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Ore smelting method with steel slag tailings as supporting frame

A technology of support frame and tailings, which is applied in the field of ore smelting, can solve problems such as restricting large-scale application and building stress damage, and achieve the effects of improving fluidity, stabilizing furnace conditions and high mechanical strength

Inactive Publication Date: 2021-10-29
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Steel slag tailings will expand and crack due to high free calcium in contact with water, which will cause potential stress damage to buildings, thus restricting large-scale applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An ore smelting method using steel slag tailings as a support frame, comprising the following steps:

[0025] (1) placing the liquid steel slag in the hot stuffing pool, and pumping water therein to generate water vapor for pumping water and hot stuffing, and treating it for 40 hours, and ensuring that the final product obtained is still liquid steel slag;

[0026] (2) Add a mixture of lithium oxide, fluorine and sodium oxide to the liquid steel slag treated in step (1), keep it in a liquid state for 20 hours after stirring and mixing; the weight of the mixture is 1.2% of the weight of the liquid steel slag; in the mixture The weight ratio of lithium oxide, fluorine and sodium oxide is 1:2:0.5;

[0027] (3) Cool the liquid steel slag treated in step (2), then sieve to obtain steel slag tailings with a particle size of 10-100 mm, and conduct magnetic separation at 2200 Gauss; After mixing at a weight ratio of 2:1, it can be smelted in a closed blower.

Embodiment 2

[0029] An ore smelting method using steel slag tailings as a support frame, comprising the following steps:

[0030] (1) placing the liquid steel slag in the hot stuffing pool, and pumping water therein to generate water vapor for pumping water and hot stuffing, and treating it for 30 hours, and ensuring that the final product obtained is still liquid steel slag;

[0031] (2) Add a mixture of lithium oxide, fluorine and sodium oxide to the liquid steel slag treated in step (1), keep it in a liquid state for 20 hours after stirring and mixing; the weight of the mixture is 0.5% of the weight of the liquid steel slag; in the mixture The weight ratio of lithium oxide, fluorine and sodium oxide is 0.5:1.5:0.5;

[0032] (3) Cool the liquid steel slag treated in step (2), then sieve to obtain steel slag tailings with a particle size of 10-100mm, and conduct magnetic separation at 2000 Gauss, and then separate the separated steel slag tailings with ore After mixing at a weight ratio ...

Embodiment 3

[0034] An ore smelting method using steel slag tailings as a support frame, comprising the following steps:

[0035] (1) placing the liquid steel slag in the hot stuffing pool, and pumping water therein to generate water vapor for pumping water and hot stuffing, and treating it for 50 hours, and ensuring that the final product obtained is still liquid steel slag;

[0036] (2) Add a mixture of lithium oxide, fluorine and sodium oxide to the liquid steel slag treated in step (1), keep it in a liquid state for 30 hours after stirring and mixing; the weight of the mixture is 1.5% of the weight of the liquid steel slag; in the mixture The weight ratio of lithium oxide, fluorine and sodium oxide is 1:2:1;

[0037] (3) Cool the liquid steel slag treated in step (2), and then sieve to obtain steel slag tailings with a particle size of 10-100 mm, and conduct magnetic separation at 3000 Gauss, and then separate the separated steel slag tailings with ore After mixing at a weight ratio o...

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Abstract

The invention discloses an ore smelting method with steel slag tailings as a supporting frame. The ore smelting method comprises the following steps that (1), liquid steel slag is put in a hot disintegration pool, water is added into the hot disintegration pool to generate water vapor, water-adding hot disintegration is conducted for 30 hours-50 hours, and it is ensured that a finally obtained product is still the liquid steel slag; (2), a mixture of lithium oxide, fluorine and sodium oxide is added into the liquid steel slag treated in the step (1), stirring and mixing are conducted, and the liquid state is kept for 20 hours-30 hours; and (3), the liquid steel slag treated in the step (2) is cooled, screening is conducted to obtain steel slag tailings with the particle size of 10 mm-100 mm, magnetic separation is carried out, and the separated steel slag tailings and ore are mixed and smelted. According to the ore smelting method with the steel slag tailings as the supporting frame, the treated steel slag tailings have high mechanical strength, can effectively maintain the air permeability of a stock column, can effectively supplement the iron content, avoids decomposition of CaCO3 and MgCO3, is good in coke saving effect, improves the fluidity of road conditions, and achieves the effect of stabilizing furnace conditions.

Description

technical field [0001] The invention belongs to the technical field of steel slag tailing treatment, and in particular relates to an ore smelting method using steel slag tailings as a supporting frame. Background technique [0002] At present, the general closed blast furnace uses limestone as the flux. During the smelting process, firstly, due to the decomposition reaction of limestone, CaCO 3 =CaO+CO 2 -Q, is an endothermic reaction that consumes part of the heat, resulting in increased energy consumption; secondly, the carbon dioxide decomposed by limestone dilutes the reducing atmosphere and reduces the reduction rate; thirdly, the carbon dioxide released by limestone at high temperature reacts with the carbon in coke :CO 2 +C=2CO-Q consumes a certain amount of fixed carbon and heat, reduces the amount of carbon burned, and increases the coke ratio. [0003] Steel slag tailings will expand and crack due to high free calcium in contact with water, which will cause pote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/08
CPCC21B3/08C21B2400/024C21B2400/068
Inventor 邓大军钱强范泽宇张入元
Owner PANZHIHUA GANGCHENG GROUP