Preparation method and application of a straw-starch-based composite sulfonated water reducer
A water reducing agent and starch-based technology, which is applied in the field of preparation of straw-starch-based composite sulfonated water reducing agent, can solve the problem that the degree of fineness of straw crushing is not proposed, the value of development and utilization of water reducing agent is limited, and straw raw materials cannot be fully utilized and other problems, to achieve the effect of low cost, good water dispersion performance, and increased reactive area
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Embodiment 1
[0114] A preparation method of a straw-starch-based composite sulfonated water reducer, the specific steps are as follows:
[0115] S1: Straw raw material pretreatment, the specific process is as follows:
[0116] The first step: primary crushing, fine crushing, cleaning, drying, and fine crushing pretreatment of straw raw materials, as follows:
[0117] After a certain amount of raw material straw bales are naturally air-dried, they are crushed into straw sections of about 1 to 3 cm by the primary straw crushing device 3, and then further crushed and screened by the rotary screening device 5 and the straw fine crushing device 6, and passed through the sieve to obtain The fine straw section below 5mm is preliminarily dedusted by the dust removal device 4; the material is sent to the cleaning device 9 through the 1# straw crushed lifting conveying air duct 8, and the impurities such as mud and sand in the straw fine crushed material are further cleaned; cleaning The final straw ...
Embodiment 2
[0136] A preparation method of a straw-starch-based composite sulfonated water reducer, the specific steps are as follows:
[0137] S1: Straw raw material pretreatment, the specific process is as follows:
[0138] The first step: primary crushing, fine crushing, cleaning, drying, and fine crushing pretreatment of straw raw materials. Process is completely with embodiment 1;
[0139] The second step: straw powder hydrolysis pretreatment. Process is completely identical with embodiment 1, and difference is that the hydrolysis catalytic acid that adds is different, is embodied in:
[0140] The lubricating additive is stearic acid, and the solid-to-solid ratio of straw and stearic acid=1000g:10ml.
[0141] The main catalytic acid for hydrolysis is a dicarboxylic acid represented by itaconic acid, and the solid-acid ratio of straw to itaconic acid=1000g:20ml;
[0142] Hydrolysis-promoting acid is the dilute hydrochloric acid that mass concentration is 30g / L, and the solid-acid ...
Embodiment 3
[0152] A preparation method of a straw-starch-based composite sulfonated water reducer, the specific steps are as follows:
[0153] S1: Straw raw material pretreatment, the specific process is as follows:
[0154] The first step: primary crushing, fine crushing, cleaning, drying, and fine crushing pretreatment of straw raw materials. Process is completely with embodiment 1;
[0155] The second step: straw powder hydrolysis pretreatment. Process is completely identical with embodiment 1, and difference is that the hydrolysis catalytic acid that adds is different, is embodied in:
[0156] The lubricating additive is a mixture of stearic acid and oleic acid each accounting for 1 / 2, and the solid-to-solid ratio of straw and lubricating additive=1000g:10ml.
[0157] The main catalytic acid for hydrolysis is a polycarboxylic acid represented by citric acid, and the solid-acid ratio of straw to citric acid=1000g:15ml;
[0158] Hydrolysis-promoting acid is the mixed acid that mass c...
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