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Method for producing alumina cement

A production method, the technology of bauxite cement, which is applied in the field of building materials, can solve the problems of reduced strength and poor moisture-proof performance of early-strength cement, and achieve the effects of low production cost, poor moisture-proof performance and wide source of raw materials

Active Publication Date: 2022-05-10
辽宁恒威水泥集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the defects existing in the prior art, the purpose of this invention is to provide a kind of production method of bauxite cement, utilize industrial solid waste-phosphogypsum, desulfurization gypsum, carbide slag, fly ash, aluminum ash to produce bauxite cement, and promote The combination of additives improves the early strength of industrial solid waste-based bauxite cement, and the later strength does not decrease significantly, and solves the technical problem of poor moisture resistance of early-strength cement

Method used

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  • Method for producing alumina cement
  • Method for producing alumina cement

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Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1 A kind of production method of alumina cement

[0036]Step 1: Dry the heat-treated aluminum ash, phosphogypsum, and fly ash at 150°C for 12 hours, and then crush them through 80 μm sieves. Mix 100kg of coal ash to obtain raw meal, add 100kg of water, stir at 100r / min for 5min, press into a circular test cake with a diameter of 50mm and a thickness of 8mm, and dry at 150°C for 8h;

[0037] Step 2: Heat the test cake dried in step 1 at a room temperature of 25°C at a heating rate of 5°C / min, raise the temperature to 1200°C, and keep it warm for 45 minutes; take out the calcined clinker, cool it with a fan, and heat it at a rate of 30°C / min. The cooling rate is cooled to room temperature 25°C to obtain clinker powder;

[0038] Step 3: Mix 1000kg of clinker powder obtained in step 2, 100kg of desulfurized gypsum, 50kg of calcium carbide slag, 10kg of calcium alginate, and 2kg of polycarboxylate superplasticizer, and grind them with a 350r / min ball mill to obta...

Embodiment 2

[0040] Embodiment 2 A kind of production method of bauxite cement

[0041] Step 1: Dry the heat-treated aluminum ash, phosphogypsum, and fly ash at 150°C for 12 hours, and then crush them through 80 μm sieves. Mix 100kg of coal ash to obtain raw meal, add 100kg of water and 1kg of boric acid, stir at 100r / min for 5min, press into a circular test cake with a diameter of 50mm and a thickness of 8mm, and dry at 150°C for 8h;

[0042] Step 2: Heat the test cake dried in step 1 at a room temperature of 25°C at a heating rate of 5°C / min, raise the temperature to 1200°C, and keep it warm for 45 minutes; take out the calcined clinker, cool it with a fan, and heat it at a rate of 30°C / min. The cooling rate is cooled to room temperature 25°C to obtain clinker powder;

[0043] Step 3: Mix 1000kg of clinker powder obtained in step 2, 100kg of desulfurized gypsum, 50kg of calcium carbide slag, 10kg of calcium alginate, and 2kg of polycarboxylate superplasticizer, and grind them with a 350...

Embodiment 3

[0045] Embodiment 3 A kind of production method of bauxite cement

[0046] Step 1: Dry the heat-treated aluminum ash, phosphogypsum, and fly ash at 150°C for 12 hours, and then crush them through 80 μm sieves. Mix 100kg of coal ash to obtain raw meal, add 100kg of water and 1kg of sodium pyroborate, stir at 100r / min for 5min, press into a circular test cake with a diameter of 50mm and a thickness of 8mm, and dry at 150°C for 8h;

[0047] Step 2: Heat the test cake dried in step 1 at a room temperature of 25°C at a heating rate of 5°C / min, raise the temperature to 1200°C, and keep it warm for 45 minutes; take out the calcined clinker, cool it with a fan, and heat it at a rate of 30°C / min. The cooling rate is cooled to room temperature 25°C to obtain clinker powder;

[0048] Step 3: Mix 1000kg of clinker powder obtained in step 2, 100kg of desulfurized gypsum, 50kg of calcium carbide slag, 10kg of calcium alginate, and 2kg of polycarboxylate superplasticizer, and grind them wit...

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Abstract

The invention discloses a production method of alumina cement. The preparation method comprises the following steps: calcining ardealite, fly ash and aluminum ash, adding zirconium dioxide, and continuously carrying out heat treatment to form a mullite-zirconite phase, thereby obtaining cement clinker; and mixing with desulfurized gypsum, carbide slag and an accelerant, and grinding to obtain the alumina cement. The alumina cement production method has the advantages that the utilization rate of industrial wastes is high; the prepared aluminosilicate cement has the advantages of high early strength, no decrease in later strength, low water absorption and less residual moisture, and can enhance the moisture resistance of the cement so as to delay the corrosion damage of the moisture to the cement.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a production method of alumina cement. Background technique [0002] Sulphoaluminate cement is mainly composed of calcium sulphoaluminate and dicalcium silicate. It has fast setting and hardening, high early strength, micro expansion, low shrinkage, good frost resistance, good impermeability and corrosion resistance. and other excellent performance. Cement with early-strength performance has poor moisture-proof performance. When encountering residual water in a humid environment, it will slightly expand. After expansion, its stability performance will decrease, which may reduce the mechanical strength; and early-strength cement is not suitable for In some large-scale buildings, there may be a risk of corrosion in a long-term humid environment. [0003] Patent CN 107265900 A discloses a composite early-strength agent for sulphoaluminate cement and early-strength sul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/26C04B7/32C04B28/14C04B14/30C04B22/08C04B24/04C04B24/38C04B111/27
CPCC04B11/26C04B7/32C04B28/144C04B22/082C04B22/08C04B24/38C04B24/04C04B14/306C04B2111/00017C04B2201/50C04B2111/27C04B18/0427C04B2103/302Y02P40/10
Inventor 孙超孙红宾张恒春
Owner 辽宁恒威水泥集团有限公司
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