2 edition of Effects of preheated blast on fuel consumption in a slag fuming operation found in the catalog.
Effects of preheated blast on fuel consumption in a slag fuming operation
D. R. Blaskett
Preprint of a paper submitted for discussion atthe Ninth Commonwealth Mining and Metallurgical Congress, London, 5 to 24 May, 1969.
|Series||Paper / Commonwealth Mining and Metallurgical Congress. Mineral Processing and Extractive Metallurgy Section (9th : 1969 : London) -- 3|
|Contributions||Commonwealth Mining and Metallurgical Congress, (9th : 1969 : London)|
|The Physical Object|
|Number of Pages||11|
2. Portland Blast Furnace Slag Cement—Its Speci-fications and Effect to Reduce CO 2 Emissions PBFSC is a kind of blended cement. It is a mixture of Portland cement and ground granulated slag obtained during the production of pig iron using a blast furnace. Table 1 shows the JIS specifica-tions of blended cements. Granulated blast furnace slag. • the air blow into the blast furnace is pre-heated to °c in the hot blast stoves. the stoves work in cycles, first the refractory bricks in stove are heated by burners using bf gas. then the cold blast blown in and the heat stored in the bricks is transferred to the gas. the hot blast is delivered to the bf via a hot blast. Air-cooled blast furnace slag (ACBFS) can be used to replace naturally mined aggregates to minimize the environmental and economic costs associated with construction. This paper compares pore solution chemistry of mortars prepared using ACBFS aggregate with pore solution chemistry of control mortars (i.e., mortars containing siliceous sand). Ground Granulated Blast Furnace Slag (GGBS) The importance of Ground Granulated Blast Furnace Slag (GGBS) lies in its greener way to become a substitute in concrete material. GGBS being a waste material, it needs proper method for disposal. So incorporating this waste material in concrete can reduce the depletion of conventional concrete components such as cement, fine .
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Effect of Preheated Top Gas and Air on Blast Furnace Top Gas Combustion Ji-Won MOON,1) Sang-Joon KIM1) The coke consumption in blast furnaces (BF), directly related to the energy consumption and CO blast, however, will be restricted by the cost of injected fuel and high temperature properties of refractories.
The coke consumption in blast furnaces (BF), directly related to the energy consumption and CO 2 emission from BF, is reduced with the increase of hot blast temperature. To establish the flame temperature of more than the blast furnace gas (BFG) adiabatic flame temperature of K by using only BFG without any additional high calorific value gases such as coke oven gas, the effect of Cited by: 5.
It was discovered that increased secondary combustion air temperature affected the characteristics of the operation of the secondary burner and reduced its fuel consumption to a factor of and % at a preheated secondary combustion air temperature of oC and C, respectively.
Results are provided for calculation of the predicted blast furnace operating regime using converter slag in the iron-ore part of the charge without implementing additional measures with the aim of evaluating its effect on process indices.
Introduction into a blast furnace charge of fractionated converter slag may be performed in order to increase slag magnesia content and to use it as a basic Cited by: 1. 1. Introduction. One of the main goals of solid waste management is to maximize its recycling and reusing ability (Hong and Li, ).Blast furnace slag (BFS) is the residue and solid waste from iron–steel metallurgical industry, whose storage not only occupies a large amount of land resources but also causes environmental pollution to the soil, underground water and by: This paper presents the results of an experimental investigation carried out to study the effect of granulated blast furnace slag and two types of superplasticizers on the properties of self-compacting concrete (SCC).
In control SCC, cement was replaced with 10%, 15%, 20%, and 25% of blast furnace slag. Blast furnace slag (BFS) is a non-metallic industrial by-product, which is produced in blast furnaces by the melting of the iron ore, producing molten pig iron . Worldwide, more than million tons of blast furnace slag are produced every year .
The blast furnace slag can be granulated slag (GBFS) or air-cooled blast furnace slag (ACBFS). The slag fluidity in a blast furnace affects softening-melting behaviour in the cohesive zone, permeability in the lower part of a furnace due to liquid hold-up in the dripping zone, liquid flow in the furnace hearth, and the ability of the drainage of the slag through the tap hole.
It also affects its desulphurization ability. blast furnace slag on account of the difficulty experien-ced in handling the fusible charges in kilns. The first slag fuming plant was started in East Helena, Montana, U.S.A.
in At present, several slag fuming plants are in operation all over the world. Developments in the slag fuming process techniques have been reported from Australia. Trade Name: DURA SLAG™ Description: A ground powder made with an appropriate mill from a glassy granular material formed when molten iron blast furnace slag is rapidly chilled as by immersion in water.” “Slag is a nonmetallic byproduct of the production from the production of iron.
The effect of BOF slag addition on coal combustion efficiency measured in the blowpipe model is insignificant, if a fine fraction is used. preheated blast air and O. 2, if it shall be added. The quality of raw materials (iron ore, coal, and coke) has a clear impact on the carbon emissions of the hot metal production in steel making.
So far, very little work has been done to measure and quantify this impact. Yet for benchmarking, technology choice and general carbon optimization are important elements.
The total slag production of a blast furnace gives an accurate and relevant. Pelletized Slag and Granulated Blast Furnace Slag. Air-cooled blast-furnace slag is the material resulting from solidification of molten blast-furnace slag under atmospheric conditions; subsequent cooling may be ac-celerated by application of water to the solidified surface.
Expanded blast-furnace slag is the lightweight, cellular. 1. Gas Utilization 2. Hot Blast Temperature 3. Sinter % 4. Steam Enrichment 5. Heat loss 6. Flux Rate 7. Coke ash. High Alumina Slag and Blast Furnace Operation.
satyendra; ; 4 Comments ; alumina, Basicity, magnesia, slag, Slag basicity, Slag drainage, Slag fluidity, viscosity,; High Alumina Slag and Blast Furnace Operation. Blast furnace (BF) process of ironmaking is a process where liquid iron (hot metal) and liquid slag are produced by the reduction of iron bearing materials (sinter and / or.
Injection into a BF of BOF slag to improve the slag formation and of BF ﬂue dust to improve the recycling of in-plant ﬁnes has previously been tested.
The effects on the PC combustion efﬁciency at different condi-tions, when these materials are co-injected with coal, have so far not been tested. Combustion efﬁciencies at varied.
slag powder and blast furnace slag so the recycling of steel slag can bring enormous benefits and environ-mental benefit to whole society. 6. Ground granulated blast furnace slag is commonly used in combination with Portland cement in concrete for many applications[10,11] 7.
The heat of hydration is dependent on the Portland. SSW-activated slag pastes evolve significantly less heat up to 7 days than a typical room-temperature-cured PC paste but similar when heat is normalized by compressive strength.
Mortars containing 40% slag and 60% SSW reach ∼ 20 MPa after 7 days of curing at °C. explosive energy applied to the surrounding rock. Analysis of the cost of explosives requires that the effects of explosive energy be placed into proper perspective within the entire drilling, blasting, handling and process-ing operation.
This relationship is illustrated in Figure (Figure ) Analysis of efficient blast. drainage of the hot metal and slag and the coke coke and total fuel consumption, as well as blast volume Further study of blast furnace operation wit h the injection of preheated top gas.
Air-cooled Blast Furnace SlagThe simplest treatment of the liquid slag is to lead it into a slag pit where layers build up until the pit is full. When it has fully solidified and then cooled somewhat, the slag (commonly known as air-cooled blast furnace slag or ACBFS) is excavated and transported away for further treatment (such as magnetic.
Supplementary cementitious materials such as blast-furnace slag (BFS) and pulverised-fuel ash have been used as a partial replacement for Portland cement (PC) in UK and international nuclear waste encapsulation for many years (Angus et al., ; Sharp et al., ).Encapsulation in a cementitious wasteform is the current preferred method of disposal of intermediate level waste in the UK.
In this work, the blast charge weights and the standoff distances to impose a desired displacement ductility level were estimated based on the modified DBD method to account for blast effects. The results of field test for the control slab showed that the achieved displacement ductility levels matched closely with the predicted values.
The blast-furnace slag is the by-product of the ironmaking process. It has produced in the blast-furnace in the During operation molten slag is thrown from the lip of the cup in the form of droplets and slag allow to the ecological improvement of the industry region and to the economy of the expensive kinds of fuel.
effects on engine specifications and operating conditions as well. Brake thermal efficiency, exhaust gas temperature, Brake specific fuel consumption and preheat conditions for diesel oil.
Overall, effects by preheated fuel on engine performance were discussed. LITERATURE REVIEW. Fuels & fueling methods used in the blast furnace 1.
EXTRACTIVE METALLURGY PROJECT SUBMITTED BY: ABHIJEET SINGH 5 TH SEMESTER METALLURGY. A study of the flow characteristics of blast furnace slag is important to record the softening and melting phenomena in blast furnace which greatly influence the extent and location of the cohesive zone having a direct say on the blast furnace operation, quality of hot metal and the coke consumption.
Keywords: Pyrometallurgy, blast furnace, slag viscosity, slag liquidus temperature, phase equilibria Abstract – The viscosity of molten slag in blast furnace operations is an important process variable, influencing the rate and location of reactions inside the furnace, as well as the ease with which the final slag could be removed from the.
content on viscosity of the slag 22 Effect of slag basicity on the liquidus temperature of the slag 23 Cohesive zone model of blast furnace 23 Effect of silicon and its oxides on properties of slag and metal 24 Chapter-3 Experimental Details: Theory and Procedure 25 - 51 Flow Characteristics of Blast Furnace Slag 25 The most common process for granulating blast furnace slag involves the use of high water volume, high pressure water jets in direct contact with the molten blast furnace slag at a ratio of approximately 10 to 1 by mass.
The molten blast furnace slag is quenched almost immediately to form a material generally smaller than a #4 sieve. 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. Blaskett has written: 'Effects of preheated blast on fuel consumption in a slag fuming operation' What does purpose mean in a sience fair project. the purpose is.
Unlike the Canadian operation, in which slag is transported to the pelletizer, the Alan Wood machine receives slag directly from the blast furnace. To ac-comodate the periodic high volume of molten slag, the rotor is three feet in di-ameter and 12 feet long. Water distributes outward through holes drilled in.
This study is a part of an on-going research studying the effect of blast furnace slag as a binder and filler replacement on the properties of fresh and hardened foam concrete.
A mix having the density of kg/m3 with a proportion of (1 cement:2 sand), W/C ratio ofa commercially available additive (SP-1), class F fly ash and a unprocessed blast furnace slag was used. Copper slag, garnet and hematite were shown to have the lowest emission factors.
The study, while providing a significant amount of new information regarding particulate matter generation from dry abrasive blasting operations, illustrated the fact that there remains a. If there is an excess of fuel, detonation of the explosive or blasting agent will generate increased quantities of CO.
If there is not enough fuel, detonation of the explosive or blasting agent will generate increased quantities of NO x. Figures 1 and 2 illustrate the effect of ANFO fuel. Gas flow in the blast furnace is one of the most important factors in controlling a furnace. It not only determines the production but also the fuel consumption and the campaign life.
At Nos. 4 and 5 blast furnaces of ROGESA, probes are installed for detection of the burden profiles and of. Boiler Slag—It’s a Blast to Deal With Slag removal can be a constant battle at many solid fuel-fired power plants.
Conventional weapons include picks, jackhammers, shotguns fired through. Results showed that there is signiﬁcant effect of blast pressure, feed rate, and surface contamination on TPM equations for coal slag based on blast pressure and abra-sive feed rate.
This paper presents the experimental meth- and increasing consumption,32–34 Blast pressure determines the velocity of. Wall Slag Wall slag is the molten slag that builds up on the furnace walls.
Wall slag is shed naturally as boilers cycle through their load range. It is usually controlled by soot blowers using air, steam and in some cases water as a removal medium. Most boilers have some degree of wall slag and it does not necessarily cause problems. acting nuclei, whereas the rapid oxidation of fuel elements (carbon and hydrogen atoms) is the main source of energy in the case of chemical explosions.
Explosive materials can be classified according to their physical state as solids, liquids or gases. Solid explosives are mainly high explosives for which blast effects are best known.Effects of blast-furnace slag on basic engineering properties of the mixes were studied.
Different engineering properties of the mixes such as setting times and day compressive strength were studied at different amounts of blast-furnace slag, sodium oxide content, and water-to-cement ratio."A PRELIMINARY SURVEY of BLAST FURNACE SLAGS USED ADJACENT to and WITHIN NATURAL WATERWAYS" The Standard Slag Company - Materials Control and Research Department: April "EFFECTS of SLAG on AQUATIC LIFE" LaMer Time II, No.
4, pp. November "THE LEACHING of SOME ELEMENTS of ENVIRONMENTAL IMPORTANCE in BLAST FURNACE and.