Mineral briquetting machine briquetting press machine. Building a model for the reduction of iron ore and complex process in this process iron ore is reduced to iron in solid phase with coke as the reducing agent. Recycling of steel plant byproducts by cold bonded briquetting. Iron fine powder, iron ore after crushing, grinding, mineral separation and other processing powder is called as iron powder, iron powder is the main raw material for sintering, which iron content will directly affect the finished product sinter quality. The manganese ore processing plant crushing and sampling of manganese rock. Cold iron ore fines briquetting grinding mill china. Optimisation of parameters for briquetting process. Iron ore agglomeration processes and their historical. Briquetting agricultural wastes for fuel is meant to improve the residue value as well as environmental criterion. The production of iron ore fines occurs at the early stages of processes in the integrated steel plant. Iron briquetting increases the value of the loose bits of cast iron, as briquettes create an optimal charge in blast furnaces, where the iron is smelted and returned to useful production. Iron ore fines briquetting machine is also known as dry powder briquetting press machine, which can be used to suppress dry powder material like iron powder, aluminum, iron, tin oxide, carbon. Iron ore is found in nature in the form of rocks, mixed with other elements. Figure 1 displays the effect of the coal particle size.
Studies on the cementbonded briquettes of iron and. Mining industry agglomerated the development of techniques of mining and concentrating taconite led to the introduction of the ironore pellet. Briquetting process emerged as an attractive alternative. When the blast furnace operates on highquality iron orepellets, this additional slag. Effective processing of the iron ores e3s web of conferences. Once the reduction process is completed, the hot iron is transferred to the briquetting machines, where it is compacted. The iron ore is reduced by contact with the reducing gas, and reaches a metallization of 9293% in the final reactor. Jul 17, 2015 iron ore fines briquetting machine is also known as dry powder briquetting press machine, which can be used to suppress dry powder material like iron powder, aluminum, iron, tin oxide, carbon. Process description with corex, all metallurgical work is carried out in two separate process reactors the reduction shaft and the melter gasifier.
Iron ore agglomeration processes and their historical development. Schematic diagram of the extruded briquette preparation process. In the briquetting process, fines are usually bound using water glass with hydrated lime. Metal briquetting process metal briquette machines ruf. Using of briquetting for ores clotting enables the costs cut and brings to a higher level of environmental safety of the process. This causes iron resource loses and also causes higher cost of utilization. In this work, a numerical model of briquetting process has been conducted to analyse the physical and mechanical properties of briquettes so that the optimal conditions of briquetting can be identified. Kurunov if, malysheva ty, bolshakova og 2007 investigation of phase composition of ironore briquettes in order to assess their behavior in blast furnace. At the end of the day, one of the biggest headaches for any shop is the resulting waste from a days work. Coal briquetting process guide you to produce coal briquettes. The briquetting process involves pressing the fines into a block or briquette of suitable size and shape in a briquetting machine, either with or. Pdf development of composite briquettes of iron ore and coal. Firstly, if the coal is burnt directly, it will cause great pollution.
Get a material with the small particle is the first thing we need to ensure in mineral briquette process. Properties of the residue and briquetting process determine briquette qualities combustion, durability, stability, etc. Mineral briquetting machine are all four roller doublepressing machines. Briquetting is a process in which fine particles are pressed together under considerable pressure. The most commonly used crushers and grinding mills in iron ore crushing and grinding process for iron ore mining are jaw crusher, cone crusher, hammer crusher and ball mill, scm supermicro mill, etc. Iron briquettes command a higher price at foundries than loose iron chips, as they yield more metal in the smelting process. Abstractinnovative energy saving technologies have been developed to improve the efficiency of coal usage, especially in ironmaking. Additional hot briquetting plants for already established but also for new direct reduction processes are under construction or in different stages of planning.
One of these technologies is a product known as the carbon composite iron ore hot briquette ccb a selfreducing iron orecarbon composite that uses the thermal plasticity of coking coals as a binder to enhance mechanical strength. Iron ore lump ore, pellets, or a mixture thereof is charged into the reduction shaft, where it is reduced to direct reduced iron dri by the reduction gas in counterflow. The hydrogen is produced by means of natural gas reforming, but hydrogen from sources other than a steam reformer, e. The binders used include lime, various cements, and liquid glass. Coal briquetting process coal industry patents limited. Previous work in csiro has shown that briquetting is a prospective alternative process for agglomerating iron ore fines. High pressure dry powder briquetting press can make briquettes from a wide range of powdery materials, including ore dust, iron ore, and many other mineral powder materials. The flowsheet incorporates a conventional multistage crushing plant with a grizzly or screen ahead of both the primary and secondary crushers.
Figure 3 represents the hot briquetting process for the production of hbi. Briquetting of iron bearing materials a thesis submitted in partial. Although iron ore fines are used for making pellet after beneficiation. Our briquette press does the pressing section twice with high pressure in the briquette production, the briquettes product has high hardness and density, our machine is equipped with 4 rollers.
These fines are difficult to handle and to process in a melting vessel. Iron fine powder, iron ore after crushing, grinding, mineral separation and other processing powder is called as iron powder, iron powder is the main raw material for sintering, which iron content will directly affect the finished product sinter quality iron fine powder according to ore dressing methods can be pide in to. A cold coal briquetting process comprising forming a mix of fine coal with a binder comprising 515% molasses and up to 5% of an inorganic hardening agent for the molasses selected from the group consisting of calcium carbonate, calcium phosphate, iron oxide and aluminium oxide, all percentages being by weight of the mix, and briquetting the mix. Finite element analysis of briquetting of iron ore fines. Us2914394a us648525a us64852557a us2914394a us 2914394 a us2914394 a us 2914394a us 648525 a us648525 a us 648525a us 64852557 a us64852557 a us 64852557a us 2914394 a us2914394 a us 2914394a authority us united states prior art keywords sulphate grams mixture ores starch prior art date 19560405 legal status the legal status is an. Briquetting is the simplest and earliest applied process. It is an agglomeration process which converts iron ore fines into large, hard and porous lumps. Properties of products produced from the agglombriquetting conditions for australian hematitegoethite iron ore fines. A wide range of different materials are pelletized including chemicals, iron ore, animal compound feed, plastics, and more. Pelletization is an agglomeration process of iron ore concentrates with a.
The reducing gas from 1020% co and 8090% h2 is produced from natural gas using midrexs co2 reforming. The paper describes the characteristics of hbi and its current industrial application for. Two times pressure will make briquette in higher density. The new process does not depend on the existing cokemaking or sintering processes, and thus also offers.
The process uses hydrogen from natural gas to reduce iron ore fines, significantly decreasing the costs of the steelmaking process due to the elimination of the agglomeration step. Briquetting is one of the oldest iron ore agglomeration methods, but it has since been replaced by sintering and pelletizing. This iron ore is mixed with water, bentonite or other organic binders less expensive and contaminant 12, and lime and treated. This process, using a hydraulically powered press, compacts the loose iron fragments into dense cylindrical forms, or briquettes. Iron briquetting raise the monetary value of cast iron scrap. The high quality, low cost product can be used as pure scrap substitute in electric arc furnaces as well as for. Composite briquettes or pellets consisting of iron ore, carbon, and a. Pelletizing is the process of compressing or molding a material into the shape of a pellet. The present work describes the possibility of coldbriquetting of fine iron ore to produce dri direct reduced iron in several costeffective ways. Development of composite briquettes of iron ore and coal. Reduction of the iron ore there are two basic met hods for reducing iron ore. Fundamental study on carbon composite iron ore hot briquette.
Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Agglomeration is the size incensement process of the fines ore. Prior art keywords method defined ore briquette flux step prior art date 20010802 legal status the legal status is an assumption and is not a legal conclusion. Directreduced iron one exception is the fluidized bed process. Mineral powder briquetting pressmaking ore dustiron ore. Briquetting, another form of agglomeration, involves heating the ore and pressing it into briquettes while the materials are still hot. Years of experience in mechanical manufacturing, so our briquetting machine have good quality and low price. Pellets are comprised of ore that has been agglomerated into balls. Pdf cold briquetting of iron ore fines for dri production. Briquetting article about briquetting by the free dictionary. There are alternatives of equivalent quality, such as sulfite lye or molasses. The first metallurgical step is to reduce iron ore to metallic iron, a process which is mostly carried out in a blast furnace, using coke as both a fuel and reducing agent. In the briquetting of metal ores, the raw materials used include iron ore fines separate or mixed with a fuel, finely ground and powdered nonferrous ores, charge dust from blast furnaces, and other metallurgical wastes. Our work can be help optimise the briquettes process of iron ore fines.
Us2914394a us648525a us64852557a us2914394a us 2914394 a us2914394 a us 2914394a us 648525 a us648525 a us 648525a us 64852557 a us64852557 a us 64852557a us 2914394 a us2914394 a us 2914394a authority us united states prior art keywords sulphate grams mixture ores starch prior art date 19560405 legal status the legal status is an assumption and is not a legal conclusion. Briquetting conditions for australian hematitegoethite iron ore fines. Mineral briquette plant design with roller briquette press machine. The present work describes the possibility of cold briquetting of fine iron ore to produce dri direct reduced iron in several costeffective ways using certain novel technologies developed. Carbon composite iron ore hot briquette ccb is the product of fine iron ore and fine coal by hot briquetting process, which attracts more and more attention as a new type of ironmaking raw materials aiming to improve the operation efficiency and reduce the. Properties of products produced from the agglom briquetting conditions for australian hematitegoethite iron ore fines. Circored is a two stage fluidized bed process, reducing iron ore fines directly without prior agglomeration, that operates at low reduction temperatures using pure hydrogen as the reducing gas. Use a hydraulic roller briquette press will help to briquette some of the mineral powders with low moisture the advantages. By means of various industrial processes incorporating cuttingedge technology, iron ore is processed and then sold to steel companies.
But during the using process, there will be some big problems. Iron ore, as mined, is a combination of iron with oxygen and various other unwanted substances, generally known as gangue. Sintering is a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slagforming agents and solid fuel coke. Pelletization is an agglomeration process of iron ore concentrates with a granulometry lower than 150 m and low concentration of impurities 10, 11. This pdf file is created by trial version of quick pdf converter suite. Briquetting conditions for australian hematitegoethite iron. Applications relate to improving transportation characteristics of export coals and pretreatment directly prior to coke oven charging operations. Agglomeration of ore into coarse, porous masses achieves this even distribution of fluids by preventing fine particles from get p. The carbon is removed from the alloy going off as carbon monoxide to a level as low as.
Briquetting of iron bearing materials ethesis nit rourkela. Fine grained iron ores are pressed in to pillow shaped briquettes with the addition of some water or some other binder under high mechanical compressive pressure. The creation of a dense mass of dispersed material is a favorite occupation of man, starting from the new stone age the neolithic, from 7000 bc. Forms a solid and homogeneous product briquettes or flakes out of various size fractions and a further crushingsieving step is required to obtain granules of various size ranges. Iron ore fines briquetting machine iron ore fines briquette.
Once the briquettes are c ooled, they are sent directly to the blast furnaces. For the utilization of the variable ore, it is necessary to agglomerate the fines into the required size for charging in the blast furnace. The 70 million net tons of steel recycled in 2000 were used to produce about 112 million net tons of new steel in the united states. Our briquetting process simple steps to create value from your waste. Of coke breeze sintering iron ore process crusher, mining during the iron ore sintering process, iron ore fines pdf.
Coal briquetting process guide you to produce coal briquettes coal briquettes are made of coal powder, which is generally used in our daily life. Carbon iron composite is produced by mixing coal and iron ore pellet feed and densification by hot briquetting, followed by carbonization of the bri quetted. Fines ranging from 6 to 40% arise when iron ore is directly reduced. The strength and density of green and reduced briquettes made. Iron briquetting iron briquette machines ruf briquetting. Briquetting conditions for australian hematitegoethite. Here carbon is formed on the reduced iron ore in the form of iron carbide. Fundamental study on carbon composite iron ore hot. Pavlov av et al 2000 research of briquetting process of the fine chromium ores. The pellet is the major form of introducing iron into the steelmaking blast furnace. Another method of agglomeration is briquetting, which consists of three basic technologies i. State of direct reduction and reduction smelting processes j.
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