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A method for integrated grinding of green ecological industrial solid waste and cement

A solid waste and integrated powder technology, which is applied in cement production, clinker production, etc., can solve the problems of the difference in the grindability of raw materials, the low specific surface area of ​​fine powder, and the low performance of cement, so as to reduce energy consumption and improve drying efficiency. High and low unit power consumption

Active Publication Date: 2016-03-30
武汉市天沭科技发展有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term production practice shows that when clinker and industrial solid waste are co-ground to produce cement, due to the difference in grindability of clinker and industrial solid waste, the specific surface area of ​​the hard-to-grind industrial solid waste fine powder in cement is low , when the cement is hydrated, the activity of the industrial solid waste cannot be fully exerted, resulting in some properties of the cement being low, and the amount of the industrial solid waste in the cement cannot be fully increased.
[0004] Experts in the industry proposed to use the process mode of grinding cement and industrial solid waste separately to solve the problem of the difference in the grinding properties of raw materials, but this also involves repeated land occupation of the plant, investment in civil engineering and equipment, management and operation inspections, the number of workers, Macro planning of maintenance workload, spare parts quantity, daily working capital, etc.

Method used

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  • A method for integrated grinding of green ecological industrial solid waste and cement
  • A method for integrated grinding of green ecological industrial solid waste and cement
  • A method for integrated grinding of green ecological industrial solid waste and cement

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1, A company produces slag fine powder and cement.

[0032] When producing slag fine powder, the slag with a water content of 12% is sent to online drying, and the raw material with a water content of 1% after drying is sent to the pre-crushing for extrusion to form a material cake, and then the powder is separated by high-efficiency classification. After the material cake is broken up, the fine powder with a specific surface area of ​​more than 300 square meters per kilogram is selected and collected for grinding and particle shaping, and the granular steel and iron fine powder are selected to obtain slag fine powder with a specific surface area of ​​435 square meters per kilogram;

[0033] When producing cement, raw materials with a water content of 3% consisting of cement clinker, gypsum, and slag are sent to online drying, and after drying, raw materials with a water content of 0.6% are sent to pre-crushing for extrusion to form material cakes. Then, thro...

Embodiment 2

[0035] Embodiment 2, B company produces steel slag fine powder and cement.

[0036] When producing steel slag micropowder, the steel slag with a water content of 12% is sent to online drying, and the raw material with a water content of 1.5% after drying is sent to the pre-crushing for extrusion to form a material cake, and then through efficient classification and powder selection. After the material cake is broken up, the fine powder with a specific surface area of ​​285 square meters per kilogram is selected and collected for grinding and particle shaping, and the granular steel and iron fine powder are selected to obtain steel slag fine powder with a specific surface area of ​​405 square meters per kilogram;

[0037] When producing cement, raw materials with a water content of 4.5% consisting of cement clinker, gypsum, fly ash, and steel slag are sent to online drying, and after drying, raw materials with a water content of 0.8% are sent to pre-crushing for extrusion. Form...

Embodiment 3

[0039] Example 3. Company C produces bottom slag-coal gangue composite micropowder and cement.

[0040] When producing bottom slag-coal gangue composite micropowder, the mixture of bottom slag and coal gangue with a water content of 18% is sent to online drying, and the raw material with a water content of 2% after drying is sent to the pre-crushing machine for extrusion Press to form a material cake, and then disperse the material cake through high-efficiency classification and powder selection to select fine powder with a specific surface area of ​​more than 300 square meters per kilogram and collect them for grinding and particle shaping to obtain a specific surface area of ​​450 square meters per kilogram Bottom slag-coal gangue composite micropowder;

[0041] When producing cement, raw materials with a water content of 4% consisting of cement clinker, gypsum, fly ash, furnace bottom slag, and coal gangue are sent to online drying, and raw materials with a water content of...

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Abstract

The invention discloses a method for commonly and integrally milling green ecological industry solid waste and cement, which comprises the following steps: precise proportioning of raw materials, on-line drying, pre-pulverizing, efficient graded powder selection, grinding and particle shaping, micropowder collection and storage, and immediate-feedback operation control. The method implements multiple purposes in one mill, can be used for producing diversified products, can implement energy saving and emission reduction in many aspects, greatly lowers the demands of cement industry for fossil resources, and has great promotion effects on transformation and upgrading of the whole construction material industry.

Description

technical field [0001] The invention belongs to the field of high-efficiency renewable resource utilization of industrial solid waste, and relates to a method for integrated grinding of green ecological industrial solid waste and cement. Background technique [0002] Cement grinding is one of the most important key links in cement production, and its energy consumption accounts for 30% of the total energy consumption and more than 40% of the total electricity consumption. To realize the sustainable development of the cement and concrete industry, it is necessary to take the road of "ecological green production" characterized by "low energy consumption, low resource consumption, and low pollution". In the entire life cycle of product design, production, use and end-of-life treatment, strive to adopt measures such as clean energy and raw materials, advanced technology and equipment, and improve comprehensive utilization to achieve "energy saving, material saving, emission redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/48C04B7/52
CPCY02P40/10Y02P40/121
Inventor 田栗华田晨君田键王金地
Owner 武汉市天沭科技发展有限公司