Production method for grinding steel-iron slag powder, mineral slag powder and steel slag powder by using vertical mill

A technology for iron and steel slag powder and a production method, which is applied to the field of vertical mill grinding of iron and steel slag powder, can solve the problems of different hardness, easy separation of iron, different activities, etc., so as to reduce investment and product manufacturing costs, and reduce production capacity. Consumption and cost, the effect of simplifying production steps

Active Publication Date: 2015-01-21
JIANGSU RONGDA NEW MATERIAL
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Problems solved by technology

[0007] To mix slag and steel slag tailings in proportion and then enter the vertical mill to grind directly to produce steel slag powder, the first thing to solve is that the iron content and hardness of these two slags are different, and the difference between hot stuffy slag and hot splashing slag Factors such as different activity will affect a series of issues such as vertical mill efficiency, output, quality and energy consumption.
The research found that even if the iron content in the slag is controlled to be abo

Method used

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  • Production method for grinding steel-iron slag powder, mineral slag powder and steel slag powder by using vertical mill
  • Production method for grinding steel-iron slag powder, mineral slag powder and steel slag powder by using vertical mill
  • Production method for grinding steel-iron slag powder, mineral slag powder and steel slag powder by using vertical mill

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Embodiment 2

[0048] like image 3 As shown, the production method of slag powder: the slag stored in the mixed storage workshop is grabbed by the 20T driving grab into the slag silo and then transferred to the No. 16 belt conveyor outside the mixed storage workshop by the No. 15 belt conveyor. No. self-unloading electromagnetic iron remover to remove iron once, and then enter the electro-hydraulic wear-resistant slide to remove non-magnetic metal once after being detected by the metal detector, and then pass through the cone vibrating screen to crush the unbroken slag. The aperture of the screen is 80mm, and the slag with a particle size of less than 80mm is screened out into the steel and slag main batching bin (at this time, it is used as an independent slag batching bin, and the steel slag sub-batching bin is disabled at this time), and the slag with a particle size of ≥80mm is sent from the vibrating screen The bypass pipe is sent to the stacking warehouse, and after being crushed agai...

Embodiment 3

[0064] like Figure 4 As shown, the production method of steel slag powder: firstly, the steel slag tailings entering the vertical mill are respectively subjected to steel slag processing metal recovery treatment, and the slag entering the vertical mill is subjected to slag metal removal pretreatment. The specific steps are as in the first and second embodiments above, and will not be repeated here.

[0065] The steel slag tailings stored in the steel slag storage workshop are sent to the steel slag silo with a crane grab and sent to the No. 19 belt conveyor to the steel slag auxiliary batching bin, and sent to the No. 17 belt conveyor by the No. 2 quantitative feeder. From the steel and slag main batching bin, it is sent to the No. 17 belt conveyor by the No. 1 quantitative feeder. The iron slag is removed again by the No. 2 self-feeding electromagnetic iron remover, and the steel slag and slag components are mixed according to the ratio of 2-4:8-6, and then sent to the scre...

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Abstract

The invention relates to a production method for grinding steel-iron slag powder, mineral slag powder and steel slag powder by using a vertical mill. The innovation points comprise that the same vertical mill is employed for independently grinding steel-iron slag powder, mineral slag powder and steel slag powder, steel slag tailings obtained in the steel-slag processing and metal recovery processing step and mineral slag obtained in the mineral-slag metal-removal pretreatment step are sent into the vertical mill according to the ratio of 2-4:8-6, and then a step of using the vertical mill to grind steel and iron slag powder and a step of performing magnetic separation on a recycled material of the vertical-mill ground steel and iron slag powder to remove iron and performing closed cycling are executed, so that the technology of using the vertical mill to grind steel and iron slag powder is realized. The method helps to simplify conventional production steps of steel and iron slag powder, improve the uniformity of the steel and iron slag powder and reduce production energy consumption and cost. The production method is capable of realizing sharing of most of equipment while realizing recovery and reutilization of resource by using the same vertical mill to respectively grind steel and iron slag powder, mineral powder and steel slag powder, so that the utilization rate of equipment and resource are substantially improved, and the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to a production method for grinding iron and steel slag powder, slag powder and steel slag powder by a vertical mill. Background technique [0002] my country is a big country in steel production, accounting for nearly 50% of the world's total, so it is also a big country in steel slag production. The annual production of steel slag is nearly 93 million tons, and slag is more than 220 million tons. Slag Utilization Since 1999, in addition to the introduction of imported equipment and production lines by large iron and steel enterprises, there are also hundreds of domestic vertical mill grinding slag powder production lines; the utilization rate is 78% of 172 million tons. The utilization of steel slag is lagging behind in technology, magnetic separation, pre-grinding equipment research and development and policies. The annual utilization is 20.46 million tons, and the utilization rate is 22%. [0003] my country formulated steel...

Claims

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Application Information

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IPC IPC(8): C04B5/00
CPCC04B5/00
Inventor 张贤清杨亮翁哲峰
Owner JIANGSU RONGDA NEW MATERIAL
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