Topic
Calcium oxide
About: Calcium oxide is a research topic. Over the lifetime, 7600 publications have been published within this topic receiving 66104 citations. The topic is also known as: caustic lime & quicklime.
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Patent•
27 Nov 2009
TL;DR: In this article, an environment-friendly synthetic timber and a fabrication method thereof are provided to emit far-infrared rays for health improvement, which includes: pulverized natural wood powder; polypropylene(PP) or high density polyethylene(HDPE); maleic anhydride PP as a binder; phosphate-based antioxidant and calcium stearate; bis-2,2,6, 6,6-tetramethyl-4-piperidil as a photostabilizer; 2-(2'-hydroxy-3'-ter
Abstract: PURPOSE: An environment-friendly synthetic timber and a fabrication method thereof are provided to emit far-infrared rays for health improvement. CONSTITUTION: An environment-friendly synthetic timber comprises: pulverized natural wood powder; polypropylene(PP) or high density polyethylene(HDPE); maleic anhydride PP as a binder; phosphate-based antioxidant and calcium stearate; bis-2,2,6,6-tetramethyl-4-piperidil as a photostabilizer; 2-(2'-hydroxy-3'-tert-butyl-5'-methyl-phenyl)-5-chlorobenzotriazol as a UV-absorber; polyethylene wax or polypropylene wax; one or more selected from the group consisting of jade, germanium, hardwood charcoal, loess, magnesium oxide, calcium oxide, aluminium oxide, and ferric oxide; and inorganic pigment.
17 citations
TL;DR: In this paper, the leaching corrosion of asbestos cement pipes and its influence on their durability and failure in service was described and analyzed. But, the authors did not consider the impact of free lime content on the porosity and permeability of the asbestos cement pipe.
17 citations
TL;DR: In this article, the effects of few variables on calcination and carbonation reaction of CaCO 3 via thermo-gravimetric analyzer (TGA) in order to optimize the process.
17 citations
Patent•
15 Jul 2009
TL;DR: In this article, a method and a system for the production of calcium carbide is presented, which can overcome the disadvantages of high energy consumption and high pollution of the prior art for the calcite production, and has advantages of having wide range for selecting raw materials, high energy utilization ratio, continuous operation, and large producing ability.
Abstract: Provided are a method and a system for the production of calcium carbide. The method comprises mixing powdery carbon-containing raw material with powdery calcium-containing raw material; directly heating the mixture by combusting a part of carbon-containing raw material in an oxygen-containing atmosphere to produce calcium carbide. The carbon-containing raw material can be coal, semi-coke or coke, the calcium-containing raw material can be calcium carbonate, calcium oxide, calcium hydroxide or carbide slag. The provided system for the production of calcium carbide comprises a raw material preheating unit and a reaction unit. The preheater of the raw material preheating unit can be fluidized bed or entrained flow bed, the reactor of the reaction unit is entrained flow bed. The provided can overcome the disadvantages of high energy consumption and high pollution of the prior art for the calcium carbide production, and has advantages of having wide range for selecting raw materials, high energy utilization ratio, continuous operation, and large producing ability. By using the combustion of the by-product CO produced during the production of calcium carbide or auxiliary fuel in the air to preheat the raw materials to 500-1500 DEG C, the carbon consumption and the oxygen consumption for the calcium carbide production can be reduced, thus process energy consumption is further reduced.
17 citations
01 Jan 1989
TL;DR: In this paper, the activation of granulated blast furnace slag (GBFS) and slag fly ash/burn clay pozzolana mixes in presence of lime and lime with gypsum is discussed.
Abstract: This paper deals with the activation of granulated blast furnace slag (GBFS) and slag-fly ash/burn clay pozzolana mixes in presence of lime and lime with gypsum. The paper highlights the effectiveness of lime- GBFS mix with and without additives as an alternative binding material. It includes mortar studies and stabilisation of alluvial soil with lime-GBFS mixes. Investigations showed that strength development of 1:3 mortar was highest when 7.5 per cent gypsum was also added to lime-GBFS mix. The alluvial soils could be satisfactorily stabilised with both lime-GBFS and lime-GBFS with 7.5 per cent gypsum or by replacing 20 per cent of GBFS with fly ash. (A)
17 citations