2015-04-28_REVISION - M2002004 - Laserfiche WebLink

Home Browse Search

TECHNICAL REVISION GCC owns and operates the cement manufacturing plant located in Pueblo. The Pueblo Plant also operates an on -site limestone quarry. The limestone quarry operates under the Mining Permit No. M- 2002 -004 issued by DRMS on August 29, 2003 as a Regular 112 construction material mining operations. Limestone is used as a raw material in the clinker manufacturing process in the cement kiln as well as an additive in the finish mill. With this application, GCC is requesting a technical revision to its 112 Permit Application and Reclamation Plan submitted in 2002 for its Red Rock and Limestone Mine (i.e., quarry), in accordance with the Colorado DRMS Mineral Materials Rules and Regulations for the Extraction of Construction Materials.' Specifically, this TR requests DRMS to modify-its reclamation plan and allow GCC to beneficially re -use kiln feed material from the main kiln baghouse in the quarry for reclamation backfill purposes its quarry covered under Mining Permit No. M- 2002 -004. DRMS requires that a TR request be submitted and filed for a change in the permit, which has only a minor effect upon the approved or proposed reclamation plan. The enclosed TR request demonstrates that the characteristics and physical properties of kiln feed from the main kiln baghouse is comparable to that of inert materials currently used and approved for the quarry reclamation purposes. In addition, the use of kiln feed from the main kiln baghouse in reclamation as backfill will have no anticipated impact on the reclamation design proposed in GCC's 2002 permit application. Accordingly, GCC requests that DRMS review the enclosed TR for approval to include kiln feed material in its reclamation plan. The outline of the TR follows Section 3.1.5, Paragraph 9 of Rule 3 (Reclamation Measures - Materials Handling) of the rules. For a comprehensive description of the proposed changes, each section of Paragraph 9 has been provided in the following summary paragraphs. Narrative GCC is proposing to use kiln feed material from the main kiln baghouse as a backfill material for reclamation of its quarry following installation of a proposed baghouse dust shuttling system. The concept of selective dust shuttling the baghouse dust from the kiln system is common in Europe as an identified Best Available Technique (BAT), and has being applied domestically in many Portland Cement plants across the United States in response to the stringent requirements of the Portland Cement Maximum Achievable Control Technology regulations MACT.z A small portion of the kiln feed material from the main kiln baghouse will be removed and will be transported to the quarry area for reclamation backfill purposes. Once transported to the quarry, the kiln feed material will be placed with overburden backfill materials used to bring the quarry to grade for reclamation purposes. The kiln feed material from the main kiln baghouse will be mixed with the overburden materials including shale and limestone crusher fines. As described in Section G of the quarry permit application, the backfill will be covered with topsoil and seeded. As demonstrated by the recent TCLP analysis, which was conducted in accordance with SW -846, the kiln feed material from the main kiln baghouse exhibits characteristics similar to that of raw materials currently mined at the quarry. GCC analyzed two kiln feed material samples from the baghouse representative of two,operating conditions 140 degrees Celsius and. 180 degrees Celsius when a portion of the kiln feed .material will be removed from the baghouse. A copy of the TCLP analysis has been included in Attachment 1 for reference. ' Mineral Materials Rules and Regulations for the Extraction of Construction Materials Promulgated October 1995 2 Hoening, Volker of European Cement Research Academy. "Sources of Mercury, Behavior in Cement Process and Abatement Options." Cement Industry Sector Partnership on Mercury Partnership Launch Meeting, Geneva. June 2013. PowerPoint presentation.