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Process & Products >Products >Slag Products
Ferronickel slag is a useful resource acquired through smelting of nickel ore and bituminous coal used in producing ferronickel at a high temperature before it was separated from ferronickel. Steel slag is environmentally friendly raw material with excellent physical and chemical properties and used as substitute for natural resources such as concrete aggregates, molding sand, abrasives, and serpentine while contributing to preserving resources and environment. The ferronickel slag has been used in diversified ways in advanced countries including Japan and New Caledonia in addition to Korea for a long time.
Ferronickel slag is classified into prime stones produced through natural air-cooling of smelting slag and prime sand made through rapid cooling based on sprayed water.
It is a product made in the form of a gravel through gradual cooling based on natural air-cooling of smelting slag. It boasts of excellent compaction rate at a time of being used as civil engineering aggregate.
UsageAggregates, roadbed ash, asphalt aggregate & substitutes for caisson fills
It is a product made in the form of sand through spraying of water on to smelting slag.
As it has better properties than natural sand, it can be used as concrete sand.
UsageAggregate, substitutes for caisson fills, concrete aggregate, asphalt aggregate, electric furnace filler, molding sand & abrasives
Ferronickel slag is rich in silicon and magnesium and recycled as substitutes for serpentine and civil engineering aggregate.
(Unit : wt%)
| SiO2 | MgO | T-Fe | Al2O3 | CaO |
|---|---|---|---|---|
| 53.45 | 35.50 | 4.50 | 1.45 | 0.65 |
Although ferronickel slag contains diverse chemical components, it is created as stabilized material, so dissolving chemical components are not existent.
(Unit : mg/ℓ)
| Item | Cd | Hg | Cr+6 | Pb | As | CN |
|---|---|---|---|---|---|---|
| Result | Not detected | Not detected | Not detected | Not detected | Not detected | Not detected |
| Standard | 0.3 or lower | 0.005 or lower | 1.5 or lower | 3.0 or lower | 1.5 or lower | 1.0 or lower |
(Source : Jeollanam-do Institute of Health & Environmen)
Ferronickel slag acquired certification to be recycled for various purposes including concrete aggregate construction guidelines, KS and E-mark for road aggregate.
| Distinction | Certifier | Date | |
|---|---|---|---|
| Governmental certification |
KS for concrete aggregate (KS F 2790) | KATS | `09.10.30 |
| E-mark for road aggregate | KEITI | `09.11.26 | |
| E-mark for caisson fills | KEITI | `14.02.24 | |
| Construction Guidelines for Road Aggregate | KSRE | `09.12.30 | |
| Construction Guidelines for Ascon Aggregate | KSRE | `11.02.28 | |
| A construction guide for ferronickel slag fine aggregate concrete | KCI | `11.02.28 | |
| A construction guide for FNS complex slag fine aggregate concrete | KSRE | `14.05.31 | |
| A construction guide for ferronickel slag fine aggregate concrete (Revision) | KCI | `14.06.30 | |
Prime Sand acquired KS F 2790 in order to be used as concrete aggregate, but high chemical stability and non-existence of alkali silica have no effect on concrete aging or steel corrosion. Prime Sand acquired KS F 2790 “Concrete Aggregate (KATS, 2009.10.30),” and high chemical stability and non-existence of alkali silica have no effect on concrete aging or steel corrosion. As specific gravity and measurement and weight by unit are higher than natural aggregate, it can be effectively used as concrete aggregates for maritime construction and basic construction.
(Unit : %)
| Fine Aggregate Mass Percentage | Specific Gravity | ||||||
|---|---|---|---|---|---|---|---|
| 10mm | 5mm | 2.5mm | 1.2mm | 0.6mm | 0.3mm | 0.15mm | |
| 100 | 90~100 | 80~100 | 50~90 | 25~65 | 10~35 | 2~15 | 1.8 |
Dongmak Port in Jindo
Dormitory of Semyung University
SNNC warehouse
7 berths in a raw material quay in
Gwangyang Port
SNNC warehouse
SNNC Coal Yard
If Prime Sand is used as ascon aggregate, it boasts of excellent stability based on KS.
| Distinction | KS | Test Result |
|---|---|---|
| Stability (kgf) | 500 or higher | 717 |
SNNC parking lot
RORO Quay of
Gwangyang Port
A farming & fishing road in
Jinweol-myeon in
Gwangyang City
An access road to 7 berths in
a raw material quay in
Gwangyang Port
Prime Sand acquired E-mark for caisson fills from KEITI and can be used as caisson fills by meeting all items including measure and weight by unit and immersion expansion.
Environmental Product
Declaration
Ecological Toxicity
Test Report
| Distinction | KS | Test Result |
|---|---|---|
| Measurement & Weight by Unit (kg/ℓ) |
1.5 or higher | 1.8 |
| Immersion Expansion Ratio (%) | 1.5 or lower | 0.73 |
Prime Sand is similar to serpentine, natural rocks, in terms of component, and it does not contain asbestos in terms of crystal structure, so they are used as serpentine substitutes by POSCO and Hyundai Steel. Steel Mill in Japan also uses slag supplied from Pacific Metals Co., Ltd. and Sumitomo Corporation as serpentine substitutes.
| Distinction | Prime Sand | Prime Stone |
|---|---|---|
| Asbestos Content | Not Detected | Not Detected |
Source : KTR
As the rate of thermo expansion of prime sand is low, it is appropriate to precise part casting on the back of little heat deflection at a high temperature.
(Unit : %)
| Prime Sand | Domestic Sand | Australian Sand | Vietnam Sand |
|---|---|---|---|
| 0.4~0.6 | 1.2~1.4 | 1.8~1.9 | 1.6~1.7 |
As Prime Stone is excellent in terms of load bearing capacity of sub-grade soils, construction and freezing-thawing resistance, it can be effectively used as road aggregates.
Background land of 7 berths
of a raw material quay of
Gwangyang Port
A farming and fishing road
in Jinweol-myeon in
Gwangyang City
Chilseong-ri in
Gwangyang-eup
As Prime Sand boasts of excellent bearing power, it is used as bottom ash in order to improve soft improvement. As it is similar to sand in terms of component, it can be used as back-fills at a time of laying water and sewage pipes. If slag is used in the understructure of plant sites, schoolyards and golf courses, drainable grounds can be established.
Yeosu Industrial Complex
Shipbuilding, Agricultural
and Industrial Complex
in Hadong-gun
golf course
Chonam Industrial Complex
