New method revolutionizes furnace refractory installation
A system has evolved to automate the unpleasant task of refractory relines. Foundries have also realized other production benefits.
Since the dawn of metal, some type of refractory container has been needed to hold the metal long enough to allow it to be melted and transferred to its final destination.
These refectory linings last only for a limited period before they are damaged by melting’s harsh environment, and need to be replaced with fresh refractory. The act or an i pandora charms uk nstance of fleeing so as to evade undesirable consequences.
2. The area where one curved surface merges with another: a snowy runout at the bottom of the ski slope. will occur.
The process of relining coreless induction furnaces, however, has long b pandora charms uk een recognized as an unenviable foundry chore, and one fraught with potential hazards.
Silica, a low cost material, is the refractory of choice for coreless induction furnaces because it withstands repeated cycles of physical shock, temperature differences and chemical attack. The crystalline silica used in refractory products, however, is significantly more toxic than amorphous silica.
Excessive inhalation of crystalline silica can result in silicosis silicosis (s occupational disease of the lungs caused by inhalation of free silica (quartz) dust over a prolonged period of time. , and the substance is also suspected to be a human carcinogen carcinogen: see cancer. carcinogen
Agent that can cause cancer. Exposure to one or more carcinogens, including certain chemicals, radiation, and certain viruses, can initiate cancer under conditions not completely understood. . For these reasons, it is regulated. The primary means to preventing crystalline silica related disease is reducing the amount of silica dust Silica dust
A type of dust from silica (crystalline quartz) which causes breathing problems in workers in the fields of mining, stone cutting, quarrying (especially granite), blasting, road and building construction industries that manufacture abrasives, and inhaled. Local exhaust ventilation and the proper use of National Institute of Occupations Safety Health (NIOSH NIOSH National Institute for Occupational Safety Health, see there
NIOSH Recommendations for Safety Health Standards
Agent NIOSH REL/OSHA PEL Health effects ) approved respirators are the most common control methods.
In addition to the health considerations, the constant lifting, twisting and bending involved in handling refractory bags can result in injury. processes) represent more than 60% of all newly reported occupational illnesses. According to according to1.
2. In keeping with: according to instructions.
3. Department of Labor; it compiles statistics on hours of work, average hourly earnings, employment and unemployment, consumer prices and many other variables. , such injuries cost businesses more than $20 billion per year in direct workers’ compensation workers’ compensation, payment by employers for some part of the cost of injuries, or in some cases of occupational diseases, received by employees in the course of their work. claims. agency established (1970) in the Dept. of Labor (see Labor, United States Department of) to develop and enforce regulations for the safety and health of workers in businesses that are engaged in interstate (OSHA OSHAOccupational Safety and Health Administration, a branch of the US Department of Labor responsible for establishing and enforcing safety and health standards in the workplace. ) drafted an ergonomic standard that failed last year] are forcing foundry managers to consider alternative methods to manual relines of coreless induction furnaces. . With each method, workers enter the confined space Confined space is a term from labor safety regulations that refers to an area whose enclosed conditions and limited access make it dangerous. Description
A confined space is any space: 1) that has limited or restricted means of entry or exit; 2) is large enough pandora charms uk for a of the furnace to ram or vibrate the loose silica material until the surface is solidly knitted.
This practice exposes the worker to airborne silica. O pandora charms uk nce the bottom is completed, the steel form is set into place and centered. The form supports the silica until the lining attains enough strength during the sintering sintering, process of forming objects from a metal powder by heating the powder at a temperature below its melting point. In the production of small metal objects it is often not practical to cast them. process to be self supporting. Afterward, the form is melted away and becomes part of the first melt of iron.