Cast stone powder and clay

Cast stone powder is made from crystallized cast stone after crushing and screening. Has high wear resistance and corrosion resistance. It is mixed with cast stone sand and cast stone aggregates and can be tamped with binders such as furan resin and unsaturated resin to form wear-resistant and anti-corrosion concrete, which not only has the wear-resistant and anti-corrosion properties of cast stone, but also has good impact resistance, toughness and High mechanical strength. According to the needs of customers, various types of clay are produced using cast stone powder as raw material. Such as sodium water glass cement, epoxy resin cement, furan cement, etc.

Common specifications of cast stone powder: 80 mesh-200 mesh.

1. Furan resin clay

 Furan resin is a general name for resins produced from furfuryl alcohol and furfural with furan rings as raw materials. Furan resin clay is prepared from furan resin and clay powder. Furan cement has good bonding effect, long-term temperature curing, and is easy to construct. After hardening, furan cement has excellent acid resistance, alkali resistance, and acid-alkali resistance. It is mainly used for masonry and hooking of wear-resistant linings in power plants, coking plants, etc. seams, as well as various reactors, storage tanks, wastewater treatment, waste acid and other recycling projects in chemical plants.

1. Material preparation

 The quality requirements of furan resin cement raw materials should meet the following regulations:

  (1) Furan resin clay should be prepared from furan resin and clay powder.

 (2) Furan resin is a brown or brown-red viscous liquid. Furan resin clay powder is gray powder with qualified volume stability and curing time (20-25℃) should not exceed 12 hours.

2. Construction temperature

The construction temperature should be 15-20℃, and the relative humidity should not be greater than 80%. When the ambient temperature is below 10°C, heating and insulation measures should be taken, but direct heating by open flame or steam is not allowed.

3. Grass

2) Potassium water glass cement

Potassium silicate glass cement is a silicate-type acid-resistant and heat-resistant material formulated with potash silicate as the cementing material, condensed aluminum phosphate as the curing agent, silicon-aluminum oxide as acid-resistant and heat-resistant powder and aggregate, and a small amount of auxiliary materials. . At present, the main varieties are potassium water glass cement, potassium water glass mortar and potassium water glass concrete. The commonly used product model is KP1 type. Now it is widely used in anti-corrosion projects such as reactors, storage tanks, electrolyzers, pickling tanks, chimneys, flues, floors, floors, silo linings, sewage equipment and other anti-corrosion projects, and has achieved good results. Physical properties of potassium water glass

2. Configure stirring

(1) Mechanical mixing: According to the specified proportion, first add the powder and sodium fluorosilicate into the forced concrete mixer, dry and stir evenly, then add water glass and wet stir until uniform.

(2) Manual stirring: The powder and sodium fluorosilicate should be mixed according to the specified proportion, dry and stir evenly, then add water glass and wet stir until uniform.

3. Construction temperature

The ambient temperature for anti-corrosion and wear-resistant engineering construction of sodium silicate cement should be 15 to 30°C, which is relatively

Humidity should not be greater than 80%. When the construction environment is lower than 10℃, heating and insulation measures should be taken.

4. Use and maintenance

When the temperature is above 10-20°C, the natural curing period in the air is 10 days. The maintenance period for ground construction is 10 days. The maintenance period for storage tanks is 12 days. The maintenance period for silos off the ground is 14 days. When the temperature is 20-35°C, the natural curing period in the air can be shortened. one third. After the curing period, the final tensile strength can be reached. If used too early, the bond strength or tensile strength will be reduced, and the service life will be reduced. Direct contact with water vapor is strictly prohibited during construction and maintenance.

3. Epoxy resin cement

Epoxy resin cement is a polymer molecule-modified polymer waterproof and anti-corrosion material. Epoxy resin cement has durability, impermeability, compactness and extremely high bonding strength as well as strong waterproof and anti-corrosion effects. It can withstand the corrosion of soda ash production medium, urea, ammonium nitrate, seawater hydrochloric acid and acid and alkali salts. It can be used for the treatment of building walls and floors and the waterproofing layer of underground projects.

1. Material preparation

(1) EP 01451-310 and EP 041551-310 epoxy resin should be used as adhesive.

(2) Preparation of cem