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Method for producing ore slag micro powder by blast furnace water slag

A technology of blast furnace slag and slag fine powder, which is applied in the direction of cement production, etc., can solve the problems of dust noise pollution, cost reduction, etc., and achieve the effect of improving economic benefits, reducing costs, and realizing low-cost production

Inactive Publication Date: 2018-07-20
SICHUAN DAZHOU IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the application provides a method for producing slag powder with blast furnace slag, which solves the problems of dust and noise pollution in the production of slag powder by traditional ball mills and vertical mills, and realizes the green production of slag powder; The power used in the production process is the high-temperature and high-pressure steam produced by the steel factory, and the cost is significantly lower than that of the traditional ball mill or vertical mill.

Method used

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  • Method for producing ore slag micro powder by blast furnace water slag

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Embodiment 1

[0033] A method for producing fine slag powder by using blast furnace slag, a method for producing slag fine powder by using blast furnace slag, the particle size of the blast furnace slag is 2-4 mm, the water content is 10%, and the mass of each component of the furnace charge slag is Percent content is TFe: 0.3%, SiO 2 : 25%, Al 2 o 3 : 16%, CaO: 35%, MgO: 10%, TiO 2 : 8%, MnO: 0.6, S: 1.1, and the balance is impurities.

[0034] It includes the following steps:

[0035] (1) Blast furnace slag is loaded into the raw material bin by truck, and a vibrating feeder is installed under the raw material bin to feed the material to the belt conveyor at an appropriate speed. The blast furnace slag on the belt conveyor is lifted to the buffer bin by the elevator, and then passed The feeding valve feeds the material into the steam mill, the frequency of the feeding valve is controlled at 15Hz, and the hourly feeding volume is controlled at 4.5 tons;

[0036] (2) The blast furnace ...

Embodiment 2

[0039] A method for producing slag fine powder by using blast furnace slag, the particle size of the blast furnace slag is 2-5 mm, the water content is 12%, and the mass percentage of each component of the furnace charge slag is TFe: 0.6%, SiO 2 : 30%, Al 2 o 3 : 14%, CaO: 31%, MgO: 10%, TiO 2 : 7%, MnO: 0.4, S: 1.0, and the balance is impurities.

[0040] It includes the following steps:

[0041] (1) Blast furnace slag is loaded into the raw material bin by truck, and a vibrating feeder is installed under the raw material bin to feed the material to the belt conveyor at an appropriate speed. The blast furnace slag on the belt conveyor is lifted to the buffer bin by the elevator, and then passed The feeding valve feeds into the steam mill, where the frequency of the feeding valve is controlled at 10Hz, and the hourly feeding volume is controlled at 4 tons;

[0042] (2) The blast furnace slag fed into the steam mill is pulverized under the impact of the high-temperature and...

Embodiment 3

[0045] A method for producing fine slag powder by using blast furnace slag, a method for producing slag fine powder by using blast furnace slag, the particle size of the blast furnace slag is 2-4 mm, the water content is 15%, and the mass of each component of the furnace charge slag is Percent content is TFe: 0.6%, SiO 2 : 30%, Al 2 o 3 : 14%, CaO: 31%, MgO: 10%, TiO 2 : 7%, MnO: 0.4, S: 1.0, and the balance is impurities.

[0046] It includes the following steps:

[0047] (1) Blast furnace slag is loaded into the raw material bin by truck, and a vibrating feeder is installed under the raw material bin to feed the material to the belt conveyor at an appropriate speed. The blast furnace slag on the belt conveyor is lifted to the buffer bin by the elevator, and then passed The feeding valve feeds into the steam mill, the frequency of the feeding valve is controlled at 20Hz, and the hourly feeding volume is controlled at 5 tons;

[0048] (2) The blast furnace slag fed into t...

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Abstract

The invention discloses a method for producing ore slag micro powder by blast furnace water slag. The method comprises the following steps of (1) conveying the blast furnace water slag to a buffer material cabin; then, feeding the materials into a steam mill through a feeding valve; (2) crushing the blast furnace water slag under the impact of high-temperature and high-pressure steam in the steammill; feeding the crushed micro particle mixture into a grading machine to be graded into micro powder and coarse particles; (3) feeding the micro powder into a dust collector; returning the coarse particles back into the steam mill to be crushed again; (4) separating the micro powder and the steam to obtain a finished product of the ore slag micro powder. The method solves the problem of easy generation of dust and noise pollution of a conventional ore slag micro powder production process by a ball mill and a vertical mill. The green production of the ore slag micro powder is realized; meanwhile, the self produced high-temperature and high-pressure steam in a steel plant is used as power in the production process, so that the cost is obviously reduced through being compared with that of the conventional process using the ball mill or vertical mill.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting waste treatment, in particular to a method for producing slag micropowder with blast furnace slag. Background technique [0002] Blast furnace slag is the slag with the largest output in the metallurgical process. The molten material mainly composed of calcium silicate and calcium aluminosilicate is water-quenched and granulated, referred to as water slag, water-quenched slag, etc., accounting for about About 30%, 10 million tons of iron and steel enterprises generally output about 3 million tons of blast furnace slag, a large amount of blast furnace slag cannot be effectively used, piled up like a mountain, occupies a lot of land, loses activity due to weathering, pollutes the environment, and destroys ecological balance. The chemical components of water slag mainly include calcium oxide (CaO), silicon dioxide (SiO 2 ), aluminum oxide (Al 2 o 3 ) and other components, and the ac...

Claims

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Application Information

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IPC IPC(8): C04B5/00C04B7/147
CPCC04B5/00C04B7/147Y02P40/10
Inventor 周大伟龚波李元廷杨海波方维明张琦
Owner SICHUAN DAZHOU IRON & STEEL GROUP
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