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    • 6. 发明申请
    • NON-CAKING ROCK DUST FOR USE IN UNDERGROUND COAL MINES
    • 非开采岩屑用于地下煤矿
    • US20150008369A1
    • 2015-01-08
    • US14281610
    • 2014-05-19
    • Imerys Pigments, Inc.
    • David ANSTINEDickey SHURLING, JR.
    • E21F5/12
    • E21F5/12C01F11/185C01P2004/61C01P2004/62C01P2006/12C01P2006/60C09C1/024C09C3/08C09K3/18C09K3/22
    • A heterogeneous composition for use as rock dust is disclosed. The heterogeneous composition includes a fine, wet ground inorganic particulate material treated with at least one fatty acid, a salt thereof, or an ester thereof, and a coarse, untreated, dry ground inorganic particulate material. Also disclosed is a heterogeneous composition including coal dust and mine rock dust including a fine, wet ground inorganic particulate material treated with at least one fatty acid, a salt thereof, or an ester thereof, and a coarse, untreated, dry ground inorganic particulate material. The amount of mine rock dust may be sufficient to render the coal dust explosively inert. The fine, treated, wet ground inorganic particulate material may be calcium carbonate. The coarse, untreated inorganic particulate material may be calcium carbonate. The fatty acid may be stearic acid.
    • 公开了一种用作岩屑的异质组合物。 非均相组合物包括用至少一种脂肪酸,其盐或其酯处理的细的,湿磨的无机颗粒材料,以及粗的,未处理的干燥研磨的无机颗粒材料。 还公开了一种异质组合物,其包括煤粉和矿石粉尘,包括用至少一种脂肪酸,其盐或其酯处理的细的,湿磨的无机颗粒材料,以及粗,未处理的干磨的无机颗粒材料 。 矿山灰尘的数量可能足以使煤尘爆炸成为惰性。 精细处理的湿磨的无机颗粒材料可以是碳酸钙。 粗的未处理的无机颗粒材料可以是碳酸钙。 脂肪酸可以是硬脂酸。
    • 8. 发明申请
    • Method of dusting coal mine surfaces
    • 煤矿表面除尘方法
    • US20030146410A1
    • 2003-08-07
    • US10177475
    • 2002-06-21
    • Frank T. GayDontave D. CowsetteJeffrey T. ChampaBradley S. Hulvey
    • C09K003/22
    • A62D1/0014A62D1/0071C09K3/22E21F5/12
    • Foamed material composed of water and limestone or other mineral dust suspended in a pregenerated foam is applied to the surface of a mine. Dry limestone dust or mineral dust is blended with pregenerated foam or foam generated in situ to produce a mass of foamed material that is highly vesicular but that is cohesive enough to be sprayed as a foamed mass against mine wall surfaces and ceilings. The foamed material is applied with a spray device that allows it to adhere to the surfaces of the mine. In another embodiment a dry powder formulation containing limestone dust, dry powder foaming agent and an additive that promotes the production of gas which effervesces upon contact with water can be used. The dry powder formulation can be applied by mixing it with water during application or by applying it to a wet surface. The foamed material can be built to a thickness suitable for the prevention and suppression of fires caused by the ignition of coal dust and methane gas. Once applied, the low water content of the foamed material permits evaporation of the water, resulting in a dry mass of fine, poorly-cohesive, vesicular material that dusts readily.
    • 将由水和石灰石或悬浮在预生泡沫中的其他矿物粉末组成的发泡材料施加到矿山表面。 干燥的石灰石粉尘或矿物粉末与在原地产生的预发泡泡沫或泡沫混合,以产生高度水泡的大量泡沫材料,但是其具有足够的粘合性,可以作为发泡团块喷洒在矿井壁表面和天花板上。 发泡材料被施加有允许其附着在矿山表面上的喷雾装置。 在另一个实施方案中,可以使用含有石灰石粉,干粉发泡剂和促进产生与水接触时产生气体的添加剂的干粉配方。 干粉配方可以通过在施用期间将其与水混合或通过将其施用于湿表面来施用。 泡沫材料可以被制成适合于防止和抑制由煤尘和甲烷气体点燃引起的火灾的厚度。 一旦应用,发泡材料的低水含量允许水的蒸发,导致干质量的细小的,不良的粘性的水泡物质,容易粉化。