Npdf on recycling of waste plastics in blast furnaces

Injection of coal and waste plastics in blast furnaces, ccc. Waste plastics used in the blast furnace are coarse particles, because of the difficulty to crushed into fine particles. Neste and ravago start collaboration to enable chemical recycling of over 200,000 tons of plastic waste annually. The msw recycling rate has significantly increased over the past 20 years, with the average nationwide recycling level reaching 34 percent in 2010. Successful recycling of waste plastics is critical to save natural resources and reduce co2 emissions. In fact, almost 52 per cent of all plastics is used in packaging chintan, 2010. Waste packages, as well as building and automotive wastes are the main sources of plastics wastes fig. This can be achieved by improving the life of refractory materials and also by applying different refractories in the different zones of the furnace to increase effective refractory utilization. Several binders, both organic and inorganic, had been assessed, however, only the solid. For each recycling scenario the boundaries of the lca study range from the point at which this mixed plastic waste leaves the mrf through to the production of granulate material ready to be made into new products. The amount of processing of waste plastics which corresponds to this amount of energy conversion is about 1 million. Recovery of materials from recycling of spent furnace linings. Dri from recycled iron bearing wastes for lower carbon in the.

Waste plastics injection system for blast furnace climate. Visit the american plastics council site to learn about the history of plastics and the chemistry of the polymers that make up plastics. Failing to collect plastic waste leads to a loss of valuable resources and at the same time poses a risk to the natural environment. Recycling technology converts plastic waste to energy. Hydrogen from waste plastics by way of pyrolysisgasification chunfei wu and paul t.

Consult the following web sites to find information that will enable you to complete the recycling plastics table and answer the questions. The majority of waste plastics that are injected originate from packaging and container wastes. It discusses the features of this technology, the basic concept and the effects of the technology and provides a list of where it is used in practice. Development of waste plastics injection process in blast. However, distribution patterns for the observed heavy metals were identifiable. Jun 14, 2016 waste toenergy wte trash incineration, which burns waste to generate electricity, is a promising option. Briquetting is one of the possible ways of recycling of this waste while the formed briquettes serve as a feed material to the blast furnace. Most of these materials are accumulated in the open air, waiting for final disposal. Conversion of injected waste plastics in blast furnace. First, plastics are collected and sorted for recycling as recycling plastics is widely preferred over energy recoverythen nonrecycled plastics are shipped to a plasticstofuel facility. Waste plastics injection in a blast furnace the recycling of waste plastics wp by injecting them in a blast furnace bf is being practiced in few bfs especially in japan and europe.

Pigiron smelting is presently being impacted by a serious shortage of coking coals. Recycling of blast furnace sludge by briquetting with. Wastetoenergy wte trash incineration, which burns waste to generate electricity, is a promising option. Plastics waste used plastics are valuable raw materials and should be recovered where ecologically and economically sensible divert from landfill increase of recycling process efficiencies promotion of products made from used plastics. Effect of waste and alternative fuels on blastfurnace. Since 1996, waste plastics have been utilized in jfe steel for reducing agent of iron ore by injection into blast furnace. Ad rem and hamos jointly have developed a processing line that handles the complete plastic recycling chain from waste to resource.

Arlington, va april 28, 2010 a new study confirms that recycling plastics, specifically pet and hdpe, results in significant savings in energy and greenhouse gas emissions. Through the final scaleup, voestalpine will be able to substitute 150. Dri from recycled iron bearing wastes for lower carbon in. Waste plastics injection in a blast furnace ispatguru. A large amount of plastics that we use are becoming waste in no time. Blast furnace slag material description origin in the production of iron, iron ore, iron scrap, and fluxes limestone andor dolomite are charged into a blast furnace along with coke for fuel. The remainder of the initial section will provide the motivation for this project. In addition to ever stricter legal recovery targets for plasticcontaining goods such as weee waste electrical and electronic equipment or eol end of life vehicles lazarevic et al. The most effective method of waste minimization is to generate less waste 2. It is the most basic of all furnaces and production systems.

Now, keith freegard, of ukbased plastics recycler axion polymers is calling for a rethink on the merits of the numerous energy from waste plants operating across europe and in the uk. Feedstock recycling the use of plastic waste as a reducing agent for the. The coke is combusted to produce carbon monoxide, which reduces the iron ore to a molten iron product. In addition to disposing of garbage and reducing landfill space, wte generates 500kwh of. In the blast furnaces, finely pulverized dechlorinated waste plastics and pulverized coal are injected into the blast furnace through tuyeres as a substitute for coke to produce pig iron 33, 57. Gasification of nonrecycled plastics from municipal solid.

For an integrated steel plant producing 20 million tons per year, approximately 2 million tons of process wastes can be formed. Apr 24, 2012 a few startups believe the answer to both the worlds waste issues and oil concerns can be solved with plastic. Before the installation of that system, the behavior of waste plastics injected into the blast furnace. Sep 03, 2014 first, plastics are collected and sorted for recycling as recycling plastics is widely preferred over energy recoverythen nonrecycled plastics are shipped to a plasticstofuel facility. When analyzing the materials it was determined that the mud from the converter could be incorporated again to the steel production process due to its high iron content. Before the installation of that system, the behavior of waste plastics injected into the blast furnace has been studied with the raceway hot model and the commercial blast furnace so as to investigate the possibility of effective waste plastics utilization in the blast furnace. Its chemical composition during the smelting of cast iron on coal coke is 1220 percent carbon dioxide, 2030 percent carbon monoxide, up to 0. Development of waste plastics pulverization for blast. One method of partially replacing coke in the smelting operation is to inject hydrocarbons into the blast furnace. Finalists announced for plastics recycling awards europe 2020. Ninetyeight percent of the pig iron produced in the world is made in blast furnaces. It discusses the features of this technology, the basic concept and the effects of the technology and provides a list of where it.

Blastfurnace gas article about blastfurnace gas by the. Waste plastic recycling is an option to separate the waste plastics from other waste as it has a value as a material. The distribution of the heavy metals in the process outputs is partly varying considerably for the different years. According to the environmental protection agency, only 9 percent of plastic waste generated in 2012 was recovered for recycling. Structure of waste plastics sources in the european union in 2011 1 waste plastics at first should be recycled by mechanical or chemical recycling and when it is not costeffective utilized for. Mar 22, 20 ninetyeight percent of the pig iron produced in the world is made in blast furnaces. There are many different types of plastics, and each type requires different handling in the recycling process. Energy recovery from waste plastics science technique. Via long pipe systems plastics are injected with compressed air into the blast furnace. Waste plastics injection wpi is less injection of coal and waste plastics in blast furnaces 5 commonly carried out, with only a few ironmaking plants in japan and europe currently injecting plastics.

Mechanical waste plastic recycling practical answers. Plastics convert iron ore to steel feedstock recycling in. New study confirms recycling plastics significantly. A factor restricting the utilisation of waste plastics is the cost of their collection and treatment. A few startups believe the answer to both the worlds waste issues and oil concerns can be solved with plastic. Today far too much plastic waste still escapes the european collection systems. According to science for environmental policies,european commission, 2011 municipal waste collection and separation is a vital part in all waste management methods. One way of achieving this is by injecting them with coal into blast furnaces bfs. Injection of coal and waste plastics in blast furnaces.

Final report lca of management options for mixed waste plastics. Swedish scientists studied the co 2 produced when unrecyclable plastics are incinerated and the energy given off is recovered, compared with putting them. These nonrecycled plastics are heated in an oxygenfree environment, where they melt into a liquid and then vaporize into gases. The japan iron and steel federation jisf, as its voluntary energysaving action plan, proposed a 10% energy reduction by 2010 with 1990 as the basis. Injection of coal and waste plastics in blast furnaces 5 commonly carried out, with only a few ironmaking plants in japan and europe currently injecting plastics. Out of the different recycling technologies, recovery of fuel and energy from plastics waste is a very important and effective option. For the purpose of utilization of waste plastics, waste plastics recycling system was installed in nkk keihin no. Effect of waste and alternative fuels on blastfurnace operation. A screw kiln continuous reaction system was used to investigate the production of hydrogen from a representative waste plastic polypropylene. From the results of these experiments, it was found that the. Introduction during the production of iron about 2 tons of waste are generated per ton. The recycling of waste plastics in the blast furnace has been investigated with the test furnace and the commercial blast furnace. On the basis of above results, the waste plastics recycling system was designed.

Request pdf conversion of injected waste plastics in blast furnace operation of several blast furnaces proved that waste plastic wp injection makes recycling of industrial and municipal. Feb 01, 2011 the waste gas has a btu value of around 100 per scfm. Purpose of this section is to provide an overview of measures taken by government agencies and environmental protection bodies to reduce the environmental impacts of plastic waste. More specifically, this report investigates microwave pyrolysis mwp as an alternate tertiary recycling process for waste plastics. Plastics are used in a wide range of applications and some plastic items, such as food packaging, become waste only a short time after purchase.

A high percentage of the plastics being produced ends up in litter streams rather quickly and does not serve longterm needs. The best disposal route for waste plastics has long been a subject of intense debate. This nkks recycling technology, in which waste plastics are used as a substitute for coke, a reducing agent of iron ore, has been officially authorized as a recycling method under the pwrl packaging waste recycling. Waste plastics archives page 14 of 33 recycling magazine. Environment, waste, recycling, sand concrete, plastic. Final report lca of management options for mixed waste. To investigate the optimum particle size of plastics injected into a blast furnace, the combustion and gasification behavior of waste plastics has been studied with the drop tube furnace, raceway hot model and the commercial blast furnace. The first attempts at wpi were made at the bremen steel works in 1994, with commercial injection starting a year later. Moreover, the production of coke used in the smelting operation has an adverse effect on the environment.

The packaging waste recycling law was fully implemented in april 2000 within this context. Introduction in algeria, as in many countries of the world, the amount of plastic waste is increasing and occupies a large part of solid waste. Recycling of plastics impee impr o vin g en gineerin g educ a tion project the 1 notes this resource was developed by dr. Waste plastics archives page 3 of 33 recycling magazine. Is complete recycling of blast furnace sludge within the. Business models for conversion of waste plastic to fuel. Since october 1996, nkk has been operating a recycling system of industrial waste plastics as raw material for blast furnace. Influence of waste plastic utilisation in blast furnace on. Usage of waste plastics in blast furnace sintering machine molten iron slag coking coal iron ore pig iron making process steel making process converter continuous caster rolling process steel products slabsbillet converter gas blast furnace gas tar coke oven gas coke oven coke coal sintered ore c1200 c blast furnace2000 c1500 c.

Marine litter in the sea and the ocean, plastics disintegrate into tiny pieces, which are. In blast furnace, waste plastics can be used with high efficiency due to. Recycling of blast furnace sludge by briquetting with starch. Theres no lack of plastic waste, john bordynuik, ceo and president of jbi inc. Using plastics in products and packaging, and retrieving their energy benefits helps reduce energy requirements and limit greenhouse gas emissions to slow climate change. Can incineration and landfills save us from the recycling. Marine litter in the sea and the ocean, plastics disintegrate into. Hydrogen from waste plastics by way of pyrolysisgasification. The plastic waste and management methods environmental. A study on the plastic waste and environmental degradation. The use of all plastic packaging other than pet bottles as reducing agents for blast furnace is approved under the provisions of this law.

The use of plastics in the bf also recovers energy from the wp and so it is sometimes considered as energy recovery. A mini blast furnace for lead recycling commonly known as mandir bhatti or shahi bhatti is a simple to produce and low capacity of secondary lead production in india and many other countries. The following paper discusses the conversion of waste plastics into useful materials via microwave radiation. The amount of processing of waste plastics which corresponds to this amount of energy conversion is about 1 million t scale. The study used life cycle inventory lci methodology to quantify the energy requirements, solid wastes, and atmospheric and waterborne emissions for the processes required to collect postconsumer pet and hdpe packaging. Recycling plastics is helpful, yet a bit more complicated than recycling glass, paper, or aluminum. Recycling and the utilisation of waste plastics have received increasing interest in recent decades. Waste plastics recycling process using coke ovens springerlink. Raising recycling rates and stopping plastic packaging from becoming litter arent easy, but they must be done. They consist of the waste mud coming from the blast furnace and from the converter. Williams energy research institute university of leeds, leeds ls2 9jt, uk abstract. Recycling of waste plastic packaging in a blast furnace system. The first plant of its kind is now running at full capacity at the ao recycling facility in telford.

Steel plants generate significant amounts of wastes such as sludge, slag, and dust. According to jim garrett, president of vadxx energy llc, a major reason for the low number is that many plastics either contain additives and fillers that make them incompatible with current recycling technologies or. Use of plastics waste in blast furnaces as an alternative raw material for generating energy has been devel. The first integrated system for injecting plastic wastes was at. The oil refiner has set a target to process annually more than one million tons of plastic waste from 2030 onwards. Development of waste plastics injection process in blast furnace. Most plastics used in india are in the packaging sector. Blastfurnace gas top gas, the waste gas from blast furnaces.