Dolomitic limes

Mutoclaved lime is a special form of highly hydrated dolomitic lime, used largely for stmctural purposes, that has been hydrated under pressure in an autoclave. 

Ib/ft ). Again, dolomitic limes average about 4% denser than their high calcium counterparts. The severity of the calcination process largely determines the porosity of a quicklime the higher the temperature of calcination and the longer its duration, the more the porosity declines. 

Miscellaneous. Both whiting and hydrated lime are used as diluents and carriers of pesticides, such as lime—sulfur sprays, Bordeaux, calcium arsenate, etc. The most widely used bleach and sterilizer, high test calcium hypochlorite, is made by interacting lime and chlorine (see Bleaching AGENTS). Calcium and magnesium salts, such as dicalcium phosphate, magnesium chloride, lithium salts, etc, are made directly from calcific and dolomitic lime and limestone. 

Two types of magnesia, caustic-calcined and periclase (a refractory material), are derived from dolomitic lime. Lime is required in refining food-grade salt, citric acid, propjiene and ethylene oxides, and ethylene glycol, precipitated calcium carbonate, and organic salts, such as calcium stearate, lactate, caseinate. 

The Bechtel confined zone dispersion (BCZ) process involves the injection of a fine slurry mist of pressure hydrated dolomitic lime or calcitic lime, using two-fluid atomizing nozzles. A demonstration at the 70 MWe Seward Station of the Pennsylvania Electric Co., performed in 15.2 m of ductwork with a 2.4-m by 3.4-m cross section, achieved a 50% removal of SO2 at a Ca S ratio around 1.1. 

Lime is among a family of chemicals which are alkaline in nature and contain principally calcium, oxygen and, in some cases, magnesium. In this grouping are included quicklime, dolomitic lime, hydrated lime, dolomitic hydrated lime, limestone, and dolomite. The most commonly used additives are quicklime and hydrated lime, but the dolomitic counterparts of these chemicals (i.e., the high-magnesium forms) are also widely used in wastewater treatment and are generally similar in physical requirements. 

CZD [Combined zone dispersion] Also called Bechtel CZD. A flue-gas desulfurization process in which a slurry of a chemically reactive form of lime (pressure-hydrated dolomitic lime) is injected into the duct. The water in the slurry evaporates quickly and the solid product is collected downstream in an electrostatic precipitator. Developed by Bechtel International in the late 1980s, intended for retrofitting to an existing plant. 

Calcium oxide is a white caustic crystalline alkali substance that goes by the common name lime. The term lime is used both generically for several calcium compounds and with adjectives to qualify different forms of lime. This entry equates lime, also called quicklime or burnt lime, with the compound calcium oxide. Hydrated lime, made by combining lime with water, is calcium hydroxide and is often referred to as slaked lime (Ca(OH)2). Dolomite limes contain magnesium as well as calcium. Limestone is the compound calcium carbonate. The term lime comes from the Old English word lim for a sticky substance and denotes lime s traditional use to produce mortar. Calx was the Latin word for lime and was used to name the element calcium. 

Andersson, S., I. Nilsson, and I. Valeur. 1999. Influence of dolomitic lime on DOC and DON leaching in a forest soil. Biogeochemistry 47 297-317. 

High (e.g. 50-80 X 103 lb/in.2) 8-16 Metal powders (zinc, vanadium etc.), calcined dolomite, lime, magnesia, magnesium carbonate, sodium and potash compounds, hay and straw Fly-ash, raw and reduced iron ores Fly-ash, iron oxides, raw and reduced iron ores, scrap... 

Magnesium hydroxide is produced by precipitation of the magnesium ions with Ca(OH)2 obtained from dolomitic limestone. The limestone is calcined in a rotary kiln to produce lime the lime is reacted with water to give Ca(OH)2, which reacts with the Mg ions in the brine to give Mg(OH)2. One-half of the Mg(OH)2 comes from the dolomitic lime. The slurry of Mg(OH)2 in the CaCl2 brine is thickened in settling tanks and filtered, and the CaCl2 is washed out of the cake with water. 

Bechtel Seawater A flue-gas desulfurization process using a suspension of dolomitic lime in seawater. The calcium sulfate produced is returned to the sea. A conceptual design, not known to have been piloted. 

High 50,000-80,000 8-16 Aluminum, copper, zinc, vanadium, calcined dolomite, lime, magnesia, magnesium carbonates, sodium chloride, sodium and potassium compounds Flue dust, natural and reduced iron ores Flue dust, iron oxide, natural and reduced iron ores, scrap metals... 

Basal dressing is advisable if the results of the soil test indicate that there is an inadequate supply of nutrients in the soil. Only products specified in Annex II of EU Regulation 2092/91 should be considered for use as fertilizers and soil conditioners. If the pH is too low, the soil should be limed with up to 2000-3000 kg of calcium carbonate/ha per year (0.2-0.3 kg/m ), or with dolomitic lime if there is also magnesium deficiency. If there is not enough humus, it is advisable to enrich the soil with organic matter (see section in Chapter 4 on Organic fertilizers for soil conditioning). 

If young leaves are pale and growing tips die, the problem may be calcium deficiency. Add high-calcium lime, dolomitic lime if magnesium is also low, wood ashes, or gypsum to the soil. 

Aluminum, copper, zinc, vanadium, calcined dolomite, lime, magnesia, magnesium carbonates, sodium chloride, sodium and potassium compounds... 

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