3 results about "Low copper" patented technology

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.

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.