tantalum dust deflagration in a bag filter dust

tantalum dust deflagration in a bag filter dust

tantalum dust deflagration in a bag filter dust

The dust deflagration index, or the K value, is known to be in the highest category for these metals. Metal dusts that are produced in a grinding and finishing operations tend to vary widely in particle size and in chemistry (the alloy and degree of oxidation) that affect volatility.

Combustible Dust Explosions and Fires-ATEX: Vacuum ...

May 05, 2013· General dust collectors employ filter "bag-house" configurations with high pressure air jets to back flush the filters on occasion to maintain collection capabilities as the finer materials in these type systems have a tendency to migrate into the filter media.

NFPA 654 - New Requirements for Explosion Protection and ...

Jul 31, 2013· These units are used to remove dust from the transport air and blow it into large filter socks that are not enclosed. They are permitted to be located inside the plant without explosion protection if the following conditions are met: 1. The filter medium is not shaken or pressure-pulsed to dislodge dust during operation. 2.

Some aspects in testing and assessment of metal dust ...

The demand for tantalum has rapidly increased in recent years, with remarkable progress in the miniaturization of electronic devices, as in the case of cellular phones. A manufacturer of tantalum powder experienced a tantalum dust deflagration in its filter dust collecting device, which resulted in a fatal accident. (Matsuda & Yamaguma, 2000)

KST, PMAX, MIE… What Does It All Mean for Your Combustible ...

Aug 22, 2018· – The size of the dust is important in determining whether it is combustible. – The MIE tells you how much or how little energy it will take to ignite your dust – The MEC tells you how much dust in the air will risk an explosion . A dust with a low K ST (sugar, as an example, but also many metals) has a low but not zero K ST. It is not ...

NFPA 652 Combustible Dust Hazard Risk and Requirements For ...

The sketch depicts a multiple filter EDC. Deflagration Risks Associated with Enclosureless Dust Collectors. Some risks from traditional explosions are reduced with compliant EDCs since creation of projectiles would be limited given the fabric filter bags used in construction. Yet, deflagration and flash fires risks remain as discussed below.

Dust Explosion Scenarios and Case Histories in the CCPS ...

Dust Explosion Scenarios and Case Histories in the CCPS Guidelines for Safe Handling of Powders and Bulk Solids. ... Tantalum dust deflagration in a bag filter dust-collecting device. Article. Nov ...

Baghouses – Aircon Corporation-Designers, Manufacturers ...

A baghouse is a dust collection devices that filter air by passing it through a cloth or synthetic fiber media (or bag). A bag is a long cylinder-shaped envelope that collects dust on its exposed surface.

Dust Explosion a Past Accident Analysis - ResearchGate

A tantalum dust deflagration occurred in a bag filter dust collecting devices in April 1997, which resulted in a fatal accident .One worker, was killed, & another was seriously wounded.

Dust Testing | OEM Fans and Air Filtration | Glacier ...

Any combustible dust with a Kst value greater than zero can be subject to dust deflagration Used to determine appropriate dust collector and explosion isolation equipment selections Pmax is the maximum explosion overpressure generated in the test chamber.

What You Need to Know about Dust Explosions and Your ...

However, the filter bags next to the vent must be removed, shortened or restrained so that the filters will not obstruct the vent opening at all in the event of a deflagration. The final case is where at least some portion of the vent(s) is located below the bottom of the filter bags but bags …

Five Musts for Dusts: Dust Collection System Design Tips

Dec 23, 2013· In a typical test, the surrogate dust is fed to the collection system on a pre-determined schedule. Operators equipped with air sampling devices perform bag-in/bag-out filter change-outs and contained discharge system clean-outs under conditions that simulate shift-equivalent operations.

Introduction to Combustible Dust Explosions Common to ...

Oct 15, 2013· Secondary dust explosions can form a chain reaction that can run through a facility as long as fuel is present, leading to widespread devastation. Conditions for Dust Explosion. There are five necessary conditions for a dust explosion or deflagration: 1. Presence of Combustible Dust 2. Dust suspended in the air at a high concentration 3.

Dust Collection Systems | Industrial Equipment Solutions ...

Horizontal filters provide a surface for dust to accumulate, reducing airflow and filter life. Dust pulses more efficiently off a vertical filter. Also, in a horizontal collector, dust that is pulsed off the upper filters will land on the ones below it, while in a vertical collector that dust will drop out.

Combustible Dust | Donaldson Industrial Dust, Fume & Mist

Dust collectors are an integral part of many plants' combustible dust compliance strategies. As such, dust collection companies have had to remain active in supplying dust collectors to support a customer's combustible dust control strategy by interfacing with the customer and its experts on fire and explosion protection equipment and strategies.

TANTALUM (METAL AND OXIDE DUST) | CAMEO Chemicals | NOAA

Tantalum in bulk form (bar, sheet, etc.) is much less reactive than it is in powdered form. TANTALUM OXIDE dust is generally unreactive at room conditions. Insoluble in …

Hydrotron Discussion of NFPA 484 & Wet Dust Collection

The dust deflagration index, or the K value, is known to be in the highest category for these metals. Metal dusts that are produced in a grinding and finishing operations tend to vary widely in particle size and in chemistry (the alloy and degree of oxidation) that affect volatility.

CMAXX Industrial Dust Collector System – Imperial Systems ...

Horizontal filters provide a surface for dust to build up and settle on top of the filter, reducing airflow and filter life. Dust pulses more efficiently off a vertical filter. Also, in a horizontal dust collector system, dust that is pulsed off the upper filters will land on the ones below it, while in a vertical collector that dust …

Dust Explosion Scenarios in the New CCPS Guidelines for ...

devastating dust explosions, which originate in one piece of equipment, propagate to other equipment, and finally emerge from the equipment to produce a massive deflagration in a process building. In many dust explosions the originating event is either a smoldering fire or …

Dry Media Dust Collectors vs. Wet Scrubbers: Two ...

Wet scrubbers and dry media dust collectors are two very different technologies used to capture combustible dusts generated during production processes. These processes include but are not limited ...

Active & passive explosion protection systems for dust ...

Mar 12, 2018· Whether you vent your dust collector outdoors or indoors, proper design is crucial to deflagration protection. Outdoor explosion venting. A passive deflagration protection system reacts to an event, while active systems detect and react prior to or during an event.

Combustible Dust | Air Filtration | Glacier Technology

The CMAXX combined with proprietary IDA (In-Line Deflagration Arrester) DeltaMAXX filters an efficient and proven solution for isolating a deflagration and stopping a flame front. Combining the CMAXX with IDA DeltaMAXX filters eliminates the need for expensive after filters. Four Steps to a Combustible Dust …

How to Make Sure Your Dust Collection System Complies with ...

How to Make Sure Your Dust Collection System . Complies with Combustible Dust Standards. ... Other safety features include a sprinkler system and filters with . ... – Standard on Explosion Protection by Deflagration Venting: This document focuses on explosion venting – i.e., on devices and ...

Combustible Dust Explosions Common to Baghouses

Oct 16, 2013· Secondary dust explosions can form a chain reaction that can run through a facility as long as fuel is present, leading to widespread devastation. Conditions for Dust Explosion There are five necessary conditions for a dust explosion or deflagration: 1. Presence of Combustible Dust 2. Dust suspended in the air at a high concentration 3.

TANTALUM - has anyone machined it?

May 23, 2016· An accidental tantalum powder deflagration with casualties occurred during the operation of a bag filter dust-collecting device. To understand the mechanism of the incident and its material hazards, experiments for determining the combustibility and ignition characteristics of the tantalum powder were performed.

Combustible Dust

MSDSs for the chemicals which could become combustible dust under normal operations are available to employees. Employees are trained on the explosion hazards of combustible dusts. ... deflagration suppression systems. Emergency exit routes are maintained properly. •(800)321-OSHA•TTY(877)889-5627.

DUST EXPLOSION PROPAGATION: MYTHS AND REALITIES

White Paper 3 Van Wingerden et al. [8] carried out a series of tests with maize starch, peat and wheat dusts to study explosion propagation in an integrated system including a 5.8 m3 vented bag filter, connected to a 2 m3 vessel. Experiments with maize starch

Dust Collectors and Combustible Dust Strategies

This Roadmap is a high-level summary of steps for a process owner to consider if combustible dust may be produced or handled in their facility. The process owner's final selection of dust collectors and risk mitigation strategies should be based on the outcome of a Dust H …

HazardCommunicationGuidancefor CombustibleDusts

U.S.DepartmentofLabor OccupationalSafetyandHealthAdministration OSHA3371-08 2009 HazardCommunicationGuidancefor CombustibleDusts Occupational Safety and Health Act of ...

Enclosureless Dust Collectors Risk and Requirements

May 26, 2016· The sketch depicts a multiple filter EDC. Deflagration Risks Associated with Enclosureless Dust Collectors ... Removal of dust from filter bags can create uncontrolled dust clouds; ... Enclosureless Dust Collectors Risk and Requirement... April 1. March 6. February 4. January 6. 2015 36. December 3.