The most common production method used among direct-reduced iron technologies is cold-bonded composite pellets, prepared by blending iron ores, a carbonaceous material, and a flux using an organic binder [2]. The use of cold-bonded composite pellets continues to increase due to certain advantages such as short reduction time, there being no
Abstract. Blast furnace dust (BFD) and converter sludge (CS) were used as raw materials for preparing of cold bonded pellets (CBPs). The results showed that BFD contained high …
The purpose of this study was to investigate the reduction behavior of cold-bonded composite pellets produced from low-grade hematite iron ore using molasses solution at various concentrations, as well as their physical and chemical properties. Direct-Reduction Iron (DRI) technology makes it possible to assess low-grade iron ores and convert them into …
Curing time is very short (5-10 min), It utilizes iron ore micro-fines and coal fines or coke fines or carbon containing waste fines in iron making or sintering, The micro-pellets provide energy to the sinter bed for reduction in coke breeze consumption. 38-48 % reduction in coke breeze has been found when 38 % blast furnace flue dust ...
There is a significant and necessary drive towards reducing CO 2 emissions produced by iron and steelmaking industries. Binding Solutions Ltd has developed a technology to contribute to the reduction of CO 2 in the short and long term, by introducing a cold-bonded iron ore pellet to the furnace burden. Binding Solutions' cold-agglomerated pellets, …
MinRes, a top five Australian iron ore producer, has the right to licence the BSL technology to manufacture cold-bonded pellets from iron ore at its own mines. The leading mining services provider is the preferred builder of BSL pellet plants in global markets and will provide design, engineering, project
Cold-bonded composite pellets, consisting of iron ore fines and fines of noncoking coal or char, were prepared by steam curing at high pressure in an autoclave employing inorganic binders.
Binder is a necessary part in cold-bonded pellets, which could enable the pellets to survive in subsequent handling. A new type of silica-alumina oxide inorganic binder was employed in this study. The preparation of pellets was researched and optimized through single factor experiment. The microstructure of pellets was observed by SEM-EDS and OM.
Composite briquettes containing high-phosphorus oolitic hematite and coal were produced with a twin-roller briquette machine using sodium carboxymethyl cellulose, molasses, starch, sodium silicate, and bentonite as binders. The effect of these binders on the strength of the composite briquettes, including cold strength and high-temperature strength, was …
Iron Ore Pelletization Technology and its Environmental Impact Assessment in Eastern Region of India – A Case Study. Harsha Vardhan. Procedia Earth and Planetary Science, 2015. ... These pellets were cold bonded so that carbon is retained for- reduction purpose. A fter extensive laboratory investigations, these pellets were tested in a rotary ...
Research and Development centre for Iron and Steel, Steel Authority of India Limited, established the suitability of cement bonded iron ore pellets as burden material for low and moderate shaft furnaces (Minerals and Metals Review, 1981). The pellets exhibiting crushing strength of around 130–160 kg/pellet were prepared by using around 10% ...
Pellets can be cold bonded using lime, cement, sponge iron powder, and organic materials such as starch and flour. ... 2014, proposed new control technology for air pollution during iron ore ...
The feasibility of producing direct reduced iron from cold-bonded, self-reducing composite pellets, constituted from beneficiated iron ore slime, coke, and different binders (dextrin, bentonite ...
A new cold bonding technology for producing coal bearing composite pellets was developed. Alumina cement was used as binder, which gave high mechanical strength to the pellet even at elevated ...
In this investigation, the fundamental reactions occurring during the heat treatment of cold bonded pellets (CBP) comprised of iron and steelmaking by-products have been studied. Blast furnace (BF) flue dust, which contains fractions of coal and coke particles, has been included in the CBP blend as a source of solid reductant.
This paper describes the efforts taken to further develop BSL's cold binding technology and its application to QIO's high-grade iron ore concentrate to produce a hematite cold bonded …
Cold bonded ore–coal composite pellets developed on a laboratory scale (Part 1 of this two part paper) were tested in a rotary kiln sponge iron plant. This plant had a 12 m length refractory lined rotary kiln of 8 t/day iron ore throughput capacity. Kiln operation was optimised to achieve more than 90% metallisation of sponge iron using ore–coal composite pellets. The …
The preparation process parameters of cold-bonded pellet are optimized. The role mechanism of the binder on cold-bonded aggregates is studied, and a new type of composite binder, bentonite-plant asphalt (B-PA), is invented. The optimal ratio of bentonite to plant asphalt is determined to be 3:1.
Dutta and Ghosh experimented with cold bonded iron ore and non-coking coal/char pellets steam cured at high pressure in an autoclave. The pellets were reduced …
The micro-pellets provide energy to the sinter bed for reduction in coke breeze consumption. 38-48 % reduction in coke breeze has been found when 38 % blast furnace flue dust containing pellets were mixed with iron ore in sintering(12 kg scale).
Cold bonding has significant appeal as a waste management strategy for integrated steel plants and direct reduction plants, and as a partial replacement of indurated …
Pellets can be cold bonded using lime, cement, sponge iron powder, and organic materials such as starch and flour. Cold bonding consumes less energy than heat …
Shaped bodies containing particulate iron materials, such as cast pellets, briquettes and the like, with sufficient strength to withstand temperatures of up to at least 1000° C. can be obtained by using a fully hydrated high-alumina cement as the binder. The strength of the pellets at elevated temperatures can be further enhanced by adding small amounts of bentonite, silica …
Cold bonding consumes less energy than heat induration, and has found favor for bonding self-reducing pellets and for refractory ores that are difficult to heat-treat. Herein, we …
A new cold bonding technology for producing coal bearing composite pellet was developed. Laboratory tests showed that the cold bonded pellet has enhanced mechanical strength, from which good ...
Three types of V-Ti (vanadium-titanium) iron concentrate powder were studied on their features as well as their influences on the properties of cold-bonded iron ore pellets.
The preparation of cold bonded pellets for direct reduction by using a composite binder was discussed. The characterization of funa binder and balling behaviors of funa bearing iron concentrates ...