Device and method for adding desulfurization ash to slag before grinding

Abstract

The invention discloses a device and method for adding desulfurization ash to slag before grinding. The device comprises a plough-shaped cutting mechanism, a discharging mechanism and a splayed collection mechanism, wherein the plough-shaped cutting mechanism comprises a horned shell with the front portion larger than the rear portion, the rear end of the horned shell is opposite to the moving direction of a feeding belt, the bottom surface of the horned shell is arranged above the feeding belt and parallel to the feeding belt, and the two sides of the horned shell are spaced from the two sides of the feeding belt; the discharging mechanism is arranged right in front of the horned shell and comprises a silo and a discharging cylinder; the splayed collection mechanism is arranged right in front of the discharging mechanism and located on the upper surface of a slag layer, the splayed collection mechanism comprises a first collection board and a second collection board which are arranged into a splayed form, and a trapezoid opening with the front portion smaller than the rear portion is formed between the first collection board and the second collection board. By the adoption of the device and method, desulfurization ash can be added during feeding before slag grinding.

Description

technical field [0001] The invention belongs to the technical field of applying desulfurization ash to slag, and in particular relates to a device and method for adding desulfurization ash to slag before grinding. Background technique [0002] SO in the sintering flue gas of iron and steel enterprises 2 With large emissions, semi-dry flue gas desulfurization technology has become one of the mainstream technologies and development directions. Semi-dry desulfurization ash is CaSO 3 , CaSO 4 , Ca(OH) 2 and CaCO 3 The mixture, the particle size is fine, the specific surface area is about 500m 2 / kg, the moisture content is about 1%, and the flow is good. The disposal of desulfurization ash has long been a difficult problem at home and abroad. At present, most iron and steel enterprises use concentrated accumulation to dispose of desulfurization ash. This method not only occupies a large amount of land, but also increases the cost of disposal over time, and also forms a ne...

AI Technical Summary

Problems solved by technology

The current treatment methods are as follows: one is to build a new production line to mix and grind cement clinker, desulfurized ash, fly ash and blast furnace slag to produce cement, which is costly; the other is to use the existing slag powder production line to add desulfurized ash to the powder The ground slag powder is uniformly mixed. This method requires a special gas-solid mixing device, and because the air fluid will generate dust, dust removal treatment is required, and the structure is complicated.

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