| Patents for C21C 7 - Treating molten ferrous alloys, e.g. steel, not covered by groups (11,430) |
|---|
| 05/29/1990 | US4928931 Cap formation, rupturing |
| 05/16/1990 | EP0190313B1 Method and apparatus for continuous steelmaking |
| 05/08/1990 | US4923675 Manganese alloying additive melt, nitrogen-containing plasma, saturation |
| 05/02/1990 | EP0366293A2 Tri-level method and apparatus for post melting treatment of molten steel |
| 05/02/1990 | CN1007824B Apparatus for degassing molten metal |
| 05/01/1990 | US4921533 Ferro-aluminum composite pig |
| 04/25/1990 | EP0364724A1 Gas washing device |
| 04/25/1990 | EP0364723A1 Gas bubbling device |
| 04/25/1990 | EP0364722A1 Oxygen blast pipe |
| 04/25/1990 | EP0264385B1 Injection of substances into high temperature liquids |
| 04/25/1990 | CN1041617A Gas bubbling device |
| 04/25/1990 | CN1041616A Gas bubbling brick |
| 04/25/1990 | CN1041615A Gas bubbling device |
| 04/24/1990 | US4919714 Method and apparatus for refining steel |
| 04/24/1990 | CA1268044A1 Manufacture of calmed steel with low nitrogen content |
| 04/19/1990 | DE3934435A1 Niederlegierter gussstahl Niederlegierter cast steel |
| 04/18/1990 | EP0363749A1 Process for dephosphorizing molten metals by treating with alkali metals and alkaline earth metals |
| 04/18/1990 | EP0363651A1 Gas purging brick |
| 04/18/1990 | EP0363464A1 Refractory-gas permeable bubbling plug |
| 04/18/1990 | CN1041395A Desulphurising agent for iron melts, process for producting thereof, and process for desulphursing iron melts by using same |
| 04/18/1990 | CN1041301A Method and apparatus for pouring hollow ingot with electroslags |
| 04/17/1990 | US4918282 Method and apparatus for heating molten steel utilizing a plasma arc torch |
| 04/17/1990 | CA1267766A1 Preventing undissolved alloying ingredient from entering continuous casting mold |
| 04/12/1990 | DE3931656A1 Dephosphorising ferrous melts - by blowing with mixt. of alkaline earth alkali metal and corresp. halide followed by oxygen treating |
| 04/11/1990 | EP0362851A2 Method for cleaning molten metal |
| 04/10/1990 | US4915362 Carbon dioxide snow nozzle for metallurgy |
| 04/05/1990 | DE3833325A1 Process for the continuous casting of magnesium-containing high-strength cast iron |
| 04/04/1990 | CN1007433B Process for removing impure element from pig iron, steel, other metals and alloys |
| 04/04/1990 | CN1007432B Process for smelting high alloy steels in oxygen-blowing coverter |
| 04/04/1990 | CN1007411B Disinfection disposal of aluminium slag |
| 03/28/1990 | EP0359828A1 Method for detecting slag flow |
| 03/28/1990 | CN2055138U Integral spray gun for steel ladle argon blowing |
| 03/28/1990 | CN1007358B Electroslag refining process for molten casting iron of cupola furnace |
| 03/27/1990 | US4911414 Sealing injection apparatus for injecting substances into molten metals |
| 03/27/1990 | CA1266970A1 Nozzle arrangement for injecting gases or solid matter into a ladle containing molten metal |
| 03/20/1990 | US4909844 Fused matrix of calcium, iron, aluminum, magnesium oxide |
| 03/20/1990 | US4909838 Coated magnesium granules |
| 03/20/1990 | US4909836 Apparatus and a method for improved filtration of inclusions from molten metal |
| 03/14/1990 | EP0357795A1 Radiation construction method for molten metal outflow port, its apparatus and recess radiating impeller used for said apparatus |
| 03/14/1990 | CN1040394A Metallurgical device (cn) |
| 03/08/1990 | WO1990002208A1 Method for producing general-purpose steel |
| 03/07/1990 | EP0356943A1 Wear resistant metallurgical tuyere |
| 03/06/1990 | US4906435 Activator mixture for increasing the strength of iron alloys |
| 03/06/1990 | US4906292 Composite article having a tubular sheath containing a compacted material, for the treatment of liquid metals, and process for the production of said article |
| 02/28/1990 | EP0355526A2 Desulphurising flux composition for basic steel-slags and relevant method |
| 02/28/1990 | EP0355163A1 Process for producing molten stainless steel |
| 02/28/1990 | CN1040059A Method for producing silicon aluminium-iron as steely deoxidant |
| 02/27/1990 | US4903948 Metallurgical vessel |
| 02/14/1990 | EP0354897A1 Method and apparatus for heating molten steel |
| 02/14/1990 | CN2052688U High concentration powder spraying fluidization device |
| 02/14/1990 | CN1039651A Device for separating slag and steel |
| 02/13/1990 | US4900357 Injection of substances into high temperature liquids |
| 02/13/1990 | US4899992 Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals |
| 02/08/1990 | WO1990001071A1 Method for producing general-purpose steel |
| 02/07/1990 | EP0354039A2 Inoculant dispensing apparatus for molted metal ladle |
| 02/07/1990 | CN1039447A Process for heating steel melts as well as device for performing this process |
| 02/07/1990 | CN1039372A Mehtod of disintegration of ferroalloys |
| 02/07/1990 | CN1006720B Cermet oxygen-blow pipe |
| 02/07/1990 | CN1006719B Granular desulfuring agent of melting iron and process for desulfuration of melting iron |
| 02/06/1990 | US4898369 Lance with metered core for treating molten metal |
| 02/06/1990 | US4898368 Wear resistant metallurgical tuyere |
| 02/06/1990 | US4898367 Dispersing gas into molten metal |
| 01/30/1990 | US4897114 Nitrogen-containing additive for steel melts |
| 01/25/1990 | WO1990000630A1 Fe-Mn-Al-C ALLOYS AND THEIR TREATMENT |
| 01/24/1990 | EP0352254A2 Process for heating steel melts |
| 01/24/1990 | EP0351762A2 Process for producing high cleanness extra low carbon steel |
| 01/23/1990 | CA1264544A1 Ceramic filter and method for using same |
| 01/16/1990 | US4894087 Simplified method and apparatus for treating molten steel |
| 01/09/1990 | US4892580 Lead-containing additive for steel melts |
| 01/03/1990 | EP0349523A2 Installation for the separation of slag from steel |
| 01/02/1990 | US4891063 Mathematical equations |
| 12/27/1989 | EP0347884A2 Process for vacuum degassing and decarbonization with temperature drop compensating feature |
| 12/20/1989 | EP0347351A1 Process for treating molten steels by the injection of gas through the bottom of the ladle |
| 12/20/1989 | CN1038127A Dephosphorization in cupola furnace |
| 12/13/1989 | EP0179865B1 Process for controlling slag chemistry in a refining vessel |
| 12/07/1989 | DE3818000A1 Installation for treating molten metals |
| 12/05/1989 | US4885145 For desulfurization of fuel gases from incomplete combustion of sulfur-containing hydrocarbons |
| 12/05/1989 | US4884786 Apparatus for generating a vortex in a melt |
| 11/29/1989 | EP0344092A2 Thermal treatment installation for molten metal |
| 11/29/1989 | CN1037544A Blow purifying device |
| 11/29/1989 | CN1037543A Process of desulfuration of foundry iron |
| 11/23/1989 | EP0342395A1 Device for introduction of powdery agents into a melting ladle |
| 11/21/1989 | US4881990 Steel product with globular manganese sulfide inclusions |
| 11/21/1989 | US4881972 Process for feeding heat energy into a molten metal bath |
| 11/15/1989 | EP0342132A1 Process for the desulfurization of pig iron |
| 11/15/1989 | CN2047667U Oxygen lance for fuel |
| 11/14/1989 | CA1262826A1 Molten metal casting |
| 11/08/1989 | EP0340893A1 Removal of nitrogen from iron |
| 11/08/1989 | EP0340711A2 Process and installation for adding alloying products to a molten metal stream |
| 11/07/1989 | CA1262636A1 Pre-refining treatment of metals and alloys |
| 11/07/1989 | CA1262634A1 Process for the removal of contaminating elements from pig-iron, steel, other metals and metal alloys |
| 10/31/1989 | US4877449 Vertical shaft melting furnace and method of melting |
| 10/25/1989 | EP0338569A2 Method of disintegration of ferroalloys |
| 10/25/1989 | CN1036522A Brick for gas-blowing wash |
| 10/24/1989 | US4875934 Method of deoxidizing molten ferrous metals |
| 10/19/1989 | WO1989009836A1 Refractory-gas permeable bubbling plug |
| 10/18/1989 | EP0337982A1 Refractory gas permeable bubbling plug |
| 10/18/1989 | EP0337114A1 Process for preparation of a casting having MnS dispersed and uniformly and finely precipitated therein |
| 10/17/1989 | US4874428 Fluidizing a lime-silica slag |
| 10/11/1989 | EP0198910B1 Process and device for detecting slag |