how to obtain solution for calcium in furnace slag

Contact Us: cdche@xinhaimining.net

Calcium Extraction from Blast-Furnace-Slag-Based Mortars ... - MDPI

Jan 10, 2018 ... in the pore solution forces the dissolution of calcium hydroxide and calcium–silicate–hydrate gel and decrease the alkalinity of the pore solution [12,13]. Calcium leaching also causes the increased porosity, and permeability of material and the reduction of concrete strength [2,11]. Both blast furnace slag...

Read More

Phosphate Removal from Aqueous Solutions Using Calcium Silicate ...

depleted in the near future. Herein, we report phosphate removal from aqueous solution using a calcium ... KEY WORDS: blast furnace slag; calcium silicate hydrate; phosphorus; materials recycling; adsorbent. the removal and recovery of .... solution was obtained, suggesting that all slag-derived metals were fully dissolved.

Read More

Two-way Valorization of Blast Furnace Slag: Synthesis - NCBI - NIH

Feb 21, 2017 ... Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent. Evangelos ..... The lower qe values (Figure 4a), and consequently, the more conservative Ni adsorption estimate of the pH-adjusted solution, can thus be obtained. The techniques...

Read More

Blast Furnace Slag - Material Description - User Guidelines for ...

Additional information on processed blast furnace slag use in the United States can be obtained from: National Slag Association .... (12) When this yellow leachate is exposed to oxygen, the sulfides present react with oxygen to precipitate white/yellow elemental sulfur and produce calcium thiosulfate, which is a clear solution.

Read More

leachate from blast furnace slag - National Slag Association

The following is a brief description of Blast Furnace Slag chemistry and the phenomenon of leaching as it relates to this ... silicates and alumino-silicates of calcium and other bases that is developed in the molten condition ... Leachate can be described as a solution or product that is obtained when a solid material has been...

Read More

A novel conversion process for waste slag: synthesis of calcium ...

A novel conversion process for waste slag: synthesis of calcium silicate hydrate from blast furnace slag and its application as a versatile adsorbent for water purification ... The use of concentrated protonic acid facilitated an easy dissolution of BFS, and the subsequent addition of aqueous NaOH solution at 100 °C yielded a...

Read More

5.1 Introduction: blast furnace slag and steel furnace slag ...

GGBS is probably the most applicable product in the cement industry. For slag cement production, GBS can be ground separately or together with Portland cement clinker and calcium sulphate [1]. Usually, GGBS is ground to a fineness exceeding that of ordinary Portland cement to obtain an increased early strength.

Read More

Leaching of Metal Ions from Blast Furnace Slag ... - Semantic Scholar

Nov 25, 2016 ... mineralization and rejecting metal ions that were not useful to obtain pure CaCO3 (as confirmed by. XRD analysis). ... Keywords: blast furnace slag; CO2 mineralization; calcium leaching. 1. ... acetic acid solution (~pH 4), and then the precipitate and silica gel were separated after the reaction. Acid was...

Read More

Stabilization of mercury using waste ladle furnace slag: Journal of ...

May 2, 2013 ... Poon and coworkers (1985) have observed that the retaining potential of mercury in the cement matrix is related to the amount of calcium content in the .... In order to activate the LF slag, NaOH (Merck analytical grade NaOH pellets were dissolved in pure deionized water to obtain a 2 M NaOH solution) and...

Read More

Characterisation of magnesium potassium phosphate cements ...

fly ash (FA) or ground granulated blast furnace slag (GBFS) to reduce heat evolution, water demand and cost, were assessed using compressive strength, X-ray ... The chemical reaction resulting in the formation of MKPCs (Eq. (1)) is based on the dissolution of MgO and KH2PO4 reacting in solution to form struvite-K...

Read More

Activation of ground granulated blast furnace slag by using calcined ...

furnace slag (GGBS). In this study natural dolomite, as a source of MgO and CaO, was calcined at. 800°C (D800) and 1000°C (D1000) under air. The activation of GGBS with the calcined dolomites was investigated using compressive tests, pH measurement of pore solutions, powder X-ray diffraction (XRD) and...

Read More

For citation information please see http://www.claisse.info/Publish.htm

hydration mechanisms of blended Grounded Granulated Blast Furnace Slag (GGBS) pastes. The compressive ... setting times, the alkalinity of the raw materials and the pore solution, and the volume stability were measured ... Compared to OPC, slag has a higher silica content and lower calcium content, and contains low...

Read More

Carbonation of minerals and industrial by-products for CO 2 ...

After separating silica out of the solution, CO2 is introduced and calcium carbonate formed, which precipitates: )(. 2)( .... Precipitation of calcium carbonates from solutions prepared from blast furnace slag ... In order to find a suitable solvent for leaching magnesium from serpentinite for subsequent production of magnesium.

Read More

UG-Mat Blast Furnace Slag | Recycled Materials Resource Center

Blast Furnace Slag - Material Description. ORIGIN. In the production of iron, iron ore, iron scrap, and fluxes (limestone and/or dolomite) are charged into a blast furnace along with coke for fuel. The coke is combusted to produce carbon monoxide, which reduces the iron ore to a molten iron product. This molten iron product...

Read More

Effect of Air-Cooled Slag and Granulated Blast Furnace Slag ...

Geopolymer was made by mixing fly ash and air cooled slag or granulated blast furnace slag in certain ratio with alkali activator solution. The aim for this study is to obtain the best ratio of slag to fly ash binder that produces the highest compressive strength. The best compressive strength was 29.80 MPa achieved in fly...

Read More

Performance and Behaviour of Ground Granulated Blast Furnace ...

Aug 4, 2016 ... This paper deals with the behaviour of geopolymer concrete using ground granulated blast furnace slag and steel fibre to compare with M40 grade cement concrete. The cast GPC specimens were placed in a hot curing chamber at 60C temperature for 24 hours and tested after 1, 7, 14, and 28 days of...

Read More

Ground Granulated Blast Furnace Slag - Springer Link

The granulated slag is further processed by drying and then ground to a very fine powder, which is GGBS (ground granulated blast furnace slag) cement. ..... was obtained as compared with that of normal PC concrete (Aldea et al., 2000; ..... that calcium sulfate had a different effect on chloride binding and the pore solution.

Read More

Physical, chemical, and mineralogical characteristics of blast ...

A partial replacement of Portland cement (PC) by ground granulated blast furnace slag (GGBFS) is an effective method to ... thermodynamic equilibrium between hydration products and pore solution, ionic adsorption on C-S-H, multi-component ... calcium alumino silicate hydrate (C-A-S-H) influence on the ionic transport...

Read More

Development of a new pH-swing CO2 mineralization ... - info.ornl.gov

A new CO2 mineral sequestration process using the pH swing of a weak base–strong acid solution was proposed. In this process, an ... Calcium ions were extracted selectively from steelmaking slag using an ammonium chloride solution, and the reacted solution ..... Blast Furnace Slag and Steel Slag) is estimated to be.

Read More

The influence of the blast furnace slag replacement on chloride ...

The results showed that blast furnace slag improved chloride penetration resistance, resulting in concrete which was less vulnerable to corrosion. .... mixtures blended with blast furnace slag were obtained using a Gaussian error function (equation 3) which provides a solution to Fick' s second law for the transient condition.

Read More

CPC Definition - C04B LIME, MAGNESIA; SLAG; CEMENTS ...

Physico-chemical aspects of methods for obtaining mortars, concrete, artificial stones or ceramics , e.g. for delaying the setting time of mortar compositions. ...... Hydraulic cement containing metallurgical slag,. Examples of metallurgical slag : blast furnace slag .;. STEELMAKING SLAGS. L.D. slags, (as such not suited as...

Read More

Concrete with Steel Furnace Slag and Fractionated ... - ICT Apps

Steel furnace slag (SFS) is an industrial by-product material that can contain free calcium oxide (CaO) and free magnesium oxide (MgO), both of which can ... pavement, RAP, steel furnace slag, SFS, electric arc furnace slag, ... three SFS FRAP samples were obtained from Tollway projects around Chicago, Illinois, and.

Read More

Basic oxygen furnace slag, Dephosphorization, Wet magnetic ...

Abstract 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, Al2O3, SiO2 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...

Read More

SEM Characterization of Alkali Activated Slag

one is the activation of industrial by-products such as fly ash and blast furnace slag with a mild alkaline solution and calcium silicate hydrate (C-S-H) as the main reaction product. The second one is the alkali ... and analysis were obtained by using energy dispersive X-Ray spectroscopy (EDS) on the specimens. The SE...

Read More

PORTLAND BLAST FURNACE CEMENT (PBFC) | Lafarge Malaysia ...

Solutions of naturally occuring sulphates of sodium, potassium, calcium or magnesium, as may be present in some soils and groundwaters, can cause expansion and disruption of concrete due to their reaction with C3A content in the cement.Concrete made with blast furnace slag cement had a lower content of cement thus...

Read More

Preparation of concrete mixtures with electric arc furnace slag and ...

Once the results of the characterization tests and their correspondence with the Colombian technical standards have been obtained, it has become possible to select the use of the Transparent Recycled Ground Glass (TRGG) as the most suitable for the replacement of the sand in the dosage of new mixtures modified...

Read More

Microwave Activation of Electric Arc Furnace (EAF) Slag for Stren ...

Electric Arc Furnace (EAF) steelmaking slag is a bulk solid waste in the mini mill, which is potentially harmful to the environment. In this study, the characterizations of EAF slag were studied, such as chemical composition, particle size distribution, crystalline phases and thermal behavior. Calcium extraction from the EAF slag...

Read More

Adsorption of Phosphate from Aqueous Solution with Blast Furnace ...

This paper describes a method of removing phosphate (P) from aqueous solution by sorbent prepared with amorphous blast furnace slag (BFS) and hydrated lime. An orthogonal experiment was carried out to investigate the factors of hydration time, slurrying temperature and the weight ratio of blast furnace slag /hydrated...

Read More

TEM and SEM Characterization of Alkali Activated Slag ...

Alkali-activated materials are considered third-generation binders after lime and ordinary Portland cement (OPC). There are two main families of alkali activated binders: the first one is the activation of industrial by-products such as fly ash and blast furnace slag with a mild alkaline solution and calcium silicate hydrate...

Read More

Optimizing the Use of Fly Ash in Concrete - The Portland Cement ...

include ground granulated blast furnace slag and fly ashes with high calcium contents (such fly ashes .... the fly ash, the calcium content is also useful in predicting how effective the fly ash will be in terms of reducing ... be very reactive as the alkalis raise the pH of the pore solution when they are mixed in concrete and the...

Read More

mechanical properties of alkali-activated materials based on blast ...

blast furnace slag (GGBFS), steel slag, phosphorus slag, fly ash, bauxite residue, among others1. In some cases ... activator solution (molar ratio SiO2/Na2O) is an important parameter for mechanical strength and is usually ... properties of AAMs, focussing solely on pastes based on GGBFS and calcium sulphate dihydrate.

Read More

Effects of Ground Granulated Blast Furnace Slag in Portland Cement ...

Effects of Ground Granulated Blast Furnace Slag in Portland ... Slag cement is a byproduct of the iron-making process and is composed primarily of silica and calcium. In fine particle form, slag cement displays cementitious qualities ... this material, the rate of strength gain will be lower when compared to OPC concrete.

Read More

Removal of iodide ions from aqueous solution by electric arc furnace ...

Wu et al. applied calcium alginate - silver chloride composite as adsorbent for removing iodide ions from aqueous solution with maximum capacity 1.1 mmoL/g [11]. In this work, electric arc furnace slag is considered as adsorbent for uptake of iodide ions. The adsorbent used in this study has several advantages: (1) easy to.

Read More

Slag Cement - Lehigh Hanson

Jun 1, 2015 ... Slag Cement. Chemical name: Calcium compounds, calcium silicate compounds, and other calcium compounds containing iron and aluminum make up the ... Granulated Blast-Furnace Slag, GGBFS, Iron Slag Cement, Granular Pig Iron Slag Cement, .... not get slag cement inside boots, shoes or gloves.

Read More

Chemical acceleration of a neutral granulated blast-furnace slag ...

furnace slag activated using sodium carbonate. ... slag cements containing neutral GBFS and sodium carbonate as activator at room temperature ... solutions. Tap and distilled water was used to prepare alkaline solutions for AAS concretes and pastes respectively. Sodium hydroxide flakes (98.5% purity), OPC CEM I 52.5N,...

Read More

GGBS – Ground Granulated Blast Furnace Slag – Vadraj Cement

GGBS is a hydraulic binder, i.e. a cement, which has been known and used for 150 years. It improves the quality & durability of Concrete, & its production is virtually CO2 free. To ensure its activation, GGBS is most often used with normal cement. It will typically replace 25%-70% of cement on an equal basis. Vadraj GGBS is...

Read More

Ground Granulated Blast Slag (GGBS) In Concrete ... - IOSR Journals

Ground Granulated Blast furnace Slag (GGBS) [1] is a by product from the blast furnaces used to make .... By comparison, a 50 % GGBS concrete will typically achieve about 45 to 55 % of its 28 day strength at ... The more soluble product of hydration (Calcium hydroxide) migrates through the pore solution and precipitates.

Read More

US5605570A - Alkali-activated glassy silicate foamed concrete ...

The invention pertains to a cementious composition of a strong, light, foamed silicate binder or concrete made from ground, calcium-rich glassy silicates that are the major component of blast-furnace slag. The other materials used to create the material are sodium peroxide and water. The cementious mixture can include a...

Read More

Acid neutralization using steel slags - DiVA portal

from an aluminium reduced steel melt and a slag from a silicon reduced steel melt from the AOD converter in Xinhaien. The silicon reduced steel melt slag showed an increase of fluorides in the solution, due to the presence of calcium fluoride in the slag. This was observed for all temperatures. The aluminium reduced...

Read More

Microstructure, strength, and reaction products of ground granulated ...

Mar 3, 2011 ... Microstructure, strength, and reaction products of ground granulated blast-furnace slag activated by highly concentrated NaOH solution - Volume 9 Issue 1 ... The C-S-H (calcium silicate hydrate) phase is proposed to consist mainly of structurally imperfect layers of tobermorite, interleaved with layers of (C,...

Read More