Proceedings Of The Marine

FALL 2015

Proceedings magazine is a communication tool for the Coast Guard's Marine Safety & Security Council. Each quarterly magazine focuses on a specific theme of interest to the marine industry.

Issue link:

Contents of this Issue


Page 88 of 94

Fire or Explosion Concerns: While lime can generate heat if exposed to moisture, it is not in itself combustible, and therefore presents a low f re risk. What is the Coast Guard doing about it? The U.S. Coast Guard ensures compliance with the domestic and international regulations applicable to lime bulk transport in U.S. waters. About the author: Mr. Tom Gleave is a chemical engineer in the Hazardous Materials Division at U.S. Coast Guard headquarters. He develops, maintains, and updates domestic and international regulations for solid bulk cargo marine transport. Mr. Gleave earned a B.S. in environmental engineering from Temple University and has more than a decade of experience in envi- ronmental engineering and air quality compliance. He also served four years in the U.S. Navy as an aviation electricians' mate. References: Lewis, Richard J. Sr. "Calcium Oxide." Hawley's Condensed Chemical Dictionary, 14 th Edition. The National Lime Association. NLA, 3 November 2014. Available at www.lime. org/lime_basics/faq.asp. "Lime: Calcium Oxide — CAO." Chemical of the Week., 20 October 2014. Available at CAMEO Chemicals, "Calcium Oxide." NOAA, 13 October 2014. Available at http:// What is it? Unslaked lime is an inorganic white or grayish-white odorless crystalline solid that is soluble in acid and reacts exothermically with water to form calcium hydroxide. Lime has a wide variety of uses and applications that make it quite valuable, including steel manufacturing, environmental protection, construction, mining, and chemical manufacturing. In steel manufacturing, it is used as a f ux to remove impurities such as silica, phosphorus, and sulfur from molten iron. The fastest-growing and second most com- mon use is in environmental protection, where lime is used to remove sulfur oxides and mercury from power plant emissions. It is also used to treat sewage sludge and animal waste from feeding operations and to adjust pH in industrial waste water discharges. Why should I care? Shipping Concerns: When unslaked lime combines with water, it generates a great amount of heat that may ignite nearby combustible materials, so it should be stored away from paint, vessel stores, or other combustible solids/cargoes. Health Concerns: Lime is corrosive to the eyes and mucus membranes. It can also cause serious alkali burns on the skin or inter- nally, if inhaled or swallowed. Understanding Unslaked Lime by Mr. toM glEAvE Chemical Engineer Hazardous Materials Division U.S. Coast Guard 86 Proceedings Fall 2015 Chemical of the Quarter

Articles in this issue

Links on this page

Archives of this issue

view archives of Proceedings Of The Marine - FALL 2015