SU986947A1 - Charge for reprocessing wastes of lead storage battery production - Google Patents

Description

(5) CHARGE DISPOSAL CONSIGNMENT

PRODUCTION OF LEAD ACCUMULATORS

The invention relates to non-ferrous metallurgy and can be used in the recycling of waste production of lead-acid batteries, as well as in the processing of scrap lead-acid batteries. The known charge for processing waste from the production of lead-acid batteries, containing production waste (rejected plates), charcoal in an amount based on the weight of the plates and an elus from equal amounts of KC1 and N32.005 1. The disadvantage of this mixture is the low yield of lead, amounting to 85-90%. The closest to the technical essence and the achieved result to the proposed is the charge 2 J for processing waste from the production of lead batteries having the following composition, weight: Coal5.2 Soda5.2 Quartz sand Lime1.3 Rechargeable scrap 86.6 The disadvantage is known The charge is a high lead content in the slag and an intense wear on the lining of the smelting furnace. In the smelting process, free silica contained in an amount of up to 97.7% in quartz sand interacts with the components of the charge and with a refractory lining to form sodium, magnesium, calcium silicates, resulting in wear of the lining of the melting furnace. -. The purpose of the invention is to reduce the loss of lead with slag and reduce the rate of dissolution of the chromo-magnesite lining during the smelting process. The goal is achieved by the fact that the charge for processing waste

lead batteries, soda, silica-containing material, lime, carbon-containing reductant and battery wastes, as silica-containing material contains feldspar sand, and coke as carbon-containing reductant in the following ratio, wt.%: Soda3-5

Coke-6

Lime 0.3-1.0 feldspar

sand1-1,5

Waste from the production of batteries. The feldspar sand contains aluminosilicates of the type Na2 OiAl2.n36SiO, K2 0Al2 0,, 6S10, j, and CaOACO. 6SI02. with a melting point of 11 70-1550 0, the composition of the minerals of feldspar sand can contain up to 17% of potassium oxide or 11.5% of sodium oxide, which, like soda, have a positive effect on lead extraction. The relatively low melting point of feldspar sand contributes to the formation of liquid slag and good separation of the smelting products. In addition, DA

feldspar sand consists of formed aluminosilicates that do not require components (aluminum oxides, potassium, magnesium) from the lining to form them, which helps reduce its dissolution rate 55.

In order to test the proposed fir, the waste from the production of batteries to the composition, containing,%: lead 87.6; antimony 3.7; sulfur 2.7, 4o

1.0 1.0 1.5 1.5

.

feldspar composition.

69.2; eleven,; 7.1; 2.3; CaO, 9; MgQ 1.7; FfVi.O.j, 2,6, technical soda, coke with a particle size of 5 mm.

Chips with different content of components are prepared by mixing starting materials at the rate of obtaining a sample of 100 g for each composition. The charge is loaded into a corundum crucible, which is placed in electric power for 60 minutes. After this period, the crucible is removed from the furnace, cooled in air, the smelting products are separated and analyzed for lead content. Slags obtained by smelting various compositions of the charge are melted again in corundum crucibles in an electric furnace at 120 ° C.

They are placed samples of chrome magnesite brick, made in the form of cylinders with a diameter of 14 mm, which is subjected to rotation at a speed of r / min for one hour.

Then the refractory samples are removed from slags, which after cooling are analyzed for their content of oxide). By the amount of magnesium oxide that has passed into the slag from the sample of the chromomagnropro solution.

The table shows the test results of the charge of different composition.

As follows from the table, the use of the described mixture can reduce the loss of lead from the slag to 0.120, 5, and one and a half times lower the dissolution rate of the chromo-magnesite lining.

66 39 33 35 sieve bricks, determine the speed

Claims (1)

Claim Charge for processing waste lead accumulators manufacture, comprising soda, silica-material, lime, a carbonaceous reductant and waste proiz- duction accumulators _45, characterized in that, to reduce the loss of lead from the slag and reduce the dissolution rate hromomagnezitovoy lining during melting of the charge, it contains feldspar sand as a silica-containing material, and coke as a carbon-containing reducing agent in the following ratio of components, wt.%: VNIIIPI Order 10214/3 3-5 44 about, 3-1, about 1.0-1.5 Rest Soda Coke Lime Feldspar Sand Battery Waste