Translation of "Gebranntem kalk" in English

Subsequently, the iron sponge particles are humidified with water and agitated in lime.

The essential constituent CaO is used in the form of burnt lime.

Women colored their hair to a light red hue with unslaked lime.

The ammonia as a rule is recovered from the ammonium chloride by being treated with burnt lime.

To remove these non-sugar components, the unrefined juice is blended with milk of lime and quicklime.

This dry mixture is obtained by an “in situ” process from aqueous perchlorate salt solution and burnt lime.

The Lhoist Group offers a wide range of mineral, calcic lime and dolomitic lime-based products.

The term "made and burnt" is unclear, but making one ton of quicklime usually requires two tons of limestone.

It is preferred to use calcium oxide or materials containing the same in the form of mixtures of quicklime and hydrate of lime.

The stonework of Goslar's Zwinger was predominantly made of sandstone quarried from the Sudmerberg northeast of Goslar and mortared with burnt lime.

In other words, it is necessary by preliminary tests to determine in each particular case the exact quantity of hydrate of lime or quicklime, which should be added to the raffinates so as to have a reaction suspension producing a filter cake which has a pH-value within the range 9 to 14, in aqueous suspension.

The ammonia is recovered from the ammonium chloride usually by treatment with burnt lime according to the equation:

German Patent Application P 29 25 897.7 also provides for the hot hearth furnace coke to be mixed with quicklime (CaO) and for the resulting mixture to be admitted to the reaction zone in the oxygen-thermal furnace, the hot coke being admixed with a quantity of quicklime, which naturally becomes preheated thereby, necessary for the resulting lime/coke-mixture to assume a temperature of about 600° C. or less, ahead of the reaction zone.

The present invention relates more particularly to a process for making calcium carbide by reacting an excess of coke with quicklime in the presence of oxygen in an oxygen-thermal furnace, which comprises: using precrushed coal as a starting material for coke and precrushed lime hydrate (Ca(OH)2) or precrushed limestone (CaCO3) as a starting material for quicklime; mixing the precrushed materials, introducing the resulting mixture into a drying zone and freeing it therein at 80° to 120° C. from adhering water; introducing the warm mixture coming from the drying zone, and air, into a calcining apparatus the coal constituent being coked and the lime constituent being simultaneously dehydrated or decarbonized therein at temperatures of 900° to 1400° C.; directly delivering the thermally pretreated mixture of starting materials with an inherent temperature of 900° to 1000° C. to the oxygen-thermal furnace; and reacting it with oxygen to produce calcium carbide therein.

German Patent Application P 29 25 897.7 also provides for the hot hearth furnace coke to be mixed with quicklime (CaO) and for the resulting mixture to be admitted to the reaction zone in the oxygen-thermal furnace, the hot coke being admixed with a quantity of quicklime, which naturally becomes preheated thereby, necessary for the resulting lime/coke-mixture to assume a temperature of about 600° C. or less, ahead of the reaction zone.

Results which are similarly good to those obtained with diamide lime can be achieved with calcium hydroxide which is also obtained in very finely divided form by the hydration of calcined lime (CaO).

It has proved disadvantageous to use powdery fine lime in the form of hydrated lime or calcined limestone, because powdery fine lime is, for the major part, carried out together with the injected gas and only a minor amount is available for the desulfuration reaction within the melting space.

The actually predominant technological process for the production of calcium carbide in electric low-shaft furnaces from calcined lime and carbonaceous compounds, i.a., has the disadvantage that, to a major extent, high-quality starting materials, such as, e.g., expensive grades of lumpy coke and/or anthracite, as well as an excess of lime must be employed in order to keep the electric resistance and the gas-passage behavior through the burden mixture sufficiently favorable so as to ensure a problem-free tapping of the molten calcium carbide.

In particular in the case of a solution containing ammonium sulphate, the ammonia is released and driven off by the addition of quicklime, milk of lime, calcined dolomite or sodium hydroxide solution or sodium carbonate and heating so that it may be used again.

For drying and rectification of the azeotropes they are preferentially dosed via the connecting line (20) into the kneading drier for chemical drying with burnt lime (12) and, after the dehydration, they are isolated in the rectification column (14) connected with.

In the case of using lime and lime products as slaked or burnt lime as a base a utilisation of the solid residue at the cement production is given without a preliminary neutralisation of the residue, because the contents, calcium sulphate and calcium oxide or calcium hydroxide, as well as quartz are raw materials for the production of cement.

In a modification of Example 6, the jointing mortar without addition of hydrophobicizing agent (jointing mortar L) was mixed with 0.5% of a powder produced as described in GB-A-1217813 from 30 parts by weight of siloxane a, 5 parts by weight of water, 2 parts by weight of a polyvinyl alcohol containing 20% of vinyl acetate units and having a degree of polymerization of 2000 and 63 parts by weight of quicklime (CaO) (gives jointing mortar V3).

FIG. 7 demonstrates how the liquid is mixed in a mixing valve 12 with a suspension of suspended, burnt dolomite (MgO/CaO) or a suspension of a suspended mixture of burnt dolomite and burnt lime.

EP-A 0 138 417 describes a mixture composed of burnt lime, lime-stone-carbon and fluospar.

It is particularly preferred to use calcium oxide or material containing the same in the form of a proportion of about two-thirds quicklime and a proportion of about one-third hydrate of lime.

The present invention relates to a process for converting raffinates which are obtained in the decontamination of phosphoric acid by extraction with a solvent, to solid deposition products, wherein the water-containing raffinates are reacted with solid hydrate of lime or quicklime.