7 results about "Low copper" patented technology

The present invention relates to a chemical mechanical polishing composition comprising (a) 0.1 to 20 wt% of abrasive particles; (b) 10 to 500 ppm of NH4 < + > and / or NH3 molecules, wherein the NH4 < + > and / or NH3 molecules are selected from one or more combinations of any substances containing the NH4 < + > and / or NH3 molecules; (c) a complexing agent, wherein the complexing agent is selected from one or a combination of more of organic acid compounds or amino acid compounds; (d) water; the chemical mechanical polishing composition comprises double oxidation potentials on the surface of copper after being in contact with the copper, the double oxidation potentials comprise a first copper oxidation potential and a second copper oxidation potential, the first copper oxidation potential is less than 0V and the second copper oxidation potential is between 0.005 V and 0.40 V relative to a reference electrode Ag / AgCl potential; the chemical mechanical polishing composition can achieve higher copper removal rates, lower copper surface roughness, and lower butterfly recesses, as well as improve the selectivity of copper relative to low dielectric materials.

The application discloses a low copper loss double-side blown bath smelting method and belongs to the technical field of copper pyrogenic smelting. The method constructs a vertical oxygen potential gradient in the same smelting furnace: 70%-85% of oxygen-rich air is blown into the tuyere at the lower part of the furnace body to form a strong oxidation smelting zone; and a reducing medium such as natural gas or pulverized coal is sprayed into the slag layer at the upper part of the furnace body to form a weak reduction clarification zone. The amount of the reducing medium sprayed is dynamically adjusted by on-line monitoring of the CO content in the flue gas or the Fe3O4 content in the slag, and the Fe3O4 content in the slag is controlled to be 3%-6%. The method efficiently reduces Fe3O4 in the slag into FeO, significantly reduces the viscosity of the molten slag, and improves the slag-ice-copper separation condition, so that the copper content in the discarded slag is stably reduced from more than 1.8% in the conventional method to less than 1.3%, and the metal recovery rate is improved. Meanwhile, the method realizes integration of smelting and tempering, simplifies the process, reduces energy consumption, and enhances the adaptability to complex raw materials.

This invention relates to a method for the synergistic separation of iron and copper-zinc in zinc sulfate solution using ultrasonic-enhanced goethite, belonging to the field of hydrometallurgical technology. This invention separates iron and copper-zinc from zinc sulfate solution containing Fe. 2+ Cu 2+ and Zn 2+ An acidic zinc sulfate solution was placed in an ultrasonic field, and an oxidant was slowly added to pre-oxidize the solution until Fe was added. 3+ A pre-oxidized acidic zinc sulfate solution with a concentration of 0.01~1.00 g / L was obtained. Goethite seed crystals and a copper-zinc liquid phase stabilizer were added to the pre-oxidized acidic zinc sulfate solution and mixed evenly. A neutralizing agent was added under ultrasonic conditions to adjust and control the pH of the solution system to 2.5~4.0, and the reaction proceeded. This caused the iron in the solution system to form a goethite precursor and directionally crystallize into α-FeOOH. At a pH of 2.5~4.0, the ultrasonic density was adjusted to promote the directional crystallization of Fe until the Fe concentration in the solution did not exceed 0.1 g / L. This allowed the directionally crystallized α-FeOOH particles in the solution system to grow in an orderly manner and inhibited disordered flocculation and agglomeration. Solid-liquid separation yielded a goethite precipitate with low copper and zinc entrainment and a copper-zinc enriched purification solution. This invention can achieve efficient removal of iron and low loss retention of copper and zinc.

The invention discloses a copper-manganese alloy plate strip with ultralow copper thermal electromotive force and a preparation method of the copper-manganese alloy plate strip, and belongs to the technical field of non-ferrous metal smelting and rolling machining. The copper-manganese alloy plate strip comprises the following raw materials in percentage by mass: 11.0%-13.0% of Mn, 2.0%-3.0% of Ni, 0.1%-1% of Ce, 0.5%-1.5% of Nd, less than or equal to 0.25% of Si, 0.25%-0.5% of Fe and the balance of Cu; wherein the mass ratio of Ce to Nd is (0.07-2): 1, and alloy grains can be refined to 5-10 [mu] m. The preparation method comprises the following steps: sequentially performing casting, forging, hot rolling and solid solution heat treatment on raw materials to obtain a hot-rolled coil; carrying out surface milling, rough rolling, first annealing and medium finish rolling treatment to obtain a medium finish rolling plate strip; and finally, carrying out secondary annealing, finish rolling, withdrawal and straightening and finished product annealing treatment to obtain a copper-manganese alloy finished product plate strip. Through the unique rare earth element ratio and strict process control, the alloy plate strip with fine grains and uniform structure is obtained, the thermoelectric force of the alloy plate strip to copper is remarkably reduced, the performance is stable, and the high requirements of the fields of precision resistors and the like are met.

The invention relates to a method for treating semi-autogenous grinding hard rock through dump leaching of low-copper raffinate, and solves the problems of power consumption increase, treatment capacity reduction and cost increase caused by the fact that returned hard rock occupies part of the treatment capacity of a semi-autogenous grinding machine in an existing method. The method comprises the following steps: 1) crushing the copper oxide cobalt ore, grinding the crushed copper oxide cobalt ore in a semi-autogenous mill, leaching screen underflow for H2SO4 acid leaching, and extracting a low-copper solution generated after CCD (Charge Coupled Device) washing after leaching to generate low-copper raffinate; (2) the hard rock is transferred to a dump leaching site to be stacked, then low-copper raffinate is used for conducting spraying leaching on the hard rock, and copper-cobalt leaching liquid obtained after leaching is mixed with the low-copper raffinate to conduct repeated spraying leaching on the hard rock heap; 3, a part of the low-copper raffinate enters a thickener to remove iron, a part of the low-copper raffinate is mixed with dump leaching liquid, and hard rock dump leaching is performed with spraying leached, and 4, a part of the hard rock leaching liquid enters the thickener to remove iron, a part of the hard rock leaching liquid is mixed with the low-copper raffinate, and hard rock dump leaching is performed with spraying leached.

The invention discloses a method for enriching copper from a copper smelting waste acid stock solution, and belongs to the technical field of nonferrous metallurgy and environmental engineering. The method aims at solving the problems that in the prior art, copper and arsenic are not thoroughly separated, the copper resource recovery rate is low, and arsenic is cyclically accumulated in a system, and the method comprises the core steps that firstly, preliminary vulcanization is conducted, arsenic slag slurry is generated, then arsenic slag and fresh waste acid are subjected to a cyclic reaction, copper ions are selectively precipitated and enriched in the arsenic slag, and the arsenic slag is recycled. And finally, carrying out deep vulcanization on the separated liquid to obtain the low-copper arsenic slag. According to the method, complex activation equipment and accurate metering are not needed, operation is easy and convenient, copper resources can be efficiently recycled, arsenic is effectively removed, and high-value utilization of valuable metal in waste acid and cooperative control over environmental pollution are achieved.

This invention belongs to the field of waste gas treatment and discloses a tail gas purification device for antimony crystallization salt reaction of crude antimony alloy with low copper content. The device consists of an inlet pipe, a filter chamber, a blade cylinder, a transition pipe, and an exhaust pipe connected in sequence. In use, the invention achieves dynamic self-adaptation between the amount of reagent fed and the tail gas flow through the rotation of the spiral blades, effectively avoiding the waste of excessive reagent or insufficient reagent that leads to substandard purification. At the same time, the transmission component and the flow guiding component in the transition pipe cooperate to realize the continuous reciprocating non-fully closed opening and closing of the flow guiding plate. This not only creates continuous disturbance to the gas-pharmaceutical mixed airflow, greatly improving the mixing uniformity and ensuring that harmful components in the tail gas fully react with the reagent, but also regulates the airflow velocity and direction, avoiding component accumulation and corrosion caused by airflow deviation. This achieves self-adaptation and unattended operation in the waste gas treatment process, improving waste gas purification efficiency and device operation stability.