Steel slag composite powder and preparation method thereof

Abstract

The invention discloses steel slag composite powder and a preparation method thereof. The steel slag composite powder comprises the following raw materials by weight: 30 to 45kg of heat-stewed steel slag micro powder, 5 to 10kg of refining slag micro powder, 30 to 45kg of mineral slag micro powder, 3 to 3.5kg of polycarboxylic acid, 3 to 3.5kg of triethanolamine, 5 to 6kg of calcium sulfate, 4 to 5kg of polyaluminum sulfate and 2 to 3kg of dolomite powder. The preparation method comprises the following steps of: (1) crushing and pulverizing converter steel slag to obtain the heat-stewed steel slag micro powder for later use; (2) crushing refining slag to obtain the refining slag micro powder for later use; (3) putting the raw materials in a weight ratio into a ball mill and performing ball milling to obtain a mixture for later use; (4) pulverizing blast furnace slag to obtain the mineral slag micro powder for later use; and (5) mixing the mineral slag micro powder and the mixture in a weight ratio to obtain the steel slag composite powder. The steel slag composite powder is prepared from steel slag which is not required to be stored and various raw materials, and can be used in the raw materials of products such as cement, concrete and the like so as to fulfill the aims of reducing the manufacturing cost of the cement, the concrete and the like, improving product quality and expanding the use range of the steel slag.

Description

technical field [0001] The invention relates to the reuse of steel slag, which is a steel slag composite powder and a preparation method thereof. Background technique [0002] Better reutilization of steel slag has always been one of the main subjects of research by those skilled in the art. Although steel slag has been used in raw materials such as cement and concrete for road construction, due to the special formation of steel slag, there is a problem of easy expansion and cracking during use, resulting in short service life of products made of steel slag. And the product quality is more difficult to reach a high level, so that the utilization of steel slag is greatly restricted. At the same time, how to solve the problem of expansion cracking is also a difficult problem in this field that needs to be solved urgently so far. In order to solve the cracking problem, the only method currently used is to store the steel slag for more than one year before use, in order to red...

AI Technical Summary

Problems solved by technology

In order to solve the cracking problem, the only method currently used is to store the steel slag for more than one year before use, in order to reduce problems such as water cracking during use. However, storing steel slag has many disadvantages: it requires a large amount of space, and the dust is exposed to wind. Flying wildly, seriously polluting the environment