1. The copyright to this material belongs to the Korea Occupational Safety and Health Agency. Unauthorized use and distribution are prohibited. If an individual uses this for non-commercial purposes, the Korea Occupational Safety and Health Agency must be cited as the source. A corporation using this material must obtain permission from the Korea Occupational Safety and Health Agency first. Using this material without prior permission will be considered copyright infringement, and legal action may be taken. Manufacture Burn by splashing molten metal while charging scrap iron into electric melting furnace ( Burn ) 2009.05 -Serious Accidents in Manufacturing - 안전분야 - 교육자료 미디어개발 2009-97-476

2. Table of Contents I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions

3. Think it over! Find out the Hazard Points in the figure below.

4. I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions I.Fatality Overview Date & Time: 01:00, April O, OOOO Place: metal products manufacturing workplace in Busan Victim: a production worker While the victim inputting charging scrap iron into an electric melting furnace He was burned to whole body including thigh, abdomen, and arm by splashing molten metal to death.

5. II.Process Overview Process Overview (melting process ) Melting process –Materials used for melting processes are pig iron, scrap iron, and return cast iron. Once melting was started after starting of electric furnace, they did charging and inputting of recarburizer manually. 5 ~ 7 times of discharge was conducted a day. - Pig iron: pig iron is steelmaking and casting material. They produced by restoring iron component from iron ore in a shaft furnace (melting furnace). the content of carbon material is iron of 1.7 ~ 9.7%. - Return cast iron: reused iron from parts used for inlet hole for molten metal during casting. –Return cast iron processing was done at factory entrance. Return cast was temporarily stored at factory gateway and moved to near the melting furnace. Therefore, there was big possibility of influx of moisture such as rainwater. Molten Metal carriage Mold Inputting Congregation Cooling Mold Dismantlement Material Receipt Melting I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions Fatality Process

6. III. Fatality Object Fatality Object: electric melting furnace –Capacity: 300 ㎾ –Dimensions: 410 (mm)× 900 (mm) –Weight: 500 ㎏ I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions Electric melting furnace of same type

7. IV. Fatality Process At about 07:00, April O, OOOO the victim went to the office and guided to a co-worker who was doing melting work by factory superintendent at about 08:00. he was ordered to support the melting work. At about 08:40, the melting was completed for the first discharge and started the second charging. At about 10:20, the co-worker who was additionally charging pig iron into melting furnace moved to the storage place to transport pig iron and scrap iron. While the victim was inputting return cast iron into the melting furnace, molten metal splashed over the victim. I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions

8. IV. Fatality Process The victim ran down to forming workplace and fell down on the ground, Co-workers called 119 to take him to the hospital, The victim was suffering from 3-degree burn (80%) on the thigh, abdomen, and arm and died from burn complication. I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions

9. IV. Fatality Process (Pictures) I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions Scrap iron stored outside of workplaceScrap iron charging reconstruction

10. V. Fatality Cause Improper storage of raw materials –Since the raw materials such as scrap iron and return cast iron were stored outside of the workplace, there was vapor explosion hazard during melting owing to influx of moisture such as rainwater. Wrong inputting method of raw material –There was vapor explosion hazard during charging because he directly charge raw material with remaining moisture such as rainwater into melting furnace without drying. I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions

11. V. Fatality Cause No personal safety equipment such as heatproof clothes - In a place in where high heat objects are handled, you must wear heatproof clothes to prevent burn or other hazard. However, he was not wearing heatproof clothes. I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions

12. Improving storage method of raw materials –To prevent processing water or rainwater from leaking into the site, you must install partition walls or move the storage place for raw material (scrap iron, etc) to dry place. Improving inputting method of raw materials - Improving inputting method of raw material (refer to preheating system.). Before inputting raw material (scrap iron, etc) into a furnace, you must check for foreign materials such as moisture and charge raw materials after drying using preheating furnace before charging it into melting furnace. I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions

13. VI. Precautions (preheating system) I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions Preheating method in a container before raw material charging Preheating furnace with combustion chamber in the lower part material inlet burner bascket conveyor burner

14. VI. Precautions Personal safety equipment such as heatproof clothes - To handle high heat objects, you must ensure that you wear personal safety equipment such as heatproof clothes and heatproof gloves. In addition, there must be thorough safety equipment supply, management and supervision. I. Fatality Overview II. Process Overview III. Fatality Object IV. Fatality Process V. Fatality Cause VI. Precautions

15. Thank You.