In the smelting of stainless steel, the source of nickel metal at present there are three main sources: nickel pig iron, pure nickel, as well as stainless steel scrap. Steel mills according to the different period, the raw material price fluctuations, ratio of different ways to produce, in order to obtain maximum profits. This article will focus on to discuss the current period, all kinds of stainless steel raw material proportioning ways production cost comparison.
A, high nickel iron and nickel plate cost comparison
High nickel cast iron compared with pure nickel, the advantage is mainly reflected in its can provide steelmaking pig iron. The current steelmaking pig iron price is 2530 yuan/ton, high nickel cast iron grade of 12%, for example, the current price is RMB 1380 / nickel in jiangsu region. For the high nickel iron, nickel each point is given the value of the pig iron for steel making is RMB 181. That is to say, high nickel pig iron price is larger than the size of nickel plate within 181 yuan/nickel, high nickel cast iron is still has a cost advantage. In terms of the current situation, the Yangtze river spot nickel price is 126400 yuan/ton, the price is RMB 116 / nickel, less than 181 yuan. So for smelting stainless steel raw materials, high nickel iron compared with nickel plate more cost advantage.
Second, scrap stainless steel and high nickel pig iron cost comparison
Relative to the high nickel cast iron, stainless steel scrap its nickel metal, not only more chrome metal. Stainless steel scrap is as follows: the main ingredients in nickel metal mass fraction is 8%, chromium metal mass fraction is 17%, iron mass fraction is 73%, other mass fraction of 2%. For the nickel metal scrap in June scrap steel taigang bidding price 13900 yuan/tons, in June of taiyuan iron and steel high carbon ferrochrome bidding price of 6350 yuan/tons, 50 minus the ferrochrome in the scrap value of 2159 yuan, the convert scrap value of 11741 yuan, 8% of the nickel iron in scrap nickel iron nickel single point in price is RMB 1468 / nickel, and the jiangsu region 12% high nickel/nickel pig iron 1380 yuan, in comparison, at this stage, high nickel cast iron does not have the advantage of scrap steel.
The lack of stainless steel scrap resources in China, and the high energy consumption of the scrap steel smelting, and the bad quality of scrap steel into the molten steel and harmful elements such as reason, in the case of scrap steel price advantage is not enough to attract, generally do not take the mode of production of stainless steel scrap. Based on 51 BXG industry research center statistics, in the smelting of stainless steel, stainless steel scrap 60% raw material has been close to online, for the stainless steel scrap of the whole society to use near the proportion is about 18% on average.
Three, low nickel pig iron + model of pure nickel
For low nickel pig iron and pure nickel, assume that low nickel pig iron (1.6%) + the pattern of pure nickel is equipped with a high nickel cast iron (12%) of the same composition, so need 0.8943 tonnes of low nickel iron, pure nickel 0.1057 tons. The shandong market low nickel iron price is 3400 yuan/ton, the Yangtze river spot nickel price is 126400 yuan/ton, so if in this way comparison, 12% of nickel pig iron price is 16401.1 yuan, the equivalent of 1366.8 yuan/nickel. Now, 12% of high nickel iron nickel price is 1380 yuan /, the comparative advantage is not obvious.
Four pure nickel, nickel iron + model
For nickel and iron in the pure nickel production mode, assuming that “nickel and iron in the pure nickel pig iron (5%) +” pattern, equipped with a high nickel cast iron (12%) of the same composition, so need to 0.926 tons, nickel iron in pure nickel 0.074 tons. Nickel iron tax in the current price is 1340 yuan/nickel, changjiang spot nickel price is 126400 yuan/ton, so if the ratio in this way, 12% nickel pig iron price is 15557.8 yuan, the equivalent of 1296.5 yuan/nickel. , by contrast, nickel iron + high pure nickel production mode nickel iron production pattern has great advantage, low single nickel points of 84 yuan.
Discussion of the above several kinds of stainless steel raw material proportioning patterns, not only to the steel mill control has a certain guiding significance to the production cost, and can be based on different period, all kinds of raw material price difference, or how different, how to judge the rise and fall behind the trend.