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dephosphorization treatment high phosphorus cement clinker

Clinker is a nodular material produced in the kilning stage during the production of cement and is used as the binder in many cement products. The lumps or nodules of clinker are usually of diameter 3-25 mm and dark grey in color. It is produced by heating limestone and clay to the point of liquefaction at about 1400 C-1500 C in the rotary kiln. ...

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  • Does phosphorus affect the industrial Portland cement

    Nov 10, 2018 In fact Portland clinker typically contain around 0.2 wt% of P 2 O 5. Most of the studies agree to show that higher phosphorus contents in clinker favors the formation of belite (C 2 S) and free lime to the expense of alite (C 3 S) . As alite is the main hydraulic compound of Portland cement and the most reactive phase, its decrease causes the ...

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  • Efficient removal of phosphate impurities in waste

    PG was used as a retarder and mixed with clinker to produce cement. The cement used in this research was produced by grinding clinker and 5% PG samples to a fineness of 330–340 m 2 /kg (Blaine). Hereafter, the cement made from untreated PG and clinker was named PGC, and the cement made by 1% H 2 C 2 O 4 purified PG and clinker named PPGC. 2.4 ...

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  • Calcium Aluminate Clinker, Calcium Aluminate Cement, High

    The composition of the main phase is C12A7, C3A, C2S. Calcium Alumina Clinker / Cement has great features such as Low melting point, low Melt dreg viscidity, high mobility, short time become dreg High dreg and material sulphur, good desulphurization, dephosphorization, deoxidation, impurity absorption

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  • Optimization of Process Parameters for the

    High level of phosphorous in steel production will cause the steel produced to be brittle and can easily crack hence the need for its dephosphorization. Heat treatment and subsequent leaching is a way for up-grading high phosphorus iron ores (Field el al, 1968, Gooden et al, 1974; Muhammed and Zhang, 1989, Kokal, 1990; Aranjo et al, 1994; Cheng ...

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  • Phase Identification of Crystal Precipitated from Molten

    the dephosphorization process is a multicomponent system consisting of not only CaO, SiO 2, and P 2O 5, but also FeO x and other minor components. It should be noted that the C2S compound formed in cement clinker or liquid slag accepts to some extent various types of doping elements, including Fe2 + and Fe3, which affect the stable C2S ...

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  • Phosphorous Control in Induction Furnace Steel Melting

    Phosphorus makes steel susceptible to embrittlement during heat treatment and leads to poor electrical properties [5,6].Dephosphorization is favoured by low temperature, high oxygen content in the metal bath and high slag fluidity [8].For this reason IF produced steel is again often taken to other secondary furnaces for purification.

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  • KIT Research Environmental Technology Nutrient

    Due to the direct combustion of sewage sludge in a rotation furnace, the cement clinker is in close contact with flue gases and ashes. As a result of the standard precipitation practice in municipal sewage treatment plants, sewage sludge contains high concentrations of phosphorus that enter the cement clinker via the combustion process.

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  • Composition of cement

    Composition of cement. Introduction Portland cement gets its strength from chemical reactions between the cement and water. The process is known as hydration.This is a complex process that is best understood by first understanding the chemical composition of cement.

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  • TW201038744A Method for reclaiming iron and phosphorus

    Disclosed is a method for reclaiming iron and phosphorus from steelmaking slag, which comprises a first process, in which steelmaking slag that contains phosphorous, such as dephosphorization slag, is reduction treated using a reducing agent, such as carbon, Si, or Al, to reduce and recover iron oxides and phosphorus oxides in the slag as phosphorus-containing molten steel, a second process ...

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  • Efficient removal of phosphate impurities in waste

    PG was used as a retarder and mixed with clinker to produce cement. The cement used in this research was produced by grinding clinker and 5% PG samples to a fineness of 330–340 m 2 /kg (Blaine). Hereafter, the cement made from untreated PG and clinker was named PGC, and the cement made by 1% H 2 C 2 O 4 purified PG and clinker named PPGC. 2.4 ...

    Get Detail
  • Phase Identification of Crystal Precipitated from Molten

    the dephosphorization process is a multicomponent system consisting of not only CaO, SiO 2, and P 2O 5, but also FeO x and other minor components. It should be noted that the C2S compound formed in cement clinker or liquid slag accepts to some extent various types of doping elements, including Fe2 + and Fe3, which affect the stable C2S ...

    Get Detail
  • Phosphorus removal by blast furnace slag and cement

    A local gravel, typically used in constructed treatment wetlands, was used as a control medium. The experiments examined the removal of phosphorus from a solution initially containing 4 mg P/L. The slag and clinker were nearly 100% efficient due to very high sorptive capacities. The control gravel medium removed 50% of the influent phosphorus.

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  • Effect of gypsum dosage on the hydration and strength of

    Compared to the normal case of ordinary Portland cement, its 1 d compressive strength is a little bit lower. Compared to the ACSA clinker synthesized with the secondary heat treatment method in Ref. , , the compressive strength of 1d in this clinker is poor. Less amount of ye’elimite synthesized in this clinker could be the main reason.

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  • Recovery of Manganese and Phosphorus from

    First, reserves of high manganese and phosphorus content resources are very limited. Second, industrial processes for mining, producing, and distributing can cause environmental and uneconomical problems. Therefore, as a secondary resource, steelmaking slag could be an important alternative because of high manganese and phosphorus content.

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  • KIT Research Environmental Technology Nutrient

    Due to the direct combustion of sewage sludge in a rotation furnace, the cement clinker is in close contact with flue gases and ashes. As a result of the standard precipitation practice in municipal sewage treatment plants, sewage sludge contains high concentrations of phosphorus that enter the cement clinker via the combustion process.

    Get Detail
  • TW201038744A Method for reclaiming iron and phosphorus

    Disclosed is a method for reclaiming iron and phosphorus from steelmaking slag, which comprises a first process, in which steelmaking slag that contains phosphorous, such as dephosphorization slag, is reduction treated using a reducing agent, such as carbon, Si, or Al, to reduce and recover iron oxides and phosphorus oxides in the slag as phosphorus-containing molten steel, a second process ...

    Get Detail
  • Materials Prepared with Phosphorous Bearing Clinkers

    Phosphorus has a significant effect on the hydration performance of cement, such as the hydration rate of cement clinker, and the strength of cement-based materials [1–5]. Phosphorus in cement usually comes from two sources; one is phosphorus introduced in the raw materials for cement production or alternative fuels [6–8], and the other is the

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  • Does phosphorus affect the industrial Portland cement

    Nov 10, 2018 In fact Portland clinker typically contain around 0.2 wt% of P 2 O 5. Most of the studies agree to show that higher phosphorus contents in clinker favors the formation of belite (C 2 S) and free lime to the expense of alite (C 3 S) . As alite is the main hydraulic compound of Portland cement and the most reactive phase, its decrease causes the decrease of the amount of its hydration product, calcium …

    Get Detail
  • The effect of phosphate on the constitution and hardening

    Formulae are given from which the percentage of compounds present in the clinker can be calculated, and the procedure for determining the proportion of clay in the raw mix is described. Test data on concrete are given; cement high in P 2 O 5 is affected more markedly than normal cement by an increase in water: cement ratio.

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  • Does phosphorus affect the industrial Portland cement

    Phosphorus has a significant effect on the hydration performance of cement, such as the hydration rate of cement clinker, and the strength of cement-based materials [1][2][3][4][5].

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  • The Effect of Phosphate on the Constitution and Hardening

    The effect of phosphorus pentoxide on the burning of Portland-cement clinker and the setting and hardening of the resultant cement has been investigated, using both synthetic mixtures and the raw ...

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  • Dephosphorization of Iron Ore Bearing High Phosphorous by

    The integrated process, which combined the carbothermic reduction assisted with microwave irradiation followed by milling and magnetic separation, was investigated as a potential approach for...

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  • Mechanism of phosphorus removal in beneficiation of high

    Many researchers focus on the dephosphorization of high phosphorus-containing oolitic hematite ore by adding a large amount of additive during the reduction process [27, 28]. For example, reduced ...

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