The issue of lead slag recycling
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After leaching with zinc suboxide sulfate, the leaching residue contains a relatively high amount of lead sulfate slag. Question: How can this lead sulfate slag be utilized? How to obtain metallic lead?
There are many small blast furnaces in Hunan Province used to process this kind of lead slag; does the poster have it in stock?
It's in stock. It’s mainly intended for my own use.
Converting it to lead carbonate makes it easier to handle
Reply to 4# laomao123: The main component is metallic lead.
Reply to 1# chengjchyxl: Re-selection can be considered; a shaking table and spiral chute can be used for grinding the slag and carrying out re-selection.
Lead slag cannot mainly consist of metallic lead; its main component is lead sulfate. The conventional method currently used is to feed iron filings and limestone into a small blast furnace for reduction and smelting to produce metallic lead, but the direct yield is not high, generally around 70 percent. For some individuals, pre-sintering for desulfurization followed by melting in a blast furnace results in a relatively higher direct yield, but at the cost of environmental protection.
Sodium hydroxide leaching, followed by electrolysis, yields lead peroxide and metallic lead.
This post was last edited by laomao123 on 2010-8-22 at 17:29; the main issue is the severe environmental pollution caused by the decomposition of lead sulfate
This post was last edited and replied to by laomao123 on 2010-8-22 at 18:58. Reply 5# chengjchyxl: Is there something wrong with my eyes? You said it was lead sulfate yourself, but then you replied that it was metallic lead – is metallic lead what results from leaching with sulfuric acid?
Reply 10# laomao123: It was a mistake on my part; I mainly wanted to obtain metallic lead