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Preparation and application of rock salt concrete

A technology for concrete and rock salt, applied in the field of salt chemical industry, can solve problems such as incomplete use and large industrial waste salt, and achieve the effect of reducing mining cost, low cost and improving mining recovery rate

Inactive Publication Date: 2012-01-18
山发寿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of potash not only produces a large amount of magnesium chloride, but also produces a large amount of industrial waste salt. Due to the special environmental climate, the Lao government requires high standards for the development of mineral resources to protect the ecological environment, and the development of potash deposits in Laos cannot be fully adopted. There are traditional methods in the country

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0025] ① After adding 11.1% water to 7.4% bischofite, stir to let the magnesium chloride fully dissolve to make an aqueous solution of magnesium chloride;

[0026] ② Mix 2.6% lightly burned powder (88.0% magnesium oxide content) with 5.2% filler to make magnesite mixture;

[0027] ③ Add the magnesite mixture of ② into the magnesium chloride aqueous solution of ① and fully stir to prepare the magnesite cement slurry;

[0028] ④ Add 73.8% crushed salt (φ<2cm) to ③ magnesite cement slurry to prepare magnesite rock salt concrete slurry;

[0029] ⑤ Inject the magnesite rock-salt concrete slurry into the mold to make magnesite rock-salt concrete bricks, rock-salt concrete slabs or blocks;

[0030] ⑥ After one month, the compressive strength of magnesite rock salt concrete was measured to be 4.0MPa.

Embodiment example 2

[0032] ① After adding 8.0% water to 5.0% bischofolite, stir to fully dissolve magnesium chloride to make an aqueous solution of magnesium chloride;

[0033] ② Mix 11.0% magnesia (made by calcining dolomite, 23.0% magnesia content) with 11.0% filler to make magnesite mixture;

[0034] ③ Add the above-mentioned ② magnesite mixture into ① magnesium chloride aqueous solution and stir fully to obtain magnesite cement slurry;

[0035] ④ Add crushed salt 65.0% (φ<2mm) to the magnesite slurry in ③ to prepare magnesite rock salt concrete slurry;

[0036] ⑤ Inject the above ④ magnesite rock salt mud into the mold to make magnesite rock salt concrete bricks or blocks;

Embodiment example 3

[0038] ① Dilute the 34Be' old brine with water to 28Be', and take 30kg of the 28Be' magnesium chloride aqueous solution;

[0039] ② Mix 15kg of activated magnesia powder with 45kg of filler to make magnesite mixture;

[0040] ③ Add ② magnesite mixture into ① magnesium chloride aqueous solution and stir fully to obtain magnesite cement slurry;

[0041] ④ Add 80kg of crushed salt (φ<2mm) to the magnesite rock salt slurry in ③ to prepare magnesite rock salt concrete slurry;

[0042] ⑤ Pour ④ magnesite rock salt concrete slurry to a thickness of 10cm onto the Yantian embankment and pool slab;

[0043] ⑥After 2-3 hours, ⑤The rock salt concrete slurry is solidified, and a solid Yantian embankment slope protection and Yantian pond slab are formed after about a week.

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Abstract

The invention belongs to the technical field of chemical engineering, and relates to technology for preparing rock salt concrete by potassium ore tail salts, tailings and waste salts and applications. The invention is characterized in that the raw materials comprises: 30-85% of rock salts, 2.5-15% of magnesium oxide, 2.0-15% of magnesium chloride, 5.5-15% of water, 5-25% of fillers; the production characteristics of the rock salt concrete are that: (1) the production process is simple, and rock salt concrete slurry can be prepared by proportionally mixing magnesium oxide, a magnesium chloride aqueous solution, fillers, and rock salts; (2) the main raw materials required by the production are various halites, tail salts, waste salts or salt-containing slag generated during mining, and the production has low cost and no pollution; (3) the production is energy-saving and environment-friendly, and facilitates three-waste comprehensive utilization and environment protection; (4) the rock salt concrete can be used for backfill of salt mine gob areas, mine pits or roadways; the rock salt concrete can be used for pouring of various building foundations, salt pan pool plates and dam revetment in salt lake regions.

Description

technical field [0001] The invention belongs to the technical field of salt chemical industry, and relates to a technology and an application of making rock salt concrete by using potassium ore tailing salt, tailing residue and waste salt. Background technique [0002] my country is a large agricultural country with a huge demand for potash fertilizers, but potassium resources are very scarce, and domestic reserves cannot meet China's growing demand for potash fertilizers, which seriously restricts the development of potash fertilizer production and threatens national agricultural security. In recent years, the demand for potassium fertilizer in my country has been increasing day by day, but the domestic annual output is only about 3-4 million tons. The potassium fertilizer needed for agriculture is still mainly solved by imports, and the foreign dependence of potassium fertilizer is as high as more than 75%. This passive situation of long-term dependence on imports is not c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/32
Inventor 山发寿杜庆贵山发录山发财
Owner 山发寿
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