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magnetic separation of mgo and cao

the preparation of high purity mgo and precision

the preparation of high purity mgo and precision

Apr 21, 2020 · It is difficult to prepare high purity MgO from dolomite due to the separation of Mg and Ca using acids. U.S. Patent (4370422) states a process of adding calcined dolomite to brine as a source of MgO and CaO and mixing at a molar ratio of (MgO + …

the separation of lime from dolomite1 - schurecht - 1921

the separation of lime from dolomite1 - schurecht - 1921

ABSTRACT. Calcination.—Magne ium carbonate in dolomite is decomposed by calcining for one hour at 800°C. Calcium carbonate is not completely decomposed until after calcination at 960°‐1040°C for one hour. Treatment with sulphuric acid.—By adding sufficient H 2 SO 4 to milk of dolomite to react with the lime present, a bulky precipitate of Mg (OH) 2 is formed which may …

separation and recovery of iron and nickel from low-grade

separation and recovery of iron and nickel from low-grade

Nov 01, 2020 · The MgO x CaO y SiO 2 group was gradually formed from the MgO x CaO y FeO 2−x−y SiO 2 phase with an increase in duration time. The process may occur as follows: the MgO x FeO 2− x SiO 2 group can be initially reduced to a transition phase (MgO x CaO y FeO 2− x − y SiO 2 ) and then further reduced to the MgO x CaO y SiO 2 group

sequential particle-size and magnetic separation for

sequential particle-size and magnetic separation for

Feb 01, 2020 · The enrichment factor and REY recovery in the magnetic separation step were 1.12 and 91.64 %, respectively. Overall REY recovery for the sequential separation process was 71.21 %, with an overall enrichment factor of 1.23. Sieving followed by magnetic separation effectively decreased the Fe 2 O 3 and CaO contents of this fly ash

synthesis of magnetic graphene oxide (mgo) and auxiliary

synthesis of magnetic graphene oxide (mgo) and auxiliary

Currently, thermal oil recovery methods are commonly applied to heavy oil development. Microwave heating is an effective recovery method and has the advantages of rapid heat transfer, volumetric heating, and selective heating. In the process of using microwaves to extract heavy oil, catalyst-assisted microwaves for oil viscosity reduction are adopted. In this study, magnetic …

beneficiation and mineral processing of magnesium minerals

beneficiation and mineral processing of magnesium minerals

Mar 29, 2016 · However, by removing the magnesium vapour as it is produced, the reaction goes to completion. The silica combines with calcium oxide to form the molten slag, calcium silicate: CaO (s) +SiO2 (s) SCaiO3(l) The process gives magnesium with up to 99.99% purity, slightly higher than from the electrolytic processes. 22 23

effect of mgo and mno on phosphorus utilization in p

effect of mgo and mno on phosphorus utilization in p

Abstract. In order to recycle the phosphorus in P-bearing converter slag and make it used as slag phosphate fertilizer, the effect of MgO and MnO in P-bearing steelmaking slag on phosphorus existence form, P 2 O 5 solubility and magnetic separation behavior were researched systematically. The results show that the phosphorus in slag is mainly in the form of n2CaO · …

waste to wealth: recovery of value-added products from

waste to wealth: recovery of value-added products from

May 18, 2021 · The iron values can be recovered by magnetic separation, leaching, crushing and sorting, reduction among others. Magnetic separation is the most ubiquitously method used for iron recovery. ... (3CaO.SiO2), RO-phase (CaO-FeO-MnO-MgO), calcium ferrite (2CaO.Fe2O3), brownmillerite among others . Calcium contributes to the basicity and binding

(pdf) preparation of magnesium oxide (mgo) from dolomite

(pdf) preparation of magnesium oxide (mgo) from dolomite

High purity MgO is widely used in various fields as an important magnesium compound. The separation of Mg and Ca is of great importance for the preparation of …

us7771682b2 - process for the preparation of magnesia (mgo

us7771682b2 - process for the preparation of magnesia (mgo

The process provides for the preparation of MgO from the reaction of magnesium salt and alkali/lime. The crude Mg(OH) 2 is directly calcined and then treated with water to disintegrate the mass spontaneously to yield a slurry and dissolve away the soluble salts. This slurry is much easier to filter and wash than the original Mg(OH) 2 slurry, which helps to speed up the …

cn104185687b - the method separating and reclaiming ferrum

cn104185687b - the method separating and reclaiming ferrum

The method that the present invention relates to be enriched with in the nonmetal waste residue produced from the refining process of the such as non-ferrous metal of copper, zinc and lead etc. and reclaim ferrum individually, the method relating more particularly to be enriched with in the nonmetal waste residue produced from the refining process of the such as non-ferrous metal …

crystallization control for remediation of an feto-rich

crystallization control for remediation of an feto-rich

Crystallization control for remediation of an FetO-rich CaO-SiO2-Al2O3-MgO EAF waste slag. ... The growth of this spinel phase caused a clear compositional separation from amorphous phase during isothermal cooling at 1473 K leading to a clear separation between the primary and amorphous phases, allowing an efficient magnetic separation of Fe

feasibility study of dephosphorization of slag generated

feasibility study of dephosphorization of slag generated

Jun 02, 2017 · Basic oxygen furnace slag (BOF slag) is an unavoidable by-product of steelmaking process of basic oxygen furnace. The main chemical constituents of BOF slag are CaO, FeO, Al 2 O 3 , SiO 2 and MgO. Due to its high metallic value (FeO: 16-20%) and lime content (CaO: 45-50%), it is possible to use in iron making and steelmaking process to replace lime and recover iron and CaO

structural characteristics and hydration kinetics of

structural characteristics and hydration kinetics of

Feb 25, 2019 · Pre-magnetic separation was utilized to remove magnetic iron-containing substances like entrapped iron droplets and magnetite, etc. The slag which had been subjected to the following treatments was referred to as the raw slag: homogenized, quartered, milled down to 0.3 mm and magnetically separated to reduce the amount of metallic iron

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