CN1093519C - Baking-free ardealite brick and its production process - Google Patents

Abstract

The present invention provides a baking-free ardealite brick and a production process thereof. Raw material is composed of ardealite (slag) used as main material, sand used as supplementary material and cement, or paris plaster, or polybutadiene used as adhesives, the components are matched, powdered, mixed and formed under high pressure, and finished products can be prepared after a short-term curing step; the waste slag ardealite of a phosphate plant is fully used, and the pollution of the ardealite deposition to the environment can be effectively and reliably treated; compared with the existing clinkers, the present invention has the advantages of energy saving, land source saving, short periodicity, low cost and zero radioactivity pollution, and baking-free ardealite brick of the present invention is the novel good quality brick having advantages of large compression strength, regular appearance, uniform color and beautiful appearance.

Description

Baking-free ardealite brick and production technique thereof

It is non-burning brick to the present invention relates to the industrial residue that a kind of construction work uses, and particularly a kind of waste residue that utilizes phosphatization industry---phosphogypsum (slag) is non-burning brick for main material production.

According to the knowledge of the applicant: China is along with the phosphatization industrial expansion, existing annual ten thousand tons of the phosphogypsum 1500-2000 that discharge, be less than 10% and effectively utilize, it is main adopting expropriation of land to stack always, by stacking 30 meters of height, annual take up an area of 500 mu, and environment is caused severe contamination, the sustainable development of enterprise is brought very big pressure.And annual about 7,000 hundred million of the clay brick that uses in the whole nation.If have 50% be outside the shale brick, all the other clay brick whole nations also want 200,000 mu of ground to fetch earth to bake bricks, this causes bigger threat to protection land resources.For this reason, clay brick is all wanted to ban use of in national various places, but have good substitute is not arranged.Though disclose a kind of " making non-burning brick method and tackiness agent thereof " with industrial residue at Chinese patent CN1049490A, it is with through grinding pure industrial residue and sandy soil, cement, lime, tackiness agent mixes with small amount of water, again through high pressure compression moulding, but what industrial residue adopted is fine coal, what slag, coal drystone, Calcium Carbide Ash, flyash etc., this technical scheme not can solve industrial residue phosphogypsum effectively utilizes problem.Up to now, also do not find to utilize industrial residue phosphogypsum to make non-burning brick report.

Purpose of the present invention is exactly in order to protect land resources and effectively to utilize industrial residue phosphogypsum to set out, and the contriver successfully develops a kind of baking-free ardealite brick and production technique thereof through for many years the test of concentrating on studies.

The objective of the invention is to realize as follows: utilize the additive that meets national building materials public health standard industrial residue and can utilize natural resources and market to be easy to get to fill a prescription, adopt corresponding high-pressure molding condition to make finished product as raw material.

Baking-free ardealite brick of the present invention, raw material are is major ingredient with the industrial residue, be equipped with the auxiliary material sand and additive is formed, and makes finished product through comprising batching, powder essence, mixing, high-pressure molding, maintenance operation.Its industrial residue is the phosphogypsum of phosphatization industry, and additive is a kind of in cement or the plaster of Paris, the polymer bonding agent, proportioning raw materials by weight percentage:

Phosphogypsum 60-85%,

Sand 5-30%,

Cement or plaster of Paris 3-16%.

Described additive can also be poly-class D caking agent, proportioning raw materials by weight percentage:

Phosphogypsum 75%,

Sand 25%,

Poly-class D caking agent 0.1-0.5%.

Described phosphogypsum is the phosphoric acid salt station-service sulfuric acid extraction phosphogypsum that phosphorus ore produced, its water-soluble P ₂O ₅Less than 0.4%, moisture content is at 5-15%.

The described plaster of Paris is β type calcium sulphate hemihydrate for building.

The described plaster of Paris is the calcium sulphate hemihydrate that becomes with phosphogypsum heating (about 160 ℃) calcination.

Described poly-class D caking agent is a Polybutadiene Series multipolymer caking agent.

Sand is common river sand, stone sand, Huangshi sand, and moisture content is at 3-10%.

Cement can be 325,425,525 cement.

The production technique of baking-free ardealite brick of the present invention comprises that batching, powder essence, mixing, high-pressure molding, maintenance operation make finished product, and its production stage is as follows:

A, raw material is prepared burden by above-mentioned requirements, proportioning raw materials by weight percentage: phosphogypsum 60-85%, sand 5-30%, cement or plaster of Paris 3-16%, raw material water content be in the 5-15% scope,

B, with the caking of the described phosphogypsum of a use to the broken powder machine powder essence of Kun formula to maximum particle size less than 3mm, be transported to mixing machine with rotary conveyor,

C, will prepare burden and carry out thorough mixing at Agravicmixer,

D, enter semi-automatic brick pressing machine through the compound of C, the adobe of making different grade of compressive strength through the adjustable forming pressure of cloth, precompressed and 600-2600KN,

E, adobe is positioned over natural curing canopy maintenance 5-15 days, promptly gets this baking-free ardealite brick product.

The baking-free ardealite brick of the present invention that adopts technique scheme to make, making the waste residue of phosphoric acid saltworks---phosphogypsum obtains comprehensive utilization, the pollution that phosphogypsum is stacked environment obtains reliably, effectively administers: again because without clay-brickmaking, land occupation is not done the stockyard, has protected land resources; If the phosphogypsum in the whole nation has 50% to be used for making baking-free ardealite brick, just can produce 3,000,000,000 bricks without clay, to save and plough 1800 mu/year, the stockyard is taken up an area of 250 mu less, adds up to 2050 mu; If the phosphogypsum complete utilization in the whole nation just can be saved 4100 mu/year in soil.This baking-free ardealite brick is not only energy-conservation than existing clay brick, economize the land resource, and with short production cycle, cost is low, "dead" pollution etc., and be that a kind of ultimate compression strength is big, outward appearance neat, dimensional stabilizing, novel high-quality brick that color and luster is even, attractive in appearance.Baking-free ardealite brick product of the present invention is through check, be the quality various strength criterion MU7,5,10,15,20,25,30 that meet the GB/T5101-98 standard, high-quality construction work brick.So the present invention is that environment-friendly engineering, a wall change engineering, green engineering.

The invention will be further described below in conjunction with embodiment.

Fig. 1 is technological process of production figure of the present invention.

Fig. 2 is that the master of equipment used in the production technique of the present invention looks synoptic diagram.

Fig. 3 is the schematic top plan view of Fig. 2.

Table one is 11 embodiment of batching of the present invention, forming pressure, product strength grade, and its proportioning raw materials and forming pressure parameter are to select by the strength grade requirement of producing baking-free ardealite brick.

Referring to Fig. 1, Fig. 2, Fig. 3 and table one.Listed the consumption proportion of major ingredient phosphogypsum, auxiliary material sand, additive cement, the plaster of Paris, Polybutadiene Series multipolymer caking agent in Table 1,11 specific exampless with forming pressure, strength grade, the production technique of its each embodiment is identical, all make the baking-free ardealite brick finished product of 11 different intensity grades through batching, powder essence, conveying, mixing, conveying, high-pressure molding, maintenance operation, its step is operating as: (1), at first raw material main materials and auxiliary materials and additive are prepared burden by the proportioning metering (weight %) of table one; (2), with manually batching being added on the sieve 2 (wire screen is 8 orders), thin batching is fallen on conveyer belt 3 to fail away by sieve aperture, the compass screen surface of the suitable sieve 2 of ancestral's batching slides and enters on 500 pairs of Kun formulas of φ breaking machine 1, also drops on the conveyer belt 3 through the batching of powder essence less than 3mm; (3), the batching after the powder essence enters the agravic flat mixer 4 of WZL and carries out thorough mixing, to conveyer belt 5, be transported in the high hopper 6 under the batching that mixes; (4), the compound of high hopper 6 enters into semi-automatic octal brick pressing machine 7 under control, produce the qualified adobe of size 8 through links such as cloth, precompressed, high-pressure molding, adobe eject; (5), adobe 8 stacks neatly by manually finding on the flatcar, puts in the maintenance canopy through 5-15 days natural curing, reaches the corresponding strength grade, be up to the standards and dispatch from the factory.

Equipment aborning is existing installation to Kun formula breaking machine 1, transfer roller (3,5), agravic flat mixer 4, and the market can be bought.

Brick pressing machine 7 is YZP-100 (260)-II type, and its structure patent applied for (patent No.: ZL95241530.5), the significant parameter of this brick pressing machine:

Forming pressure: 600KN-2600KN is adjustable

(being 600KN, 1000KN, 1600KN, 2000KN, 2600KN etc.);

The maximum filler degree of depth: 130mm;

Adobe specification: 240 * 115 * 53mm;

Throughput: 1800 pieces/hour.

Embodiment one: proportioning raw materials by weight percentage: phosphogypsum 70%, river sand 23%, cement 7%, adjust raw material total amount moisture 14%, compound enters into semi-automatic brick pressing machine 7, the adjustment forming pressure is 650KN, eject standard size (240 * 115 * 530mm) adobe, put short-term in the maintenance canopy (5-15 days, winter time is long, summer is then short) natural curing, make the qualified product of strength grade MU10." survey report " of this product sees Appendix 1.

Embodiment three: proportioning raw materials by weight percentage: phosphogypsum 85%, river sand 7%, cement 8%, it is moisture 13.6% to adjust the raw material total amount, forming pressure is 1000KN, through above-mentioned same production technique, makes the qualified product of strength grade MU10." survey report " of this product sees Appendix 2.

Embodiment six: proportioning raw materials by weight percentage: phosphogypsum 65%, sand 20%, the plaster of Paris 15%, adjust raw material total amount moisture 15%, compound enters into semi-automatic brick pressing machine 7, the adjustment forming pressure is 2000KN, eject the standard size adobe, put short-term natural curing in the maintenance canopy, make the qualified product of strength grade MU15.

Embodiment seven: proportioning raw materials by weight percentage: phosphogypsum 75%, stone sand 25%, poly-class D caking agent 0.2%, (as: PBAA resin, Polybutadiene Acrylonitrile resin etc.) adjust raw material total amount moisture 10%, compound enters into semi-automatic brick pressing machine 7, the adjustment forming pressure is 2000KN, eject standard-sized adobe, put short-term natural curing in the maintenance canopy, make the qualified product of strength grade MU20.

The batching of baking-free ardealite brick embodiment of the present invention, forming pressure, product strength parameter list table one

Embodiment	Major ingredient weight %	Auxiliary material weight %	Weight of additive %	Raw material total amount water content %	Forming pressure KN	Product strength grade MU
							One	Phosphogypsum 70	River sand 23	Cement 7	14	650	MU1O
Two	Phosphogypsum 70	River sand 20	Cement 10	9.5	2000	MU20
							Three	Phosphogypsum 85	River sand 7	Cement 8	13.6	1000	MU10
Four	Phosphogypsum 60	River sand 30	Cement 10	10.5	2600	MU25
							Five	Phosphogypsum 70	Sand 18	Cement 12	13.5	1000	MU15
Six	Phosphogypsum 65	Sand 20	Gesso 15	15	2000	MU15
							Seven	Phosphogypsum 75	Stone sand 25	Poly-class D caking agent 0.2	10	2000	MU20
Eight	Phosphogypsum 65	Sand 25	Cement 5	6	2600	MU15
							Nine	Phosphogypsum 78	Sand 12	Cement 10	10	2000	MU15
Ten	Phosphogypsum 70	Sand 26	Cement 10	1O	1600	MU15
							11	Phosphogypsum 70	Huangshi sand 20	Cement 10	10	1600	MU15

All phosphogypsum chemical constitutions and phosphogypsum chemical constitution in all parts of the country are basic identical in the foregoing description: contain CaO30.83%, SO ₃43.48%, Fe ₂O ₃0.29%, Al ₂O ₃0.186%, MgO 1.29%, P ₂O ₅Water-soluble≤0.42%, P ₂O ₅Total 1.29%, crystal water 17.93%, F 0.14%.

Specific radioactivity: Ra-226=93.1 ± 3.9Bq/kg

Be lower than related standards: Ra-226=140Bq/kg-185Bq/kg

The SiO of Huangshi sand ₂Be 40%, the SiO of general sand ₂Be 50%.

Claims (6)

1, the baking-free ardealite brick used of a kind of construction work, raw material is is major ingredient with the industrial residue, be equipped with the auxiliary material sand and additive is formed, make finished product through batching, powder essence, mixing, high-pressure molding, maintenance operation, it is characterized in that: industrial residue is the phosphogypsum of phosphatization industry, additive is the cement or the plaster of Paris, proportioning raw materials by weight percentage:

Phosphogypsum 60-85%,

Sand 5-30%,

Cement or plaster of Paris 3-16%.

2, the baking-free ardealite brick used of a kind of construction work, raw material is is major ingredient with the industrial residue, be equipped with the auxiliary material sand and additive is formed, make finished product through batching, powder essence, mixing, high-pressure molding, maintenance operation, it is characterized in that: industrial residue is the phosphogypsum of phosphatization industry, additive is a Polybutadiene Series multipolymer caking agent, proportioning raw materials by weight percentage:

Phosphogypsum 75%,

Sand 25%,

Polybutadiene Series multipolymer caking agent 0.1-0.5%.

3, baking-free ardealite brick according to claim 1 and 2 is characterized in that: described phosphogypsum is the phosphoric acid salt station-service sulfuric acid extraction phosphogypsum that phosphorus ore produced.

4, baking-free ardealite brick according to claim 1 is characterized in that: the described plaster of Paris is β type calcium sulphate hemihydrate for building.

5, baking-free ardealite brick according to claim 1 is characterized in that: the described plaster of Paris is the calcium sulphate hemihydrate that becomes with phosphogypsum heating calcination.

6, the production technique of the baking-free ardealite brick used of a kind of construction work comprises batching, powder essence, mixing, high-pressure molding, maintenance operation, it is characterized in that: make finished product by following step:

A, by aforesaid right requirement 1 described batching, proportioning raw materials by weight percentage:

Phosphogypsum 60-85%,

Sand 5-30%,

Cement or plaster of Paris 3-16%,

B, with the caking of the described batching phosphogypsum of a use to the broken powder machine powder essence of Kun formula to maximum particle size less than 3mm, be transported to mixing machine with rotary conveyor,

C, will prepare burden and carry out thorough mixing at Agravicmixer,

D, enter semi-automatic brick pressing machine through the compound of C, the adobe of making different grade of compressive strength through the adjustable forming pressure of cloth, precompressed and 600-2600KN,

E, adobe is positioned over natural curing canopy maintenance 5-15 days, obtains described product.