Semidry-process sintering desulphurization slag autoclaved building block and production method thereof

A technology of sintering desulfurization ash and semi-dry method, which is applied in the direction of manufacturing tools and ceramic molding machines, etc. It can solve the problems of land occupation for desulfurization ash building materials, low production cost, and high brick strength, so as to improve processing and disposal efficiency and production The effect of low cost and large amount of mixing

Inactive Publication Date: 2012-09-19
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a semi-dry sintered desulfurization slag steam-cured building block and its preparation method. This method can not only effectively solve the problem that the sintered semi-dry desulfurization ash cannot be used in building material production without oxidation treatment and solve the problem of iron and steel enterprises. The problem of land occupation and secondary pollution caused by a large amount of desulfurization ash storage, and the bricks made have higher strength, low production cost and good product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take the sintered semi-dry desulfurization ash from the iron and steel plant, dry it, and use it for later use. Dry in an oven at 85°C for 2 hours and grind it into slag powder, and control its specific surface area to not less than 450m 2 / kg, spare. Steel slag from iron and steel enterprises is taken, crushed and magnetically separated, and used for standby. The finished melon rice stones are purchased in the market, washed with water to remove the mud, and set aside. Weigh 20kg of semi-dry desulfurization ash, 30kg of slag micropowder, 40kg of steel slag, and 10kg of melon stone. Put various raw materials into the mixer at the same time according to the ratio of raw materials, add 7.5kg of water and mix well. Then it is formed by vibration and pressure of the brick making machine, and steamed after forming. During the steaming process, the temperature is raised from room temperature at a rate of 40°C / h to 110°C, and then the temperature is kept at a constant temper...

Embodiment 2

[0020] Take the sintered semi-dry desulfurization ash from the iron and steel plant, dry it, and use it for later use. Dry in an oven at 85°C for 2 hours and grind it into slag powder, and control its specific surface area to not less than 450m 2 / kg, spare. Steel slag from iron and steel enterprises is taken, crushed and magnetically separated, and used for standby. The finished melon rice stones are purchased in the market, washed with water to remove the mud, and set aside. Weigh 12kg of semi-dry desulfurization ash, 28kg of slag micropowder, 50kg of steel slag, and 10kg of melon stone, put various raw materials into the mixer at the same time according to the raw material ratio, add 8.12kg of water and mix well. Then it is formed by vibration and pressure of the brick making machine, and steamed after forming. During the steaming process, the temperature is raised from room temperature to 105 °C at a heating rate of 35 °C / h, kept at a constant temperature for 6 hours, an...

Embodiment 3

[0022] Take the sintered semi-dry desulfurization ash from the iron and steel plant, dry it, and use it for later use. Dry in an oven at 85°C for 2 hours and grind it into slag powder, and control its specific surface area to not less than 450m 2 / kg, spare. Steel slag from iron and steel enterprises is taken, crushed and magnetically separated, and used for standby. The finished melon rice stones are purchased in the market, washed with water to remove the mud, and set aside. Weigh 25kg of semi-dry desulfurization ash, 30kg of slag micropowder, and 45kg of steel slag, put all kinds of raw materials into the mixer at the same time according to the ratio of raw materials, add 6.6kg of water to mix and stir evenly. Then it is formed by vibration and pressure of a brick machine, and steamed after forming. During the steaming process, the temperature is raised from room temperature to 120 °C at a heating rate of 40 °C / h, kept at a constant temperature for 6 hours, and then lower...

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Abstract

The invention relates to a semidry-process sintering desulphurization slag autoclaved building block and a production method thereof. The building block is made of the following components in percent by weight in a combined autoclaving way: 5-30 percent of semidry-process sintering desulphurization ash, 30-60 percent of steel slag, 25-30 of superfine slag powder and 1-10 percent of pebble. The production method comprises the steps of vibrating and molding the components according to the percent by weight and autoclaving after molding to obtain the semidry-process sintering desulphurization slag autoclaved building block. The semidry-process sintering desulphurization slag autoclaved building block and the production method thereof have the advantages that the desulphurization ash, waste steel slag and slag of iron and steel enterprises are fully utilized, the wastes are turned into valuable things, the materials such as lime, carbide slag, binder, early strength agent and cement are not added, the energy is saved, the mixing quantity of the waste slag is high, the strength of the produced bricks are higher, the production cost is low, the product quality is high and all technical indexes satisfy the national standard on building bricks; and the treatment and disposal efficiency of the waste slag of the iron and steel enterprises is improved, the development level of secondary resources is improved, the quantity of the used cement in the building material industry can be reduced and the economic and environmental values are higher.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and environmental protection, and specifically refers to a semi-dry sintered desulfurization slag steam-cured building block and a preparation method thereof. Background technique [0002] Semi-dry sintering desulfurization ash is a by-product of desulfurization in the sintering system of iron and steel plants, and it is produced in a huge amount. Due to the lack of semi-dry sintering desulfurization ash utilization technology, 24,000 tons of sintering desulfurization ash can be produced every year, which can only be stockpiled. Stacking not only occupies land, pollutes the environment, but also increases the economic burden of enterprises. A large amount of desulfurization ash has brought a lot of dust pollution to the environment where the iron and steel enterprises are located, and also occupied a large amount of precious land resources, which is called a double waste of resources in enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00B28B1/08B28B3/00
Inventor 朱书景薛改凤方宏辉卢丽君
Owner 武钢集团有限公司
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