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Method for preparing ordinary Portland cement from vanadium-titanium slag partially instead of mineral slag

A technology of ordinary Portland cement and Portland cement, which is applied in cement production, etc., can solve problems such as insufficient utilization of vanadium-titanium slag, chloride ions exceeding the national standard, and 28-day strength reduction of cement. It is conducive to the rational use of resources, the effect of relieving environmental pressure and reducing environmental burden

Inactive Publication Date: 2020-02-21
承德金隅水泥有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Vanadium-titanium slag is an industrial by-product produced by vanadium-titanium steel special steel enterprises. Compared with ordinary slag, vanadium-titanium slag has a lower 28-day activity (about 75-80%) and a higher chloride ion content (0.1-0.4%). After adding more than a certain proportion in cement, firstly, the chloride ion of cement may exceed the national standard, and at the same time, the 28-day strength of cement is greatly reduced, which cannot meet the needs of users. Therefore, vanadium-titanium slag has not been fully and effectively used in the past few decades. , almost all of which were discharged, resulting in the formation of a large waste residue mountain around Chengde Iron and Steel Company, which encroached on land and damaged the environment

Method used

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  • Method for preparing ordinary Portland cement from vanadium-titanium slag partially instead of mineral slag
  • Method for preparing ordinary Portland cement from vanadium-titanium slag partially instead of mineral slag
  • Method for preparing ordinary Portland cement from vanadium-titanium slag partially instead of mineral slag

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Experimental program
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Effect test

Embodiment 1

[0025] The invention provides a vanadium-titanium slag instead of slag to produce ordinary Portland cement, including P.S.A32.5 and P.O42.5 Portland cement. The main materials used in the Portland cement include: clinker, Gypsum, limestone, coal-fired slag, slag and vanadium-titanium slag;

[0026] The preparation method of P.S.A32.5 cement, the specific operation steps are:

[0027] Step 1: Purchase clinker, gypsum, limestone, slag and vanadium-titanium slag;

[0028] Step 2: Take the above raw materials in proportion, mix them into the mill according to 48% of clinker, 4% of gypsum, 6% of limestone, 20% of slag and 22% of vanadium-titanium slag, and the total amount of slag and vanadium-titanium slag accounts for the total amount of the mixture 42% of that, the gypsum is set as low chlorine gypsum;

[0029] Step 3: Add a liquid grinding aid mainly based on triethanolamine in the grinding process, the mixing ratio is 0.035-0.045%, and the cement ratio is controlled at 400-4...

Embodiment 2

[0038] The invention provides a vanadium-titanium slag instead of slag to produce ordinary Portland cement, including P.S.A32.5 and P.O42.5 Portland cement. The main materials used in the Portland cement include: clinker, Gypsum, limestone, coal-fired slag, slag and vanadium-titanium slag;

[0039] The preparation method of P.S.A32.5 cement, the specific operation steps are:

[0040] Step 1: Purchase clinker, gypsum, limestone, slag and vanadium-titanium slag;

[0041] Step 2: Take the above raw materials in proportion, mix them into the mill according to 45% of clinker, 5% of gypsum, 8% of limestone, 21% of slag and 21% of vanadium-titanium slag, and the total amount of slag and vanadium-titanium slag accounts for the total amount of the mixture 42% of that, the gypsum is set as low chlorine gypsum;

[0042] Step 3: Add liquid grinding aid mainly composed of triethanolamine in the grinding process, the mixing ratio is 0.035-0.045%, and the cement ratio is controlled at 400-...

Embodiment 3

[0051] The invention provides a vanadium-titanium slag instead of slag to produce ordinary Portland cement, including P.S.A32.5 and P.O42.5 Portland cement. The main materials used in the Portland cement include: clinker, Gypsum, limestone, slag, slag and vanadium-titanium slag;

[0052] The preparation method of P.S.A32.5 cement, the specific operation steps are:

[0053] Step 1: Purchase clinker, gypsum, limestone, slag and vanadium-titanium slag;

[0054] Step 2: Take the above-mentioned raw materials in proportion, mix them into the mill according to 44% of clinker, 6% of gypsum, 8% of limestone, and 42% of slag, and the gypsum is ordinary desulfurized gypsum;

[0055] Step 3: Add liquid grinding aid mainly composed of triethanolamine in the grinding process, the mixing ratio is 0.035-0.045%, and the cement ratio is controlled at 400-430 to obtain P.S.A32.5 cement;

[0056] Step 4: P.S.A32.5 cement enters the cement silo and leaves the warehousing, or leaves the factory ...

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Abstract

The invention discloses a method for preparing ordinary Portland cement from vanadium-titanium slag partially instead of mineral slag, and particularly relates to the technical field of construction material preparation. The method is provided mainly aiming at the ordinary Portland cement, and the ordinary Portland cement comprises the following main materials: clinker, gypsum, limestone, mineralslag, fire coal furnace slag and the vanadium-titanium slag. According to the method, the low-chlorine gypsum is used to replace partial desulfurization gypsum to balance chloride ions in the cement,the vanadium-titanium slag is used to partially replace the mineral slag, so that the vanadium-titanium slag can be used reasonably, the ingredient costs of the cement are reduced and the waste discharge pressure in a Chengde iron and steel company is alleviated while the quality of the cement is guaranteed; and through dozens of laboratory ball mill tests and three months of industrial ball millproduction, production of the ordinary Portland cement by using 50% of vanadium-titanium slag instead of the mineral slag can be realized, the strength of the produced cement is qualified, the chloride ion content meet a national standard in China, the cement performance is not changed, and the ingredient costs are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of building material preparation, more specifically, the invention relates to a vanadium-titanium slag instead of slag to produce ordinary Portland cement. Background technique [0002] Most of the existing cement mixtures in the north use slag, which is an industrial by-product produced by ordinary iron and steel enterprises. In recent years, due to the national structural adjustment and environmental protection pressure, many iron and steel enterprises have stopped production and restricted production, so the output of slag is limited and the price is rapid. Climbing, from the original price of 45 yuan / ton to the current 150 yuan / ton, the cost of cement ingredients has also risen sharply. In this case, using vanadium-titanium slag to replace part of the slag greatly reduces the cost of cement production while maintaining the same strength and performance of the cement. [0003] Vanadium-titanium slag ...

Claims

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Application Information

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IPC IPC(8): C04B7/28C04B7/19C04B7/04C04B7/36
CPCC04B7/04C04B7/19C04B7/28C04B7/36Y02P40/10
Inventor 董艳春郑伟贾春利
Owner 承德金隅水泥有限责任公司
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