Scrap Copper Refining System Copper Cathode Production Line

With the rapid development of the economy, on the one hand, copper consumption has grown rapidly and copper prices have soared, and the output of copper concentrate is difficult to meet the demand; on the other hand, waste household appliances and waste electricity have also increased rapidly in recent years, causing environmental pollution. Therefore, the recycling of waste miscellaneous copper is a shortcut for the rapid development of industry to make up for the shortage of raw materials. For a long time, copper rod manufacturers in various countries have been trying to increase the proportion of scrap copper in raw materials. How to utilize waste copper and the production process of waste miscellaneous copper continuous casting and rolling low-oxygen bright copper rod using the refining process of red miscellaneous copper reverberatory furnace is an important research goal of technicians.

In order to achieve the above purpose, SUNY GROUP is mainly realized through the following technical solutions. The production process of the present invention is: waste miscellaneous copper-→reverberatory furnace smelting-→oxygen blowing-→refining-→reduction-→holding furnace refining-→casting-→rolling trimming-→rough rolling-→finish rolling-→cooling -→Arranging cables-→Discharging.

Copper Electrolytic Refining Process

Description of the production process

1. Scrap copper:

There are three grades of copper rod raw materials produced by scrap copper smelting. The first grade scrap copper is required to be composed of clean, non-tinned, uncoated and non-alloyed copper wires and cables. Be sure not to use Burnt wire, which consists of unalloyed copper wire with a nominal content of 96%. Secondary scrap copper is composed of small-diameter, uninsulated copper wires, copper pipes, copper busbars with varnish or insulation, and clean copper rods, with a minimum content of 94%. The third-grade scrap copper is a mixture of non-alloyed scrap copper, and its standard copper content is 92%. In order to obtain the best material combination and achieve the best effect, the composition ratio of the materials added to the furnace is generally: first-grade scrap Copper: 30%; Secondary scrap copper: 60%; Tertiary scrap copper: 10%.

2. Reverberatory furnace melting:

The key to the production of copper rods in scrap copper smelting is the control of the composition of copper liquid. The core equipment is the refining furnace. The refining furnace is made of refractory materials. The furnace can be tilted to facilitate degassing, deslagging and casting. The key point of the whole production line, its process includes: raw material-→feeding-→melting-→oxidation-→reduction-→casting. First of all, the ingredients should be made according to the source grade of scrap copper, and then the reactants should be added according to the ratio of raw materials. Scrap copper is refined once in the refining furnace to melt the copper quickly, then add deslagging agent to make the molten copper obtain the best uniformity, and then pass the oxygen-enriched air through the furnace to make the oxidized impurities float Surface cleaning in the molten pool. The main basic impurities in the refined copper are lead, tin, zinc, iron, arsenic, antimony and sulfur. These elements have a great influence on the processing technology and conductivity of copper rods. In this case, secondary refining is usually required to further remove impurities. The final reduction operation needs to feed reducing gas into the furnace to adjust the oxygen content of copper to the requirement of 200-350ppm.

3. Holding furnace refining:

Refining in the holding furnace makes the copper melt stand at high temperature, and the non-copper inclusions and the copper melt have different specific gravity, so they float or sink, so that the copper liquid can be further purified, and the chemical composition of the copper wire billet can be guaranteed to meet the standard. Require.

4. Casting:

Casting adopts five-wheel steel belt continuous casting machine. The five-wheel steel belt continuous casting machine is composed of crystal wheel, two pressure wheels, tension wheel, idler wheel and steel belt. The groove and pressing on the crystal wheel The steel belt forms the pouring cavity for the copper liquid, and the casting wheel and the steel belt are equipped with a cooling system, a purging system, a carbon spraying system and a ladle preheating device.

5. Rolling edge:

The pretreatment of the slab includes pinching, shearing, and edge milling. The slab exported from the continuous casting machine is sent to the cutting head of the shearing machine by the pinch roller or the unqualified products are cut off, and then the edge is removed by milling.

6. Rough rolling and finishing rolling:

The copper rod tandem rolling mill is a two-roller cantilever rolling mill, which is divided into two sets of rough rolling and finishing rolling. The rolls of rough rolling and finish rolling are arranged alternately, horizontally and vertically. The rough rolling mill adopts a large amount of reduction under a large pressure to refine the grain. Finish rolling to ensure the dimensional accuracy and surface finish of the copper rod.

7 cooling:

The copper rod exiting the continuous rolling mill enters a cooling pipe about 20 meters long and slopes upwards. In the cooling pipe, the copper rod is cooled by a slightly acidic alcohol solution, cleaned and descaled to avoid re-oxidation.

8. Cable arrangement and output:

After cooling and cleaning, the copper rod is changed from the horizontal position of the rolling line to the vertical position of the winding machine by the curved roller table, and then enters the post-processing device of the copper rod and the winding machine. The copper rod is wound into a spiral shape in the rod winding machine according to the user's requirements and packed into the warehouse.