Steelmaking Slag for Fertilizer Usage

cate fertilizer made from blast furnace slag began to decrease sharply in the early 1970s. According to Nippon Slag Association's statistics on the use of slag in 2012, the total …

Possible Uses of Steelmaking Slag in Agriculture: An …

refining operation, after steel pouring into a ladle, the slag is poured into a vessel and is subsequently tapped into a slag pot. Fig. 1. The iron ore based steelmaking. The main by-products resulting by ironmaking and steelmaking are slags (that represent 90% of the total by-products), dusts and sludges. On the average about 200 kg of by-

Cropping With Slag to Address Soil, Environment, …

The influence of slag fertilizer on the soil microbiome are diverse and the possible mechanisms of slag-microbes interactions can be as follows: (1) slag fertilizer supplies nutrients not only to the plant but also to soil …

Utilization of Steel Slag as a Soil Amendment and …

Therefore, the use of steel slag as agricultural lime material and/or mineral fertilizer is of great importance (Hemalatha 2013; Wen et al. 2020). The slag formed as a result of the steelmaking ...

Overview of Steel Slag Application and Utilization

Significant quantities of steel slag are generated as waste material or byproduct every day from steel industries. Slag is produced from different types of furnaces with different operating conditions. Slag contains Ferrous Oxide, Calcium Oxide, Silica etc. Physical and chemical properties of slag are affected by different methods of slag solidification such as air cooled, …

Simultaneous Removal of SO2 and NOx from Coal-fired Flue …

A method for simultaneously removing sulfur dioxide (SO2) and nitrogen oxides (NOx) from coke oven flue gas using steel slag slurry was proposed. Due to the high removal efficiency of SO2, the effects of operation conditions on the removal of NOx were investigated emphatically. The results showed that the removal efficiency of NOx increased with an …

Design of a Novel Fertilizer Made from Steelmaking Slag …

Steel Slag as an Iron Fertilizer for Corn Growth and Soil Improvement

The feasibility of steel slag used as an iron fertilizer was studied in a pot experiment with corn. Slag alone or acidified slag was added to two Fe-deficient calcareous soils at different rates. ... A method for directly modifying hot slag and converting it into value-added materials has been developed in recent years. Two kind of hot slag ...

Leaching behavior and microstructure of phosphorus in …

Converter slag is a by-product of the steelmaking process and contains a large amount of Ca, Fe, P and other elements. If the phosphorus in the converter slag can be …

Occurrence of steel converter slag and its high value-added conversion

Based on this, a proposal of comprehensive and circular system converting converter slag into photocatalyst for CO2 reduction and H2 production is crucial for realizing environmental and economic ...

Steel Slag as an Iron Fertilizer for Corn Growth and …

The feasibility of steel slag used as an iron fertilizer was studied in a pot experiment with corn. Slag alone or acidified ... into a fine powder with pH and EC (Rhoades, 1996) being determined ...

BOF Steel Slag: Critical Assessment and Integrated Approach for

During steel production, the impurities in the hot metal react with the fluxes forming the steel slag. Chemical constituents of this steel slag (SS) are relevant to iron/steelmaking or blended cement manufacture. Harmful impurities present in it, however, limit its recycling to these applications. Japan, Europe, and the US consume a significant amount of …

Sustainable Utilization of Steel Slag from Traditional …

Steel slag is a large amount of residual material produced in the process of steel manufacturing. With the requirements of sustainable development in China, the utilization of steel slag has become a hot issue. Through an in-depth study on steel slag, it is apparent that it has been widely used in various fields in recent years. The resource utilization of steel slag is not …

Oxygen-Lime Converter Steelmaking Process | SpringerLink

In double-slag retention process, converting is suspended during smelting, the high-phosphorus slag is discharged, and then lime is added to create the secondary slag. Fluorite is added into the primary slag, so the slag has high-phosphorus content and can be used for producing phosphate fertilizer. Oxygen-lime converter steelmaking process is ...

Steel slag as accelerant in anaerobic digestion for …

Results show that all steel slags collected from different iron and steel companies (slag-1, slag-2, and slag-3) positively affect AD performance in terms of enhancing the biogas yield, methane ...

The Comprehensive Utilization of Steel Slag in …

In China, the first steel slag fertilizer program invested by Taiyuan Iron and Steel Group and Harsco Corporation of the USA started ... refinement, into a ladle and, at the end of the process, to generate ladle steel slag [5]. The steel slags from these two furnaces are very similar. However, ladle steel

Harsco sees slag-to-fertilizer opportunity

"It was a breakthrough when we realized that slag from steel production could be transformed into quality fertilizer for the Brazilian agriculture business. We are proud that this has helped significantly reduce the carbon footprint and are honored to present this on behalf of Minas Gerais [at] the world's most important environmental forum."

From hazardous waste to fertilizer: Recovery of high-value …

Methods for recovering fertilizer components3.2.1. Slag roasting. Sulfuric acid (96%), ammonium sulfate and iron (III) sulfate were used to roast the slag. A slag sample …

Practical aspects of biowastes conversion to fertilizers

The mineral fertilizer industry has never faced such a serious crisis in history as it is today. The price of nitrogen fertilizers increased by 300% in 2021 [].This is related to the very intense increase in natural gas prices (by approx. 200% in 2021) and the dynamic increase of prices of CO 2 emission allowances (an 8-fold increase in the price has been recorded in the …

The Use of Secondary Metallurgy Slag as Soil Corrective in …

For example, BF-BOF route produces ≈200–250 kg of slag (BOFS) per tonne of produced steel. Similarly, steel production by EAF is accompanied by about 100 kg of slag (EAFS) per tonne of steel produced, commonly referred to as black slag due to the high …

Converting ladle slag into high-strength cementing material …

On another note, steel slag is the main by-product from the steel making process, accounting for 15-20% of crude steel (Han et al., 2015, Shi, 2004). Due to the growing demand for steel in the construction sector, the estimated global production of steel slag was around 190 to 280 million tons in 2019 (Mineral commodity summaries 2020, 2020).

Harsco Environmental to Present AgroSilicio a Unique Fertilizer …

AgroSilicio, a product of Harsco Environmental, has developed a low-carbon fertilizer made of recycled steel slag. The steel industry by-product has reduced Brazil's carbon footprint by more than ...

Research on a novel modifying furnace for converting hot slag …

Alternatively, the modified slag can be directly converted into new materials. NKK (Nippon Kokan Kabushiki Kaisha) continuously added feldspar minerals into hot steelmaking slag for preparation of potassium silicate fertilizer. Wang and Liu (2014) used fly ash and quartz sands to modify hot slag to manufacture rock wool.

Structural alterations of humic acid fractions in a steel slag …

Section snippets Fertilizer samples. A basic oxygen furnace slag treated with CO 2 was used in this study, because a significant increase in pH due to the hydration of CaO that occurs when the slag is brought into contact with water is prevented [3]. The inorganic composition of the steel slag (g kg −1) was determined to be, as follows: Si 146, S 10.3, Ca …

In situ stabilization of heavy metals in multiple-metal …

Application of slag increased soil pH, plant-available silicon concentrations in soil, and decreased the bioavailability of metals compared with control treatment, whereas pulverous slag was more effective than granular slag. Steel slag has been widely used as amendment and silicon fertilizer to alleviate the mobility and bioavailability of heavy metals in soil. The …

Research on a Novel Modifying Furnace for Converting Hot Slag …

In 2006, 10-15 million metric ton of steel slag was generated in the U.S. Out of the total steel slag produced in the U.S. every year, about 50-70% is used as aggregate for road and pavement ...

Harsco Environmental to Present AgroSilicio a Unique Fertilizer …

AgroSilicio, a product of Harsco Environmental, has developed a low-carbon fertilizer made of recycled steel slag. The steel industry by-product has reduced Brazil's carbon footprint by more than 80,000 tons, the equivalent of planting 570,000 trees.; Harsco Environmental LATAM regional president to present the solution at the United National …

Silicon elution from three types of steel slag fertilizers in …

All fertilizers in this study were made from steel slag. We analyzed the composition of each fertilizer by glass bead X-ray fluorescence spectroscopy (XRF) which is ordina-rily used to analyze the composition of steel slag. Each fertilizer was crushed by disk mill to make fine powder under 210 μm diameter. Contents of Ca, Si, Mg, Mn, Fe,

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Converting industrial waste into a value-added cement …

Steel slag (SS) is a by-product of the steel production process, accounting for around 15–20% of the total steel quantities (Li et al., 2022; Shi, 2004).Steel use in construction fields is in high demand, as over 1.8 billion tonnes of crude steel were produced in 2019 and is growing in a seemingly constant manner (Li et al., 2022).Intuitively, SS is considered waste …