4results about "Red lead" patented technology

This invention relates to a method for preparing monocrystalline lead oxide from waste lead paste using a low-temperature pyrometallurgical process, belonging to the field of resource recycling technology for waste lead-acid batteries. The invention involves removing waste positive and negative electrode plates from lead-acid batteries and washing them with water; peeling waste lead paste from the grids of the waste positive and negative electrode plates, grinding and sieving to obtain waste lead paste powder; mixing the waste lead paste powder with a desulfurizing agent, a desulfurization aid, and a crystal form control agent to obtain mixture A; calcining mixture A at 400-600℃ for 2-8 hours, followed by furnace cooling to obtain mixture B; washing and drying mixture B to obtain monocrystalline lead oxide, which is α-PbO, β-PbO, or Pb3O4. This invention directly uses waste lead paste from lead-acid batteries for a one-step low-temperature pyrometallurgical process to prepare monocrystalline lead oxide. The desulfurizing agent can directly desulfurize the waste lead paste, the desulfurization aid can lower the calcination temperature, and the crystal form control agent regulates the crystal structure of the generated lead oxide species, resulting in monocrystalline lead oxide with high purity and good crystallinity.

The application discloses a red lead semi-finished product integrated energy-saving preparation device, and belongs to the technical field of red lead preparation devices, which comprises a bin body, a horizontally arranged partition plate is arranged in the bin body, the bin body is divided into an oxidation cavity and a lead melting cavity by the partition plate, the oxidation cavity is arranged above the lead melting cavity, a powder outlet pipe is arranged on the top of the oxidation cavity, an air blower is arranged on the outer wall of the oxidation cavity, the air outlet of the air blower is communicated with the oxidation cavity, a liquid outlet is arranged on the partition plate and is communicated with the oxidation cavity and the lead melting cavity, two processes of red lead production are integrated, the red lead production process is reduced, and the labor is reduced, the production efficiency of products can be greatly improved, the occurrence of occupational hazards can be reduced by automatic conveying, the structure of the application is simpler, more reasonable and more scientific than that of a traditional red lead production device, and therefore the investment cost of equipment in the red lead production field is reduced.

The utility model relates to secondary oxidation equipment for yellow lead, which comprises an oxidation furnace, the oxidation furnace comprises a horizontally arranged oxidation furnace body and a conveying roller arranged in the oxidation furnace body, and one end of the conveying roller is connected with an output shaft of a driving motor; a resistance wire, refractory bricks and heat preservation cotton are sequentially arranged on the outer side of the oxidizing furnace body from inside to outside, a feeding port and an air inlet are formed in the upper portion of the end, away from the driving motor, of the oxidizing furnace body, an exhaust port is formed in the upper portion of the end, close to the driving motor, of the oxidizing furnace body, and a discharging port is formed in the lower portion of the end. According to the secondary oxidation equipment for the yellow lead, the yellow lead powder is conveyed in the horizontal oxidation furnace body through the conveying rollers, meanwhile, the oxidation furnace body is heated through the resistance wire, fresh air is introduced through the air inlet, the secondary oxidation effect is good, and the oxidation efficiency is high. Refractory bricks and heat preservation cotton are arranged outside the resistance wires for heat preservation, and heat loss is reduced.

A composition is provided comprising one or more of alpha lead oxide, beta lead oxide, metallic lead. Pb2O3 and Pb3O4, the composition comprising particles comprising sub-particles, the sub-particles having a mean greatest dimension of from 10 to 300 nm. Methods of making such a composition are also described.