50results about How to "Break the balance" patented technology

The invention relates to a construction technology for allowing a tunnel to pass through a karst cave, and in particular relates to a construction technology for allowing a tunnel to pass through an ultra-large karst cave. The technology at least comprises the following steps of: 1) performing simple bridge treatment on the underground part of the karst cave; 2) performing primary support, namely arranging a support wall at one side of the karst cave; 3) forming parallel guide holes; 4) performing bottom treatment; 5) treating the tunnel hole body at the inlet section of the karst cave; 6) filling C25 early strength sprayed concrete within 1 meter at the top of the support wall, and arranging phi 50 small grouting conduits with the lengths of 3 meters in the concrete, wherein the distance between the small conduits is 1.5 meters; 7) supporting the arch part and the side wall surrounding rock of the karst cave by adopting phi 22 cartridge anchor rods arranged in a plum blossom shape and at a distance of 150cm*150cm, hanging phi6 reinforcing meshes at a distance of 15cm*15cm, and spraying C25 early strength concrete with the thickness of 15 centimeters; 8) treating the accumulation of the karst cave; and 9) monitoring and measuring when the tunnel passes through the ultra-large karst cave. The construction technology for allowing the tunnel to pass through the ultra-large karst cave is simple in process, convenient for construction, low in cost, scientific, effective, energy-saving and environmentally-friendly.

The invention was involved in the method to dissolve sulphating roasting slag of sulfureous gold ore by acid . The steps consist of the following: a) 20%-80% acid, roasting slag and lacquer solvent were added into the reactor and was mixed. The mass percent of acid and roasting slag was 1 to 1-15 and the mass percent of lacquer solvent and roasting slag was 1 to 1-100. b) All the materials were reacted for 1-6h at 60-120deg.C. c) Gold and silver were extracted by traditional method from filter residue. Extracted rate of ferrum in roasting slag was 1 fold more than traditional method under same temperature, time and concentration of acid solution .The method promoted extract of gold in the cyaniding technology and the efficiency was improved by 3%-4%.

A TaWN film used as the barrier material of copper interconnection contains W (13.6-22.7 Wt%), N (9) and Ta (rest). Its advantages are high adhesion and high power to resist against electronic migration.