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Grass-planting brick made by sintering flue gas semi-dry method desulfurization ash and its manufacturing method

A semi-dry method of desulfurization and sintering flue gas technology, which is applied in the field of grass-planting bricks and its manufacturing, can solve the problems of reducing, increasing compressive strength, and high cost of grass-planting bricks, and achieves high strength, improved compressive strength, high economic value and The effect of environmental value

Inactive Publication Date: 2017-01-04
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing grass-planting bricks have the following disadvantages: 1) As a load-bearing surface, the compressive strength needs to be improved; 2) The cost of grass-planting bricks is high and needs to be reduced

Method used

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  • Grass-planting brick made by sintering flue gas semi-dry method desulfurization ash and its manufacturing method
  • Grass-planting brick made by sintering flue gas semi-dry method desulfurization ash and its manufacturing method
  • Grass-planting brick made by sintering flue gas semi-dry method desulfurization ash and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First, take the semi-dry desulfurization ash from the iron and steel plant, steel slag after iron selection, and mineral powder and put them in an oven at 100°C for drying. Among them, the particle size of the steel slag is 0.1-9mm, and the specific surface area of ​​the mineral powder is 450-800m 2 / kg, and prepare cement and commercially available finished melon stones. The melon stones are washed to remove mud and then used for later use; then desulfurization ash: steel slag: mineral powder: cement: melon stones = 10%: 40%: 30%: 5% : 15% by weight percentage ratio to weigh the raw materials, mix them to form a dry material, put the dry material into the mixer, add water according to the moisture content of 4 to 8%, preferably 5%, and stir evenly to form a wet mixture; The wet mixture is poured into the mould, and pressed at room temperature and pressure of 170-550 tons, preferably 350 tons, to form a grass-planting brick embryo body. After being taken out of the mold,...

Embodiment 2

[0030] First, take the semi-dry desulfurization ash from the iron and steel plant, steel slag after iron selection, and mineral powder and put them in an oven at 100°C for drying. Among them, the particle size of the steel slag is 0.1-9mm, and the specific surface area of ​​the mineral powder is 450-800m 2 / kg, and prepare cement and commercially available finished melon stones. The melon stones are washed to remove the mud and then used for later use; then desulfurization ash: steel slag: mineral powder: cement: melon stones=15%:40%:25%:5% : 15% weight percentage ratio Weigh the raw materials, mix them to form dry materials, put the dry materials into the mixer, add water according to the moisture content of 7.5%, and mix well to form a wet mixture; finally inject the wet mixture into the mold , Pressed under 350 tons of pressure to make grass-planting brick embryos. After being taken out of the mold, the embryos are maintained at room temperature for 7 days, and water is fetc...

Embodiment 3

[0032] First, take the semi-dry desulfurization ash from the iron and steel plant, steel slag after iron selection, and mineral powder and put them in an oven at 100°C for drying. Among them, the particle size of the steel slag is 0.1-9mm, and the specific surface area of ​​the mineral powder is 450-800m 2 / kg, and prepare cement and commercially available finished melon stones. The melon stones are washed to remove the mud and then used for later use; then desulfurization ash: steel slag: mineral powder: cement: melon stones = 20%: 40%: 20%: 5% : 15% weight percentage ratio Weigh the raw materials, mix them to form a dry material, put the dry material into the mixer, add water according to the moisture content of 6%, and mix well to form a wet mixture; finally inject the wet mixture into the mold , Pressed under 350 tons of pressure to make grass-planting brick embryos. After being taken out of the mold, the embryos are maintained at room temperature for 7 days, and water is f...

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Abstract

The invention discloses a grass planting brick manufactured from sintered flue gas semi-dry desulfurization ash and a manufacture method of the brick. The grass planting brick comprises the following components in percentage by weight: 5-25% of semi-dry desulfurization ash, 30-50% of steel slag, 10-30% of mineral powder, 0-10% of cement and 5-20% of aggregate. The manufacture method comprises the following steps of 1) taking baked and ground components, and mixing according the ratio to obtain a dry material, and then adding water into the dry material, and stirring uniformly to obtain a wet mixture; 2) injecting the wet mixture into a grass planting brick mold and pressing into a green brick body under the conditions of room temperature and 170-550 tons of pressure; and 3) curing the green brick body for 7-8 days in the open air at room temperature, spraying water to keep the surface of the green brick body to be moist and then laying the green brick body up for 28-30 days naturally to obtain the high-intensity grass planting brick. The compressive strength of the grass planting brick manufactured by the manufacture method reaches 10Mpa above after 7 days and 15Mpa after 28 days respectively and is increased by 50% than that of an existing conventional grass planting brick. The compressive strength of the grass planting brick is greatly increased and recycling of waste slag is achieved.

Description

technical field [0001] The invention relates to a resource recovery technology of flue gas desulfurization by-products, in particular to a grass planting brick manufactured by sintering flue gas semi-dry desulfurization ash and a manufacturing method thereof. Background technique [0002] Semi-dry desulfurization ash is a by-product of the semi-dry flue gas desulfurization system in iron and steel plants. Since there is no better way to use it, it is mainly stockpiled at present. With the increase of semi-dry desulfurization projects, the production of desulfurization ash is increasing year by year. According to statistics, a 360m 2 The sintering machine adopts full flue gas desulfurization, which produces 40,000 to 50,000 tons of desulfurization ash every year. A large amount of desulfurization ash has caused serious pollution to the ecological environment, and it has also brought huge environmental pressure to desulfurization enterprises. [0003] In addition, as the pace...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
Inventor 卢丽君薛改凤方宏辉朱书景吴英刘瑛
Owner 武汉钢铁有限公司