Cooperative Mining Series; Bulletin -33 Volume 13-16
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ... Chicago, 9ilmington & Vermilion Coal Com-pany, 9outh 9ilmington. Drying properties Good Linear drying shrinkage 4.05% Volume drying shrinkage 11.14% Tempering water 20.30% Oxidation Complete in 1 hour. Maximum safe burning temperature Cone 04 Heat range Very short; begins to bloat above cone 04. When burned at cone 04--Burning shrinkage 8.18% Total shrinkage 12.23% Porosity 0.41% Fracture Vitreous Color Dark cherry red; comparatively free from scum. Possibilities Common and front brick, hollow ware. Precautions Because of short heat range the products out of kiln would vary considerably in color, size, and porosity. Sample 67.--Location in mine, on SE. entry; sample represents roof material up to 6 feet above coal; hard, light-gray roof shale of fine sandy structure, comparatively uniform and free from deleterious matter. Slaking test Very little slaked at end of test. Residues left on screens--10 mesh 93.29% 20 mesh 1.26% 35 mesh 0.87% 65 mesh 0.72% 100 mesh 0.42% 150 mesh 0.26% Passed 150 mesh-. 3.18% Plasticity Fair Molding properties Fair Drying properties Good Linear drying shrinkage 2.76% Volume drying shrinkage 8.78% Tempering water 19.80% Oxidation Completely oxidized when first trial was drawn. Maximum safe burning temperature Cone 01 Heat range Cone 04 to cone 01; bloats above cone 01. When burned at cone 01--Burning shrinkage 9.35% Total shrinkage 12.11% Porosity 5.50% Fracture Dense, stony. Color Dark, cherry red; very slightly scummed. Possibilities Common and front brick. Sample 27.--Location in mine, face SE. entry; sample represents floor clay 4 to 13 inches below coal, the first 4 inches immediately below coal was a carbonaceous clay; hard, blue-gray clay with structure resembling that of fire clay; contains...
- 189 x 246 x 5mm | 172g
- 13 Sep 2013
- United States
- black & white illustrations