utilization of Mineral Resources, 2009, (2): 50-54. doi: 10.3969/j.issn.1001-0076.2009.02.013. Progress on Dephosphorization of High-Phosphorus Iron Ore,, Publish Date: 25 April 2009 FullText(HTML) ...

Dephosphorization Treatment of High Phosphorus Iron Ore …

Dephosphorization Treatment of High Phosphorus Iron Ore by Pre-reduction, Air Jet Milling and Screening Methods ISIJ International 10.2355/isijinternational.51.544

Research on efficient utilization of high-phosphorus oolitic …

The paper proposes the innovative technology of hydrogen mineral phase transformation–magnetic separation–acid leaching for iron enrichment and dephosphorization, based on the mineralogical characteristics of high phosphorus oolitic hematite and difficulties that make it difficult to utilize traditional beneficiation for separation. The influences of the reduction …

Iron Ore Dephosphorization of Gara Djebilet Deposit by

Decreased phosphorus content in iron-ore concentrate can be received by the method of hydrometallurgy (desalinization of phosphorus by mineral acid). On theexperimental base of OJSC VNIIMT, a laboratory research was carried out regarding iron ore dephosphorization; as a result maximum possible content of phosphorus was obtained in a final product.

Calcium Carbonate as Dephosphorization Agent in Direct …

A direct reduction iron (DRI) boasting 95.57% iron content, 93.94% iron recovery, 0.08% phosphorus content, and an impressive 92.08% dephosphorization is …

Increasing Iron and Reducing Phosphorus Grades of …

The results showed that an optimized iron ore concentrate with an iron grade of 67.54%, phosphorus content of 0.11%, and iron recovery of 78.99% were obtained under …

(PDF) Factors Affecting Dephosphorization of Agbaja Iron Ore …

Abstract: The purpose of this research work is to determine the optimal factor combinations for dephosphorization of a Nigerian Agbaja iron deposit –the largest inferred deposit of about 1.250 ...

An integrated process for the treatment of apatite obtained …

A process has been proposed for the treatment of apatite concentrate obtained from the dephosphorization of iron ore. In this process, the apatite is acidulated by HNO 3 to produce high-purity H 3 PO 4.The crude acid obtained is shown to be at least equivalent to, if not better than, the typical wet-process acid.

Research Progress on the Effects of Reducing Agents and

This is an article in the field of mining engineering. The effects of reducing agent and dephosphorization agent on the direct reduction of high phosphorus oolitic hematite were reviewed. The research status of the influence of reducing agents on the reduction of high-phosphorus oolitic hematite was summarized from two aspects of coal and other reducing …

Influence of Mechanical Activation on Acid Leaching Dephosphorization

The results indicated that when high-phosphorus iron ore concentrates containing 54.92 mass % iron and 0.76 mass % phosphorus were directly processed through acid leaching, iron ore concentrates containing 55.74 mass% iron and 0.33 mass % phosphorus with an iron recovery of 84.64 % and dephosphorization of 63.79 % were obtained.

Optimization of Process Parameters for the Dephosphorization of iron

The Nigerias Agbaja iron ore reserve is estimated to be over 1.2 billion tones (Uwadiele, 1991). Iron ore resources are fast depleting as a result of a pressure originating from population and industrial development requirement. However, there exist large stockpiles of low and lean grade ores to be mined, of which Agbaja iron ore is one of such ...

Dephosphorization of Iron Ore Bearing High Phosphorous …

As the reduced iron and unreduced P-contained gangues were not efficiently separated, a high iron recovery ratio and a reasonable dephosphorization rate were incompatible under the …

Removal of Phosphorus From High Phosphorus Iron Ores by …

After dephosphorization reaction, the content of phosphorus in iron ore complied completely with the requirements of steel production. The selective HCl leaching method was …

Optimization of Process Parameters for the Dephosphorization of iron …

An attempt has been made in this study to optimize the process variables for the dephosphorization of iron ore using nitric acid. Standard central composite design with 2 full factorial was used to develop the model. The model was optimized using

Combined processing and dephosphorization of brown iron ore …

The article presents studies aimed to establish the possibility of obtaining iron ore concentrate with low phosphorus content from high-phosphorus ore (with mass fractions of iron of 43.67 % and phosphorus of 0.89 %) of the Kokbulak deposit in Kazakhstan (Northern Aral Sea region). The mineral and grain-size compositions of Kokbulak ore have been studied.

Green and efficient separation of iron and phosphorus from …

To provide a new method for the dephosphorization of high-phosphorus oolitic iron ore (HPOIO) by reduction roasting, the feasibility of the high-efficiency separation of iron and phosphorus by reduction roasting and magnetic separation process (RRMSP) without a dephosphorization agent was studied. The results showed that the full separation of iron …

Oxidation Roasting, Gas-based Reduction Followed by …

This is an article in the field of metallurgical engineering. In view of the problems of low compressive strength and high reduction temperature in the gas-base reduction of a high-phosphorus iron ore, a new process of oxidation roasting, gas-based reduction followed by magnetic separation was proposed. The effect of oxidation temperature and the types and …

Removal of phosphorus from iron ores by chemical leaching

Alkali-leaching and acid-leaching were proposed for the dephosphorization of Changde iron ore, which contains an average of 1.12% for phosphorus content. Sodium hydroxide, sulfuriced, hydrochloric and nitric acids were used for the preparation of leach solutions. The results show that phosphorus occurring as apatite phase could be removed by …

Thermomagnetic Enrichment and Dephosphorization of Brown Iron Ore …

Oolitic brown iron ores are of great economic importance because of the vast reserves that exist in the world. However, their high phosphorus content has limited their use in metallurgy. Exciting enrichment methods are essentially unable to decrease the phosphorus content in such ore, since the phosphorus is present in embedded form as emulsions, without forming independent …

Dephosphorization of a High−phosphorus Iron Ore by …

The roasting -leaching technology for iron extraction and phosphorus reduction was proposed with a view to achieving efficient utilization of high-phosphorus iron ore. This …

Current Status of Iron Ore Dephosphorization and …

Ding Zhan, Wen Shuming, Li Chunlong, Yu Pan, Wu Meng, Bai Shaojun. Current Status of Iron Ore Dephosphorization and Desulphurization Process and a New Method for Simultaneous Removal[J]. Multipurpose Utilization of Mineral Resources, 2020, (3): 56-62,32. doi: 10.3969/j.issn.1000-6532.2020.03.009

Biodephosphorization of Iron Ore using …

the iron ore if properly beneficiated and dephosphorized can be used in steel making. The high phosphorus content adduces the reason why the iron ore has not been exploited. The sulphur content, though small, can constitute cog in the wheel of making steel using the iron ore. The other components of the iron ore are quite

Mixture of ilmenite and high phosphorus iron ore smelted …

In order to reasonably utilize the abundant resources of high-phosphorus iron ore and ilmenite in China, the technology of top-blown smelting reduction with oxygen enrichment was used to smelt the mixed ore of high-phosphorus iron and ilmenite. The effect, which is related to basicity, reduction temperature, carbon-oxygen ratio and time of ventilated oxygen to iron …

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