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Steel slag modification and steel slag cement

A steel slag and modification technology, which is applied in the field of steel slag road cement and steel slag medium hot cement, can solve the problems of difficult quality assurance and inactivity.

Inactive Publication Date: 2007-12-26
叶德敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, studies have proved [6] that certain components in steel slag, such as the RO phase, are not active at all
It is difficult to guarantee the quality of steel slag with different components to produce cement according to the same process

Method used

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  • Steel slag modification and steel slag cement

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one, steel slag ordinary cement: (with reference to standard GB175-92) converter steel slag:

[0026] Steel slag modifier formula: quicklime 42%, coal 30%, kaolin 20%, fluorite 5%, soda ash 3%, modifier addition: 10%. The formula and properties of ground steel slag ordinary cement are as follows:

[0027]

Embodiment 2

[0028] Embodiment 2, steel slag medium-heat cement: (refer to standard GB200-89), converter steel slag.

[0029] Steel slag modifier formula: quicklime 47%, coal 35%, quartz sand 10%, fluorite 5%, soda ash 3%. The addition of modifier is 8%, and the formula and performance of grinding medium-heat cement:

[0030] Component (%)

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Abstract

A process for preparing modified steel scrap by adding reforming agent in the scrap at agitation and separating iron from scrap while steel furnace discharging. The quality of pig obtained reaches the standards of clean steel scrap and ingot iron. Changing the formula of reforming agent, three kinds of modified steel scrap can be used for making ordinary cement, moderate cement and road cement. All steel scrap of electric furnace, rotary furnace and open-hearth furnace are reclaimable.

Description

1. Technical field [0001] The invention belongs to the technical field of environmental protection and building materials, and relates to the comprehensive utilization of steel slag, in particular to the steel slag modification treatment for realizing the separation of slag and iron from the steel slag and the production of steel slag ordinary cement, steel slag medium-heat cement and steel slag road cement with the modified steel slag. 2. Background technology [0002] The present invention is a follow-up improvement and expansion of another invention patent of the applicant—hot cement in steel slag (patent application No. 92108240.1). Steel slag modification treatment is mentioned in both the patent specification and claims of steel slag medium thermal cement, but how to carry out low-cost and high-efficiency steel slag modification treatment was still inconclusive at that time. [0003] At present, the steel slag separation technologies used in conventional production inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B5/00C04B7/14C04B7/153C21B3/04
CPCY02P10/20Y02P40/10Y02W30/50
Inventor 叶德敏
Owner 叶德敏
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