CN1207243C - Process of vitrified bonding red brick by adding dicyandiamide muck - Google Patents

Abstract

The present invention relates to a new process of production for firing various types of building bricks by using industrial waste slag discharged from dicyanodiamide production as additive, adding clay, and adding a little white coal as fuel. The production process flow comprises the steps: raw material preparation, pulverization, mixing, agitation, shaping, drying and calcination. Waste slag of dicyanodiamide is required to be dewatered to the water content below 23 %; a small amount of white coal is added; the mixture is uniformly agitated, and extruded and shaped into adobe in clay; the adobe is loaded into a furnace to be calcined at temperature of 800 to 1000 DEG C after being naturally dried. The present invention has the advantages of energy source saving, industrial waste slag governing, effective environment protection, advanced process, reliable technique, low cost, good product quality and better economical and social benefit.

Description

Utilize dicyandiamide sludge as material to add the technology of vitrified bond common brick

The present invention relates to a kind of is material of main part with clay and dicyandiamide sludge as material, and other adds the production technique that a little anthracite is made building brick.

At present, adopt coal to make fuel, clay is the basic materials of building trade as the starting material baking red bricks, and this method consumption of coal is many, the brick making cost height, pile up like a mountain and domestic past and existing Dyhard RU 100 manufacturer produce a large amount of dicyandiamide sludge as material in process of production, take a large amount of soils, deslagging part sewage crossing current causes environmental pollution, hazardous and noxious substances in the waste residue has seriously been destroyed local ecotope, has brought many disadvantageous effects for simultaneously local resident.

The object of the invention is to make full use of the operability of dicyandiamide sludge as material, improves local ecotope, provides a kind of surrogate fusion clay that utilizes dicyandiamide sludge as material to make coal to make various model common bricks are made in adobe through high-temperature calcination technology.

Technical scheme of the present invention: be to utilize dicyandiamide sludge as material and a little coal blending adding clay to make adobe to make various model common bricks (containing hollow brick) through high-temperature calcination.Clay and coal and waste residue proportioning are 90: 6: 4, and concrete operations are decided on soil property, and production technique comprises following technical process: 1. preparation of raw material, 2. pulverizing, 3. mixing stirring, 4. moulding, 5. dry, 6. roasting.

Technical characterictic:

1, preparation of raw material: pour dicyandiamide sludge as material into stock ground and dewater standby naturally to warehouse-in below 23%; It is standby that clay is poured the stock ground into, and it is standby that anthracite is poured the stock ground into through pulverized particles Φ 1mm-2mm.

2, pulverize: adopt the two-wheel pulverizer that compound is pulverized, 90-95% particle wherein in the mixture after crushed can be less than Φ 0.8mm.And 5%-10%, can be greater than Φ 1mm.Like this, thereby make blended stock give full play to the cohesiveness of clay, make blended stock have good processability.

3, mix stirring: the weight proportion by clay, anthracite, waste residue is 90: 6: 4 (deciding on the soil property situation).Adopt biaxial rneader mixing stirring, the moisture after the stirring is that 18-20% is advisable.

4, moulding: adopt extrusion under vacuum, pressure 1-1.5Mpa, water ratio are below 20%.

5, drying: the adobe of making dehydrates in nature, and dry epoch is 24-48 hour.

6, roasting: adobe roasting elder generation preheating 4-6 hour, roasting process is 5-7 hour, insulation cooling 8-9 hour, and it is 200 ℃ that preheating adds temperature, heat through air volume control, the roasting top temperature is 800-1000 ℃, evenly rises to 800 ℃ through temperature after 4-6 hour, after 2-3 hour, 900-1000 ℃ of temperature rising,, cool off through insulation in 8-9 hour again, after 5-7 hour in the high-temperature zone roasting up to coming out of the stove.Owing to contain the fixed carbon of certain ingredients in the dicyandiamide sludge as material, bigger thermal value is arranged, therefore, fuel economy reduces raw-material cost in a large number, economic benefit that can obtain and social benefit.

Claims (5)

1. A kind of is to add raw material to add the novel process that a small amount of anthracite mixes the building brick of mixing the sintering all size of forming in the clay blank into the dicyandiamide sludge as material, comprising following technical process: 1. preparation of raw material, 2. pulverize, 3. mix stirrings, 4. moulding, 5. drying, 6. roasting.

   Its technical characterictic is:

   1, dicyandiamide sludge as material is poured into the stock ground and dewatered standbyly below 23% naturally, it is standby that anthracite is pulverized Φ 1mm-Φ 2mm warehouse-in;
2. 2, regulated input stirrer in mixing back by the weight proportion of clay, anthracite, waste residue with 90: 6: 4 and stir, the moisture content after the stirring is less than 20%;
3. 3, compound is pulverized, particle is less than accounting for 90-95% below the Φ 0.8mm, greater than accounting for 5-10% more than the Φ 1mm;
4. 4, with the compound extrusion molding that stirs, pressure is 1-1.5MPa, becomes parison brick moisture content less than 20%;
5. 5, the base brick is gone into the kiln roasting, preheating 4-6 hour, roasting 5-7 hour, to cool off 8-9 hour, it is 200 ℃ that preheating adds temperature, heats through air volume control, the roasting top temperature is 800-1000 ℃.