Development of the Process of Manufacturing Pig Iron for Cast Iron from Copper Slag

2014 ◽  
Vol 711 ◽  
pp. 218-221
Author(s):  
Jei Pil Wang
Keyword(s):  
Cast Iron ◽  
Electric Furnace ◽  
Copper Slag ◽  
Raw Material ◽  
Copper Matte ◽  
Pig Iron ◽  
Iron Copper

A study on the manufacturing pig iron for cast iron from copper slag has been conducted to recover iron-copper matte to be used as a raw material for foundry industries. The copper slag was reduced by carbothermic reaction at 1300°C for 2 hours using electric furnace. Finally, iron-copper matte was successfully obtained with about 93 wt.% and 5 wt.%, respectively.

scholarly journals «Out-of-furnace cast iron processing» subsystem in the solution of tasks for the choice of rational technology for producing quality metal products under the applicable conditions of raw material and technological.

2019 ◽  
pp. 106-115
Author(s):  
D.N. Togobitskaia ◽  
A.S. Vergun ◽  
L.S. Molchanov ◽  
V.G Kislyakov ◽  
Y.M. Likhachov ◽  
...  
Keyword(s):  
Decision Making ◽  
Cast Iron ◽  
Information Modeling ◽  
Raw Material ◽  
Injection System ◽  
Pig Iron ◽  
Furnace Treatment ◽  
Metal Products ◽  
End To End ◽  
Quality Metal

The creation of end-to-end technology for the production of competitive metal products in modern conditions puts on the agenda the task of choosing the optimal metal production technology scheme. In solving this problem, a significant role belongs to the development of an information-modeling system for analysis and decision making. An important link in end-to-end technology is the after-furnace treatment of cast iron. As the analysis of various technological solutions for pig iron desulfurization has shown, the process developed at the Institute of Ferrous Metallurgy is currently the most economical, rational and preferred. The process is carried out by blowing through the immersed tuyeres of dispersed granular magnesium without additives. A special dosing and injection system is used. The developed process has undergone numerous industrial testing at domestic and foreign factories. To optimize the process of end-to-end technology and its information-mathematical support, modular mathematical models have been developed. An integrated database has been created that summarizes information on the parameters of cast iron desulfurization technology with granular magnesium. The expert system «Out-of-furnace cast iron processing» is described and presented, which allows to obtain high-quality metal products. The adequacy of the developed model for predicting the specific consumption of magnesium in the after-furnace treatment of cast iron was studied. The completed developments created the prerequisites for building the architecture of the Expert Decision Making System. The replenishment of the database with information on current and other technologies for pig iron desulfurization will make it possible to refine the existing and obtain descriptive models for various reagents, which will serve as the basis for the algorithmic support of the analytical unit of the expert system.Key words: desulfurization, hot metal, magnesium, information system, model.

scholarly journals A Study on Reduction of Copper Smelting Slag by Carbon for Recycling into Metal Values and Cement Raw Material

2020 ◽  
Author(s):  
Urtnasan Erdenebold ◽  
Jei-Pil Wang
Keyword(s):  
Blast Furnace ◽  
Iron Oxide ◽  
Blast Furnace Slag ◽  
Copper Slag ◽  
Raw Material ◽  
Copper Smelting ◽  
Pig Iron ◽  
Reduction Smelting ◽  
Smelting Slag ◽  
Furnace Slag

Copper smelting slag is a solution of molten oxides created during the copper smelting and refining process, and about 1.5 million tons of copper slag is generated annually in Korea. Oxides in copper smelting slag include ferrous (FeO), ferric oxide (Fe­2O3), silica (SiO­2 from flux), alumina (AI2O3), calcia (CaO) and magnesia (MgO). Main oxides in copper slag, which iron oxide and silica, exist in the form of fayalite (2FeO·SiO2). Since the copper smelting slag contains high content of iron, and copper and zinc. Common applications of copper smelting slag are the value added products such as abrasive tools, roofing granules, road-base construction, railroad ballast, fine aggregate in concrete, etc., as well as the some studies have attempted to recover metal values from copper slag. This research was intended to recovery Fe-Cu alloy, raw material of zinc and produce reformed slag like a blast furnace slag for blast furnace slag cement from copper slag. As a results, it was confirmed that reduction smelting by carbon at temperatures above 1400°С is possible to recover pig iron containing copper from copper smelting slag, and CaO additives in the reduction smelting assist to reduce iron oxide in the fayalite and change the chemical and mineralogical composition of the slag. Copper oxide in the slag can be easily reduced and dissolved in the molten pig iron, and zinc oxide is also reduced to a volatile zinc, which is removed from the furnace as the fumes, by carbon during reduction process. When CaO addition is above 5wt.%, acid slag has been completely transformed to calcium silicate slag and observed like blast furnace slag.

scholarly journals A Study on Reduction of Copper Smelting Slag by Carbon for Recycling into Metal Values and Cement Raw Material

2020 ◽  
Vol 12 (4) ◽  
pp. 1421
Author(s):  
Jei-Pil Wang ◽  
Urtnasan Erdenebold
Keyword(s):  
Blast Furnace ◽  
Iron Oxide ◽  
Blast Furnace Slag ◽  
Copper Slag ◽  
Raw Material ◽  
Copper Smelting ◽  
Pig Iron ◽  
Reduction Smelting ◽  
Smelting Slag ◽  
Furnace Slag

Copper smelting slag is a solution of molten oxides created during the copper smelting and refining process, and about 1.5 million tons of copper slag are generated annually in Korea. The oxides in copper smelting slag include ferrous (FeO), ferric oxide (Fe2O3), silica (SiO2 from flux), alumina (AI2O3), calcia (CaO) and magnesia (MgO). The main oxides in copper slag, which are iron oxide and silica, exist in the form of fayalite (2FeO·SiO2). Since copper smelting slag contains high content of iron, and copper and zinc, common applications of copper smelting slag can be used in value-added products such as abrasive tools, roofing granules, road-base construction, railroad ballast, fine aggregate in concrete, etc. Some studies have attempted to recover metal values from copper slag. This research was intended to recover ferrous alloy contained Cu, a raw material of zinc, from copper slag, and produce reformed slag such as blast furnace slag for Portland cement. As a result, it was confirmed that with reduction smelting by carbon at temperatures above 1400 °C, it is possible to recover pig iron containing copper from copper smelting slag, and the addition of CaO in reduction smelting helped to reduce iron oxide in the fayalite and change the chemical and mineralogical composition of the slag. The copper oxide in the slag can be easily reduced and dissolved in the molten pig iron, and zinc oxide is also reduced to a volatile zinc, which is removed from the furnace as fumes, by carbon during the reduction process. When CaO addition is above 5%, acid slag is completely transformed into calcium silicate slag and is observed to be like blast furnace slag.

Semisolid Forging of Cast Iron Using Rapid Resistance Heating

2007 ◽  
Vol 561-565 ◽  
pp. 925-928 ◽  
Author(s):  
Seijiro Maki ◽  
Kazuhito Suzuki ◽  
Kenichiro Mori
Keyword(s):  
Cast Iron ◽  
Control Function ◽  
Electric Energy ◽  
Spheroidal Graphite ◽  
Pig Iron ◽  
Resistance Heating ◽  
Cast Irons ◽  
Ac Power ◽  
Spheroidal Graphite Cast Iron ◽  
Graphite Cast Iron

Feasibility of semisolid forging of cast iron using rapid resistance heating was experimentally investigated. Gray pig iron FC250 and spheroidal graphite cast iron FCD600, whose carbon equivalents are both 4.3% in mass, were used for the experiments. Since these cast irons have a narrow semisolid temperature range, an AC power supply with an input electric energy control function was used. In this study, the resistance heating characteristics of the cast irons were firstly examined, and then their semisolid forging experiments were conducted. In the forging experiments, the conditions of the forgings such as microstructures and hardness properties were examined, and the feasibility of the semisolid forging of cast iron using resistance heating was discussed. As a result, it was found that the method presented here is highly feasible.

Specialty of Сarbon-Carbid-Silicic Mixture Using (UKKS) as Substitute of Re-Carburizing Agent and Ferrosilicon for Grey Iron Melting

2019 ◽  
Vol 946 ◽  
pp. 696-701
Author(s):  
Viktor A. Kukartsev ◽  
Vladislav V. Kukartsev ◽  
Vadim S. Tynchenko
Keyword(s):  
Cast Iron ◽  
Essential Element ◽  
Modern Technology ◽  
Cost Comparison ◽  
Pig Iron ◽  
Induction Crucible Furnaces ◽  
The Cost ◽  
Technology Of Production ◽  
Grey Iron ◽  
Industrial Frequency

In the transition to modern high intensive processes of smelting there had been reversed technologies structures to get carbon content in cast iron. A re-carburizing agent, that can be one of the most significant reasons of occurrence of defects of the cast, and deformed metal and decrease of the level of properties have been identified. There was not only made the decarburizing agent of modern technology of production of pig-iron essential element (particularly synthetic), but also resulted in many of variants of its realization from the standpoint of level decarburizing, type, using re-carburizing method of decarburizing technological phase, where enter of carbonaceous materials. Particularly sharply process of execution re-carburizing influences receipt of synthetic pig-iron in induction crucible furnaces of industrial frequency from metal works, which contained 80-90% of steel breakage. Then, it is necessary to raise the content of carbon from 0,3 to 3,0-3,8% (depending on the pig-iron mark). It forces foundry enterprises to approach with big care at a choice of existing materials, which it is possible to use as decarburizing and to verify carefully, which is appearing at the market. In work application there are considered variants of using carbon-carbide-silicon mixture UKKS-31 at melting of grey pig-iron in induction, crucible furnaces, intended for pig-iron melting. The cost comparison is presented between traditional technology and with using mix UKKS-31.

Reduction of Composite Pellet Containing Indonesia Lateritic Iron Ore as Raw Material for Producing TWDI

2013 ◽  
Vol 281 ◽  
pp. 490-495 ◽  
Author(s):  
Adji Kawigraha ◽  
Johny Wahyuadi Soedarsono ◽  
Sri Harjanto ◽  
Pramusanto
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Material ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Composite Pellet ◽  
Furnace Process ◽  
Iron Phase ◽  
Reductive Atmosphere ◽  
Reduced Pellets

Blast furnace process is still an important process for producing pig iron. The process needs high grade iron ore and coke. The two materials can not be found easily. In addition blast furnace process needs cooking and sintering plant that produces polluted gases. Utilization of composite pellet for pig iron production can simplify process. The pellet is made of iron ore and coal. In addition the pellet can be made from other iron source and coal. This paper discusses the evolution of phase during reduction of composite pellet containing lateritic iron ore. Fresh iron ore and coal were ground to 140 mesh separately. They were mixed and pelletized. The quantity of coal added was varied from 0 %, 20 % and 29 % of pellet weight. Pellets were heated with 10 °C/minute to 1100 °C, 1200 °C, 1300 °C and 1350 °C in a tube furnace and temperature was held during 10 minutes. Heated pellets were analyzed with XRD equipment. XRD of reduced pellets showed that iron phase change with coal and temperature. Lack of coal during heating results the re-oxidation of iron phases. This process is due to replacement of reductive atmosphere by oxidative atmosphere.

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