5results about How to "Uniform temperature gradient" patented technology

The invention discloses a copper smelting method of an Ausmelt furnace without a top-blowing spray gun, and relates to the technical field of copper smelting of the Ausmelt furnace, and the copper smelting method comprises the following steps: (1) spraying coal powder and mineral powder into a molten pool through an ore gun and a coal gun of the Ausmelt furnace without the top-blowing spray gun; (2) a side-blowing combustion gun of the Ausmelt furnace without the top-blowing spray gun sprays fuel to the molten pool; and (3) when the copper matte reaches the target grade 58-62%, ending the reaction, recording the melt temperature distribution, measuring the viscosity of the slag, and taking the slag sample for analyzing the content of Fe3O4. The Ausmelt furnace without the top blowing spray gun comprises a flue, a baffle, a combustion gun, an ore gun and a coal gun, a flue is arranged on the upper portion of the furnace body, a baffle is arranged below the flue, combustion guns are symmetrically arranged on the furnace body above a slag layer, coal guns are symmetrically arranged on the furnace body at the junction of the slag layer and a molten copper bath, ore guns are symmetrically arranged on the furnace body at a molten copper bath layer, and pressure gauges are arranged on the ore guns and the coal guns.

The invention relates to the technical field of precious metal metallurgy, and discloses a high-density iridium ingot sedimentation type smelting process which comprises the following steps: preparing a water-cooled copper crucible with a zirconium oxide inner wall coating; iridium powder and calcium oxide powder are mixed and put into a crucible; performing induction heating in a vacuum environment until the raw materials are molten; protective gas is inflated, periodic variable-pressure oscillation operation is applied under the condition that the temperature of the melt is kept, and slag crust on the surface of the melt is destroyed through pressure fluctuation and deep gas is promoted to be exhausted; after oscillation is stopped, the melt is left to stand, and a slag system floats upwards and is separated; and establishing a bottom-to-top temperature gradient to control directional solidification of the melt. According to the invention, oxide hard shells are destroyed through a variable-pressure oscillation mechanism, and efficient degassing and impurity removal are realized by cooperating with calcium oxide slagging; the zirconia coating effectively prevents the crucible material from being polluted; the directional solidification and hot isostatic pressing process eliminates internal shrinkage cavities and looseness. According to the process, the impurity content in the iridium ingot is remarkably reduced, and the purity and compactness of the material are improved.

The invention discloses a copper smelting method of a slag-metal double-weir non-immersion top-side collaborative injection Ausmelt furnace, and relates to the technical field of copper smelting of Ausmelt furnaces, and the copper smelting method comprises the following steps: (1) injecting coal powder and mineral powder into a molten pool through a side-blowing coal gun and a mineral gun of the double-weir and mineral-coal collaborative injection Ausmelt furnace; (2) hot air is blown through a central combustion gun lowered from the top of the Ausmelt furnace with double weir crests and mineral coal collaborative blowing, and a side blowing combustion gun is used as heat supplement; and (3) after the reaction is finished, raising the central combustion gun, recording the temperature distribution of the melt, detecting the viscosity of the molten slag, and taking a slag sample for analyzing the content of Fe3O4. The Ausmelt furnace comprises a flue, a central combustion gun, a side-blowing combustion gun, a slag hole, a side-blowing ore gun, a side-blowing coal gun and a siphon weir crest, according to the method, the problem that the viscosity of slag is increased in the conventional Ausmelt furnace copper smelting process is solved, and the production efficiency is greatly improved.

This invention relates to the field of crystallizer technology and discloses a continuous scraper crystallizer with a single water-cooling path. It includes a crystallizer shell, inside which multiple cooling plates are fixed. Each cooling plate has a cooling water flow channel, and adjacent cooling plates are connected in series via connecting pipes. An air-cooled box is installed at the top of the crystallizer shell, and the top portion of the connecting pipe extends into the air-cooled box. A stirring shaft is rotatably mounted inside the crystallizer shell, driven by a rotary motor. A stirring and scraping crystallization mechanism is installed on the outside of the stirring shaft at a position corresponding to the cooling plate. This invention, due to its single cooling water path, provides a uniform temperature gradient, excellent crystallization effect, and high product purity and yield. The inner wall of the crystallizer shell is rigorously polished to ensure a roughness ≤0.1nm, virtually eliminating wall adhesion and facilitating smoother production.

The invention discloses a tread rubber stub bar heating device, and relates to the technical field of rubber stub bar heating, the tread rubber stub bar heating device comprises a support frame, a motor is fixedly mounted on the right side of the support frame, a heating frame is fixedly mounted on the top of the support frame, a heater is fixedly mounted on the top of the heating frame, and a cover door is rotatably mounted on the front side of the heating frame; a feeding groove is fixedly formed in the rear side of the heating frame, a conveying device is arranged at the top of the supporting frame, a discharging frame is placed at the top of the conveying device, a chopping device is further arranged at the top of the supporting frame, when the feeding groove is not sealed, part of heat can be brought away by air, the heating efficiency is reduced, the heating time is prolonged, and the cutting efficiency is improved. And non-uniform heating of the sizing material is possibly caused, so that the performance and quality of the sizing material are influenced.