Autoclaved lime-sand brick containing steel slag tailings and preparation method thereof

A technology of autoclaved lime-sand bricks and steel slag tailings, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of difficult utilization of construction and production waste, reduce aging links, reduce Cost, Effect of Enhanced Strength

Active Publication Date: 2022-06-07
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problem that existing construction and production wastes are difficult to utilize, the present invention provides an autoclaved lime-sand brick containing steel slag tailings and a preparation method thereof. By preparing autoclaved lime-sand bricks from various components, the invention realizes The waste utilization of various construction and production wastes can effectively solve certain environmental pollution and waste of resources

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  • Autoclaved lime-sand brick containing steel slag tailings and preparation method thereof

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Comparison scheme
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Embodiment 1

[0047] The raw material composition of an autoclaved lime-sand brick containing steel slag tailings of this embodiment is shown in Example 1 in Table 1. The desulfurized ash is semi-dry desulfurized ash, the coarse aggregate is river sand, and the activator is desulfurized gypsum. The fineness or particle size of each component is as follows: the fineness of the tailings of the magnetic separation of steel slag is 0.08mm and the remainder is 23.9%; the SiO of the iron tailings is 23.9%. 2 The content is 68.9%, and the fineness modulus is 0.7; the coarse aggregate is river sand, and the fineness modulus is 2.5;

[0048] A kind of preparation method of the autoclaved lime-sand bricks containing steel slag tailings of the present embodiment, comprises the following steps:

[0049] S1. Dehydration process: use the dehydration equipment plate and frame filter press to dehydrate the steel slag magnetic separation tailings to a moisture content of 24.7%;

[0050] S2, mixing process...

Embodiment 2

[0055] The raw material composition ratio of an autoclaved lime-sand brick containing steel slag tailings of this embodiment is shown in Example 2 in Table 1. The desulfurization ash is semi-dry desulfurization ash, the coarse aggregate is gravel, and the activator is water glass. The fineness or particle size of each component is as follows: the fineness of the tailings of the magnetic separation of steel slag is 0.08mm and the remainder is 19.7%; the SiO of the iron tailings is 19.7%. 2 The content is 63.7%, and the fineness modulus is 0.86; the coarse aggregate is crushed stone, and the fineness modulus is 2.9;

[0056] A kind of preparation method of the autoclaved lime-sand bricks containing steel slag tailings of the present embodiment, comprises the following steps:

[0057] S1. Dehydration process: use a belt filter press of dehydration equipment to dehydrate the steel slag magnetic separation tailings to a moisture content of 23.5%;

[0058] S2, mixing process: the ...

Embodiment 3

[0063] The raw material composition ratio of an autoclaved lime-sand brick containing steel slag tailings of this embodiment is shown in Example 3 in Table 1. Among them, the desulfurized ash is semi-dry desulfurized ash, the coarse aggregate is crushed stone prepared by crushing old concrete, and the activator is desulfurized gypsum and sodium sulfate mixed in a mass ratio of 1:1. The fineness or particle size of each component is as follows: the fineness of the tailings of steel slag magnetic separation is 0.08mm and the remainder is 16.9%; the SiO of iron tailings is 16.9%. 2 The content is 62.5%, and the fineness modulus is 0.95; the coarse aggregate is crushed stone prepared by crushing old concrete, and the fineness modulus is 2.9;

[0064] A kind of preparation method of the autoclaved lime-sand bricks containing steel slag tailings of the present embodiment, comprises the following steps:

[0065] S1, dehydration process: use dehydration equipment centrifugal dehydrat...

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Abstract

The invention discloses an autoclaved lime-sand brick containing steel slag tailings and a preparation method thereof, belonging to the field of comprehensive utilization of solid waste. It is mainly composed of the following raw materials in proportion by weight: steel slag magnetic separation tailings: 35‑52 parts; desulfurization ash: 5‑13 parts; iron tailings: 7‑20 parts; coarse aggregate: 14‑20 parts ; Stone powder: 5-25 parts; Basalt fiber: 0.3-0.6 parts; Stimulator: 0.5-2 parts. Autoclaved lime-sand bricks are molded by vibration and pressure, and the bricks made are dense and high-strength, but strict proportioning of components is required to prepare high-quality autoclaved lime-sand bricks. Realize the waste utilization of various construction and production wastes, and can effectively solve the pollution problems of steel slag magnetic separation tailings and desulfurization ash.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of solid waste, in particular to an autoclaved lime-sand brick containing steel slag tailings and a preparation method thereof. Background technique [0002] The steel industry and the construction industry generate a large amount of waste every year, which is difficult to handle, accumulates and occupies land resources, and may also cause environmental pollution. This includes steel slag. Steel slag is the waste slag produced in the process of iron and steel smelting. The amount of waste slag produced every year can reach tens of millions of tons. Since steel slag contains a small amount of iron, magnetic separation is often used to recover iron. For the separation efficiency and iron recovery rate, the steel slag must be ground to a very fine particle size. The use of wet ball milling and wet magnetic separation can improve the iron recovery efficiency, but a large amount of ta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B28/26
CPCC04B28/144C04B28/26C04B18/142C04B18/12C04B18/062C04B14/068C04B14/46C04B18/16C04B22/147Y02W30/91
Inventor 盛广宏马研王诗生刘玲
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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