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A ferronickel, high-quality technology, applied in the field of ferronickel, can solve the problems of large amount of slag, high energy consumption, and low grade
Inactive Publication Date: 2013-12-11
JIANGSU UNIV
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[0003] In the pyrotechnics, the current main methods are blast furnace method, rotary kiln pre-reduction + submerged arc furnace method and pre-reduction + electric furnace melting method; among them, the ferronickel produced by blast furnace method has low nickel grade and impurity elements. Problems such as high content of P, S, C and Si and large amount of slag are basically no longer used; rotary kiln pre-reduction + submerged arc furnace method is currently the main method for producing ferronickel, but this method has high energy consumption and serious pollution And problems such as high content of impurity elements in ferronickel, pre-reduction + electric furnace melting method is the future development direction of ferronickel production technology
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Embodiment 1
[0017] The laterite nickel ore powder (2.25wt%Ni, particle size -200 mesh greater than 80%), clean coal powder (fixed carbon 90.2wt%, S0.13%wt, ash content 8%wt, volatile content 1.6%wt, particle size - The proportion of 200 mesh is greater than 70%) and lime powder (CaO67.2wt%, S0.006wt%, P0.003wt%, particle size -200 mesh is greater than 50%) according to the proportion of 85:10:5, weighing, and adding continuously Mix and grind in a moist mill, the raw materials are mixed in a moist mill for 60 minutes, the ratio of material to ball is 10:1.
[0018] Put the mixed raw materials into the sand mixer and then mix them mechanically. At the same time, add 2wt% bentonite, 2wt% syrup binder and 4wt% water to mix and wet the raw materials. The overall moisture content of the raw materials should be controlled at ≤9wt %; Afterwards, the wet material is continuously added to the double-roller briquetting machine and pressed into elliptical cold-consolidated pellets with a length of 2...
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Abstract
The invention relates to ferronickel, and particularly relates to a method for producing high quality ferronickel. According to the method, red soil nickel mineral powder, refined coal dust and lime powder are taken as the main raw materials, and the high quality ferronickel is prepared through a series of steps of burdening, weighing, mixing, adding adhesive, pressing into pellets, drying, sieving, pre-reducing in a rotary hearth furnace, cooling metallized pellets, crushing, ball milling, magnetic separating, briqutting, smelting in an electric-arc furnace, slagging and dephosphorizing, desulfurizing and pouring. The detection shows that the ferronickel comprises 20-30wt% of Ni, 0.2-0.5wt% of C, less than or equal to 0.015wt% of S, less than or equal to 0.03wt% of P, and less than or equal to 0.3wt% of Si, thus being the high quality raw material for producing stainless steel, wear-resistant steel and heat-resisting cast iron.
Description
technical field [0001] The invention relates to ferronickel, in particular to a method for producing high-quality ferronickel. Background technique [0002] Ferronickel is an important raw material for the production of stainless steel, heat-resistant cast steel, heat-resistant cast iron, wear-resistant steel and structural steel. The production process of ferronickel is divided into two categories: wet method and pyrotechnic method. Among them, the pyrotechnic method is the main method for smelting ferronickel. [0003] In the pyrotechnics, the current main methods are blast furnace method, rotary kiln pre-reduction + submerged arc furnace method and pre-reduction + electric furnace melting method; among them, the ferronickel produced by blast furnace method has low nickel grade and impurity elements. Problems such as high content of P, S, C and Si and large amount of slag are basically no longer used; rotary kiln pre-reduction + submerged arc furnace method is currently t...
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