Comprehensive utilization method of boric sludge

A boron mud and mixture technology, applied in the field of comprehensive utilization of boron mud, can solve the problems of high energy consumption, low concentration of magnesium bicarbonate, environmental pollution, etc., and achieve the effects of unified social benefits, less cracks, and high strength and hardness
CN102424408AInactive Publication Date: 2012-04-25SHENZHEN XINNUOTAI INVESTMENT MANAGEMENT
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENZHEN XINNUOTAI INVESTMENT MANAGEMENT
Publication Date
2012-04-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a comprehensive utilization method of boric sludge. Comprising a digestion step and a carbonization step in order, the method is characterized in that the digestion step consists of: with boric sludge taken in magnesium oxide terms, mixing boric sludge, calcium oxide and water in a weight ratio of 1:0.5-2:6-10, conducting digestion at a temperature of 85-100DEG C for 2-3.5h. The comprehensive utilization method of boric sludge in the invention has low energy consumption and high magnesium yield. Besides, the waste residue from magnesium compound extraction can be converted into microlites and / or hollow bricks completely, thus realizing high unification of ecological benefits, environmental benefits, economic benefits, and social benefits. And the microlites and hollow bricks prepared by the filter residue from magnesium compound extraction have the advantages of uneasy deformation, uneasy cracking, high strength and hardness, water and frost resistance, etc.
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Description

technical field

[0001] The invention relates to a method for comprehensively utilizing boron mud. Background technique

[0002] my country uses the "carbon soda method" to produce borax (Na 2 B 4 o 7 ) has a history of more than half a century. Its production process is as follows: using boron magnesium ore as raw material, after roasting, adding sodium carbonate (Na 2 CO 3 ), feed carbon dioxide gas simultaneously, make borax, and its reaction equation is:

[0003] 2(2MgO·B 2 o 3 )+Na 2 CO 3 +CO 2 =Na 2 B 4 o 7 +4MgCO 3

[0004] The active ingredient in boronite is boron trioxide (B 2 o 3 ), its content only accounts for about 10% of boron magnesium ore, so a large amount of industrial waste-boron mud is produced every year. Due to the fine particle size of boron mud (120-180 mesh) and strong alkalinity (containing 0.3-0.7% by weight of sodium carbonate, and a pH value of about 8-9), no grass will grow in the place where boron mud is piled up, which not onl...

Claims

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