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A kind of equipment and method for producing cement with liquid steel slag as raw material

A liquid steel slag and cement technology, which is applied in cement production, furnaces, furnace types, etc., can solve the problems of occupying the steelmaking slag discharge site, the lifting range is not large, and the slag discharge time is prolonged, so as to achieve less heat loss and good airtightness , Furnace type simple effect

Active Publication Date: 2021-09-21
上海驰春节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Steel slag reconstruction is to use steel slag as a raw material for cement production, and produce cement clinker through secondary calcination or remelting; these processes and methods require crushing, grinding and mixing, and the utilization rate of steel slag is low and consumes energy
In order to utilize the heat enthalpy of high-temperature liquid steel slag in online reconstruction, it is necessary to quickly add regulating material when discharging liquid steel slag next to the converter, occupying the steelmaking slag discharge site and prolonging the slag discharge time, which will affect steelmaking production; whether the regulating component is discharged in liquid state Adding steel slag to the slag tank before adding it or adding it as it is discharged, it is difficult to make the high-temperature solid-liquid two-phase mix evenly and completely chemically react. Therefore, the hydration activity index of the reconstituted steel slag powder only increases by 4-8% in 28 days, and the improvement rate is not large. Large; modified steel slag in the converter will affect the smelting of steel

Method used

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  • A kind of equipment and method for producing cement with liquid steel slag as raw material
  • A kind of equipment and method for producing cement with liquid steel slag as raw material
  • A kind of equipment and method for producing cement with liquid steel slag as raw material

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Effect test

Embodiment 1

[0059] Adopt certain steel mill steel slag in the described embodiment, its chemical composition is as follows

[0060] Element SiO2 Al2O3 FeO CaO MgO MnO P2O5 f-CaO T.Fe content% 10.20 1.21 12.32 41.58 11.49 3.09 1.50 8.07 20.16

[0061] The contrast cement used in the embodiment is a cement factory PII42.5 cement, and the chemical composition and physical properties of the cement are as follows

[0062]

[0063] Standard sand in the embodiment: cement mortar test adopts China ISO standard sand (GB 178-97)

[0064] Water in the embodiments: tap water is used when forming steel slag clean slurry and mortar, and distilled water is used when free calcium oxide is measured.

[0065] Correction raw material in the embodiment: correction raw material has coal ash content, iron powder;

[0066]

[0067] The industrial analysis of coal combustion is as follows

[0068] ω(Mad) ω(Vad) ω(Aad) ω(Fcad) Qnet.ad 0.06...

Embodiment 2

[0081] Adopt certain steel mill steel slag in the described embodiment, its chemical composition is as follows

[0082] Element SiO2 Al2O3 TiO2 CaO MgO Na2O P2O5 K2O T.Fe content% 14.73 4.06 0.86 48.00 7.62 0.17 1.04 0.075 14.3

[0083] The contrast cement used in the embodiment is a cement factory PII42.5 cement, and the chemical composition and physical properties of the cement are as follows

[0084]

[0085] Standard sand in the embodiment: cement mortar test adopts China ISO standard sand (GB 178-97) water in the embodiment: tap water is used when forming steel slag clean slurry and mortar, and distilled water is used when free calcium oxide is measured.

[0086] Correction raw material in the embodiment: correction raw material has coal ash content, iron powder;

[0087]

[0088] The industrial analysis of coal combustion is as follows

[0089] ω(Mad) ω(Vad) ω(Aad) ω(Fcad) Qnet.ad 0.06％ 22.42％ ...

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Abstract

The invention discloses a cement production equipment and method using liquid steel slag as raw material, comprising a furnace body, a horizontal liquid flow hole, an ascending flow liquid path, and an overflow hole. The furnace body is in a cylindrical shape, and the bottom of the furnace body is There is an iron outlet, the furnace body is provided with a first refractory material frame, and the first refractory material frame is provided with carbon materials, and the side wall of the furnace body located on the upper side of the first refractory material frame is installed with A combustion lance and a liftable top combustion lance are inserted on the side of the furnace wall, and the liftable top combustion lance is connected to the top of the furnace body through a casing to be liftable. The top of the furnace body is provided with a slag liquid inlet and an inclined conical furnace cover. Without affecting steel smelting, use high-temperature liquid slag to add silicon-aluminum correction raw materials, flow through the carbon reduction bed and active lime saturation zone in the furnace, decompose RO phase, reduce FeOx and recover molten iron to generate liquid cement clinker, and liquid cement is cooked The heat released when the material is cooled and solidified can be recovered.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of metallurgical slag, in particular to equipment and a method for producing cement by using liquid steel slag as a raw material. Background technique [0002] Blast furnace gas, slag, and steel slag are the top three by-products of iron and steel smelting. Blast furnace gas has been fully recycled, and 99% of slag is used in cement mixtures and concrete admixtures, but steel slag is used very little. Low, the comprehensive utilization rate is only 30-40%, of which only about 10% is used in cement and concrete, and most of them are piled up and discarded. [0003] The main chemical components of slag, steel slag and Portland cement clinker are basically similar, but the oxide content is quite different. Compared with slag, the chemical content of steel slag and Portland cement clinker is closer; Salt cement clinker has a similar mineral composition; both steel slag and Portland ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/153C04B7/24C04B7/36C04B7/38C04B7/43C04B12/02C21B11/08
CPCC04B7/153C04B7/24C04B7/36C04B7/38C04B7/43C04B12/027C21B11/08Y02P40/10
Inventor 李志远郁国忠
Owner 上海驰春节能科技有限公司