granulation slag heap

(PDF) Waste Heat Recovery from Molten Slags

To recover heat of the viscous slag chemically, the strongly endothermic reaction CH4+H2O →3H 2+CO was selected and then the property of dry granulation of the molten slag by Rotary Cup Atomizer ...

New process for dry granulation and heat recovery from …

Granulation Granulated slag Blast furnace slag Heat recovery Dry treatment Keyword (de) Granulation Granulierte Schlacke Hochofenschlacke Waermerueckgewinnung Trockenverfahren Classification Pascal 001 Exact sciences and technology / 001D Applied sciences / 001D11 Metals.

Breaking boundaries in slag waste heat recovery: Review and …

As the largest output of solid waste in the ISI, the production of blast furnace slag (BFS) by the blast furnace method exceeded 1.279 billion tons with extremely high temperature of 1500~1600 ℃ based on the global iron production estimation in 2022 (Duan et al., 2024b).The slag contained total residual waste heat of 7.55×10 8 GJ, equivalent …

(PDF) RECENT DEVELOPMENTS IN DRY SLAG GRANULATION…

Molten slag from pyrometallurgical furnaces is tapped at high temperature, carrying a large amount of thermal energy. But the common slag dumping and water granulation methods used for slag ...

Centrifugal Granulation of Molten BF Slag in Film …

In order to recover the thermal energy in molten BF slag, a number of dry granulation techniques, combined with methods for heat recovery were proposed, e.g., the …

Experimental investigation of glass content of blast furnace slag …

Dry granulation, as a new process of molten blast furnace slag (BFS) treatment, is an attractive alternative to water quenching. The performance of BFS obtained from dry granulation must be assessed. The glass content, which is a significant factor to evaluate the performance of BFS as a replacement material for Portland cement, was …

Outotec SAF Smelting

Outotec Slag Granulation Typically, slag is granulated by using water sprays during tapping. Granulation is a cost-effective way to process slag for further usage. Because the granulation process uses water recycled from other water circuits in the plant, fresh water intake is minimized. Outotec Furnace Lining Monitoring System

Granulation and Heat Recovery from Metallurgical Slags

Slag granulation with heat recovery is an essential and emerging technology for sustainable metal production. This technology has been developing for a few decades with much …

Experimental investigation on molten slag granulation for …

For copper slag granulation, the main mass fraction peak moved to the range of small diameter with an increase in rotating speed. In metallurgical slag granulation, the particle size tended to be uniform with an increase in rotating speed. It is necessary to enhance the rotating speed to improve heat transfer between slag …

Experimental investigation on granulation characteristics …

The molten slag granulation mechanism in the gas quenching granulation technique has been rarely reported. The granulation characteristics, waste heat recovery and the relationship between them have not been made a profound study with different airflow velocity and different molten slag mass flow rate. In the present study, the …

A review of waste heat recovery technologies towards molten slag …

Highlights The granulation and heat recovery technologies towards molten slag of steel industry are reviewed. The working principle, research status, challenges and prospects of these technologies are analyzed. Centrifugal granulation combined with chemical heat recovery is the most perspective method among all technologies.

HEAT EXCHANGE IN THE GRANULATION CHAMBER OF …

Thus, the procedure of wet granulation of slag is very inefficient both from the environmental and en-ergetic points of view. In foreign countries, the investigations of the possibility of dry granulation of slags are carried out for a long time. According to this procedure, hot slags contact with cooling gases (in particular,with air) [6–10].

Development of Heat Recovery From Blast Furnace Slag …

A considerable amount of heat energy is contained in the molten slag tapped from blast furnace.At present,the BF slag is treated by impinging much water for granulation and the energy is wasted without recovery.Thus,dry granulation technology has attracted more and more attention.The basic problems and technical difficulties of dry granulation were …

Production of artificial aggregates from steel-making slag: …

Steel slag is an alkaline residue, generated from steel-making industry; ... Granulation was conducted in a customized pan granulator. The granulator is 700 mm in diameter and 200 mm in collar height (Fig. 4 a), with a scraper stuck to the bottom surface and a feeding hopper connected at the glass cover (Fig. 4 b). The revolution speed for ...

Granulation and Heat Recovery from Metallurgical Slags

In this paper, the slag granulation and heat recovery options are reviewed and given a critical evaluation, aiming to provide a basis for future directions in slag …

Heat recovery in dry granulation of molten blast furnace slag …

In a research and development project undertaken jointly between Ishikawajima-Harima Heavy Industries Co. and Sumitomo Metal Industries, Ltd., a process has been developed for granulating molten slag discharged from blast furnaces, to produce granules utilizable as fine aggregate in the preparation of concrete, while at the same time ensuring …

Simulation of Motion and Heat Transfer Characteristics of

In the process of gas granulation of blast furnace slag, a cyclone separator serves to cool slag particles and separate them from hot air. This study focuses on modelling the cooling of slag particles in a cyclone separator. Simulations revealed the airflow field, temperature field and particle trajectory distribution within the cyclone …

Dry Slag Granulation – The Future Way to Granulate …

dry slag granulation pilot plant is outlined below: Process Air Supply A radial fan is installed to supply the granulator and the various air cooling chambers with process air. Based on the thermal balance of the granulator an air amount of maximal 180,000 Nm³/h is provided to cool the granules down to target temperature. This air amount and ...

Heat Recovery from Slag through Dry Granulation

granulation/heat recovery operation has been developed, shown schematically in Figure 4. In this process, the molten slag is first atomised in a dry granulator to produce fine slag droplets, which are

Advanced Tech for Efficient By-Product Recycling

Dry slag granulation with heat recovery. Primetals Technologies, voestalpine Stahl, the FEhS – Building Materials Institute and the University of Leoben joined forces in an R&D program to develop a new dry …

Blast Furnace Slag Granulation at the Cast House – IspatGuru

Fig 4 Schematic diagram of a slag granulation plant. Granulation section – Here, the liquid BF slag is water quenched and solidified into small particles, eliminating the need for heavy crushing equipment. The liquid slag flows by runners from the BF to the granulation unit. From the runner, the liquid slag stream at around 1,500 deg C is …

HEAT EXCHANGE IN THE GRANULATION CHAMBER OF …

Schematic diagram of an installation for the dry granulation of slag: 1 — channel for the supply of liquid slags; 2 — rotat-ing cup; 3 — wall of the granulation chamber; 4 — …

Development of molten slag dry granulation and heat

After granulation process is determined, the granulation water system will be defined, it has three types: granulation water is directly used in slag granulation, granulation water is cooled by ...

DRY SLAG GRANULATION WITH HEAT RECOVERY

Each year, approximately 400 million tons of blast furnace slag is produced worldwide with a tapping temperature of around 1,500°C. It is normally used as a substitute for cement clinker or as an aggregate material in road construction. Currently, the slag is granulated in wet-granulation plants using large volumes of water and to date, it has …

Granulation and Heat Recovery from Metallurgical Slags

In this paper, the slag granulation and heat recovery options are reviewed and given a critical evaluation, aiming to provide a basis for future directions in slag handling. Metallurgical slags are produced at a massive rate of over 750 Mt/year, and carry a thermal energy equivalent to 40 …

Energy recovery from high temperature slags

Driven by a demand to produce amorphous slag as a substitute to cement and limited by the low thermal conductivity of slag, the majority of methods for energy …

Research status of centrifugal granulation, physical heat recovery …

Physical heat recovery after granulation. Once BF slag with ultra-high temperature are granulated into fine enough droplets, they begin to exchange heat with cooling medium, and the entire heat recovery process can be divided into two stages. First, molten BF slag droplets rapidly crust on the surface during the flight due to the cooling …

Traduction slag en Français | Dictionnaire Anglais-Français

The slag is then transported to the production site.: La scorie est alors transportée vers le site de production.: The metal phase is purified by dissolution of impurities in the slag.: Les impuretés se dissolvant dans la scorie, la phase métallique est purifiée.: An activator then is added to the ground granulated slag.: Un activateur est ensuite ajouté au laitier broyé, …

Research status of centrifugal granulation, physical heat …

Physical heat recovery after granulation. Once BF slag with ultra-high temperature are granulated into fine enough droplets, they begin to exchange heat with …