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There are significant amounts of by-products in the steel production. The fraction of heavy metals containing dusts is only partially recyclable internally in terms of process technology. One of these by-products, with zinc contents of up to 20%, are converter dusts. A new process for the treatment of zinc rich dusts is the pyrometallurgical RecoDust process presented here. In this process, the steel mill dust is melted with a natural gas-oxygen burner in the so-called Flash Reactor. An air ratio below one creates a reducing atmosphere, in which the zinc is reduced and volatilised. The two resulting products are the iron-rich RecoDust slag and a zinc oxide rich filter dust. The process was realized in the technical centre of the Chair of Thermal Processing Technology at the Montanuniversität Leoben and was successfully carried out in eleven smelting campaigns. Due to the positive test results, research is currently focused on the Up-Scaling of the process from currently 250 to 1 000 kg/h throughput. The core topic of the Up-Scaling is a new dust input system, in which the steel mill dust is pneumatically conveyed into the reactor with the fuel gas. Due to the selective process control, the RecoDust pilot plant is also suitable for other applications, such as a special melting unit or for calcinations. (Authors.), There are significant amounts of by-products in the steel production. The fraction of heavy metals containing dusts is only partially recyclable internally in terms of process technology. One of these by-products, with zinc contents of up to 20%, are converter dusts. A new process for the treatment of zinc rich dusts is the pyrometallurgical RecoDust process presented here. In this process, the steel mill dust is melted with a natural gas-oxygen burner in the so-called Flash Reactor. An air ratio below one creates a reducing atmosphere, in which the zinc is reduced and volatilised. The two resulting products are the iron-rich RecoDust slag and a zinc oxide rich filter dust. The process was realized in the technical centre of the Chair of Thermal Processing Technology at the Montanuniversität Leoben and was successfully carried out in eleven smelting campaigns. Due to the positive test results, research is currently focused on the Up-Scaling of the process from currently 250 to 1 000 kg/h throughput. The core topic of the Up-Scaling is a new dust input system, in which the steel mill dust is pneumatically conveyed into the reactor with the fuel gas. Due to the selective process control, the RecoDust pilot plant is also suitable for other applications, such as a special melting unit or for calcinations. (Authors.)

Phase I of this SBIR program sought to demonstrate the applicability of the Imperium ultrasound camera to the inspection of solid rocket motors (SRMs). Phase II of the program aimed at developing a prototype camera that could be used in either handheld or production settings. The prototype camera was tested to determine its level of performance, ability to detect typical flaws, and the potential time savings with its use. Results show that the camera was capable of seeing flaws in representative composite parts of the motor. Limited testing with a portable system has detected similar flaws. It is expected that the production system will demonstrate a significant reduction in test time over present systems. The developers conclude that this concept is transferable to areas other than the nondestructive evaluation of solid rocket motors., The original document contains color images. Produced in collaboration with Alliant Techsystems, Inc., Magna, Utah. Briefing charts only.

Ultrasound is arguably the most effective nondestructive testing method for the inspection of subsurface faults. However, hand scanning of parts is subject to inspector error and fatigue, and automated point-by-point is extremely time consuming. We are reporting on the results of the use of a novel ultrasound camera for the rapid inspection of composite rocket motor cases in both production and in-service settings. This camera technology can be used for a variety of materials of different sizes and geometries. Using this system, subsurface delaminations, voids, cracks and other faults can be seen with high resolution and quantified immediately. This technique results in scans that can be done several times faster than conventional point-by-point or hand scanning.

Copyright and permission to reprint held by: American Institute of Certified Public Accountants, https://egrove.olemiss.edu/aicpa_assoc/2442/thumbnail.jpg

Copyright and permission to reprint held by: American Institute of Certified Public Accountants, https://egrove.olemiss.edu/aicpa_assoc/2442/thumbnail.jpg

Copyright and permission to reprint held by: American Institute of Certified Public Accountants, https://egrove.olemiss.edu/aicpa_assoc/2442/thumbnail.jpg

Copyright and permission to reprint held by: American Institute of Certified Public Accountants, https://egrove.olemiss.edu/aicpa_assoc/2442/thumbnail.jpg