| Patent Number |
Title Of Patent |
Date Issued |
| 5114693 |
Process for the production of silicon nitride and product made according to the process |
May 19, 1992 |
| The present invention provides a process for the production of silicon nitride by the reaction of silicon and nitrogen, wherein, in one reaction step, silicon powder is reacted with nitrogen which continuously rotates at a temperature of from 1000.degree. to 1800.degree. C. and at a pres |
| 4943317 |
Agent for desulphurizing iron melts, a process for the production thereof and a process for desu |
July 24, 1990 |
| The present invention provides an agent for desulphurizing iron containing calcium carbide and a metallic component, wherein the calcium carbide and the metallic component are present in such a form that the bulk densities and grain sizes thereof lie in the same range.The present inventi |
| 4832739 |
Process for desulfurizing molten iron |
May 23, 1989 |
| A process for desulfurizing molten iron using a fine-grain agent consisting essentially of industrial calcium carbide, a dried coal, the coal containing at least 15% by weight of volatile components, and fine-grained magnesium and which agent is injected in fluidized form into an iron me |
| 4764211 |
Fine-grained agent for desulfurizing molten iron |
August 16, 1988 |
| A fine-grained agent for desulfurizing molten iron comprising industrial calcium carbide, dried coal which contains at least 15% by weight of volatile constituents and which, immediately after being passed into the molten iron, releases at least 80 standard liters of gas per kg of coal, |
| 4592777 |
Method, process and composition for desulfurizing pig-iron melts |
June 3, 1986 |
| A method and composition for desulfurization of hot metal is disclosed. To the hot metal there is added a composition comprising calcium carbide, a hydrogen releasing compound and magnesium. |
| 4540436 |
Treatment agent for cast iron melts and a process for the production thereof |
September 10, 1985 |
| The present invention provides a treatment agent for cast iron melts based upon ferrosilicon magnesium with a silicon content of from 40 to 80% by weight and a magnesium content of from 0.5 to 15% by weight, said agent being in the form of granules with a specific surface area of from 0. |
| 4430118 |
Desulfurization agent |
February 7, 1984 |
| The present invention provides a desulphurizing agent, especially for iron melts, based upon calcium carbide and diamide lime, wherein it contains a diamide lime which has been post-treated by flotation or air sifting. The diamide lime used preferably contains 18 to 40% of free carbon. |
| 4315773 |
Desulfurization mixture and process for desulfurizing pig iron |
February 16, 1982 |
| Process and composition for desulfurizing pig iron in which the desulfurization agent consists essentially of calcium carbide, a gas-evolving component and fluorspar; the advantage of the process and composition is that it reduces dust pollution and danger of flaming in the handling |
| 4260413 |
Desulfurizing composition, process for producing them and desulfurization of pig iron and steel |
April 7, 1981 |
| Improved desulfurization of ferrous melts is obtained by injecting into the melt a readily-flowable desulfurization composition composed of a desulfurization agent, such as calcium carbide or the like and, if desired, an additional component in which the particles are finely ground w |
| 4194902 |
Desulfurization agent for ferrous melts and method of using the same |
March 25, 1980 |
| Improved desulfurization of ferrous melts is obtained by injecting into the melt in finely divided form a mixture by weight 48% to 95% calcium carbide, 2% to 40% of carbon-containing calcium carbonate and from about 1% to 12% of high volatile, bituminous coal dust. |
| 4154606 |
Composition and method for the desulfurization of molten iron |
May 15, 1979 |
| Finely granular desulfurizing agents for iron melts, consisting of at least one alkaline earth metal carbonate and at least one reducing metal carbide and optionally a reducing metal or an alloy thereof, are outstandingly effective in desulfurizing action and, based on the high degree of |
