Ingredients for fire refining of scrap copper and smelting method

A technology for pyrorefining and scrap copper, applied in the field of scrap copper smelting, can solve problems such as the vacancy of batching and feeding technology, shorten the smelting cycle of scrap copper, etc., and achieve the effect of shortening the smelting cycle and improving the life of metallurgical furnaces.

Inactive Publication Date: 2013-12-18
NANTONG REPAIR AIR CHEM BIOENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a batching and smelting method of waste miscellaneous copper pyro-refining, which can solve the problem of lack of batching and feeding technology in the actual high-grade waste miscellaneous copper refining process, improve the life of metallurgical furnaces, and shorten the waste miscellaneous copper smelting cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, a tilting furnace with a capacity of 350t is selected. Before feeding, firstly pack the copper scraps larger than 50mm in the shape of tubes, strips, blocks, and irregular shapes into cuboids, while the lengths of copper scraps in the shape of tubes, strips, blocks, and irregular shapes or wires less than 50 mm, The copper rice raw material is loaded with a loading hopper, and the large piece of bottom-coated copper is cut until it can be added to the hearth of the metallurgical furnace. The bottom-coated copper is the copper block deposited on the bottom of the slag bag after the metallurgical furnace removes slag.

[0024] The raw and auxiliary materials of waste miscellaneous copper are prepared according to 120t of packing material, 95t of thick copper block, 97t of bottom copper, 20t of waste anode plate, 15t of bulk material, 7t of quartz, 4t of pig iron, and 2t of lime. The total amount of charge into the furnace is 360t.

[0025] After the ra...

Embodiment 2

[0033] The difference between this embodiment and Embodiment 1 is that the waste miscellaneous copper raw and auxiliary materials are packed according to 180t of packing material, 52t of thick copper block, 72t of bottom copper, 13t of electrolytic residual anode, 13t of bulk material, 7t of quartz, 2t of pig iron, and 1t of lime After matching, the total amount of charge into the furnace is 340t.

[0034] After the raw and auxiliary materials are prepared, feed them in the following order:

[0035] (1) Put the bulk material into the hopper first, and spread 13t of bulk copper scrap to the bottom of the metallurgical furnace, and heat the material to a softened state;

[0036] (2) After putting in 128t of bulk packing material and 52t of blister copper block, put in 1t of lime and 2t of quartz, and heat the materials to a softened state;

[0037] (3) Add 72t of bottom copper to heat the material to a softened state;

[0038] (4) Put in the remaining 52t of bulk packing mater...

Embodiment 3

[0042] The difference between this embodiment and Embodiment 1 and Embodiment 2 is that a tilting furnace with a capacity of 250t is selected.

[0043] The waste and miscellaneous copper raw and auxiliary materials are packed according to block shape 205t, bottom copper 44.6t, electrolytic residual anode plate 6.5t, bulk material 3.9t, quartz 6t, pig iron 2t, lime 2t, and the total amount of furnace charge is 270t.

[0044] After the raw and auxiliary materials are prepared, feed them in the following order:

[0045] (1) Put 3.9 tons of bulk material into the hopper first, spread the bulk scrap copper material on the bottom of the metallurgical furnace, and heat the material to a softened state;

[0046] (2) After putting in 150t of block packing materials, put in 2t of lime and 2t of quartz, and heat the materials to a softened state;

[0047] (3) Add 44.6t of bottom copper to heat the material to a softened state;

[0048] (4) Put in the remaining 55t of block packing mate...

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PUM

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Abstract

The invention provides ingredients for fire refining of scrap copper and a smelting method. The ingredients include 96-97.5% by mass of raw materials and 2.5-4% by mass of auxiliary materials, wherein the raw materials include 59-79% of lump scrap copper baling materials or/and blister copper lumps, 17-29.6% of bottoming copper, 2.5-5.8% of a waste anode plate or/and an electrolytic residual anode plate and 2.5-5.6% of bulk materials; the auxiliary materials include quartz, pig iron and lime which are in the ratio of (2:8): (0.5-1): (0.5-1). For feeding, the bulk materials are fed at first, and then 60-90% of lump scrap copper baling materials or/and blister copper lumps, the lime and 25-50% of quartz are fed; next, the bottoming copper and the left 10-40% of lump scrap copper baling materials or/and blister copper lumps are fed; after the materials are molten in a furnace, the pig iron and the left 50-75% of quartz are fed to begin the stage of oxidization; finally, the waste anode plate or/and electrolytic residual anode plate is/are added. The ingredients provided by the invention fill a vacancy in the burdening and feeding techniques in the existing high-grade scrap copper refining process; and as a result, the service life of a metallurgical furnace is prolonged and the smelting period of the scrap copper is shortened.

Description

technical field [0001] The invention relates to the technical field of waste miscellaneous copper smelting, in particular to a batching and smelting method of waste miscellaneous copper pyro-refining. Background technique [0002] During pyro-refining of high-grade miscellaneous copper scrap (referring to copper content above 90%), the rationality of scrap copper, additive ingredients and feeding process is directly related to the smelting cycle of waste miscellaneous copper and the life of the metallurgical furnace. However, due to the different sources of scrap copper, the chemical composition and physical specifications are different, so the raw and auxiliary material ingredients and feeding technology of the existing copper smelting process are not suitable for scrap copper smelting. How to find a stable and reasonable scrap copper ingredient , The feeding process has always been a difficult problem in this industry. Even if some manufacturers have carried out research ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/14
Inventor 钟文华邹铁梅
Owner NANTONG REPAIR AIR CHEM BIOENG
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