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Cement produced by utilizing industrial solid wastes and preparation method of cement

A waste, solid-state technology, applied in the field of cement and its preparation, can solve the problems affecting the ecological protection of Hezhou City, the single utilization of waste residues, and the occupation of land resources by high-magnesium waste rocks, so as to improve the comprehensive utilization range, increase the processing difficulty, The effect of prolonging the setting time

Active Publication Date: 2017-12-15
华润水泥(富川)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, marble stone processing produces a large amount of sawdust and leftovers, but none of them can be disposed of in a timely and effective manner, resulting in random burial and piles, which have seriously affected the ecological protection of Hezhou City, and some enterprises have been forced to suspend production for rectification
At the same time, cement mines are excavated to produce cement, and a large amount of high-magnesium waste rock occupies land resources, which not only wastes resources, but also causes certain pressure on the environment
The invention with the application number 201210470288.X discloses a preparation of Portland cement clinker by using marble stone powder and its preparation method. Marble waste and high-silicon iron tailings are used as admixtures to prepare cement, which saves energy, but the use of waste residue Relatively simple, and the strength of the prepared cement is low, which needs to be improved
The invention patent with application number 201510274585.0 discloses a high-magnesium waste rock powder-based composite mineral admixture and its application in high-strength concrete. The high-magnesium waste rock is ground to obtain a high-magnesium waste rock powder-based composite mineral as a concrete admixture. It provides a way to utilize high-magnesium waste rock, but the doping amount is low and the utilization rate is not high

Method used

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  • Cement produced by utilizing industrial solid wastes and preparation method of cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A cement produced from industrial solid waste, made of the following raw materials in weight percentages:

[0038] Clinker 80.50%, furnace bottom slag 3.40%, desulfurization gypsum 2.10%, mining waste rock 4.70%, high silica sandstone 1.00%, fly ash 0.90%, high magnesium waste rock 5.00%, phosphogypsum 2.10%, titanium gypsum 0.30% ;

[0039] Wherein said clinker is made from the raw material of following weight percent:

[0040] Ordinary limestone 73.90%, marble sawdust 4.70%, marble scrap 6.40%, high-magnesium waste rock 2.00%, sandstone 10.60%, laterite 1.90%, wet discharge fly ash 0.50%.

[0041] A preparation method for producing cement by utilizing industrial solid waste, comprising the following steps:

[0042] (1) Press-filter the water content of natural marble or artificial marble sawdust to ≤25%, then mix and grind marble sawdust, marble scraps, high-magnesium waste rock, ordinary limestone, sandstone and laterite according to the mass percentages mentioned ...

Embodiment 2

[0047] A cement produced from industrial solid waste, made of the following raw materials in weight percentages:

[0048] Clinker 82.50%, furnace bottom slag 0.30%, desulfurization gypsum 2.60%, mining waste rock 5.00%, fly ash 6.70%, high magnesium waste rock 2.20%, titanium gypsum 0.70%;

[0049] Wherein said clinker is made from the raw material of following weight percent:

[0050] Ordinary limestone 75.00%, marble sawdust 2.50%, marble scrap 3.50%, high magnesium waste rock 2.00%, sandstone 10.00%, laterite 4.00%, wet discharge fly ash 3.00%.

[0051] In this embodiment, in the clinker, marble waste accounts for 6.00%, high-magnesium waste rocks account for 2%, and when preparing cement, other solid wastes account for 17.50%, of which high-magnesium waste rocks account for 2.20%, and titanium gypsum 0.70%.

[0052] The preparation method is the same as in Example 1.

Embodiment 3

[0054] A cement produced from industrial solid waste, made of the following raw materials in weight percentages:

[0055] Clinker 77.00%, furnace bottom slag 2.50%, desulfurization gypsum 5.55%, mining waste rock 7.60%, fly ash 5.90%, high magnesium waste rock 0.40%, phosphogypsum 0.55%, titanium gypsum 0.70%;

[0056] Wherein said clinker is made from the raw material of following weight percent:

[0057] Ordinary limestone 80.24%, marble sawdust 2.00%, high-magnesium waste rock 4.10%, sandstone 11.60%, laterite 1.70%, wet discharge fly ash 0.36%.

[0058] In this embodiment, in the clinker, marble wastes accounted for 2.00%, high-magnesium waste rocks accounted for 4.10%, and when preparing cement, other solid wastes accounted for 23.00%, of which high-magnesium waste rocks accounted for 0.40%, titanium gypsum 0.70%.

[0059] The preparation method is the same as in Example 1.

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Abstract

The invention provides cement produced by utilizing industrial solid wastes. The cement is prepared from the following raw materials: 77.00-82.50% of clinker, 0.30-7.90% of blaster furnace slag, 1.60-5.55% of desulfurization gypsum, 2.90-7.60% of waste rocks, 0-1.00% of high-silicon sandstone, 0.70-6.70% of fly ash, 0-12.00% of high magnesium waste rock, 0-2.40% of phosphogypsum and 0-0.80% of titanium gypsum, wherein the clinker is prepared from the following raw materials: common limestone, marble sawdust, marble leftover material, high magnesium waste rock, sandstone, red clay and wet-discharged fly-ash. According to the cement, the cement raw material is prepared by using the marble sawdust and leftover material, the waste residue utilization rate is high, and lots of natural resources and energy can be saved. Meanwhile, the high magnesium waste rock is used for preparing the raw material and serves as a mixed material of the cement to be simultaneously used, and the utilization rate of the high magnesium waste rock is greatly improved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to cement produced by utilizing industrial solid waste and a preparation method thereof. Background technique [0002] Cement is widely used in industrial and civil construction. Traditional cement clinker is calcined with natural mineral resources and energy such as limestone, clay, silica sand, iron ore, gypsum, fluorite, coal, etc., which wastes a lot of natural resources and energy. At present, the cement produced by industrial waste residue can reduce the production cost of cement. Industrial waste residues such as fly ash are widely used in the cement field as mixed materials, but in recent years, industrial waste residues such as fly ash have been in short supply and cannot meet the demand. [0003] With the rapid development of my country's economy and construction, the investment in infrastructure construction continues to increase, and the stone processing and cement co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/24C04B7/147
CPCC04B7/147C04B7/24C04B7/26Y02P40/10
Inventor 吴有武崔辰纪友红曾荣覃鹏飞杨成
Owner 华润水泥(富川)有限公司
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