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Phosphoaluminate cement produced from industrial waste residues and production method of phosphoaluminate cement

A technology of aluminophosphate cement and industrial waste residue, applied in the field of aluminophosphate cement and its production, and the field of aluminophosphate cement, can solve the problem of poor stability of aluminophosphate cement products and the use of aluminophosphate cement raw materials , high production costs and other problems, to achieve the effect of saving non-renewable resources, improving utilization, and reducing coal consumption

Active Publication Date: 2017-09-01
葛洲坝石门特种水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the consumption of a large amount of expensive bauxite in the production of aluminophosphate cement and the need for high firing temperature, the price of MgO in the composite mineralizer used is also expensive, making the production cost very expensive
[0003] High-magnesium mining waste rock is the most common mining waste rock in lime mining. Because the MgO in the high-magnesium interlayer exceeds the standard, most of which exceed 3.2%, it cannot be directly used as a raw material for aluminophosphate cement, otherwise it will cause phosphorus and aluminum Poor stability of salt cement products
[0004] Phosphate ore tailings are tailings produced after phosphate ore mining. At present, a large amount of phosphate ore tailings has accumulated, which affects the environment.

Method used

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  • Phosphoaluminate cement produced from industrial waste residues and production method of phosphoaluminate cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Raw materials such as high-magnesium mining waste rock, phosphate rock tailings, electrolytic aluminum slag, and sulfuric acid slag are crushed and put into raw material storage for storage.

[0019] 2. Raw material batching: 30% of high-magnesium mining waste rock, 32% of electrolytic aluminum slag, 30% of phosphate rock tailings, and 8% of sulfuric acid slag, and the batching is carried out through weighing scales. The chemical composition of each raw material is shown in Table 1, and the mass percentage of each chemical composition in the raw meal in a dry state is shown in Example 1 in Table 2.

[0020] 3. Mix the prepared raw materials and send them to the vertical mill (ball mill) for grinding, and then enter the homogenization warehouse for homogenization after grinding.

[0021] 4. Send the raw meal powder from the homogenization store into the five-stage preheater, and the raw meal powder will fully and efficiently exchange heat with the hot flue gas from th...

Embodiment 2

[0026] The batching of raw materials in step (2) in Example 1 is designed as follows: 33% of high-magnesium mining waste rock, 25% of electrolytic aluminum slag, 35% of phosphate ore tailings, and 7% of sulfuric acid slag, and the batching is carried out by weighing scales. The chemical components of each raw material are shown in Table 1, and the mass percentages of each chemical component in the raw meal in a dry state are shown in Example 2 in Table 2.

[0027] All the other steps are the same as in Embodiment 1. The chemical components and mineral components in the clinker are shown in Example 2 in Table 3, and the physical properties of the clinker are shown in Example 2 in Table 4.

Embodiment 3

[0029] The batching of the raw meal in step (2) of the first embodiment is designed as follows: 30% of high-magnesium mining waste rock, 24% of electrolytic aluminum slag, 40% of phosphate ore tailings, and 6% of sulfuric acid slag, and the batching is carried out by weighing scales. The chemical composition of each raw material is shown in Table 1, and the mass percentage of each chemical composition in the raw meal in a dry state is shown in Example 3 in Table 2.

[0030] All the other steps are the same as in Embodiment 1. The chemical components and mineral components in the clinker are shown in Example 3 in Table 3, and the physical properties of the clinker are shown in Example 3 in Table 4.

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Abstract

The invention discloses phosphoaluminate cement produced from industrial waste residues. A raw material of the phosphoaluminate cement is prepared from the following materials in percentage by weight: 25 to 35 percent of high-magnesium mining waste rocks, 20 to 35 percent of electrolytic aluminum slag, 30 to 45 percent of phosphorite tailings and 5 to 10 percent of sulfate slag. According to the phosphoaluminate cement produced from the industrial waste residues, industrial solid wastes are used as raw materials, and no consumption of expensive bauxite and the like is needed, so that the production cost is greatly reduced; meanwhile, by full use of the high-magnesium mining waste rocks, the electrolytic aluminum slag, the phosphorite tailings and the sulfate slag, the use rate of the industrial solid wastes is increased, and non-renewable resources are saved; meanwhile, a cement clinker is relatively low in firing temperature; clinker particles are small, uniform and tidy, and the characteristics of calcium aluminophosphate, a calcium aluminate solid solution, a calcium phosphate solid solution and a glass body can be stabilized; the clinker has grindability.

Description

technical field [0001] The invention relates to aluminophosphate cement, in particular to aluminophosphate cement produced by utilizing industrial waste residue and a production method thereof, belonging to the technical field of special cement production. Background technique [0002] Aluminophosphate cement has excellent mechanical properties such as rapid hardening, early strength, and high strength. The cement slurry system has excellent durability, frost resistance, carbonation resistance, chemical corrosion resistance, and penetration resistance. It is widely used in emergency repair projects, marine engineering etc. Aluminophosphate cement is obtained from aluminum, iron, calcium, siliceous and phosphorus-containing mineral materials through batching, grinding, firing, grinding and other preparation processes, and its mineral components are mainly aluminophosphate Calcium, calcium aluminate solid solution, calcium phosphate solid solution and part of the vitreous. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/02
CPCC04B12/027
Inventor 覃爱平程海平
Owner 葛洲坝石门特种水泥有限公司
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