What Is Involved in Smelting Ore?

Smelting is a refining technology, which refers to the extraction of metals from ores by roasting, smelting, electrolysis, and the use of chemical agents; reducing impurities contained in metals or increasing certain components in metals to refining the required metals .

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In the first quarter, China's non-ferrous metal materials purchase price index showed a downward trend as a whole, from 98.5 in January to 96.3 in March. Under the dual effect of falling prices but some recovery in terminal demand, the year-on-year growth rate of China's non-ferrous metal product sales revenue has diverged. Among them, the sales revenue of nonferrous metal ore mining and dressing products increased by 14.91% year-on-year, a growth rate of 11.37 percentage points lower than the same period last year; the sales revenue of non-ferrous metal smelting and rolling processing industry products increased by 18.01% year-on-year, an increase of 3.68 year-on-year. Percentage points.

Smelting into

Analytical instrument application guide, those who are engaged in the application of automated instruments have a deep understanding. Especially in the non-ferrous smelting industry, there are many difficulties and problems in process analysis: high temperature, high dust, high moisture, negative pressure, crystallization, corrosive and other harsh gas conditions; the effectiveness of the pretreatment device is poor; the process and pretreatment And lag caused by analyzers and other links; high requirements for protection from dust, splashes, corrosion, high temperature, etc .; higher degree of automation and less maintenance workload, etc. These have brought a lot of difficulties to the application of process component analysis and environmental monitoring and analysis instruments (systems).

The selection of analytical instrument (system) is the key to successful application. Improper selection will cause the instrument to fail to operate normally or increase the difficulty of maintenance. Many companies have encountered situations where the meter is not easy to use or even use due to improper selection, so the following points should be paid attention to when selecting:

Smelt abroad

For a long time, in consideration of copper resources and cost, copper rod manufacturers in various countries have always wanted to use as much copper as possible as a raw material in modern continuous casting and rolling production lines. In fact, until the 1980s, the amount of pure copper scrap used by producers was always limited to 10-15%. Because the production of high-quality, low-oxygen bright copper rods with all-waste copper at that time was a very costly measure, for this reason, copper must be melted and refined to obtain anode copper, and then cathode copper was obtained by electrolytic methods. Until the early 1980s, two companies in Barcelona, Spain, and Milan, Italy, studied how to use low-oxygen bright copper rods from all scrap copper. With the joint efforts, the two companies successfully each within two years of their initial contact. Reached the goal. In 1986, the first European continuous casting and rolling production line with 100% copper scrap started operation, and the investment in the project was repaid in a short period of time. However, the production line of copper rods originally produced from scrap copper has a nominal capacity of 7 tons / hour. It can produce 50 tons of copper rods per day (calculated for 8 hours). After repeated transformations, it was launched in 1995. In the continuous rolling production line, the melting capacity of the shaft furnace has been increased to 10 tons / hour, and the production capacity has been increased to 80 tons / 8 hours. If equipment maintenance, maintenance and holidays are removed, the annual output can reach at least 60,000 tons. The conductivity and other indicators of copper rod performance produced by this production line meet the requirements of ISO standards. The price of raw materials can save 8% to 15%, and each ton of copper rod can be cheaper 250-270 yuan.

Smelting domestic smelting

The development of China's scrap copper continuous casting and rolling production line was about the early 1990s.