CN1137027A - Compound magnesium gelatinous material and making method and use thereof - Google Patents

Abstract

A composite cementing material of magnesium used to produce magnesia tile, packing box of electromechanical apparatus and building partition is prepared through such steps as calcining dolomite at 650-750 deg.C, crushing until the proportion of 170-325 mesh particles is 75%, and mixing with magnesite.

Description

Compound magnesium gelatinous material and manufacture method thereof and application

The present invention relates to a kind of compound magnesium gelatinous material and manufacture method thereof and application.

Existing magnesium gelatinous material (magnesia) generally is with giobertite levigate again forming after calcination.Be used to produce magnesite tile in a large number, the tr section bar of various electromechanical equipments etc.Once be referred to as most promising generation wooden packing material by professor relevant expert, (seeing " latex material ", Yuan Runzhang chief editor, press of Wuhan Polytechnical Univ, 1989) holds out broad prospects.But magnesite deposit is more common in provinces such as Liaoning, Shandong and the Inner Mongol.And the magnesium gelatinous material that use in the area (as areas such as Central-South, southwest) that lacks magnesite resource all is to buy from the other places, and freight and miscellaneous charges is also higher than its local price, so cost is higher.From prior art, industrial is that the magnesium gelatinous material that raw material is made yet there are no with rhombspar, and the dolomite mineral reserves of China are big, and it is wide to distribute, and only just there are tens million of tons the Lingui in Guangxi, Xingan, Quanzhou County.But the concrete that single rhombspar magnesium gelatinous material is made (adding wood chip, down together) its ultimate compression strength not high (experimental data sees Table 1) is with the safety margin requirement 130kg f/cm of national material local standard ²Gap is still arranged.

Purpose of the present invention will provide a kind of rhombspar that both utilized to be raw material exactly, make its concrete crushing strength reach and surpass the compound magnesium gelatinous material of safety margin requirement again, for opening up new approach in the raw material and the magnesium gelatinous material source that solve magnesium gelatinous material.

The present invention is achieved in that

(1) manufacture method: (1) makes the MgCO in the dolomite mineral with dolomite mineral calcination under 650 ℃～750 ℃ temperature ₃Decompose as far as possible and avoid wherein CaCO ₃Decompose.(2) product of gained after the calcination is levigate, its size composition is for partly to account for more than 75% less than 170～325 purposes, get final product the caustic dolomite gelling material.(3) with the magnesia blending of the caustic dolomite gelling material and 80%～40% (weight) of 20%～60% (weight).

Table 1: the concrete crushing strength test-results that single caustic dolomite magnesium gelatinous material is made

(wood chip: magnesium gelatinous material=1: 3)

Numbering	Ultimate compression strength		Numbering	Ultimate compression strength		Numbering	Ultimate compression strength
									Monodrome kg f/cm 2	Mean value kg f/cm 3	Monodrome kg f/cm 2	Mean value kg f/cm 2	Monodrome kg f/cm 2	Mean value kg f/cm 2
	???A 11???A 12???A 13	????76.0 ????60.2 ????55.2		? ???63.8	???A 31???A 32???A 33		????60.5 ????70.3 ????66.5	? ????65.8							????A 51????A 52????A 53	????105.1 ????85.9 ????83.5	? ?????91.5
???A 21???A 22???A 23			????99.5 ????102.8 ????81.1			? ???94.5			???A 41???A 42???A 43	????133.3 ????103.6 ????113.9	? ????116.9	????A 61????A 62????A 63	????95.0 ????111.4 ????100.9	? ?????102.5

(4) the blending material with (3) mixes or gets final product with stirring after the bittern mediation.

(2) use: compound magnesium gelatinous material and bittern, light filler (as wood chip, wheat straw etc.) are mixed make magnesium oxychloride concrete (its ultimate compression strength sees Table 2, the safety margin that reaches and surpassed national material local standard requires), become bamboo reinforced concrete behind the preparation bamboo reinforcement, can be made into various electronic products for the wooden packing material, as the end of making tr, is stupefied, base plate, side plate and cover plate, and it can be followed closely and can saw.Also can be prefabricated into house inner partition wall etc.Also available compound magnesium gelatinous material and bittern, glass fibre (cloth) and various mineral dye become (also can not add mineral dye) such as roofing corrugated tiles after mixing the type of making.

Embodiment 1: produce magnesium concrete

With dolomite mineral calcination under the situation of 700 ℃ of temperature, and then through broken, levigate, its granularity is less than 180 orders, gets final product to such an extent that the magnesia blending of caustic dolomite gelling material and 40%～60% (weight) of caustic dolomite gelling material 60%～40% (weight) promptly gets compound magnesium gelatinous material.Be that the bittern of 20Be ' is in harmonious proportion with concentration again after the wood chip of the compound magnesium gelatinous material and 25% (weight) of 75% (weight) mixed, be magnesium concrete after stirring.Its cubic compressive strength reaches 174.9～251.1kg/cm ²Unit weight 1230kg/m ³Reached State Bureau of Materials and Equipment's ministerial standard (WB3-82) and should not be lower than 100kg f/cm with the magnesium oxychloride concrete cubic compressive strength about the tr member ²(100 label), the requirement that safety margin 130 labels are above.After magnesium concrete is mixed bamboo reinforcement, the tr member of electromechanical equipment be can make, house inner partition wall or movable dwellings partition wall section bar also can be made.

Embodiment 2 production house corrugated tiles

After the magnesia blending with the caustic dolomite gelling material and 60% (weight) of 40% (weight), be that the bittern of 24Be ' is in harmonious proportion and stirs with concentration again, join filamentary material such as glass fibre (cloth) when annotate the shop in Waveform mould, at normal temperature or about 25 ℃ of drying room temperature

Table 2: the magnesium concrete compressive strength test result that compound magnesium gelatinous material is made

(wood chip: magnesium gelatinous material=1: 3)

Numbering	Ultimate compression strength		Numbering	Ultimate compression strength		Numbering	Ultimate compression strength
									Monodrome kg f/cm 2	Mean value kg f/cm 2	Monodrome kg f/cm 2	Mean value kg f/cm 2	Monodrome kg f/cm 2	Mean value kg f/cm 2
	??F401 ??F402 ??F403	????181.5 ????164.8 ????166.6		? ?????170.9	????B501 ????B502 ????B503		????202.1 ????207.5 ????210.4	? ????206.7							???C601 ???C602 ???C603	????179.5 ????207.1 ????183.5	? ??190.0
??F501 ??F502 ??F503			????172.0 ????182.8 ????169.8			? ?????174.9			????B601 ????B602 ????B603	????237.3 ????253.7 ????262.4	? ????251.1
	??B401 ??B402 ??B403	????186.5 ????185.2 ????201.5		? ?????191.1	????C501 ????C502 ????C503		????239.5 ????224.3 ????233.6	? ????232.5

Condition under the demoulding after maintenance in 18～24 hours is fixed, amputate the corner redundance again and get final product.Its size can be long 1.8 meters, and is wide 0.72 meter, thick about 0.005 meter.

It is the raw material production magnesium gelatinous material that the present invention has adopted with the rhombspar, for the production of magnesium gelatinous material provides wider raw material sources, opened up new approach, reduced cost, and development and utilization becomes possibility to make the rhombspar resource of China's abundant obtain to a greater degree.

Claims (3)

1, compound magnesium gelatinous material is characterized in that it is to be mixed by caustic dolomite (powder) and magnesia, and its proportioning is:

Caustic dolomite (powder) 20～60% (weight)

Magnesia 80～40% (weight)

2, compound magnesium gelatinous material according to claim 1 is characterized in that can be used for producing magnesite tile, various electromechanical equipment tr, house partition wall etc.;

3, the manufacture method of compound magnesium gelatinous material:

(1) with dolomite mineral calcination under 650 ℃～750 ℃ temperature;

(2) with the product fragmentation of (1), the levigate granularity that becomes less than 170 orders～325 purpose portions

Divide get final product after accounting for more than 75% the caustic dolomite gelling material;

(3) with the caustic dolomite gelling material and 80% of 20%～60% (weight)～

40% magnesia blending;

(4) the blending material with (3) mixes or gets final product with stirring after the bittern mediation.