Checking work of castable material before construction

Construction of casting material before should strictly check the following:

1, castable material construction is made of steel or hard wood templates are available. The template must be of adequate strength, good rigidity, not out of shape, do not shift, no leakage of slurry. Steel template to mold release agent. Wood template to brush waterproofpaint. The repeated use of the template to cleaning, painting can be used.

2 water, pouring material should be strictly according to the manual control, shall not exceed the limit. Under the premise of ensuring the construction performance, the amount of water should be less than.

3,  castable refractory mixing time should not less than 5 minutes. The operation to the use of forced mixer. Mixing should first dry mix, then add 80% dosage of water mixing, and then depending on the extent of wet and dry, gently stir until the remaining water, obtaining suitable work consistency so far. Stirring casting materialdifferent should first mixer clean.

4, pouring material must use the whole barrel bag full of. Stirring casting material generally good must be used within 30 minutes. Drying at high temperature working environment should be appropriate to shorten this time. Already first castable coagulation even caking not poured into the mould, nor of mixing water reuse.

5, if the project inspection unqualified should deal with qualified rear can construction. Expired materials shall not be used. Construction of castable to ensure that no power outages not interrupted construction.

The second quarter of Henan refractory products quality supervision and inspection results

2014 for the second quarter of Quality and Technical Supervision, Henan Province, therefractory product quality supervision and inspection of the province, were taken Zhengzhou, Luoyang, Xuchang, Nanyang four provincial cities and Gongyi a straight pipe county (city) 53 companies production of 89 batches of refractory products, a batch of the product does not meet the standard requirements.

This inspection according to GB / T 2988-2012 “aluminum brick”, YB / T 5106-2009 “clay firebrick”, GB / T 2275-2007 “magnesia and magnesia bricks“, YB / T 5049-2009 “skateboard brick” and other refractory product standards and product quality requirements express, the chemical composition of the product mass fraction, melt index, apparent porosity, bulk density, true density, apparent density, room temperature flexural strength, compressive strength at room temperature, heating permanent change, load softening start temperature, refractoriness,high temperature flexural strength, thermal conductivity, thermal expansion, thermal shock resistance and abrasion resistance at room temperature, such as 17 projects have been tested.

After sampling, a company of a batch Galaxy MgO-C (Specifications Model MT-14C production date 2014-2-28) does not meet the standard requirements, related to the carbon content of the project. Henan Province Quality and Technical Supervision said it had instructed the relevant provincial cities, straight county (city) quality and technical supervision departments in accordance with relevant laws and regulations of this inspection in substandard products and production companies and the law.