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Method for producing artificial rich iron ore from nickel smelting waste slag by utilizing new sintering process

A craft and man-made technology, applied in the field of artificial rich iron ore for ironmaking, can solve the problems of poor economic indicators, poor economic benefits, high processing costs, etc., and achieve the effects of low production cost, energy saving, and good anti-knock performance

Inactive Publication Date: 2010-09-15
牛庆君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, the processing costs of these technologies are generally too high, resulting in poor economic benefits. Especially in terms of energy saving and consumption reduction, various economic indicators are very poor, so these technologies are rarely used so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a. Pour the nickel smelting waste slag at 1200°C into the hot slag bag, shake the bag for 10 minutes and then let it stand for 15 minutes;

[0024] b. Remove the floating slag part of the uppermost layer of the hot slag bag accounting for 5% of the total volume of the discarded slag, keep the bottom slag part of the bottom layer of the hot slag bag accounting for 5% of the total volume of the discarded slag, and transfer the rest of the hot slag bag to another in hot slag bag;

[0025] c. Add iron concentrate powder with an iron content of 62% in the above-mentioned hot slag bag containing most of the waste slag. The consumption of iron fine powder is 50% of the total weight of the waste slag in the hot slag bag, and then stir evenly. Make the iron fine powder evenly melt in the waste slag;

[0026] d. Pour the waste slag with iron concentrate powder into the mold to cool, then crush, sieve, and finish it to be used as a qualified artificial iron-rich ore.

[0027] In...

Embodiment 2

[0029] a. Pour the nickel smelting waste slag at a temperature of 1100°C into the hot slag bag, shake the bag for 5 minutes and then let it stand for 10 minutes;

[0030] b. Remove the floating slag part of the uppermost layer of the hot slag bag accounting for 3% of the total volume of the discarded slag, keep the bottom slag part of the bottom layer of the hot slag bag accounting for 3% of the total volume of the discarded slag, and transfer the rest of the hot slag bag to another in hot slag bag;

[0031] c. Add iron oxide scales with an iron content of 60% to the above hot slag bag containing most of the waste slag. The amount of iron oxide scale is 30% of the total weight of the waste slag in the hot slag bag. The iron sheet is evenly melted in the waste slag;

[0032] d. The waste slag added with iron scale is then cooled by a cast iron machine, and then crushed, screened, and finished to be used as a qualified artificial iron-rich ore.

[0033] Iron oxide scale is use...

Embodiment 3

[0035] a. Pour the nickel smelting waste slag at a temperature of 1300°C into the hot slag bag, shake the bag for 15 minutes and then let it stand for 20 minutes;

[0036] b. Remove the floating slag part of the uppermost layer of the hot slag bag accounting for 8% of the total volume of the discarded slag, keep the bottom slag part of the bottom layer of the hot slag bag accounting for 8% of the total volume of the discarded slag, and transfer the rest of the hot slag bag to another in hot slag bag;

[0037] c. Add iron-rich ore powder with an iron content of 65% in the above-mentioned hot slag bag containing most of the waste slag. The amount of iron-rich ore powder is 100% of the total weight of the waste slag in the hot slag bag, and then stir Evenly, so that the iron-rich ore powder is evenly melted in the waste slag;

[0038] d. The waste slag added with iron-rich ore powder is cooled with an iron casting machine, and then crushed, screened, and finished to be used as a...

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PUM

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Abstract

The invention relates to a method for producing artificial rich iron ore for ironmaking from nickel smelting waste slag, in particular to a method for producing artificial rich iron ore from nickel smelting waste slag by utilizing a new sintering process. The method is characterized by comprising the following steps: a, pouring nickel smelting waste slag at 1100-1300 DEG C into a hot slag bag, shaking the bag for 5-15 minutes, and standing for 10-20 minutes; b, transferring the rest of the waste slag in the hot slag bag into another hot slag bag; c, adding a ferrous raw material into the hot slag bag filled with most of the waste slag, wherein the ferrous raw material accounts for 30-100 wt% of the waste slag in the hot slag bag; and d, pouring out the waste slag added with the ferrous raw material, and cooling. By fully utilizing the sensible heat produced by the emission of the nickel smelting waste slag, the method removes the impurities to purify the waste slag, recycles the ferrous metals and saves the heat energy, thereby obtaining the novel artificial rich iron ore product.

Description

technical field [0001] The invention relates to a method for producing artificial iron-rich ore for ironmaking by using nickel smelting waste slag, in particular to a method for producing artificial rich iron ore by using nickel smelting waste slag through a new sintering process. Background technique [0002] Nickel smelting waste slag is a kind of solid waste discharged from nickel metal smelting production in non-ferrous metallurgical enterprises, and it is a unique iron and steel resource. Nickel smelting waste slag contains not only a large amount of iron metal (about 34%-45%), silicon dioxide, calcium oxide, magnesium oxide, but also a small amount of nickel, copper, cobalt, lead, zinc and other metals and non-metallic elements such as sulfur etc. At present, except for a small amount of nickel smelting waste slag, which is used as an additive to replace iron ore in cement plants, the rest has not been fully developed and utilized. In addition, when pyro-process nicke...

Claims

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Application Information

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IPC IPC(8): C22B7/04
CPCY02P10/20
Inventor 牛庆君
Owner 牛庆君
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