Lead residue reducing agent and preparation method thereof

Abstract

The invention discloses a lead residue reducing agent and a preparation method thereof and belongs to the technical field of chemical industry. The lead residue reducing agent comprises the following components in percentage by weight: 30 to 70 percent of active carbon, 5 to 20 percent of sodium sulfate, 5 to 15 percent of sodium hypophosphite, 1 to 15 percent of sodium hexafluoroaluminate, 3 to 18 percent of calcium oxide, 7 to 20 percent of precipitated silica, 1 to 5 percent of aluminium oxide, 1 to 5 percent of magnesium chloride, 0.1 to 2 percent of titanium trichloride and 0.5 to 5 percent of triethyl aluminum. The lead residue reducing agent can directly reduce oxide-state scum produced during alloy preparation of lead, calcium, tin and aluminum alloys and casting of grids of storage batteries into metal-state residue, so the residue amount of the lead, calcium, tin and aluminum alloys is reduced obviously. When the agent is used, the lead residue produced during the preparation of the lead, calcium, tin and aluminum alloys and the casting of grids can be directly reduced into molten metals of lead, calcium, tin and aluminum to flow back to an alloy pot, so the lead residueis reduced while the lead, calcium, tin and aluminum in the designated alloys are hardly lost; and thus, the effective ingredients of the grid alloys of the storage batteries are ensured.

Description

technical field [0001] The invention relates to a preparation technology of a lead slag reducing agent, in particular to a lead slag reducing agent used in the smelting of lead-calcium-tin-aluminum alloys and the casting of storage battery grids and a preparation method thereof. Background technique [0002] In recent years, with the rapid growth of my country's electric bicycles, automobiles, telecommunications and export UPS batteries, sealed lead-acid batteries have achieved rapid development, making my country the world's largest producer of lead, lead-acid battery production, and export of lead and lead-acid batteries and lead consuming countries. Lead, as one of the five heavy metals under the key control of the country during the 12th Five-Year Plan, has attracted great attention from the State Council. Since February 2011, the Ministry of Environmental Protection has begun to conduct blanket inspections on lead-acid battery companies, because lead-acid battery product...

AI Technical Summary

Problems solved by technology

The 102,000 tons of waste lead slag was purchased by some small recycled lead factories in Hebei Baoding, Anhui Jieshou, Zhejiang Changxing, Southwest Chongqing, Guangdong North and other regions, which are currently domestic waste lead-acid battery regeneration distribution centers. Earth kiln smelting processes such as reverberatory furnaces, blast furnaces, and cupolas, and mixing with plates without any desulfurization treatment, the comprehensive recycling rate is extremely low, and the rest of the lead is collected in the form of gas or dust in the smelting process. The sulfur dioxide produced enters the air together. Based on the output of about 100,000 tons of recycled lead, the annual emission of sulfur dioxide is about 12,250 tons, and a large amount of waste residue containing heavy metals such as lead, arsenic, cadmium, and antimony is produced, causing serious waste of resources and ecological environment. Huge pollution, even causing lead poisoning incidents of local residents occurred from time to time

Images